INFO: task hung in blk_trace_remove

Status: auto-closed as invalid on 2020/07/14 22:05
Subsystems: block trace
[Documentation on labels]
Reported-by: syzbot+c07afbbb410e9f712273@syzkaller.appspotmail.com
First crash: 2431d, last: 2431d
▶ ▼ Discussions (1)
Title Replies (including bot) Last reply
INFO: task hung in blk_trace_remove 2 (3) 2020/03/23 17:12
▶ ▼ Similar bugs (3)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream INFO: task hung in blk_trace_remove (2) block trace 1 syz, C done done 73 31d 1021d 0/29 upstream: reported C repro on 2024/01/25 19:31
linux-6.6 INFO: task hung in blk_trace_remove origin:lts-only 1 syz inconclusive 1 127d 131d 0/2 upstream: reported syz repro on 2026/07/03 20:10
linux-4.19 INFO: task hung in blk_trace_remove 1 1 1697d 1697d 0/1 auto-closed as invalid on 2022/07/18 01:50

Sample crash report:
INFO: task syz-executor.4:7237 blocked for more than 143 seconds.
      Not tainted 5.6.0-rc6-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.4  D26576  7237   9609 0x00004004
Call Trace:
 schedule+0xd0/0x2a0 kernel/sched/core.c:4154
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:4213
 __mutex_lock_common kernel/locking/mutex.c:1033 [inline]
 __mutex_lock+0x7ab/0x13c0 kernel/locking/mutex.c:1103
 blk_trace_remove+0x1e/0x40 kernel/trace/blktrace.c:361
 sg_ioctl_common+0x221/0x2710 drivers/scsi/sg.c:1125
 sg_ioctl+0x8f/0x120 drivers/scsi/sg.c:1159
 vfs_ioctl fs/ioctl.c:47 [inline]
 ksys_ioctl+0x11a/0x180 fs/ioctl.c:763
 __do_sys_ioctl fs/ioctl.c:772 [inline]
 __se_sys_ioctl fs/ioctl.c:770 [inline]
 __x64_sys_ioctl+0x6f/0xb0 fs/ioctl.c:770
 do_syscall_64+0xf6/0x7d0 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x45c849
Code: Bad RIP value.
RSP: 002b:00007f5ba5a3bc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f5ba5a3c6d4 RCX: 000000000045c849
RDX: 0000000000000000 RSI: 0000000000001276 RDI: 0000000000000003
RBP: 000000000076bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 000000000000022b R14: 00000000004c4526 R15: 000000000076bf0c
INFO: task syz-executor.4:7266 blocked for more than 146 seconds.
      Not tainted 5.6.0-rc6-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.4  D27752  7266   9609 0x00004004
Call Trace:
 schedule+0xd0/0x2a0 kernel/sched/core.c:4154
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:4213
 __mutex_lock_common kernel/locking/mutex.c:1033 [inline]
 __mutex_lock+0x7ab/0x13c0 kernel/locking/mutex.c:1103
 blk_trace_setup+0x2f/0x60 kernel/trace/blktrace.c:588
 sg_ioctl_common+0x2f2/0x2710 drivers/scsi/sg.c:1116
 sg_ioctl+0x8f/0x120 drivers/scsi/sg.c:1159
 vfs_ioctl fs/ioctl.c:47 [inline]
 ksys_ioctl+0x11a/0x180 fs/ioctl.c:763
 __do_sys_ioctl fs/ioctl.c:772 [inline]
 __se_sys_ioctl fs/ioctl.c:770 [inline]
 __x64_sys_ioctl+0x6f/0xb0 fs/ioctl.c:770
 do_syscall_64+0xf6/0x7d0 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x45c849
Code: Bad RIP value.
RSP: 002b:00007f5ba5a1ac78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f5ba5a1b6d4 RCX: 000000000045c849
RDX: 0000000020000080 RSI: 00000000c0481273 RDI: 0000000000000008
RBP: 000000000076bfa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 0000000000000228 R14: 00000000004c44eb R15: 000000000076bfac
INFO: task syz-executor.5:7265 blocked for more than 149 seconds.
      Not tainted 5.6.0-rc6-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.5  D26736  7265   9613 0x00004004
Call Trace:
 schedule+0xd0/0x2a0 kernel/sched/core.c:4154
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:4213
 __mutex_lock_common kernel/locking/mutex.c:1033 [inline]
 __mutex_lock+0x7ab/0x13c0 kernel/locking/mutex.c:1103
 blk_trace_setup+0x2f/0x60 kernel/trace/blktrace.c:588
 sg_ioctl_common+0x2f2/0x2710 drivers/scsi/sg.c:1116
 sg_ioctl+0x8f/0x120 drivers/scsi/sg.c:1159
 vfs_ioctl fs/ioctl.c:47 [inline]
 ksys_ioctl+0x11a/0x180 fs/ioctl.c:763
 __do_sys_ioctl fs/ioctl.c:772 [inline]
 __se_sys_ioctl fs/ioctl.c:770 [inline]
 __x64_sys_ioctl+0x6f/0xb0 fs/ioctl.c:770
 do_syscall_64+0xf6/0x7d0 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x45c849
Code: Bad RIP value.
RSP: 002b:00007f576f48ac78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f576f48b6d4 RCX: 000000000045c849
RDX: 0000000020000080 RSI: 00000000c0481273 RDI: 0000000000000006

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2020/03/16 22:04 upstream fb33c6510d55 749688d2 .config console log report ci-upstream-kasan-gce
* Struck through repros no longer work on HEAD.