INFO: task syz.3.2635:18047 blocked for more than 143 seconds.
Not tainted 6.11.0-syzkaller-02574-ga430d95c5efa #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.3.2635 state:D stack:26464 pid:18047 tgid:18047 ppid:16605 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5188 [inline]
__schedule+0xe37/0x5490 kernel/sched/core.c:6529
__schedule_loop kernel/sched/core.c:6606 [inline]
schedule+0xe7/0x350 kernel/sched/core.c:6621
coredump_task_exit kernel/exit.c:434 [inline]
do_exit+0x3fe/0x2bb0 kernel/exit.c:834
do_group_exit+0xd3/0x2a0 kernel/exit.c:1031
get_signal+0x2658/0x26d0 kernel/signal.c:2917
arch_do_signal_or_restart+0x90/0x7e0 arch/x86/kernel/signal.c:310
exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
syscall_exit_to_user_mode+0x150/0x2a0 kernel/entry/common.c:218
do_syscall_64+0xda/0x250 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fca95f7def9
RSP: 002b:00007fff37d82238 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffdfc RBX: 00007fff37d82360 RCX: 00007fca95f7def9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007fca9613613c
RBP: 00007fca9613613c R08: 00007fca96e64080 R09: 00007fff37d8252f
R10: 00007fff37d82340 R11: 0000000000000246 R12: 000000000010d93a
R13: 00007fff37d82340 R14: 0000000000000032 R15: 000000000010d908
INFO: task :18049 blocked for more than 143 seconds.
Not tainted 6.11.0-syzkaller-02574-ga430d95c5efa #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task: state:D stack:25824 pid:18049 tgid:18047 ppid:16605 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5188 [inline]
__schedule+0xe37/0x5490 kernel/sched/core.c:6529
__schedule_loop kernel/sched/core.c:6606 [inline]
schedule+0xe7/0x350 kernel/sched/core.c:6621
coredump_task_exit kernel/exit.c:434 [inline]
do_exit+0x3fe/0x2bb0 kernel/exit.c:834
do_group_exit+0xd3/0x2a0 kernel/exit.c:1031
get_signal+0x2658/0x26d0 kernel/signal.c:2917
arch_do_signal_or_restart+0x90/0x7e0 arch/x86/kernel/signal.c:310
exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
syscall_exit_to_user_mode+0x150/0x2a0 kernel/entry/common.c:218
do_syscall_64+0xda/0x250 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fca95f7def9
RSP: 002b:00007fca96e63038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: fffffffffffffffe RBX: 00007fca96135f80 RCX: 00007fca95f7def9
RDX: 0000000020000780 RSI: 0000000000008932 RDI: 0000000000000007
RBP: 00007fca95ff0b76 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fca96135f80 R15: 00007fff37d820d8
INFO: task syz.3.2635:18059 blocked for more than 144 seconds.
Not tainted 6.11.0-syzkaller-02574-ga430d95c5efa #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.3.2635 state:D stack:28272 pid:18059 tgid:18047 ppid:16605 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:5188 [inline]
__schedule+0xe37/0x5490 kernel/sched/core.c:6529
__schedule_loop kernel/sched/core.c:6606 [inline]
schedule+0xe7/0x350 kernel/sched/core.c:6621
schedule_timeout+0x258/0x2a0 kernel/time/timer.c:2557
do_wait_for_common kernel/sched/completion.c:95 [inline]
__wait_for_common+0x3de/0x5f0 kernel/sched/completion.c:116
wait_for_common kernel/sched/completion.c:127 [inline]
wait_for_completion_state+0x1c/0x40 kernel/sched/completion.c:264
coredump_wait fs/coredump.c:417 [inline]
do_coredump+0x821/0x3da0 fs/coredump.c:574
get_signal+0x237c/0x26d0 kernel/signal.c:2902
arch_do_signal_or_restart+0x90/0x7e0 arch/x86/kernel/signal.c:310
exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
syscall_exit_to_user_mode+0x150/0x2a0 kernel/entry/common.c:218
do_syscall_64+0xda/0x250 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fca95f7def9
RSP: 002b:00007fca96e210e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: ffffffffffffffda RBX: 00007fca96136138 RCX: 00007fca95f7def9
RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007fca9613613c
RBP: 00007fca96136130 R08: 00007fca96e64080 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fca9613613c
R13: 0000000000000000 R14: 00007fff37d81ff0 R15: 00007fff37d820d8
Showing all locks held in the system:
1 lock held by khungtaskd/31:
#0: ffffffff8ddb9b60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:326 [inline]
