module: sign with sha512 instead of sha1 by default #11

modules-kpd-app · 2024-10-16T19:12:48Z

Pull request for series with
subject: module: sign with sha512 instead of sha1 by default
version: 2
url: https://patchwork.kernel.org/project/linux-modules/list/?series=899819

modules-kpd-app · 2024-10-16T19:12:49Z

Upstream branch: 9852d85
series: https://patchwork.kernel.org/project/linux-modules/list/?series=899819
version: 2

modules-kpd-app · 2024-10-19T19:13:13Z

Upstream branch: 9852d85
series: https://patchwork.kernel.org/project/linux-modules/list/?series=899819
version: 2

modules-kpd-app · 2024-10-19T22:11:28Z

Upstream branch: 2295cf8
series: https://patchwork.kernel.org/project/linux-modules/list/?series=899819
version: 2

modules-kpd-app · 2024-10-19T23:03:50Z

Upstream branch: 2295cf8
series: https://patchwork.kernel.org/project/linux-modules/list/?series=899819
version: 2

modules-kpd-app · 2024-10-23T00:10:10Z

Upstream branch: 2295cf8
series: https://patchwork.kernel.org/project/linux-modules/list/?series=899819
version: 2

modules-kpd-app · 2024-10-28T16:37:36Z

Upstream branch: 84b4a51
series: https://patchwork.kernel.org/project/linux-modules/list/?series=899819
version: 2

modules-kpd-app · 2024-10-28T18:18:26Z

Upstream branch: 84b4a51
series: https://patchwork.kernel.org/project/linux-modules/list/?series=899819
version: 2

modules-kpd-app · 2024-10-28T19:45:04Z

Upstream branch: 84b4a51
series: https://patchwork.kernel.org/project/linux-modules/list/?series=899819
version: 2

modules-kpd-app · 2024-10-28T21:46:12Z

Upstream branch: 84b4a51
series: https://patchwork.kernel.org/project/linux-modules/list/?series=899819
version: 2

modules-kpd-app · 2024-10-28T22:30:15Z

Upstream branch: af08475
series: https://patchwork.kernel.org/project/linux-modules/list/?series=899819
version: 2

modules-kpd-app · 2024-10-28T23:51:24Z

Upstream branch: af08475
series: https://patchwork.kernel.org/project/linux-modules/list/?series=899819
version: 2

modules-kpd-app · 2024-10-29T00:11:33Z

Upstream branch: af08475
series: https://patchwork.kernel.org/project/linux-modules/list/?series=899819
version: 2

Switch away from using sha1 for module signing by default and use the more modern sha512 instead, which is what among others Arch, Fedora, RHEL, and Ubuntu are currently using for their kernels. Sha1 has not been considered secure against well-funded opponents since 2005[1]; since 2011 the NIST and other organizations furthermore recommended its replacement[2]. This is why OpenSSL on RHEL9, Fedora Linux 41+[3], and likely some other current and future distributions reject the creation of sha1 signatures, which leads to a build error of allmodconfig configurations: 80A20474797F0000:error:03000098:digital envelope routines:do_sigver_init:invalid digest:crypto/evp/m_sigver.c:342: make[4]: *** [.../certs/Makefile:53: certs/signing_key.pem] Error 1 make[4]: *** Deleting file 'certs/signing_key.pem' make[4]: *** Waiting for unfinished jobs.... make[3]: *** [.../scripts/Makefile.build:478: certs] Error 2 make[2]: *** [.../Makefile:1936: .] Error 2 make[1]: *** [.../Makefile:224: __sub-make] Error 2 make[1]: Leaving directory '...' make: *** [Makefile:224: __sub-make] Error 2 This change makes allmodconfig work again and sets a default that is more appropriate for current and future users, too. Link: https://www.schneier.com/blog/archives/2005/02/cryptanalysis_o.html [1] Link: https://csrc.nist.gov/projects/hash-functions [2] Link: https://fedoraproject.org/wiki/Changes/OpenSSLDistrustsha1SigVer [3] Signed-off-by: Thorsten Leemhuis <linux@leemhuis.info> Reviewed-by: Sami Tolvanen <samitolvanen@google.com> Tested-by: kdevops <kdevops@lists.linux.dev> [0]

modules-kpd-app · 2024-10-29T23:35:49Z

Upstream branch: af08475
series: https://patchwork.kernel.org/project/linux-modules/list/?series=899819
version: 2

modules-kpd-app · 2024-11-01T21:32:00Z

At least one diff in series https://patchwork.kernel.org/project/linux-modules/list/?series=899819 irrelevant now. Closing PR.

