NULL pointer dereference after running dtrace script (linux 3.10) #61
Description
Trying to run dtrace on PID, using dtrace script, and when function that I've trace entered/leaved get next error in kern.log, and after this PID is killed by: "Trace/breakpoint trap"
Don't pay attention to 2-6-39 it is just host name.
And also this one is after applying #60
But I don't event try to read /proc/dtrace/*, so that patchset mustn't affect this bug.
And BTW I have the same issue as in #58 when compiling (maybe this can affect)
Jul 21 12:56:02 debian-virtual-2-6-39 kernel: [ 103.067716] CPU: 0 PID: 3110 Comm: boostcached Tainted: P W O 3.11.0-rc1+ #21
Jul 21 12:56:02 debian-virtual-2-6-39 kernel: [ 103.069988] Hardware name: innotek GmbH VirtualBox/VirtualBox, BIOS VirtualBox 12/01/2006
Jul 21 12:56:02 debian-virtual-2-6-39 kernel: [ 103.071585] 0000000000000000 ffff8800370d9460 ffffffff813689a2 ffff8800370d9460
Jul 21 12:56:02 debian-virtual-2-6-39 kernel: [ 103.071585] ffffffffa0353dc4 ffff8800370d9460 ffff8800370d9460 ffff88007fc09f58
Jul 21 12:56:02 debian-virtual-2-6-39 kernel: [ 103.071585] 0000000000000000 ffffffffa039be20 ffffffffa039be78 ffffffffa034a5ca
Jul 21 12:56:02 debian-virtual-2-6-39 kernel: [ 103.071585] ffffffffa0353dc4 ffff8800370d9460 ffff8800370d9460 ffff88007fc09f58 [0/160]
Jul 21 12:56:02 debian-virtual-2-6-39 kernel: [ 103.071585] 0000000000000000 ffffffffa039be20 ffffffffa039be78 ffffffffa034a5ca
Jul 21 12:56:02 debian-virtual-2-6-39 kernel: [ 103.071585] Call Trace:
Jul 21 12:56:02 debian-virtual-2-6-39 kernel: [ 103.071585] <#DB> [<ffffffff813689a2>] ? dump_stack+0x41/0x51
Jul 21 12:56:02 debian-virtual-2-6-39 kernel: [ 103.071585] [<ffffffffa0353dc4>] ? mutex_enter_common+0x29/0xd7 [dtracedrv]
Jul 21 12:56:02 debian-virtual-2-6-39 kernel: [ 103.071585] [<ffffffffa034a5ca>] ? rw_enter+0x10/0x4b [dtracedrv]
Jul 21 12:56:02 debian-virtual-2-6-39 kernel: [ 103.071585] [<ffffffffa034af6e>] ? dtrace_user_probe+0x198/0x2a6 [dtracedrv]
Jul 21 12:56:02 debian-virtual-2-6-39 kernel: [ 103.071585] [<ffffffffa0352c89>] ? dtrace_int3_handler+0x111/0x201 [dtracedrv]
Jul 21 12:56:02 debian-virtual-2-6-39 kernel: [ 103.071585] [<ffffffffa03534cd>] ? dtrace_int3+0x3a/0x8f [dtracedrv]
Jul 21 12:56:02 debian-virtual-2-6-39 kernel: [ 103.071585] <<EOE>>
Jul 21 12:56:02 debian-virtual-2-6-39 kernel: [ 103.092483] traps: boostcached[3110] trap int3 ip:4fc157 sp:7f9b14081758 error:0
Jul 21 12:56:02 debian-virtual-2-6-39 kernel: [ 103.094567] BUG: unable to handle kernel NULL pointer dereference at (null)
Jul 21 12:56:02 debian-virtual-2-6-39 kernel: [ 103.098015] IP: [< (null)>] (null)
Jul 21 12:56:02 debian-virtual-2-6-39 kernel: [ 103.098512] PGD 36d59067 PUD 7cadf067 PMD 0
