INFO: task syz.1.29997:2796 blocked for more than 122 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.29997 state:D stack:0 pid:2796 tgid:2788 ppid:30612 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:5945 [inline]
__schedule+0x1322/0x1df0 kernel/sched/core.c:7791
__schedule_loop kernel/sched/core.c:7872 [inline]
schedule+0xc6/0x240 kernel/sched/core.c:7887
schedule_timeout+0xb2/0x3a0 kernel/time/timer.c:2595
do_wait_for_common kernel/sched/completion.c:95 [inline]
__wait_for_common kernel/sched/completion.c:116 [inline]
wait_for_common+0x359/0x630 kernel/sched/completion.c:127
wait_for_completion_state+0x19/0x40 kernel/sched/completion.c:264
coredump_wait fs/coredump.c:419 [inline]
do_coredump+0x7cf/0x2bd0 fs/coredump.c:581
get_signal+0x11fd/0x14f0 kernel/signal.c:2918
arch_do_signal_or_restart+0x96/0x720 arch/x86/kernel/signal.c:337
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+0x4e/0xb0 kernel/entry/common.c:231
irqentry_exit+0x16/0x60 kernel/entry/common.c:334
exc_invalid_op+0x42/0x60 arch/x86/kernel/traps.c:354
asm_exc_invalid_op+0x1f/0x30 arch/x86/include/asm/idtentry.h:621
RIP: 0033:0x200000000000
RSP: 002b:00007fa117c34a78 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 00007fa116fe6090 RCX: 00007fa116d8f6c9
RDX: 00007fa117c34a80 RSI: 00007fa117c34bb0 RDI: 000000000000000d
RBP: 00007fa116e11f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000004 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fa116fe6128 R14: 00007fa116fe6090 R15: 00007fff04c290a8
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 37 Comm: khungtaskd Not tainted syzkaller #0 0b5ffdee5fcd2f7749818d1ff954e9c21353764e
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
Call Trace:
__dump_stack+0x21/0x30 lib/dump_stack.c:94
dump_stack_lvl+0x10c/0x190 lib/dump_stack.c:120
dump_stack+0x19/0x20 lib/dump_stack.c:129
nmi_cpu_backtrace+0x2bf/0x2d0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x142/0x2c0 lib/nmi_backtrace.c:62
arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:41
trigger_all_cpu_backtrace include/linux/nmi.h:158 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:267 [inline]
watchdog+0xd8f/0xed0 kernel/hung_task.c:423
kthread+0x2ca/0x370 kernel/kthread.c:389
ret_from_fork+0x67/0xa0 arch/x86/kernel/process.c:153
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: 8127 Comm: syz.4.32518 Not tainted syzkaller #0 0b5ffdee5fcd2f7749818d1ff954e9c21353764e
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
RIP: 0010:__sanitizer_cov_trace_pc+0x5/0x70 kernel/kcov.c:210
Code: e8 10 5f 52 00 5b 5d e9 c9 bc 09 04 cc cc cc cc cc cc cc cc cc b8 e7 e0 64 1c 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 55 <48> 89 e5 48 8b 45 08 65 48 8b 0c 25 00 eb 04 00 65 8b 15 3c ec 7e
RSP: 0018:ffffc90000edeeb0 EFLAGS: 00000206
RAX: ffffffff8586c0b0 RBX: ffff88816d9d8840 RCX: ffff888178e50000
RDX: 0000000000000000 RSI: 00007f04c0494000 RDI: 00007f04c0d1dfff
RBP: ffffc90000edf030 R08: ffff888178e50000 R09: 0000000000000003
R10: 0000000000000003 R11: 0000000000000000 R12: 00007f04c0d1dfff
R13: 0000000000000007 R14: 00007f04c0494000 R15: fffffffffffffff3
FS: 0000000000000000(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f7331286f98 CR3: 00000001896b2000 CR4: 00000000003526b0
Call Trace:
find_vma+0xcd/0x110 mm/mmap.c:986
gup_vma_lookup mm/gup.c:1359 [inline]
__get_user_pages+0x3d1/0x22d0 mm/gup.c:1476
__get_user_pages_locked mm/gup.c:1774 [inline]
get_dump_page+0x107/0x220 mm/gup.c:2292
dump_user_range+0x181/0xdf0 fs/coredump.c:949
elf_core_dump+0x2ccc/0x3800 fs/binfmt_elf.c:2143
do_coredump+0x1bfa/0x2bd0 fs/coredump.c:764
get_signal+0x11fd/0x14f0 kernel/signal.c:2918
arch_do_signal_or_restart+0x96/0x720 arch/x86/kernel/signal.c:337
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+0x4e/0xb0 kernel/entry/common.c:231
irqentry_exit+0x16/0x60 kernel/entry/common.c:334
exc_page_fault+0x66/0xc0 arch/x86/mm/fault.c:1542
asm_exc_page_fault+0x2b/0x30 arch/x86/include/asm/idtentry.h:623
RIP: 0033:0x7f04bfe4f6b7
Code: 88 15 42 60 ec 00 88 05 3f 60 ec 00 c3 50 48 8d 35 e9 28 1c 00 48 8d 3d ef 28 1c 00 31 c0 e8 20 f7 ff ff 53 89 fb 48 83 ec 10 <64> 8b 04 25 94 ff ff ff 85 c0 74 2a 89 fe 31 c0 bf 3c 00 00 00 e8
RSP: 002b:00007f04c0eb9120 EFLAGS: 00010202
RAX: 0000000000000000 RBX: 000000000000000b RCX: 00007f04bff8f6c9
RDX: 00007f04c0eb9140 RSI: 00007f04c0eb9270 RDI: 000000000000000b
RBP: 00007f04c0011f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 00007f04c01e6038 R14: 00007f04c01e5fa0 R15: 00007ffe210d2e18