During the update procedure, when overwrite element in a pre-allocated htab, the freeing of old_element is protected by the bucket lock. The reason why the bucket lock is necessary is that the old_element has already been stashed in htab->extra_elems after alloc_htab_elem() returns. If freeing the old_element after the bucket lock is unlocked, the stashed element may be reused by concurrent update procedure and the freeing of old_element will run concurrently with the reuse of the old_element. However, the invocation of check_and_free_fields() may acquire a spin-lock which violates the lockdep rule because its caller has already held a raw-spin-lock (bucket lock). The following warning will be reported when such race happens: BUG: scheduling while atomic: test_progs/676/0x00000003 3 locks held by test_progs/676: #0: ffffffff864b0240 (rcu_read_lock_trace){....}-{0:0}, at: bpf_prog_test_run_syscall+0x2c0/0x830 #1: ffff88810e961188 (&htab->lockdep_key){....}-{2:2}, at: htab_map_update_elem+0x306/0x1500 #2: ffff8881f4eac1b8 (&base->softirq_expiry_lock){....}-{2:2}, at: hrtimer_cancel_wait_running+0xe9/0x1b0 Modules linked in: bpf_testmod(O) Preemption disabled at: [<ffffffff817837a3>] htab_map_update_elem+0x293/0x1500 CPU: 0 UID: 0 PID: 676 Comm: test_progs Tainted: G ... 6.12.0+ #11 Tainted: [W]=WARN, [O]=OOT_MODULE Hardware name: QEMU Standard PC (i440FX + PIIX, 1996)... Call Trace: <TASK> dump_stack_lvl+0x57/0x70 dump_stack+0x10/0x20 __schedule_bug+0x120/0x170 __schedule+0x300c/0x4800 schedule_rtlock+0x37/0x60 rtlock_slowlock_locked+0x6d9/0x54c0 rt_spin_lock+0x168/0x230 hrtimer_cancel_wait_running+0xe9/0x1b0 hrtimer_cancel+0x24/0x30 bpf_timer_delete_work+0x1d/0x40 bpf_timer_cancel_and_free+0x5e/0x80 bpf_obj_free_fields+0x262/0x4a0 check_and_free_fields+0x1d0/0x280 htab_map_update_elem+0x7fc/0x1500 bpf_prog_9f90bc20768e0cb9_overwrite_cb+0x3f/0x43 bpf_prog_ea601c4649694dbd_overwrite_timer+0x5d/0x7e bpf_prog_test_run_syscall+0x322/0x830 __sys_bpf+0x135d/0x3ca0 __x64_sys_bpf+0x75/0xb0 x64_sys_call+0x1b5/0xa10 do_syscall_64+0x3b/0xc0 entry_SYSCALL_64_after_hwframe+0x4b/0x53 ... </TASK> It seems feasible to break the reuse and refill of per-cpu extra_elems into two independent parts: reuse the per-cpu extra_elems with bucket lock being held and refill the old_element as per-cpu extra_elems after the bucket lock is unlocked. However, it will make the concurrent overwrite procedures on the same CPU return unexpected -E2BIG error when the map is full. Therefore, the patch fixes the lock problem by breaking the cancelling of bpf_timer into two steps for PREEMPT_RT: 1) use hrtimer_try_to_cancel() and check its return value 2) if the timer is running, use hrtimer_cancel() through a kworker to cancel it again Considering that the current implementation of hrtimer_cancel() will try to acquire a being held softirq_expiry_lock when the current timer is running, these steps above are reasonable. However, it also has downside. When the timer is running, the cancelling of the timer is delayed when releasing the last map uref. The delay is also fixable (e.g., break the cancelling of bpf timer into two parts: one part in locked scope, another one in unlocked scope), it can be revised later if necessary. It is a bit hard to decide the right fix tag. One reason is that the problem depends on PREEMPT_RT which is enabled in v6.12. Considering the softirq_expiry_lock lock exists since v5.4 and bpf_timer is introduced in v5.15, the bpf_timer commit is used in the fixes tag and an extra depends-on tag is added to state the dependency on PREEMPT_RT. Fixes: b00628b ("bpf: Introduce bpf timers.") Depends-on: v6.12+ with PREEMPT_RT enabled Reported-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Closes: https://lore.kernel.org/bpf/20241106084527.4gPrMnHt@linutronix.de Signed-off-by: Hou Tao <houtao1@huawei.com> Reviewed-by: Toke Høiland-Jørgensen <toke@kernel.org> Link: https://lore.kernel.org/r/20250117101816.2101857-5-houtao@huaweicloud.com Signed-off-by: Alexei Starovoitov <ast@kernel.org>

libtraceevent parses and returns an array of argument fields, sometimes larger than RAW_SYSCALL_ARGS_NUM (6) because it includes "__syscall_nr", idx will traverse to index 6 (7th element) whereas sc->fmt->arg holds 6 elements max, creating an out-of-bounds access. This runtime error is found by UBsan. The error message: $ sudo UBSAN_OPTIONS=print_stacktrace=1 ./perf trace -a --max-events=1 builtin-trace.c:1966:35: runtime error: index 6 out of bounds for type 'syscall_arg_fmt [6]' #0 0x5c04956be5fe in syscall__alloc_arg_fmts /home/howard/hw/linux-perf/tools/perf/builtin-trace.c:1966 #1 0x5c04956c0510 in trace__read_syscall_info /home/howard/hw/linux-perf/tools/perf/builtin-trace.c:2110 #2 0x5c04956c372b in trace__syscall_info /home/howard/hw/linux-perf/tools/perf/builtin-trace.c:2436 #3 0x5c04956d2f39 in trace__init_syscalls_bpf_prog_array_maps /home/howard/hw/linux-perf/tools/perf/builtin-trace.c:3897 #4 0x5c04956d6d25 in trace__run /home/howard/hw/linux-perf/tools/perf/builtin-trace.c:4335 #5 0x5c04956e112e in cmd_trace /home/howard/hw/linux-perf/tools/perf/builtin-trace.c:5502 #6 0x5c04956eda7d in run_builtin /home/howard/hw/linux-perf/tools/perf/perf.c:351 #7 0x5c04956ee0a8 in handle_internal_command /home/howard/hw/linux-perf/tools/perf/perf.c:404 #8 0x5c04956ee37f in run_argv /home/howard/hw/linux-perf/tools/perf/perf.c:448 #9 0x5c04956ee8e9 in main /home/howard/hw/linux-perf/tools/perf/perf.c:556 #10 0x79eb3622a3b7 in __libc_start_call_main ../sysdeps/nptl/libc_start_call_main.h:58 #11 0x79eb3622a47a in __libc_start_main_impl ../csu/libc-start.c:360 #12 0x5c04955422d4 in _start (/home/howard/hw/linux-perf/tools/perf/perf+0x4e02d4) (BuildId: 5b6cab2d59e96a4341741765ad6914a4d784dbc6) 0.000 ( 0.014 ms): Chrome_ChildIO/117244 write(fd: 238, buf: !, count: 1) = 1 Fixes: 5e58fcf ("perf trace: Allow allocating sc->arg_fmt even without the syscall tracepoint") Signed-off-by: Howard Chu <howardchu95@gmail.com> Link: https://lore.kernel.org/r/20250122025519.361873-1-howardchu95@gmail.com Signed-off-by: Namhyung Kim <namhyung@kernel.org>

