INFO: task syz.4.1865:6273 blocked for more than 122 seconds.
Not tainted 6.12.38-syzkaller-ge5a17398e40d #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.4.1865 state:D stack:0 pid:6273 tgid:6272 ppid:1307 flags:0x00004004
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
super_lock+0x150/0x300 fs/super.c:115
super_lock_shared fs/super.c:140 [inline]
iterate_supers+0x8a/0x560 fs/super.c:934
quota_sync_all fs/quota/quota.c:69 [inline]
__do_sys_quotactl fs/quota/quota.c:938 [inline]
__se_sys_quotactl+0x308/0x7d0 fs/quota/quota.c:917
__x64_sys_quotactl+0x9f/0xc0 fs/quota/quota.c:917
x64_sys_call+0x2818/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:180
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0x58/0xf0 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7f4096b8ebe9
RSP: 002b:00007f4097940038 EFLAGS: 00000246 ORIG_RAX: 00000000000000b3
RAX: ffffffffffffffda RBX: 00007f4096db5fa0 RCX: 00007f4096b8ebe9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff80000101
RBP: 00007f4096c11e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f4096db6038 R14: 00007f4096db5fa0 R15: 00007ffee206dc18
INFO: task syz.4.1865:6284 blocked for more than 123 seconds.
Not tainted 6.12.38-syzkaller-ge5a17398e40d #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.4.1865 state:D stack:0 pid:6284 tgid:6272 ppid:1307 flags:0x00004004
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
super_lock+0x150/0x300 fs/super.c:115
super_lock_shared fs/super.c:140 [inline]
iterate_supers+0x8a/0x560 fs/super.c:934
quota_sync_all fs/quota/quota.c:69 [inline]
__do_sys_quotactl fs/quota/quota.c:938 [inline]
__se_sys_quotactl+0x308/0x7d0 fs/quota/quota.c:917
__x64_sys_quotactl+0x9f/0xc0 fs/quota/quota.c:917
x64_sys_call+0x2818/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:180
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0x58/0xf0 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7f4096b8ebe9
RSP: 002b:00007f409791f038 EFLAGS: 00000246 ORIG_RAX: 00000000000000b3
RAX: ffffffffffffffda RBX: 00007f4096db6090 RCX: 00007f4096b8ebe9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff80000100
RBP: 00007f4096c11e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f4096db6128 R14: 00007f4096db6090 R15: 00007ffee206dc18
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 37 Comm: khungtaskd Not tainted 6.12.38-syzkaller-ge5a17398e40d #0 cff9d6c8e1f79ff946f02ca62e3ab2973be10fb4
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
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 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 11689 Comm: syz.8.3483 Not tainted 6.12.38-syzkaller-ge5a17398e40d #0 cff9d6c8e1f79ff946f02ca62e3ab2973be10fb4
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:__kasan_check_read+0x8/0x20 mm/kasan/shadow.c:31
Code: c7 f8 f5 f2 86 48 89 de e8 55 93 28 ff 45 31 ff eb c9 b8 bb 30 7b 5e 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 55 48 89 e5 <89> f6 48 8b 4d 08 31 d2 e8 ab e4 ff ff 5d c3 cc cc cc cc cc 0f 1f
RSP: 0018:ffffc9000e42feb8 EFLAGS: 00000046
RAX: ffffffff813c801c RBX: ffff8881208eb900 RCX: 0000000000080000
RDX: ffffc900125e0000 RSI: 0000000000000008 RDI: ffff8881208eb900
RBP: ffffc9000e42feb8 R08: ffff8881208eb907 R09: 1ffff1102411d720
R10: dffffc0000000000 R11: ffffed102411d721 R12: 0000000000000000
R13: 0000000000000000 R14: ffff8881208eb900 R15: dffffc0000000000
FS: 00007f2576a5b6c0(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fb165183ad8 CR3: 000000012af2c000 CR4: 00000000003526b0
Call Trace:
instrument_atomic_read include/linux/instrumented.h:68 [inline]
_test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline]
test_ti_thread_flag include/linux/thread_info.h:118 [inline]
fpregs_assert_state_consistent+0x32/0xe0 arch/x86/kernel/fpu/core.c:819
arch_exit_work arch/x86/include/asm/entry-common.h:56 [inline]
arch_exit_to_user_mode_prepare+0x22/0x70 arch/x86/include/asm/entry-common.h:65
exit_to_user_mode_prepare include/linux/entry-common.h:330 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
syscall_exit_to_user_mode+0x98/0xb0 kernel/entry/common.c:218
do_syscall_64+0x64/0xf0 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7f2575a4d9b0
Code: 44 24 20 0f 29 44 24 30 0f 29 44 24 40 48 8b 44 24 08 ff d0 48 83 c4 50 31 c0 5b 5d 41 5c 41 5d 41 5e c3 0f 1f 80 00 00 00 00 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 c3 66 66 2e 0f 1f
RSP: 002b:00007f2576a5ab38 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 00007f2575db6098 RCX: 00007f2575b8ebe9
RDX: 00007f2576a5ab40 RSI: 00007f2576a5ac70 RDI: 0000000000000011
RBP: 00007f2575db6090 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f2575db6128 R14: 00007ffce53ea010 R15: 00007ffce53ea0f8