INFO: task udevd:27433 blocked for more than 122 seconds.
Not tainted 6.12.30-syzkaller-g94ce385c22d5 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:udevd state:D stack:0 pid:27433 tgid:27433 ppid:110 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5924 [inline]
__schedule+0x145b/0x1f10 kernel/sched/core.c:7750
__schedule_loop kernel/sched/core.c:7831 [inline]
schedule+0xc6/0x240 kernel/sched/core.c:7846
schedule_preempt_disabled+0x14/0x30 kernel/sched/core.c:7903
__mutex_lock_common kernel/locking/mutex.c:692 [inline]
__mutex_lock+0x836/0x1b60 kernel/locking/mutex.c:786
__mutex_lock_slowpath+0xe/0x20 kernel/locking/mutex.c:1117
mutex_lock+0x102/0x1c0 kernel/locking/mutex.c:270
bdev_open+0xd5/0xd60 block/bdev.c:909
blkdev_open+0x3d1/0x560 block/fops.c:627
do_dentry_open+0x97b/0x1510 fs/open.c:960
vfs_open+0x86/0x230 fs/open.c:1090
do_open fs/namei.c:3774 [inline]
path_openat+0x2b6c/0x34b0 fs/namei.c:3933
do_filp_open+0x1c6/0x3e0 fs/namei.c:3960
do_sys_openat2+0x12c/0x1c0 fs/open.c:1438
do_sys_open fs/open.c:1453 [inline]
__do_sys_openat fs/open.c:1469 [inline]
__se_sys_openat fs/open.c:1464 [inline]
__x64_sys_openat+0x13a/0x170 fs/open.c:1464
x64_sys_call+0xe69/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:258
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: 0033:0x7fef568a7407
RSP: 002b:00007ffc229b1f70 EFLAGS: 00000202 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007fef57073880 RCX: 00007fef568a7407
RDX: 00000000000a0800 RSI: 0000563dcc413720 RDI: ffffffffffffff9c
RBP: 0000563dcc4102c0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 0000563dcc651050
R13: 0000563dcc655990 R14: 0000000000000000 R15: 0000563dcc651050
INFO: task syz-executor:28312 blocked for more than 123 seconds.
Not tainted 6.12.30-syzkaller-g94ce385c22d5 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor state:D stack:0 pid:28312 tgid:28312 ppid:1 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5924 [inline]
__schedule+0x145b/0x1f10 kernel/sched/core.c:7750
__schedule_loop kernel/sched/core.c:7831 [inline]
schedule+0xc6/0x240 kernel/sched/core.c:7846
schedule_preempt_disabled+0x14/0x30 kernel/sched/core.c:7903
__mutex_lock_common kernel/locking/mutex.c:692 [inline]
__mutex_lock+0x836/0x1b60 kernel/locking/mutex.c:786
__mutex_lock_slowpath+0xe/0x20 kernel/locking/mutex.c:1117
mutex_lock+0x102/0x1c0 kernel/locking/mutex.c:270
bdev_open+0xd5/0xd60 block/bdev.c:909
blkdev_open+0x3d1/0x560 block/fops.c:627
do_dentry_open+0x97b/0x1510 fs/open.c:960
vfs_open+0x86/0x230 fs/open.c:1090
do_open fs/namei.c:3774 [inline]
path_openat+0x2b6c/0x34b0 fs/namei.c:3933
do_filp_open+0x1c6/0x3e0 fs/namei.c:3960
do_sys_openat2+0x12c/0x1c0 fs/open.c:1438
do_sys_open fs/open.c:1453 [inline]
__do_sys_openat fs/open.c:1469 [inline]
__se_sys_openat fs/open.c:1464 [inline]
__x64_sys_openat+0x13a/0x170 fs/open.c:1464
x64_sys_call+0xe69/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:258
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: 0033:0x7f2009d8d211
RSP: 002b:00007fff753c7920 EFLAGS: 00000202 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007f2009d8d211
RDX: 0000000000000002 RSI: 00007fff753c7a30 RDI: 00000000ffffff9c
RBP: 00007fff753c7a30 R08: 000000000000000a R09: 00007fff753c76e7
R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000000
R13: 00007f2009f7e260 R14: 0000000000000003 R15: 00007fff753c7a30
INFO: task syz.9.9416:28323 blocked for more than 123 seconds.