queue->state_change is set as part of nvmet_tcp_set_queue_sock(), but if the TCP connection isn't established when nvmet_tcp_set_queue_sock() is called then queue->state_change isn't set and sock->sk->sk_state_change isn't replaced. As such we don't need to restore sock->sk->sk_state_change if queue->state_change is NULL. This avoids NULL pointer dereferences such as this: [ 286.462026][ C0] BUG: kernel NULL pointer dereference, address: 0000000000000000 [ 286.462814][ C0] #PF: supervisor instruction fetch in kernel mode [ 286.463796][ C0] #PF: error_code(0x0010) - not-present page [ 286.464392][ C0] PGD 8000000140620067 P4D 8000000140620067 PUD 114201067 PMD 0 [ 286.465086][ C0] Oops: Oops: 0010 [#1] SMP KASAN PTI [ 286.465559][ C0] CPU: 0 UID: 0 PID: 1628 Comm: nvme Not tainted 6.15.0-rc2+ #11 PREEMPT(voluntary) [ 286.466393][ C0] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.3-3.fc41 04/01/2014 [ 286.467147][ C0] RIP: 0010:0x0 [ 286.467420][ C0] Code: Unable to access opcode bytes at 0xffffffffffffffd6. [ 286.467977][ C0] RSP: 0018:ffff8883ae008580 EFLAGS: 00010246 [ 286.468425][ C0] RAX: 0000000000000000 RBX: ffff88813fd34100 RCX: ffffffffa386cc43 [ 286.469019][ C0] RDX: 1ffff11027fa68b6 RSI: 0000000000000008 RDI: ffff88813fd34100 [ 286.469545][ C0] RBP: ffff88813fd34160 R08: 0000000000000000 R09: ffffed1027fa682c [ 286.470072][ C0] R10: ffff88813fd34167 R11: 0000000000000000 R12: ffff88813fd344c3 [ 286.470585][ C0] R13: ffff88813fd34112 R14: ffff88813fd34aec R15: ffff888132cdd268 [ 286.471070][ C0] FS: 00007fe3c04c7d80(0000) GS:ffff88840743f000(0000) knlGS:0000000000000000 [ 286.471644][ C0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 286.472543][ C0] CR2: ffffffffffffffd6 CR3: 000000012daca000 CR4: 00000000000006f0 [ 286.473500][ C0] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 286.474467][ C0] DR3: 0000000000000000 DR6: 00000000ffff07f0 DR7: 0000000000000400 [ 286.475453][ C0] Call Trace: [ 286.476102][ C0] <IRQ> [ 286.476719][ C0] tcp_fin+0x2bb/0x440 [ 286.477429][ C0] tcp_data_queue+0x190f/0x4e60 [ 286.478174][ C0] ? __build_skb_around+0x234/0x330 [ 286.478940][ C0] ? rcu_is_watching+0x11/0xb0 [ 286.479659][ C0] ? __pfx_tcp_data_queue+0x10/0x10 [ 286.480431][ C0] ? tcp_try_undo_loss+0x640/0x6c0 [ 286.481196][ C0] ? seqcount_lockdep_reader_access.constprop.0+0x82/0x90 [ 286.482046][ C0] ? kvm_clock_get_cycles+0x14/0x30 [ 286.482769][ C0] ? ktime_get+0x66/0x150 [ 286.483433][ C0] ? rcu_is_watching+0x11/0xb0 [ 286.484146][ C0] tcp_rcv_established+0x6e4/0x2050 [ 286.484857][ C0] ? rcu_is_watching+0x11/0xb0 [ 286.485523][ C0] ? ipv4_dst_check+0x160/0x2b0 [ 286.486203][ C0] ? __pfx_tcp_rcv_established+0x10/0x10 [ 286.486917][ C0] ? lock_release+0x217/0x2c0 [ 286.487595][ C0] tcp_v4_do_rcv+0x4d6/0x9b0 [ 286.488279][ C0] tcp_v4_rcv+0x2af8/0x3e30 [ 286.488904][ C0] ? raw_local_deliver+0x51b/0xad0 [ 286.489551][ C0] ? rcu_is_watching+0x11/0xb0 [ 286.490198][ C0] ? __pfx_tcp_v4_rcv+0x10/0x10 [ 286.490813][ C0] ? __pfx_raw_local_deliver+0x10/0x10 [ 286.491487][ C0] ? __pfx_nf_confirm+0x10/0x10 [nf_conntrack] [ 286.492275][ C0] ? rcu_is_watching+0x11/0xb0 [ 286.492900][ C0] ip_protocol_deliver_rcu+0x8f/0x370 [ 286.493579][ C0] ip_local_deliver_finish+0x297/0x420 [ 286.494268][ C0] ip_local_deliver+0x168/0x430 [ 286.494867][ C0] ? __pfx_ip_local_deliver+0x10/0x10 [ 286.495498][ C0] ? __pfx_ip_local_deliver_finish+0x10/0x10 [ 286.496204][ C0] ? ip_rcv_finish_core+0x19a/0x1f20 [ 286.496806][ C0] ? lock_release+0x217/0x2c0 [ 286.497414][ C0] ip_rcv+0x455/0x6e0 [ 286.497945][ C0] ? __pfx_ip_rcv+0x10/0x10 [ 286.498550][ C0] ? rcu_is_watching+0x11/0xb0 [ 286.499137][ C0] ? __pfx_ip_rcv_finish+0x10/0x10 [ 286.499763][ C0] ? lock_release+0x217/0x2c0 [ 286.500327][ C0] ? dl_scaled_delta_exec+0xd1/0x2c0 [ 286.500922][ C0] ? __pfx_ip_rcv+0x10/0x10 [ 286.501480][ C0] __netif_receive_skb_one_core+0x166/0x1b0 [ 286.502173][ C0] ? __pfx___netif_receive_skb_one_core+0x10/0x10 [ 286.502903][ C0] ? lock_acquire+0x2b2/0x310 [ 286.503487][ C0] ? process_backlog+0x372/0x1350 [ 286.504087][ C0] ? lock_release+0x217/0x2c0 [ 286.504642][ C0] process_backlog+0x3b9/0x1350 [ 286.505214][ C0] ? process_backlog+0x372/0x1350 [ 286.505779][ C0] __napi_poll.constprop.0+0xa6/0x490 [ 286.506363][ C0] net_rx_action+0x92e/0xe10 [ 286.506889][ C0] ? __pfx_net_rx_action+0x10/0x10 [ 286.507437][ C0] ? timerqueue_add+0x1f0/0x320 [ 286.507977][ C0] ? sched_clock_cpu+0x68/0x540 [ 286.508492][ C0] ? lock_acquire+0x2b2/0x310 [ 286.509043][ C0] ? kvm_sched_clock_read+0xd/0x20 [ 286.509607][ C0] ? handle_softirqs+0x1aa/0x7d0 [ 286.510187][ C0] handle_softirqs+0x1f2/0x7d0 [ 286.510754][ C0] ? __pfx_handle_softirqs+0x10/0x10 [ 286.511348][ C0] ? irqtime_account_irq+0x181/0x290 [ 286.511937][ C0] ? __dev_queue_xmit+0x85d/0x3450 [ 286.512510][ C0] do_softirq.part.0+0x89/0xc0 [ 286.513100][ C0] </IRQ> [ 286.513548][ C0] <TASK> [ 286.513953][ C0] __local_bh_enable_ip+0x112/0x140 [ 286.514522][ C0] ? __dev_queue_xmit+0x85d/0x3450 [ 286.515072][ C0] __dev_queue_xmit+0x872/0x3450 [ 286.515619][ C0] ? nft_do_chain+0xe16/0x15b0 [nf_tables] [ 286.516252][ C0] ? __pfx___dev_queue_xmit+0x10/0x10 [ 286.516817][ C0] ? selinux_ip_postroute+0x43c/0xc50 [ 286.517433][ C0] ? __pfx_selinux_ip_postroute+0x10/0x10 [ 286.518061][ C0] ? rcu_is_watching+0x11/0xb0 [ 286.518606][ C0] ? ip_output+0x164/0x4a0 [ 286.519149][ C0] ? rcu_is_watching+0x11/0xb0 [ 286.519671][ C0] ? ip_finish_output2+0x17d5/0x1fb0 [ 286.520258][ C0] ip_finish_output2+0xb4b/0x1fb0 [ 286.520787][ C0] ? __pfx_ip_finish_output2+0x10/0x10 [ 286.521355][ C0] ? __ip_finish_output+0x15d/0x750 [ 286.521890][ C0] ip_output+0x164/0x4a0 [ 286.522372][ C0] ? __pfx_ip_output+0x10/0x10 [ 286.522872][ C0] ? rcu_is_watching+0x11/0xb0 [ 286.523402][ C0] ? _raw_spin_unlock_irqrestore+0x4c/0x60 [ 286.524031][ C0] ? __pfx_ip_finish_output+0x10/0x10 [ 286.524605][ C0] ? __ip_queue_xmit+0x999/0x2260 [ 286.525200][ C0] ? rcu_is_watching+0x11/0xb0 [ 286.525744][ C0] ? ipv4_dst_check+0x16a/0x2b0 [ 286.526279][ C0] ? lock_release+0x217/0x2c0 [ 286.526793][ C0] __ip_queue_xmit+0x1883/0x2260 [ 286.527324][ C0] ? __skb_clone+0x54c/0x730 [ 286.527827][ C0] __tcp_transmit_skb+0x209b/0x37a0 [ 286.528374][ C0] ? __pfx___tcp_transmit_skb+0x10/0x10 [ 286.528952][ C0] ? rcu_is_watching+0x11/0xb0 [ 286.529472][ C0] ? seqcount_lockdep_reader_access.constprop.0+0x82/0x90 [ 286.530152][ C0] ? trace_hardirqs_on+0x12/0x120 [ 286.530691][ C0] tcp_write_xmit+0xb81/0x88b0 [ 286.531224][ C0] ? mod_memcg_state+0x4d/0x60 [ 286.531736][ C0] ? rcu_is_watching+0x11/0xb0 [ 286.532253][ C0] __tcp_push_pending_frames+0x90/0x320 [ 286.532826][ C0] tcp_send_fin+0x141/0xb50 [ 286.533352][ C0] ? __pfx_tcp_send_fin+0x10/0x10 [ 286.533908][ C0] ? __local_bh_enable_ip+0xab/0x140 [ 286.534495][ C0] inet_shutdown+0x243/0x320 [ 286.535077][ C0] nvme_tcp_alloc_queue+0xb3b/0x2590 [nvme_tcp] [ 286.535709][ C0] ? do_raw_spin_lock+0x129/0x260 [ 286.536314][ C0] ? __pfx_nvme_tcp_alloc_queue+0x10/0x10 [nvme_tcp] [ 286.536996][ C0] ? do_raw_spin_unlock+0x54/0x1e0 [ 286.537550][ C0] ? _raw_spin_unlock+0x29/0x50 [ 286.538127][ C0] ? do_raw_spin_lock+0x129/0x260 [ 286.538664][ C0] ? __pfx_do_raw_spin_lock+0x10/0x10 [ 286.539249][ C0] ? nvme_tcp_alloc_admin_queue+0xd5/0x340 [nvme_tcp] [ 286.539892][ C0] ? __wake_up+0x40/0x60 [ 286.540392][ C0] nvme_tcp_alloc_admin_queue+0xd5/0x340 [nvme_tcp] [ 286.541047][ C0] ? rcu_is_watching+0x11/0xb0 [ 286.541589][ C0] nvme_tcp_setup_ctrl+0x8b/0x7a0 [nvme_tcp] [ 286.542254][ C0] ? _raw_spin_unlock_irqrestore+0x4c/0x60 [ 286.542887][ C0] ? __pfx_nvme_tcp_setup_ctrl+0x10/0x10 [nvme_tcp] [ 286.543568][ C0] ? trace_hardirqs_on+0x12/0x120 [ 286.544166][ C0] ? _raw_spin_unlock_irqrestore+0x35/0x60 [ 286.544792][ C0] ? nvme_change_ctrl_state+0x196/0x2e0 [nvme_core] [ 286.545477][ C0] nvme_tcp_create_ctrl+0x839/0xb90 [nvme_tcp] [ 286.546126][ C0] nvmf_dev_write+0x3db/0x7e0 [nvme_fabrics] [ 286.546775][ C0] ? rw_verify_area+0x69/0x520 [ 286.547334][ C0] vfs_write+0x218/0xe90 [ 286.547854][ C0] ? do_syscall_64+0x9f/0x190 [ 286.548408][ C0] ? trace_hardirqs_on_prepare+0xdb/0x120 [ 286.549037][ C0] ? syscall_exit_to_user_mode+0x93/0x280 [ 286.549659][ C0] ? __pfx_vfs_write+0x10/0x10 [ 286.550259][ C0] ? do_syscall_64+0x9f/0x190 [ 286.550840][ C0] ? syscall_exit_to_user_mode+0x8e/0x280 [ 286.551516][ C0] ? trace_hardirqs_on_prepare+0xdb/0x120 [ 286.552180][ C0] ? syscall_exit_to_user_mode+0x93/0x280 [ 286.552834][ C0] ? ksys_read+0xf5/0x1c0 [ 286.553386][ C0] ? __pfx_ksys_read+0x10/0x10 [ 286.553964][ C0] ksys_write+0xf5/0x1c0 [ 286.554499][ C0] ? __pfx_ksys_write+0x10/0x10 [ 286.555072][ C0] ? trace_hardirqs_on_prepare+0xdb/0x120 [ 286.555698][ C0] ? syscall_exit_to_user_mode+0x93/0x280 [ 286.556319][ C0] ? do_syscall_64+0x54/0x190 [ 286.556866][ C0] do_syscall_64+0x93/0x190 [ 286.557420][ C0] ? rcu_read_unlock+0x17/0x60 [ 286.557986][ C0] ? rcu_is_watching+0x11/0xb0 [ 286.558526][ C0] ? lock_release+0x217/0x2c0 [ 286.559087][ C0] ? rcu_is_watching+0x11/0xb0 [ 286.559659][ C0] ? count_memcg_events.constprop.0+0x4a/0x60 [ 286.560476][ C0] ? exc_page_fault+0x7a/0x110 [ 286.561064][ C0] ? rcu_is_watching+0x11/0xb0 [ 286.561647][ C0] ? lock_release+0x217/0x2c0 [ 286.562257][ C0] ? do_user_addr_fault+0x171/0xa00 [ 286.562839][ C0] ? do_user_addr_fault+0x4a2/0xa00 [ 286.563453][ C0] ? irqentry_exit_to_user_mode+0x84/0x270 [ 286.564112][ C0] ? rcu_is_watching+0x11/0xb0 [ 286.564677][ C0] ? irqentry_exit_to_user_mode+0x84/0x270 [ 286.565317][ C0] ? trace_hardirqs_on_prepare+0xdb/0x120 [ 286.565922][ C0] entry_SYSCALL_64_after_hwframe+0x76/0x7e [ 286.566542][ C0] RIP: 0033:0x7fe3c05e6504 [ 286.567102][ C0] Code: c7 00 16 00 00 00 b8 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 f3 0f 1e fa 80 3d c5 8b 10 00 00 74 13 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 54 c3 0f 1f 00 55 48 89 e5 48 83 ec 20 48 89 [ 286.568931][ C0] RSP: 002b:00007fff76444f58 EFLAGS: 00000202 ORIG_RAX: 0000000000000001 [ 286.569807][ C0] RAX: ffffffffffffffda RBX: 000000003b40d930 RCX: 00007fe3c05e6504 [ 286.570621][ C0] RDX: 00000000000000cf RSI: 000000003b40d930 RDI: 0000000000000003 [ 286.571443][ C0] RBP: 0000000000000003 R08: 00000000000000cf R09: 000000003b40d930 [ 286.572246][ C0] R10: 0000000000000000 R11: 0000000000000202 R12: 000000003b40cd60 [ 286.573069][ C0] R13: 00000000000000cf R14: 00007fe3c07417f8 R15: 00007fe3c073502e [ 286.573886][ C0] </TASK> Closes: https://lore.kernel.org/linux-nvme/5hdonndzoqa265oq3bj6iarwtfk5dewxxjtbjvn5uqnwclpwt6@a2n6w3taxxex/ Signed-off-by: Alistair Francis <alistair.francis@wdc.com> Reviewed-by: Sagi Grimberg <sagi@grimberg.me> Tested-by: Shin'ichiro Kawasaki <shinichiro.kawasaki@wdc.com> Signed-off-by: Christoph Hellwig <hch@lst.de>