#0: ffffffff8ddb9b60 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:838 [inline]
#0: ffffffff8ddb9b60 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x75/0x340 kernel/locking/lockdep.c:6626
2 locks held by getty/4989:
#0: ffff8880345310a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
#1: ffffc900031232f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xfba/0x1480 drivers/tty/n_tty.c:2211
1 lock held by syz.3.2635/18056:
1 lock held by syz.0.3038/19975:
1 lock held by syz.2.3046/20008:
3 locks held by syz.0.3097/20194:
=============================================
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.11.0-syzkaller-02574-ga430d95c5efa #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
Call Trace:
__dump_stack lib/dump_stack.c:93 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:119
nmi_cpu_backtrace+0x27b/0x390 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x29c/0x300 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:223 [inline]
watchdog+0xf0c/0x1240 kernel/hung_task.c:379
kthread+0x2c1/0x3a0 kernel/kthread.c:389
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 20194 Comm: syz.0.3097 Not tainted 6.11.0-syzkaller-02574-ga430d95c5efa #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
RIP: 0010:deref_stack_reg arch/x86/kernel/unwind_orc.c:406 [inline]
RIP: 0010:unwind_next_frame+0xdbe/0x23a0 arch/x86/kernel/unwind_orc.c:585
Code: 24 28 e8 e5 ef ff ff 31 ff 41 89 c7 89 c6 e8 e9 7a 4e 00 48 8d 4b 34 45 84 ff 0f 84 37 f6 ff ff e8 f7 78 4e 00 48 8b 7c 24 28 6d e6 ff ff 48 8b 0c 24 48 ba 00 00 00 00 00 fc ff df 48 c1 e9
RSP: 0018:ffffc9000387e768 EFLAGS: 00000293
RAX: 0000000000000000 RBX: ffffc9000387e7e8 RCX: ffffc9000387e81c
RDX: ffff88807aa39e00 RSI: ffffffff813cabc9 RDI: ffffc9000387efb0
RBP: 0000000000000001 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: dffffc0000000000 R12: ffffffff90b7f2ac
R13: ffffc9000387efb8 R14: ffffffff90b7f2b0 R15: 0000000000000001
FS: 00007f47db3ff6c0(0000) GS:ffff8880b8900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f981d307ab8 CR3: 00000000800c0000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
arch_stack_walk+0x100/0x170 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x95/0xd0 kernel/stacktrace.c:122
save_stack+0x162/0x1f0 mm/page_owner.c:156
__set_page_owner+0x8f/0x790 mm/page_owner.c:320
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x2d1/0x350 mm/page_alloc.c:1500
prep_new_page mm/page_alloc.c:1508 [inline]
get_page_from_freelist+0x1351/0x2e50 mm/page_alloc.c:3446
__alloc_pages_noprof+0x22b/0x2460 mm/page_alloc.c:4702
alloc_pages_mpol_noprof+0x275/0x610 mm/mempolicy.c:2263
folio_alloc_mpol_noprof+0x36/0xd0 mm/mempolicy.c:2281
shmem_alloc_folio+0x135/0x160 mm/shmem.c:1722
shmem_alloc_and_add_folio+0x19c/0xce0 mm/shmem.c:1782
shmem_get_folio_gfp+0xa62/0x15e0 mm/shmem.c:2188
shmem_get_folio mm/shmem.c:2293 [inline]
shmem_write_begin+0x15a/0x2f0 mm/shmem.c:2898
generic_perform_write+0x315/0x970 mm/filemap.c:4025
shmem_file_write_iter+0x10e/0x140 mm/shmem.c:3073
__kernel_write_iter+0x318/0xa80 fs/read_write.c:616
dump_emit_page fs/coredump.c:893 [inline]
dump_user_range+0x389/0x8a0 fs/coredump.c:954
elf_core_dump+0x2727/0x3810 fs/binfmt_elf.c:2116
do_coredump+0x29e4/0x3da0 fs/coredump.c:767
get_signal+0x237c/0x26d0 kernel/signal.c:2902
arch_do_signal_or_restart+0x90/0x7e0 arch/x86/kernel/signal.c:310
exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
irqentry_exit_to_user_mode+0x13f/0x280 kernel/entry/common.c:231
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623
RIP: 0033:0x7f47db97df01
Code: 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 48 3d 01 f0 ff ff 73 01 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f
RSP: 002b:0000000000000006 EFLAGS: 00010217
RAX: 0000000000000000 RBX: 00007f47dbb35f80 RCX: 00007f47db97def9
RDX: 00000000000000e8 RSI: 0000000000000006 RDI: 0000000100000001
RBP: 00007f47db9f0b76 R08: 0000000000000004 R09: 0000000000000000
R10: 0000000000000003 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f47dbb35f80 R15: 00007ffcd8ceb658