INFO: task syz-executor.3:3639 blocked for more than 143 seconds.
Not tainted 5.19.0-rc3-syzkaller-00146-g92f20ff72066 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.3 state:D stack:24640 pid: 3639 ppid: 1 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5146 [inline]
__schedule+0xa00/0x4b50 kernel/sched/core.c:6458
schedule+0xd2/0x1f0 kernel/sched/core.c:6530
wb_wait_for_completion+0x17e/0x240 fs/fs-writeback.c:191
__writeback_inodes_sb_nr+0x1d7/0x280 fs/fs-writeback.c:2607
sync_filesystem.part.0+0x1f/0x1d0 fs/sync.c:54
sync_filesystem+0x8b/0xc0 fs/sync.c:43
ovl_sync_fs+0x107/0x170 fs/overlayfs/super.c:296
sync_filesystem.part.0+0x13c/0x1d0 fs/sync.c:66
sync_filesystem+0x8b/0xc0 fs/sync.c:43
generic_shutdown_super+0x70/0x400 fs/super.c:445
kill_anon_super+0x36/0x60 fs/super.c:1056
deactivate_locked_super+0x94/0x160 fs/super.c:332
deactivate_super+0xad/0xd0 fs/super.c:363
cleanup_mnt+0x3a2/0x540 fs/namespace.c:1186
task_work_run+0xdd/0x1a0 kernel/task_work.c:177
resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
exit_to_user_mode_loop kernel/entry/common.c:169 [inline]
exit_to_user_mode_prepare+0x23c/0x250 kernel/entry/common.c:201
__syscall_exit_to_user_mode_work kernel/entry/common.c:283 [inline]
syscall_exit_to_user_mode+0x19/0x50 kernel/entry/common.c:294
do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x46/0xb0
RIP: 0033:0x7fdc7b48a577
RSP: 002b:00007ffdbe7483d8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007fdc7b48a577
RDX: 00007ffdbe7484aa RSI: 000000000000000a RDI: 00007ffdbe7484a0
RBP: 00007ffdbe7484a0 R08: 00000000ffffffff R09: 00007ffdbe748270
R10: 000055555750e943 R11: 0000000000000246 R12: 00007fdc7b4e21c8
R13: 00007ffdbe749560 R14: 000055555750e810 R15: 00007ffdbe7495a0
INFO: task syz-executor.5:3640 blocked for more than 143 seconds.
Not tainted 5.19.0-rc3-syzkaller-00146-g92f20ff72066 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.5 state:D stack:24816 pid: 3640 ppid: 1 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5146 [inline]
__schedule+0xa00/0x4b50 kernel/sched/core.c:6458
schedule+0xd2/0x1f0 kernel/sched/core.c:6530
wb_wait_for_completion+0x17e/0x240 fs/fs-writeback.c:191
__writeback_inodes_sb_nr+0x1d7/0x280 fs/fs-writeback.c:2607
sync_filesystem.part.0+0x1f/0x1d0 fs/sync.c:54
sync_filesystem+0x8b/0xc0 fs/sync.c:43
ovl_sync_fs+0x107/0x170 fs/overlayfs/super.c:296
sync_filesystem.part.0+0x13c/0x1d0 fs/sync.c:66
sync_filesystem+0x8b/0xc0 fs/sync.c:43
generic_shutdown_super+0x70/0x400 fs/super.c:445
kill_anon_super+0x36/0x60 fs/super.c:1056
deactivate_locked_super+0x94/0x160 fs/super.c:332
deactivate_super+0xad/0xd0 fs/super.c:363
cleanup_mnt+0x3a2/0x540 fs/namespace.c:1186
task_work_run+0xdd/0x1a0 kernel/task_work.c:177
resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
exit_to_user_mode_loop kernel/entry/common.c:169 [inline]
exit_to_user_mode_prepare+0x23c/0x250 kernel/entry/common.c:201
__syscall_exit_to_user_mode_work kernel/entry/common.c:283 [inline]
syscall_exit_to_user_mode+0x19/0x50 kernel/entry/common.c:294
do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x46/0xb0
RIP: 0033:0x7fedf3e8a577
RSP: 002b:00007ffc4b2cc4f8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007fedf3e8a577
RDX: 00007ffc4b2cc5ca RSI: 000000000000000a RDI: 00007ffc4b2cc5c0
RBP: 00007ffc4b2cc5c0 R08: 00000000ffffffff R09: 00007ffc4b2cc390
R10: 0000555555b2f943 R11: 0000000000000246 R12: 00007fedf3ee21c8
R13: 00007ffc4b2cd680 R14: 0000555555b2f810 R15: 00007ffc4b2cd6c0
INFO: task syz-executor.4:13210 blocked for more than 143 seconds.