… prevent wrong idmap generation The PTE_MAYBE_NG macro sets the nG page table bit according to the value of "arm64_use_ng_mappings". This variable is currently placed in the .bss section. create_init_idmap() is called before the .bss section initialisation which is done in early_map_kernel(). Therefore, data/test_prot in create_init_idmap() could be set incorrectly through the PAGE_KERNEL -> PROT_DEFAULT -> PTE_MAYBE_NG macros. # llvm-objdump-21 --syms vmlinux-gcc | grep arm64_use_ng_mappings ffff800082f242a8 g O .bss 0000000000000001 arm64_use_ng_mappings The create_init_idmap() function disassembly compiled with llvm-21: // create_init_idmap() ffff80008255c058: d10103f sub sp, sp, #0x40 ffff80008255c05c: a9017bfd stp x29, x30, [sp, #0x10] ffff80008255c060: a90257f6 stp x22, x21, [sp, #0x20] ffff80008255c064: a9034ff4 stp x20, x19, [sp, #0x30] ffff80008255c068: 910043fd add x29, sp, #0x10 ffff80008255c06c: 90003fc8 adrp x8, 0xffff800082d54000 ffff80008255c070: d280e06a mov x10, #0x703 // =1795 ffff80008255c074: 91400409 add x9, x0, #0x1, lsl #12 // =0x1000 ffff80008255c078: 394a4108 ldrb w8, [x8, #0x290] ------------- (1) ffff80008255c07c: f2e00d0a movk x10, #0x68, lsl #48 ffff80008255c080: f90007e9 str x9, [sp, #0x8] ffff80008255c084: aa0103f3 mov x19, x1 ffff80008255c088: aa0003f4 mov x20, x0 ffff80008255c08c: 14000000 b 0xffff80008255c08c <__pi_create_init_idmap+0x34> ffff80008255c090: aa082d56 orr x22, x10, x8, lsl #11 -------- (2) Note (1) is loading the arm64_use_ng_mappings value in w8 and (2) is set the text or data prot with the w8 value to set PTE_NG bit. If the .bss section isn't initialized, x8 could include a garbage value and generate an incorrect mapping. Annotate arm64_use_ng_mappings as __read_mostly so that it is placed in the .data section. Fixes: 84b04d3 ("arm64: kernel: Create initial ID map from C code") Cc: stable@vger.kernel.org # 6.9.x Tested-by: Nathan Chancellor <nathan@kernel.org> Signed-off-by: Yeoreum Yun <yeoreum.yun@arm.com> Link: https://lore.kernel.org/r/20250502180412.3774883-1-yeoreum.yun@arm.com [catalin.marinas@arm.com: use __read_mostly instead of __ro_after_init] [catalin.marinas@arm.com: slight tweaking of the code comment] Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>

