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| Kernel | Title | Repro | Cause bisect | Fix bisect | Count | Last | Reported | Patched | Status |
|---|---|---|---|---|---|---|---|---|---|
| linux-5.15 | INFO: task hung in writepage_delalloc (2) | 1 | 352d | 352d | 0/3 | auto-obsoleted due to no activity on 2024/01/04 22:50 | |||
| linux-5.15 | INFO: task hung in writepage_delalloc | 1 | 541d | 541d | 0/3 | auto-obsoleted due to no activity on 2023/07/19 03:54 | |||
| upstream | INFO: task hung in writepage_delalloc (2) btrfs | 1 | 316d | 316d | 0/27 | auto-obsoleted due to no activity on 2024/01/30 19:55 |
INFO: task kworker/u4:0:10 blocked for more than 143 seconds.
Not tainted 6.5.0-rc3-next-20230728-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u4:0 state:D stack:26368 pid:10 ppid:2 flags:0x00004000
Workqueue: writeback wb_workfn (flush-btrfs-17)
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5382 [inline]
__schedule+0xee1/0x59f0 kernel/sched/core.c:6711
schedule+0xe7/0x1b0 kernel/sched/core.c:6787
io_schedule+0xbe/0x130 kernel/sched/core.c:9042
folio_wait_bit_common+0x3d0/0x9a0 mm/filemap.c:1304
lock_page include/linux/pagemap.h:1055 [inline]
btrfs_page_start_writer_lock+0x3eb/0x670 fs/btrfs/subpage.c:344
lock_delalloc_pages+0x383/0x910 fs/btrfs/extent_io.c:301
find_lock_delalloc_range+0x445/0x710 fs/btrfs/extent_io.c:394
writepage_delalloc+0x14f/0x410 fs/btrfs/extent_io.c:1180
__extent_writepage fs/btrfs/extent_io.c:1460 [inline]
extent_write_cache_pages+0x8d5/0x1b30 fs/btrfs/extent_io.c:2133
extent_writepages+0x21b/0x4a0 fs/btrfs/extent_io.c:2252
do_writepages+0x1b4/0x690 mm/page-writeback.c:2553
__writeback_single_inode+0x158/0xe70 fs/fs-writeback.c:1603
writeback_sb_inodes+0x599/0x1010 fs/fs-writeback.c:1894
__writeback_inodes_wb+0xff/0x2d0 fs/fs-writeback.c:1965
wb_writeback+0x7f8/0xa90 fs/fs-writeback.c:2072
wb_check_background_flush fs/fs-writeback.c:2142 [inline]
wb_do_writeback fs/fs-writeback.c:2230 [inline]
wb_workfn+0x874/0xfd0 fs/fs-writeback.c:2257
process_one_work+0xaa2/0x16f0 kernel/workqueue.c:2603
worker_thread+0x687/0x1110 kernel/workqueue.c:2754
kthread+0x33a/0x430 kernel/kthread.c:389
ret_from_fork+0x2c/0x70 arch/x86/kernel/process.c:145
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304
</TASK>
INFO: task syz-executor.2:24387 blocked for more than 146 seconds.
Not tainted 6.5.0-rc3-next-20230728-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.2 state:D stack:25936 pid:24387 ppid:5091 flags:0x00000006
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5382 [inline]
__schedule+0xee1/0x59f0 kernel/sched/core.c:6711
schedule+0xe7/0x1b0 kernel/sched/core.c:6787
schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6846
rwsem_down_write_slowpath+0x53e/0x1290 kernel/locking/rwsem.c:1178
__down_write_common kernel/locking/rwsem.c:1306 [inline]
__down_write kernel/locking/rwsem.c:1315 [inline]
down_write+0x1d3/0x200 kernel/locking/rwsem.c:1574
inode_lock include/linux/fs.h:802 [inline]
process_measurement+0x39b/0x1cc0 security/integrity/ima/ima_main.c:247
ima_file_mmap+0x143/0x1d0 security/integrity/ima/ima_main.c:428
security_mmap_file+0x187/0x1d0 security/security.c:2690
vm_mmap_pgoff+0xdc/0x3b0 mm/util.c:539
ksys_mmap_pgoff+0x422/0x5b0 mm/mmap.c:1394
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fa60327cb29
RSP: 002b:00007fa6040b30c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 00007fa60339bf80 RCX: 00007fa60327cb29
RDX: 00000000027fffff RSI: 0000000000600000 RDI: 0000000020000000
RBP: 00007fa6032c847a R08: 0000000000000005 R09: 0000000000000000
R10: 0000000004002011 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007fa60339bf80 R15: 00007ffe612e1898
</TASK>
INFO: task syz-executor.2:24417 blocked for more than 146 seconds.