Not tainted 5.19.0-rc3-syzkaller-00146-g92f20ff72066 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.4 state:D stack:24544 pid:13210 ppid: 1 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5146 [inline]
__schedule+0xa00/0x4b50 kernel/sched/core.c:6458
schedule+0xd2/0x1f0 kernel/sched/core.c:6530
wb_wait_for_completion+0x17e/0x240 fs/fs-writeback.c:191
__writeback_inodes_sb_nr+0x1d7/0x280 fs/fs-writeback.c:2607
sync_filesystem.part.0+0x1f/0x1d0 fs/sync.c:54
sync_filesystem+0x8b/0xc0 fs/sync.c:43
ovl_sync_fs+0x107/0x170 fs/overlayfs/super.c:296
sync_filesystem.part.0+0x13c/0x1d0 fs/sync.c:66
sync_filesystem+0x8b/0xc0 fs/sync.c:43
generic_shutdown_super+0x70/0x400 fs/super.c:445
kill_anon_super+0x36/0x60 fs/super.c:1056
deactivate_locked_super+0x94/0x160 fs/super.c:332
deactivate_super+0xad/0xd0 fs/super.c:363
cleanup_mnt+0x3a2/0x540 fs/namespace.c:1186
task_work_run+0xdd/0x1a0 kernel/task_work.c:177
resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
exit_to_user_mode_loop kernel/entry/common.c:169 [inline]
exit_to_user_mode_prepare+0x23c/0x250 kernel/entry/common.c:201
__syscall_exit_to_user_mode_work kernel/entry/common.c:283 [inline]
syscall_exit_to_user_mode+0x19/0x50 kernel/entry/common.c:294
do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x46/0xb0
RIP: 0033:0x7f81e748a577
RSP: 002b:00007ffc37cf0e68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f81e748a577
RDX: 00007ffc37cf0f3a RSI: 000000000000000a RDI: 00007ffc37cf0f30
RBP: 00007ffc37cf0f30 R08: 00000000ffffffff R09: 00007ffc37cf0d00
R10: 0000555556d61943 R11: 0000000000000246 R12: 00007f81e74e21c8
R13: 00007ffc37cf1ff0 R14: 0000555556d61810 R15: 00007ffc37cf2030
INFO: task syz-executor.1:15620 blocked for more than 143 seconds.
Not tainted 5.19.0-rc3-syzkaller-00146-g92f20ff72066 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.1 state:D stack:24896 pid:15620 ppid: 1 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5146 [inline]
__schedule+0xa00/0x4b50 kernel/sched/core.c:6458
schedule+0xd2/0x1f0 kernel/sched/core.c:6530
wb_wait_for_completion+0x17e/0x240 fs/fs-writeback.c:191
__writeback_inodes_sb_nr+0x1d7/0x280 fs/fs-writeback.c:2607
sync_filesystem.part.0+0x1f/0x1d0 fs/sync.c:54
sync_filesystem+0x8b/0xc0 fs/sync.c:43
ovl_sync_fs+0x107/0x170 fs/overlayfs/super.c:296
sync_filesystem.part.0+0x13c/0x1d0 fs/sync.c:66
sync_filesystem+0x8b/0xc0 fs/sync.c:43
generic_shutdown_super+0x70/0x400 fs/super.c:445
kill_anon_super+0x36/0x60 fs/super.c:1056
deactivate_locked_super+0x94/0x160 fs/super.c:332
deactivate_super+0xad/0xd0 fs/super.c:363
cleanup_mnt+0x3a2/0x540 fs/namespace.c:1186
task_work_run+0xdd/0x1a0 kernel/task_work.c:177
resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
exit_to_user_mode_loop kernel/entry/common.c:169 [inline]
exit_to_user_mode_prepare+0x23c/0x250 kernel/entry/common.c:201
__syscall_exit_to_user_mode_work kernel/entry/common.c:283 [inline]
syscall_exit_to_user_mode+0x19/0x50 kernel/entry/common.c:294
do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x46/0xb0
RIP: 0033:0x7f6b7628a577
RSP: 002b:00007ffdec3b3578 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f6b7628a577
RDX: 00007ffdec3b364a RSI: 000000000000000a RDI: 00007ffdec3b3640
RBP: 00007ffdec3b3640 R08: 00000000ffffffff R09: 00007ffdec3b3410
R10: 00005555566d9943 R11: 0000000000000246 R12: 00007f6b762e21c8
R13: 00007ffdec3b4700 R14: 00005555566d9810 R15: 00007ffdec3b4740
INFO: task syz-executor.2:25172 blocked for more than 143 seconds.