…th() KASAN reports a stack-out-of-bounds read in regs_get_kernel_stack_nth(). Call Trace: [ 97.283505] BUG: KASAN: stack-out-of-bounds in regs_get_kernel_stack_nth+0xa8/0xc8 [ 97.284677] Read of size 8 at addr ffff800089277c10 by task 1.sh/2550 [ 97.285732] [ 97.286067] CPU: 7 PID: 2550 Comm: 1.sh Not tainted 6.6.0+ #11 [ 97.287032] Hardware name: linux,dummy-virt (DT) [ 97.287815] Call trace: [ 97.288279] dump_backtrace+0xa0/0x128 [ 97.288946] show_stack+0x20/0x38 [ 97.289551] dump_stack_lvl+0x78/0xc8 [ 97.290203] print_address_description.constprop.0+0x84/0x3c8 [ 97.291159] print_report+0xb0/0x280 [ 97.291792] kasan_report+0x84/0xd0 [ 97.292421] __asan_load8+0x9c/0xc0 [ 97.293042] regs_get_kernel_stack_nth+0xa8/0xc8 [ 97.293835] process_fetch_insn+0x770/0xa30 [ 97.294562] kprobe_trace_func+0x254/0x3b0 [ 97.295271] kprobe_dispatcher+0x98/0xe0 [ 97.295955] kprobe_breakpoint_handler+0x1b0/0x210 [ 97.296774] call_break_hook+0xc4/0x100 [ 97.297451] brk_handler+0x24/0x78 [ 97.298073] do_debug_exception+0xac/0x178 [ 97.298785] el1_dbg+0x70/0x90 [ 97.299344] el1h_64_sync_handler+0xcc/0xe8 [ 97.300066] el1h_64_sync+0x78/0x80 [ 97.300699] kernel_clone+0x0/0x500 [ 97.301331] __arm64_sys_clone+0x70/0x90 [ 97.302084] invoke_syscall+0x68/0x198 [ 97.302746] el0_svc_common.constprop.0+0x11c/0x150 [ 97.303569] do_el0_svc+0x38/0x50 [ 97.304164] el0_svc+0x44/0x1d8 [ 97.304749] el0t_64_sync_handler+0x100/0x130 [ 97.305500] el0t_64_sync+0x188/0x190 [ 97.306151] [ 97.306475] The buggy address belongs to stack of task 1.sh/2550 [ 97.307461] and is located at offset 0 in frame: [ 97.308257] __se_sys_clone+0x0/0x138 [ 97.308910] [ 97.309241] This frame has 1 object: [ 97.309873] [48, 184) 'args' [ 97.309876] [ 97.310749] The buggy address belongs to the virtual mapping at [ 97.310749] [ffff800089270000, ffff800089279000) created by: [ 97.310749] dup_task_struct+0xc0/0x2e8 [ 97.313347] [ 97.313674] The buggy address belongs to the physical page: [ 97.314604] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x14f69a [ 97.315885] flags: 0x15ffffe00000000(node=1|zone=2|lastcpupid=0xfffff) [ 97.316957] raw: 015ffffe00000000 0000000000000000 dead000000000122 0000000000000000 [ 97.318207] raw: 0000000000000000 0000000000000000 00000001ffffffff 0000000000000000 [ 97.319445] page dumped because: kasan: bad access detected [ 97.320371] [ 97.320694] Memory state around the buggy address: [ 97.321511] ffff800089277b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 97.322681] ffff800089277b80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 97.323846] >ffff800089277c00: 00 00 f1 f1 f1 f1 f1 f1 00 00 00 00 00 00 00 00 [ 97.325023] ^ [ 97.325683] ffff800089277c80: 00 00 00 00 00 00 00 00 00 f3 f3 f3 f3 f3 f3 f3 [ 97.326856] ffff800089277d00: f3 f3 00 00 00 00 00 00 00 00 00 00 00 00 00 00 This issue seems to be related to the behavior of some gcc compilers and was also fixed on the s390 architecture before: commit d93a855 ("s390/ptrace: Avoid KASAN false positives in regs_get_kernel_stack_nth()") As described in that commit, regs_get_kernel_stack_nth() has confirmed that `addr` is on the stack, so reading the value at `*addr` should be allowed. Use READ_ONCE_NOCHECK() helper to silence the KASAN check for this case. Fixes: 0a8ea52 ("arm64: Add HAVE_REGS_AND_STACK_ACCESS_API feature") Signed-off-by: Tengda Wu <wutengda@huaweicloud.com> Link: https://lore.kernel.org/r/20250604005533.1278992-1-wutengda@huaweicloud.com [will: Use '*addr' as the argument to READ_ONCE_NOCHECK()] Signed-off-by: Will Deacon <will@kernel.org>