Not tainted 6.12.30-syzkaller-g94ce385c22d5 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.9.9416 state:D stack:0 pid:28323 tgid:28322 ppid:27353 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5924 [inline]
__schedule+0x145b/0x1f10 kernel/sched/core.c:7750
__schedule_loop kernel/sched/core.c:7831 [inline]
schedule+0xc6/0x240 kernel/sched/core.c:7846
io_schedule+0x89/0xe0 kernel/sched/core.c:8658
folio_wait_bit_common+0x6ae/0x910 mm/filemap.c:1336
folio_put_wait_locked mm/filemap.c:1500 [inline]
do_read_cache_folio+0x14d/0x4d0 mm/filemap.c:3880
read_cache_folio+0x54/0x90 mm/filemap.c:3930
read_mapping_folio include/linux/pagemap.h:1019 [inline]
read_part_sector+0xcc/0x250 block/partitions/core.c:716
msdos_partition+0x118/0x3000 block/partitions/msdos.c:592
check_partition block/partitions/core.c:138 [inline]
blk_add_partitions block/partitions/core.c:583 [inline]
bdev_disk_changed+0x81c/0x1610 block/partitions/core.c:687
loop_reread_partitions+0x64/0x110 drivers/block/loop.c:464
loop_configure+0xfd8/0x1320 drivers/block/loop.c:1071
lo_ioctl+0x76c/0x20a0 drivers/block/loop.c:-1
blkdev_ioctl+0x549/0x680 block/ioctl.c:693
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:907 [inline]
__se_sys_ioctl+0x135/0x1b0 fs/ioctl.c:893
__x64_sys_ioctl+0x7f/0xa0 fs/ioctl.c:893
x64_sys_call+0x1878/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:17
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: 0033:0x7fedfc38e929
RSP: 002b:00007fedfd14f038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fedfc5b5fa0 RCX: 00007fedfc38e929
RDX: 00002000000002c0 RSI: 0000000000004c0a RDI: 0000000000000008
RBP: 00007fedfc410b39 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fedfc5b5fa0 R15: 00007ffd40f14ad8
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 37 Comm: khungtaskd Not tainted 6.12.30-syzkaller-g94ce385c22d5 #0 16e511e29439c8b2668c1520ec6e7e54ef5e5f6a
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
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:229 [inline]
watchdog+0xd8f/0xed0 kernel/hung_task.c:385
kthread+0x2ca/0x370 kernel/kthread.c:389
ret_from_fork+0x64/0xa0 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: 29738 Comm: syz-executor Not tainted 6.12.30-syzkaller-g94ce385c22d5 #0 16e511e29439c8b2668c1520ec6e7e54ef5e5f6a
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:context_struct_compute_av+0x92f/0x1680 security/selinux/ss/services.c:653
Code: 12 ff 4d 8d 77 38 4c 89 f0 48 c1 e8 03 42 0f b6 04 28 84 c0 0f 85 a4 00 00 00 41 03 1e 48 8b 84 24 88 00 00 00 42 0f b6 04 28 <84> c0 75 35 48 8b 44 24 28 3b 18 0f 83 a8 00 00 00 e8 4b be 12 ff
RSP: 0018:ffffc90003b07240 EFLAGS: 00000202
RAX: 0000000000000000 RBX: 00000000000002c8 RCX: ffff888150810000
RDX: 0000000000000000 RSI: 0000000000000100 RDI: 0000000000000180
RBP: ffffc90003b07500 R08: ffff888150810000 R09: 0000000000000003
R10: 0000000000000004 R11: 0000000000000000 R12: 0000000000000100
R13: dffffc0000000000 R14: 1ffff110213ffa7f R15: ffff888109ffd3c0
FS: 000055558e4ae500(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fd397781178 CR3: 0000000121bf2000 CR4: 00000000003526b0
DR0: 0000000000000007 DR1: 000000000000000b DR2: 0000000000000002
DR3: 0000000000000009 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
security_compute_av+0x38d/0xfa0 security/selinux/ss/services.c:1146
avc_compute_av+0x89/0x770 security/selinux/avc.c:994
avc_perm_nonode+0xc8/0x1b0 security/selinux/avc.c:1118
avc_has_perm_noaudit+0x21c/0x360 security/selinux/avc.c:1161
selinux_inode_permission+0x364/0x5a0 security/selinux/hooks.c:3118
security_inode_permission+0xaa/0x120 security/security.c:2324
inode_permission+0xf3/0x4c0 fs/namei.c:543
may_lookup fs/namei.c:1760 [inline]
link_path_walk+0x221/0xec0 fs/namei.c:2366
path_openat+0x281/0x34b0 fs/namei.c:3929
do_filp_open+0x1c6/0x3e0 fs/namei.c:3960
do_sys_openat2+0x12c/0x1c0 fs/open.c:1438
do_sys_open fs/open.c:1453 [inline]
__do_sys_openat fs/open.c:1469 [inline]
__se_sys_openat fs/open.c:1464 [inline]
__x64_sys_openat+0x13a/0x170 fs/open.c:1464
x64_sys_call+0xe69/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:258
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: 0033:0x7fb10398d211
Code: 75 57 89 f0 25 00 00 41 00 3d 00 00 41 00 74 49 80 3d 3a 83 1f 00 00 74 6d 89 da 48 89 ee bf 9c ff ff ff b8 01 01 00 00 0f 05 <48> 3d 00 f0 ff ff 0f 87 93 00 00 00 48 8b 54 24 28 64 48 2b 14 25
RSP: 002b:00007ffd937abf10 EFLAGS: 00000202 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fb10398d211
RDX: 0000000000000000 RSI: 00007ffd937ac040 RDI: 00000000ffffff9c
RBP: 00007ffd937ac040 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 00007ffd937ad0d0
R13: 00007fb103a10925 R14: 000055558e4ae4a8 R15: 0000000000000005