Not tainted 5.19.0-rc3-syzkaller-00146-g92f20ff72066 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.2 state:D stack:25120 pid:25172 ppid: 1 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5146 [inline]
__schedule+0xa00/0x4b50 kernel/sched/core.c:6458
schedule+0xd2/0x1f0 kernel/sched/core.c:6530
wb_wait_for_completion+0x17e/0x240 fs/fs-writeback.c:191
__writeback_inodes_sb_nr+0x1d7/0x280 fs/fs-writeback.c:2607
sync_filesystem.part.0+0x1f/0x1d0 fs/sync.c:54
sync_filesystem+0x8b/0xc0 fs/sync.c:43
ovl_sync_fs+0x107/0x170 fs/overlayfs/super.c:296
sync_filesystem.part.0+0x13c/0x1d0 fs/sync.c:66
sync_filesystem+0x8b/0xc0 fs/sync.c:43
generic_shutdown_super+0x70/0x400 fs/super.c:445
kill_anon_super+0x36/0x60 fs/super.c:1056
deactivate_locked_super+0x94/0x160 fs/super.c:332
deactivate_super+0xad/0xd0 fs/super.c:363
cleanup_mnt+0x3a2/0x540 fs/namespace.c:1186
task_work_run+0xdd/0x1a0 kernel/task_work.c:177
resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
exit_to_user_mode_loop kernel/entry/common.c:169 [inline]
exit_to_user_mode_prepare+0x23c/0x250 kernel/entry/common.c:201
__syscall_exit_to_user_mode_work kernel/entry/common.c:283 [inline]
syscall_exit_to_user_mode+0x19/0x50 kernel/entry/common.c:294
do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x46/0xb0
RIP: 0033:0x7fa95b88a577
RSP: 002b:00007fff6b6319c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007fa95b88a577
RDX: 00007fff6b631a9a RSI: 000000000000000a RDI: 00007fff6b631a90
RBP: 00007fff6b631a90 R08: 00000000ffffffff R09: 00007fff6b631860
R10: 0000555556d80943 R11: 0000000000000246 R12: 00007fa95b8e21c8
R13: 00007fff6b632b50 R14: 0000555556d80810 R15: 00007fff6b632b90
Showing all locks held in the system:
1 lock held by pr/ttyS0/16:
1 lock held by khungtaskd/29:
#0: ffffffff8bd840a0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6491
2 locks held by getty/3295:
#0: ffff888023300098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:244
#1: ffffc90001c482e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xe50/0x13c0 drivers/tty/n_tty.c:2124
2 locks held by syz-executor.3/3639:
#0: ffff888046b120e0 (&type->s_umount_key#83){+.+.}-{3:3}, at: deactivate_super+0xa5/0xd0 fs/super.c:362
#1: ffff88814b0a40e0 (&type->s_umount_key#31){++++}-{3:3}, at: ovl_sync_fs+0xff/0x170 fs/overlayfs/super.c:295
2 locks held by syz-executor.5/3640:
#0: ffff888016c080e0 (&type->s_umount_key#83){+.+.}-{3:3}, at: deactivate_super+0xa5/0xd0 fs/super.c:362
#1: ffff88814b0a40e0 (&type->s_umount_key#31){++++}-{3:3}, at: ovl_sync_fs+0xff/0x170 fs/overlayfs/super.c:295
3 locks held by kworker/u4:24/5840:
1 lock held by kworker/0:15/8233:
#0: ffff8880b9a39f98 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2b/0x120 kernel/sched/core.c:544
2 locks held by syz-executor.4/13210:
#0: ffff88804cd5e0e0 (&type->s_umount_key#83){+.+.}-{3:3}, at: deactivate_super+0xa5/0xd0 fs/super.c:362
#1: ffff88814b0a40e0 (&type->s_umount_key#31){++++}-{3:3}, at: ovl_sync_fs+0xff/0x170 fs/overlayfs/super.c:295
2 locks held by syz-executor.1/15620:
#0: ffff88801d3b60e0 (&type->s_umount_key#83){+.+.}-{3:3}, at: deactivate_super+0xa5/0xd0 fs/super.c:362
#1: ffff88814b0a40e0 (&type->s_umount_key#31){++++}-{3:3}, at: ovl_sync_fs+0xff/0x170 fs/overlayfs/super.c:295
3 locks held by kworker/u4:5/23440:
2 locks held by syz-executor.2/25172:
#0: ffff88802ffd00e0 (&type->s_umount_key#83){+.+.}-{3:3}, at: deactivate_super+0xa5/0xd0 fs/super.c:362