Jul 21 12:56:02 debian-virtual-2-6-39 kernel: [ 103.098512] Oops: 0010 [#1] SMP
Jul 21 12:56:02 debian-virtual-2-6-39 kernel: [ 103.098512] Modules linked in: dtracedrv(PO) nfsd auth_rpcgss oid_registry nfs_acl nfs lockd fscache sunrpc loop fuse joydev hid_generic usbhid hid snd_pcm mperf snd_page_alloc snd_timer snd soundc
ore button processor psmouse thermal_sys pcspkr serio_raw ohci_pci ohci_hcd ehci_hcd usbcore microcode usb_common parport_pc i2c_piix4 parport i2c_core ac evdev ext4 crc16 jbd2 mbcache sg sr_mod cdrom sd_mod crc_t10dif ata_generic ata_piix ahci l
ibahci libata scsi_mod e1000
Jul 21 12:56:02 debian-virtual-2-6-39 kernel: [ 103.098512] CPU: 1 PID: 3108 Comm: boostcached Tainted: P W O 3.11.0-rc1+ #21
Jul 21 12:56:02 debian-virtual-2-6-39 kernel: [ 103.098512] Hardware name: innotek GmbH VirtualBox/VirtualBox, BIOS VirtualBox 12/01/2006
Jul 21 12:56:02 debian-virtual-2-6-39 kernel: [ 103.098512] task: ffff880037200180 ti: ffff880036c32000 task.ti: ffff880036c32000
Jul 21 12:56:02 debian-virtual-2-6-39 kernel: [ 103.098512] RIP: 0010:[<0000000000000000>] [< (null)>] (null)
Jul 21 12:56:02 debian-virtual-2-6-39 kernel: [ 103.098512] RSP: 0018:ffff880036c33ad8 EFLAGS: 00010246
Jul 21 12:56:02 debian-virtual-2-6-39 kernel: [ 103.098512] RAX: ffffffff8104beca RBX: ffff88007b557780 RCX: 0000000000000000
Jul 21 12:56:02 debian-virtual-2-6-39 kernel: [ 103.098512] RDX: 0000000000000001 RSI: ffff88007b557780 RDI: ffff8800370e0400
Jul 21 12:56:02 debian-virtual-2-6-39 kernel: [ 103.098512] RBP: ffff8800370e0400 R08: 00000000000000c0 R09: 0000000000000030
Jul 21 12:56:02 debian-virtual-2-6-39 kernel: [ 103.098512] R10: 0000000000000020 R11: 0000000000000020 R12: 0000000000000001
Jul 21 12:56:02 debian-virtual-2-6-39 kernel: [ 103.098512] R13: 0000000000000000 R14: ffffffffa034c971 R15: ffff880037200180
Jul 21 12:56:02 debian-virtual-2-6-39 kernel: [ 103.098512] FS: 00007f9b169f9740(0000) GS:ffff88007fd00000(0000) knlGS:0000000000000000
Jul 21 12:56:02 debian-virtual-2-6-39 kernel: [ 103.098512] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b
Jul 21 12:56:02 debian-virtual-2-6-39 kernel: [ 103.098512] CR2: 0000000000000000 CR3: 000000007abe0000 CR4: 00000000000006e0
Jul 21 12:56:02 debian-virtual-2-6-39 kernel: [ 103.098512] Stack:
Jul 21 12:56:02 debian-virtual-2-6-39 kernel: [ 103.098512] ffffffffa0358a0e ffffffffa034c971 0000000000000000 ffff880037200180
Jul 21 12:56:02 debian-virtual-2-6-39 kernel: [ 103.098512] 0000000000000000 0000000000000009 ffffffffa0358a9a 0000000000000001
Jul 21 12:56:02 debian-virtual-2-6-39 kernel: [ 103.098512] ffff880036c33bc8 ffff880036c33b50 ffffffffa034c95e ffffffffa034cd78