Since commit 6b9f29b ("riscv: Enable pcpu page first chunk allocator"), if NUMA is enabled, the page percpu allocator may be used on very sparse configurations, or when requested on boot with percpu_alloc=page. In that case, percpu data gets put in the vmalloc area. However, sbi_hsm_hart_start() needs the physical address of a sbi_hart_boot_data, and simply assumes that __pa() would work. This causes the just started hart to immediately access an invalid address and hang. Fortunately, struct sbi_hart_boot_data is not too large, so we can simply allocate an array for boot_data statically, putting it in the kernel image. This fixes NUMA=y SMP boot on Sophgo SG2042. To reproduce on QEMU: Set CONFIG_NUMA=y and CONFIG_DEBUG_VIRTUAL=y, then run with: qemu-system-riscv64 -M virt -smp 2 -nographic \ -kernel arch/riscv/boot/Image \ -append "percpu_alloc=page" Kernel output: [ 0.000000] Booting Linux on hartid 0 [ 0.000000] Linux version 6.16.0-rc1 (dram@sakuya) (riscv64-unknown-linux-gnu-gcc (GCC) 14.2.1 20250322, GNU ld (GNU Binutils) 2.44) #11 SMP Tue Jun 24 14:56:22 CST 2025 ... [ 0.000000] percpu: 28 4K pages/cpu s85784 r8192 d20712 ... [ 0.083192] smp: Bringing up secondary CPUs ... [ 0.086722] ------------[ cut here ]------------ [ 0.086849] virt_to_phys used for non-linear address: (____ptrval____) (0xff2000000001d080) [ 0.088001] WARNING: CPU: 0 PID: 1 at arch/riscv/mm/physaddr.c:14 __virt_to_phys+0xae/0xe8 [ 0.088376] Modules linked in: [ 0.088656] CPU: 0 UID: 0 PID: 1 Comm: swapper/0 Not tainted 6.16.0-rc1 #11 NONE [ 0.088833] Hardware name: riscv-virtio,qemu (DT) [ 0.088948] epc : __virt_to_phys+0xae/0xe8 [ 0.089001] ra : __virt_to_phys+0xae/0xe8 [ 0.089037] epc : ffffffff80021eaa ra : ffffffff80021eaa sp : ff2000000004bbc0 [ 0.089057] gp : ffffffff817f49c0 tp : ff60000001d60000 t0 : 5f6f745f74726976 [ 0.089076] t1 : 0000000000000076 t2 : 705f6f745f747269 s0 : ff2000000004bbe0 [ 0.089095] s1 : ff2000000001d080 a0 : 0000000000000000 a1 : 0000000000000000 [ 0.089113] a2 : 0000000000000000 a3 : 0000000000000000 a4 : 0000000000000000 [ 0.089131] a5 : 0000000000000000 a6 : 0000000000000000 a7 : 0000000000000000 [ 0.089155] s2 : ffffffff8130dc00 s3 : 0000000000000001 s4 : 0000000000000001 [ 0.089174] s5 : ffffffff8185eff8 s6 : ff2000007f1eb000 s7 : ffffffff8002a2ec [ 0.089193] s8 : 0000000000000001 s9 : 0000000000000001 s10: 0000000000000000 [ 0.089211] s11: 0000000000000000 t3 : ffffffff8180a9f7 t4 : ffffffff8180a9f7 [ 0.089960] t5 : ffffffff8180a9f8 t6 : ff2000000004b9d8 [ 0.089984] status: 0000000200000120 badaddr: ffffffff80021eaa cause: 0000000000000003 [ 0.090101] [<ffffffff80021eaa>] __virt_to_phys+0xae/0xe8 [ 0.090228] [<ffffffff8001d796>] sbi_cpu_start+0x6e/0xe8 [ 0.090247] [<ffffffff8001a5da>] __cpu_up+0x1e/0x8c [ 0.090260] [<ffffffff8002a32e>] bringup_cpu+0x42/0x258 [ 0.090277] [<ffffffff8002914c>] cpuhp_invoke_callback+0xe0/0x40c [ 0.090292] [<ffffffff800294e0>] __cpuhp_invoke_callback_range+0x68/0xfc [ 0.090320] [<ffffffff8002a96a>] _cpu_up+0x11a/0x244 [ 0.090334] [<ffffffff8002aae6>] cpu_up+0x52/0x90 [ 0.090384] [<ffffffff80c09350>] bringup_nonboot_cpus+0x78/0x118 [ 0.090411] [<ffffffff80c11060>] smp_init+0x34/0xb8 [ 0.090425] [<ffffffff80c01220>] kernel_init_freeable+0x148/0x2e4 [ 0.090442] [<ffffffff80b83802>] kernel_init+0x1e/0x14c [ 0.090455] [<ffffffff800124ca>] ret_from_fork_kernel+0xe/0xf0 [ 0.090471] [<ffffffff80b8d9c2>] ret_from_fork_kernel_asm+0x16/0x18 [ 0.090560] ---[ end trace 0000000000000000 ]--- [ 1.179875] CPU1: failed to come online [ 1.190324] smp: Brought up 1 node, 1 CPU Cc: stable@vger.kernel.org Reported-by: Han Gao <rabenda.cn@gmail.com> Fixes: 6b9f29b ("riscv: Enable pcpu page first chunk allocator") Reviewed-by: Alexandre Ghiti <alexghiti@rivosinc.com> Tested-by: Alexandre Ghiti <alexghiti@rivosinc.com> Signed-off-by: Vivian Wang <wangruikang@iscas.ac.cn> Link: https://lore.kernel.org/r/20250624-riscv-hsm-boot-data-array-v1-1-50b5eeafbe61@iscas.ac.cn Signed-off-by: Alexandre Ghiti <alexghiti@rivosinc.com>