#1: ffff88814b0a40e0 (&type->s_umount_key#31){++++}-{3:3}, at: ovl_sync_fs+0xff/0x170 fs/overlayfs/super.c:295
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 29 Comm: khungtaskd Not tainted 5.19.0-rc3-syzkaller-00146-g92f20ff72066 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106
nmi_cpu_backtrace.cold+0x47/0x144 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x1e6/0x230 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:220 [inline]
watchdog+0xc22/0xf90 kernel/hung_task.c:378
kthread+0x2e9/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:302
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 2968 Comm: klogd Not tainted 5.19.0-rc3-syzkaller-00146-g92f20ff72066 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:check_region_inline mm/kasan/generic.c:170 [inline]
RIP: 0010:kasan_check_range+0x12c/0x180 mm/kasan/generic.c:189
Code: 00 74 ef 49 8d 04 2c 48 85 d2 75 0b 48 89 da 48 29 c2 e9 55 ff ff ff 49 39 d2 75 17 49 0f be 02 41 83 e1 07 49 39 c1 7d 0a 5b 01 00 00 00 5d 41 5c c3 44 89 c2 e8 03 f0 ff ff 5b 83 f0 01 5d
RSP: 0018:ffffc900030c7a20 EFLAGS: 00000246
RAX: fffffbfff21e15e1 RBX: ffffc900030c7b28 RCX: ffffffff81602af5
RDX: fffffbfff21e15e1 RSI: 0000000000000029 RDI: ffffffff90f0aed8
RBP: fffffbfff21e15db R08: 0000000000000000 R09: ffffffff90f0af00
R10: fffffbfff21e15e0 R11: 0000000000000001 R12: 0000000000000029
R13: ffff8880780a1000 R14: 0000000000002b3f R15: ffffffff8bc92640
FS: 00007f0483bde800(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055a55ad17680 CR3: 000000001fb6e000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
memcpy+0x20/0x60 mm/kasan/shadow.c:65
copy_data kernel/printk/printk_ringbuffer.c:1740 [inline]
prb_read kernel/printk/printk_ringbuffer.c:1825 [inline]
_prb_read_valid+0x495/0x710 kernel/printk/printk_ringbuffer.c:1891
prb_read_valid+0x75/0xa0 kernel/printk/printk_ringbuffer.c:1940
syslog_print+0x3f0/0x580 kernel/printk/printk.c:1679
do_syslog.part.0+0x1db/0x5f0 kernel/printk/printk.c:1815
do_syslog kernel/printk/printk.c:1905 [inline]
__do_sys_syslog kernel/printk/printk.c:1907 [inline]
__se_sys_syslog kernel/printk/printk.c:1905 [inline]
__x64_sys_syslog+0x97/0xc0 kernel/printk/printk.c:1905
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x46/0xb0
RIP: 0033:0x7f0483d798b7
Code: 73 01 c3 48 8b 0d c1 05 0c 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 67 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 91 05 0c 00 f7 d8 64 89 01 48
RSP: 002b:00007ffd1382a1a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000067
RAX: ffffffffffffffda RBX: 00007f0483f06490 RCX: 00007f0483d798b7
RDX: 00000000000003ff RSI: 00007f0483f06490 RDI: 0000000000000002
RBP: 0000000000000000 R08: 0000000000000007 R09: 000055d581781960
R10: 0000000000004000 R11: 0000000000000206 R12: 00007f0483f06490
R13: 00007f0483f06861 R14: 00007f0483f06861 R15: 0000000000000000
----------------
Code disassembly (best guess):
0: 00 74 ef 49 add %dh,0x49(%rdi,%rbp,8)
4: 8d 04 2c lea (%rsp,%rbp,1),%eax
7: 48 85 d2 test %rdx,%rdx
a: 75 0b jne 0x17
c: 48 89 da mov %rbx,%rdx
f: 48 29 c2 sub %rax,%rdx
12: e9 55 ff ff ff jmpq 0xffffff6c
17: 49 39 d2 cmp %rdx,%r10
1a: 75 17 jne 0x33
1c: 49 0f be 02 movsbq (%r10),%rax
20: 41 83 e1 07 and $0x7,%r9d
24: 49 39 c1 cmp %rax,%r9
27: 7d 0a jge 0x33
29: 5b pop %rbx
* 2a: b8 01 00 00 00 mov $0x1,%eax <-- trapping instruction
2f: 5d pop %rbp
30: 41 5c pop %r12
32: c3 retq
33: 44 89 c2 mov %r8d,%edx
36: e8 03 f0 ff ff callq 0xfffff03e
3b: 5b pop %rbx
3c: 83 f0 01 xor $0x1,%eax
3f: 5d pop %rbp