Jul 21 12:56:02 debian-virtual-2-6-39 kernel: [ 103.098512] Call Trace:
Jul 21 12:56:02 debian-virtual-2-6-39 kernel: [ 103.098512] [<ffffffffa0358a0e>] ? taskq_dispatch2+0xb4/0xc0 [dtracedrv]
Jul 21 12:56:02 debian-virtual-2-6-39 kernel: [ 103.098512] [<ffffffffa034c971>] ? fasttrap_pid_cleanup+0x78/0x78 [dtracedrv]
Jul 21 12:56:02 debian-virtual-2-6-39 kernel: [ 103.098512] [<ffffffffa0358a9a>] ? timeout+0x41/0x86 [dtracedrv]
Jul 21 12:56:02 debian-virtual-2-6-39 kernel: [ 103.098512] [<ffffffffa034c95e>] ? fasttrap_pid_cleanup+0x65/0x78 [dtracedrv]
Jul 21 12:56:02 debian-virtual-2-6-39 kernel: [ 103.098512] [<ffffffffa034cd78>] ? fasttrap_exec_exit+0x22/0x2c [dtracedrv]
Jul 21 12:56:02 debian-virtual-2-6-39 kernel: [ 103.098512] [<ffffffffa0349003>] ? proc_exit_notifier+0x57/0x6e [dtracedrv]
Jul 21 12:56:02 debian-virtual-2-6-39 kernel: [ 103.098512] [<ffffffff8136f9ad>] ? notifier_call_chain+0x2e/0x59
Jul 21 12:56:02 debian-virtual-2-6-39 kernel: [ 103.098512] [<ffffffff8105ab12>] ? should_resched+0x5/0x23
Jul 21 12:56:02 debian-virtual-2-6-39 kernel: [ 103.098512] [<ffffffff81055f83>] ? __blocking_notifier_call_chain+0x43/0x5d
Jul 21 12:56:02 debian-virtual-2-6-39 kernel: [ 103.098512] [<ffffffff8103a6d4>] ? do_exit+0x22/0x8ff
Jul 21 12:56:02 debian-virtual-2-6-39 kernel: [ 103.098512] [<ffffffff8103b0ba>] ? do_group_exit+0x67/0x99
Jul 21 12:56:02 debian-virtual-2-6-39 kernel: [ 103.098512] [<ffffffff810461e8>] ? get_signal_to_deliver+0x479/0x4ad
Jul 21 12:56:02 debian-virtual-2-6-39 kernel: [ 103.098512] [<ffffffff810da509>] ? sync_mm_rss+0x35/0x5f
Jul 21 12:56:02 debian-virtual-2-6-39 kernel: [ 103.098512] [<ffffffff8100209b>] ? do_signal+0x3c/0x434
Jul 21 12:56:02 debian-virtual-2-6-39 kernel: [ 103.098512] [<ffffffff81058874>] ? task_rq_unlock+0xf/0x23
Jul 21 12:56:02 debian-virtual-2-6-39 kernel: [ 103.098512] [<ffffffff8105d4ca>] ? wake_up_new_task+0xb7/0xd0
Jul 21 12:56:02 debian-virtual-2-6-39 kernel: [ 103.098512] [<ffffffff81079599>] ? SyS_futex+0x12e/0x161
Jul 21 12:56:02 debian-virtual-2-6-39 kernel: [ 103.098512] [<ffffffff810024b8>] ? do_notify_resume+0x25/0x68
Jul 21 12:56:02 debian-virtual-2-6-39 kernel: [ 103.098512] [<ffffffff81371dda>] ? int_signal+0x12/0x17
Jul 21 12:56:02 debian-virtual-2-6-39 kernel: [ 103.098512] Code: Bad RIP value.
Jul 21 12:56:02 debian-virtual-2-6-39 kernel: [ 103.098512] RIP [< (null)>] (null)
Jul 21 12:56:02 debian-virtual-2-6-39 kernel: [ 103.098512] RSP <ffff880036c33ad8>
Jul 21 12:56:02 debian-virtual-2-6-39 kernel: [ 103.098512] CR2: 0000000000000000
Jul 21 12:56:02 debian-virtual-2-6-39 kernel: [ 103.155460] ---[ end trace 0282fba058bae4eb ]---