Commit 4e65bda ("ASoC: wcd934x: fix error handling in wcd934x_codec_parse_data()") revealed the problem in the slimbus regmap. That commit breaks audio playback, for instance, on sdm845 Thundercomm Dragonboard 845c board: Unable to handle kernel paging request at virtual address ffff8000847cbad4 ... CPU: 5 UID: 0 PID: 776 Comm: aplay Not tainted 6.18.0-rc1-00028-g7ea30958b305 #11 PREEMPT Hardware name: Thundercomm Dragonboard 845c (DT) ... Call trace: slim_xfer_msg+0x24/0x1ac [slimbus] (P) slim_read+0x48/0x74 [slimbus] regmap_slimbus_read+0x18/0x24 [regmap_slimbus] _regmap_raw_read+0xe8/0x174 _regmap_bus_read+0x44/0x80 _regmap_read+0x60/0xd8 _regmap_update_bits+0xf4/0x140 _regmap_select_page+0xa8/0x124 _regmap_raw_write_impl+0x3b8/0x65c _regmap_bus_raw_write+0x60/0x80 _regmap_write+0x58/0xc0 regmap_write+0x4c/0x80 wcd934x_hw_params+0x494/0x8b8 [snd_soc_wcd934x] snd_soc_dai_hw_params+0x3c/0x7c [snd_soc_core] __soc_pcm_hw_params+0x22c/0x634 [snd_soc_core] dpcm_be_dai_hw_params+0x1d4/0x38c [snd_soc_core] dpcm_fe_dai_hw_params+0x9c/0x17c [snd_soc_core] snd_pcm_hw_params+0x124/0x464 [snd_pcm] snd_pcm_common_ioctl+0x110c/0x1820 [snd_pcm] snd_pcm_ioctl+0x34/0x4c [snd_pcm] __arm64_sys_ioctl+0xac/0x104 invoke_syscall+0x48/0x104 el0_svc_common.constprop.0+0x40/0xe0 do_el0_svc+0x1c/0x28 el0_svc+0x34/0xec el0t_64_sync_handler+0xa0/0xf0 el0t_64_sync+0x198/0x19c The __devm_regmap_init_slimbus() started to be used instead of __regmap_init_slimbus() after the commit mentioned above and turns out the incorrect bus_context pointer (3rd argument) was used in __devm_regmap_init_slimbus(). It should be just "slimbus" (which is equal to &slimbus->dev). Correct it. The wcd934x codec seems to be the only or the first user of devm_regmap_init_slimbus() but we should fix it till the point where __devm_regmap_init_slimbus() was introduced therefore two "Fixes" tags. While at this, also correct the same argument in __regmap_init_slimbus(). Fixes: 4e65bda ("ASoC: wcd934x: fix error handling in wcd934x_codec_parse_data()") Fixes: 7d6f7fb ("regmap: add SLIMbus support") Cc: stable@vger.kernel.org Cc: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com> Cc: Ma Ke <make24@iscas.ac.cn> Cc: Steev Klimaszewski <steev@kali.org> Cc: Srinivas Kandagatla <srini@kernel.org> Reviewed-by: Abel Vesa <abel.vesa@linaro.org> Signed-off-by: Alexey Klimov <alexey.klimov@linaro.org> Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com> Link: https://patch.msgid.link/20251022201013.1740211-1-alexey.klimov@linaro.org Signed-off-by: Mark Brown <broonie@kernel.org>

modules-kpd-app bot added modules-next new V2 labels Oct 16, 2024

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adding ci files

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modules-kpd-app bot force-pushed the modules-next_base branch from 5071b4f to 18e1a8e Compare October 29, 2024 23:34

modules-kpd-app bot force-pushed the series/899819=>modules-next branch from 3255a10 to 007267a Compare October 29, 2024 23:35

modules-kpd-app bot force-pushed the modules-next_base branch from 18e1a8e to f496cd0 Compare November 1, 2024 21:31

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modules-kpd-app bot deleted the series/899819=>modules-next branch November 1, 2024 21:32

module: sign with sha512 instead of sha1 by default #11

module: sign with sha512 instead of sha1 by default #11

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