Not tainted 6.5.0-rc3-next-20230728-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.2 state:D stack:27184 pid:24417 ppid:5091 flags:0x00000006
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5382 [inline]
__schedule+0xee1/0x59f0 kernel/sched/core.c:6711
schedule+0xe7/0x1b0 kernel/sched/core.c:6787
wait_on_state fs/btrfs/extent-io-tree.c:719 [inline]
wait_extent_bit+0x578/0x670 fs/btrfs/extent-io-tree.c:763
lock_extent+0x104/0x190 fs/btrfs/extent-io-tree.c:1755
btrfs_page_mkwrite+0x653/0x11e0 fs/btrfs/inode.c:8053
do_page_mkwrite+0x17a/0x380 mm/memory.c:3080
wp_page_shared mm/memory.c:3440 [inline]
do_wp_page+0xd04/0x3550 mm/memory.c:3525
handle_pte_fault mm/memory.c:5152 [inline]
__handle_mm_fault+0x1704/0x4030 mm/memory.c:5276
handle_mm_fault+0x47a/0xa00 mm/memory.c:5441
do_user_addr_fault+0x3ad/0xfe0 arch/x86/mm/fault.c:1391
handle_page_fault arch/x86/mm/fault.c:1483 [inline]
exc_page_fault+0x5c/0xd0 arch/x86/mm/fault.c:1539
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570
RIP: 0010:rep_movs_alternative+0x33/0xb0 arch/x86/lib/copy_user_64.S:58
Code: 40 83 f9 08 73 21 85 c9 74 0f 8a 06 88 07 48 ff c7 48 ff c6 48 ff c9 75 f1 c3 66 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 8b 06 <48> 89 07 48 83 c6 08 48 83 c7 08 83 e9 08 74 df 83 f9 08 73 e8 eb
RSP: 0018:ffffc90015b5f720 EFLAGS: 00050206
RAX: 0000000000000000 RBX: 0000000000000038 RCX: 0000000000000038
RDX: fffff52002b6befb RSI: ffffc90015b5f7a0 RDI: 00000000200012e0
RBP: 00000000200012e0 R08: 0000000000000000 R09: fffff52002b6befa
R10: ffffc90015b5f7d7 R11: ffffffff8a40008b R12: ffffc90015b5f7a0
R13: 0000000020001318 R14: 0000000000000000 R15: 0000000000000000
copy_user_generic arch/x86/include/asm/uaccess_64.h:112 [inline]
raw_copy_to_user arch/x86/include/asm/uaccess_64.h:133 [inline]
_copy_to_user lib/usercopy.c:41 [inline]
_copy_to_user+0xa8/0xb0 lib/usercopy.c:34
copy_to_user include/linux/uaccess.h:191 [inline]
fiemap_fill_next_extent+0x232/0x380 fs/ioctl.c:144
emit_fiemap_extent+0x195/0x380 fs/btrfs/extent_io.c:2498
fiemap_process_hole+0x52d/0x620 fs/btrfs/extent_io.c:2756
extent_fiemap+0x12be/0x19f0 fs/btrfs/extent_io.c:2971
btrfs_fiemap+0xe4/0x160 fs/btrfs/inode.c:7725
ioctl_fiemap fs/ioctl.c:219 [inline]
do_vfs_ioctl+0x339/0x1920 fs/ioctl.c:810
__do_sys_ioctl fs/ioctl.c:868 [inline]
__se_sys_ioctl fs/ioctl.c:856 [inline]
__x64_sys_ioctl+0x112/0x210 fs/ioctl.c:856
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fa60327cb29
RSP: 002b:00007fa6040920c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fa60339c050 RCX: 00007fa60327cb29
RDX: 00000000200012c0 RSI: 00000000c020660b RDI: 0000000000000004
RBP: 00007fa6032c847a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007fa60339c050 R15: 00007ffe612e1898
</TASK>
INFO: lockdep is turned off.
NMI backtrace for cpu 1
CPU: 1 PID: 28 Comm: khungtaskd Not tainted 6.5.0-rc3-next-20230728-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2023
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106
nmi_cpu_backtrace+0x277/0x380 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x2ac/0x310 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline]
watchdog+0xfab/0x1230 kernel/hung_task.c:379
kthread+0x33a/0x430 kernel/kthread.c:389
ret_from_fork+0x2c/0x70 arch/x86/kernel/process.c:145
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304
</TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 2867 Comm: kworker/u4:11 Not tainted 6.5.0-rc3-next-20230728-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2023
Workqueue: bat_events batadv_tt_purge
RIP: 0010:__local_bh_enable_ip+0x74/0x120 kernel/softirq.c:368
Code: 00 8b 05 a3 61 5d 0d 85 c0 74 0b 65 8b 05 44 53 b3 7e 85 c0 74 53 9c 58 fa f6 c4 02 75 5a 65 8b 05 f9 83 b4 7e 25 00 ff 00 00 <3d> 00 02 00 00 74 4e 83 eb 01 f7 db 65 01 1d e1 83 b4 7e 65 8b 05
RSP: 0018:ffffc9000c4afaf0 EFLAGS: 00000006
RAX: 0000000000000200 RBX: 0000000000000201 RCX: ffffffff818db7cb
RDX: 0000000000000000 RSI: ffffffff8ac87be0 RDI: ffffffff8c3aaa00
RBP: ffffffff8a04118c R08: 0000000000000000 R09: fffffbfff1d58c52
R10: ffffffff8eac6297 R11: 0000000000000001 R12: 0000000000000133
R13: ffff888085024c80 R14: ffff8880183d6f00 R15: dffffc0000000000
FS: 0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f52277ab200 CR3: 000000000c776000 CR4: 00000000003506f0
Call Trace:
<NMI>
</NMI>
<TASK>
spin_unlock_bh include/linux/spinlock.h:396 [inline]
batadv_tt_local_purge+0x21c/0x3c0 net/batman-adv/translation-table.c:1357
batadv_tt_purge+0x8b/0xbb0 net/batman-adv/translation-table.c:3561
process_one_work+0xaa2/0x16f0 kernel/workqueue.c:2603
worker_thread+0x687/0x1110 kernel/workqueue.c:2754
kthread+0x33a/0x430 kernel/kthread.c:389
ret_from_fork+0x2c/0x70 arch/x86/kernel/process.c:145
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304
</TASK>
| Time | Kernel | Commit | Syzkaller | Config | Log | Report | Syz repro | C repro | VM info | Assets (help?) | Manager | Title |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2023/07/30 02:41 | linux-next | d7b3af5a77e8 | 92476829 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-upstream-linux-next-kasan-gce-root | INFO: task hung in writepage_delalloc |