watchdog: BUG: soft lockup - CPU#0 stuck for 26s! [syz-executor:7270]
Modules linked in:
irq event stamp: 324906
hardirqs last  enabled at (324905): [<ffff80008b0047cc>] __exit_to_kernel_mode arch/arm64/kernel/entry-common.c:86 [inline]
hardirqs last  enabled at (324905): [<ffff80008b0047cc>] exit_to_kernel_mode+0xc0/0xf0 arch/arm64/kernel/entry-common.c:96
hardirqs last disabled at (324906): [<ffff80008b001c0c>] __el1_irq arch/arm64/kernel/entry-common.c:650 [inline]
hardirqs last disabled at (324906): [<ffff80008b001c0c>] el1_interrupt+0x24/0x54 arch/arm64/kernel/entry-common.c:668
softirqs last  enabled at (324900): [<ffff8000803d88a0>] softirq_handle_end kernel/softirq.c:425 [inline]
softirqs last  enabled at (324900): [<ffff8000803d88a0>] handle_softirqs+0xaf8/0xc88 kernel/softirq.c:607
softirqs last disabled at (324895): [<ffff800080022028>] __do_softirq+0x14/0x20 kernel/softirq.c:613
CPU: 0 UID: 0 PID: 7270 Comm: syz-executor Not tainted syzkaller #0 PREEMPT 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025
pstate: 63400005 (nZCv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--)
pc : will_be_unmounted fs/pnode.c:70 [inline]
pc : propagation_source fs/pnode.c:78 [inline]
pc : change_mnt_propagation+0x10c/0x77c fs/pnode.c:114
lr : propagation_source fs/pnode.c:78 [inline]
lr : change_mnt_propagation+0x120/0x77c fs/pnode.c:114
sp : ffff8000a3a37a90
x29: ffff8000a3a37ac0 x28: dfff800000000000 x27: ffff0000cad0e460
x26: ffff0000cad0e4b0 x25: 1fffe000195a1c96 x24: ffff0000cad0e418
x23: ffff0000f1a416f0 x22: ffff0000cad0e380 x21: ffff0000cad0e380
x20: 0000000000040000 x19: ffff0000f1a416c0 x18: 1fffe0003379be88
x17: ffff80008f7be000 x16: ffff80008af6dd88 x15: 0000000000000002
x14: 1fffe000195a1c8f x13: 0000000000000000 x12: 0000000000000000
x11: ffff6000195a1c91 x10: 0000000000ff0100 x9 : 0000000000000003
x8 : 0000000000000000 x7 : 0000000000000000 x6 : 0000000000000000
x5 : 0000000000000001 x4 : 0000000000000008 x3 : 0000000000000000
x2 : 0000000000000008 x1 : 0000000000000001 x0 : 0000000000000000
Call trace:
 will_be_unmounted fs/pnode.c:70 [inline] (P)
 propagation_source fs/pnode.c:78 [inline] (P)
 change_mnt_propagation+0x10c/0x77c fs/pnode.c:114 (P)
 umount_tree+0x7e4/0xbbc fs/namespace.c:1872
 do_umount fs/namespace.c:-1 [inline]
 path_umount+0x90c/0x980 fs/namespace.c:2095
 ksys_umount fs/namespace.c:2118 [inline]
 __do_sys_umount fs/namespace.c:2123 [inline]
 __se_sys_umount fs/namespace.c:2121 [inline]
 __arm64_sys_umount+0x128/0x174 fs/namespace.c:2121
 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49
 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132
 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151
 el0_svc+0x58/0x180 arch/arm64/kernel/entry-common.c:879
 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:898
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 6165 Comm: udevd Not tainted syzkaller #0 PREEMPT 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025
pstate: 43400005 (nZcv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--)
pc : __sanitizer_cov_trace_pc+0x50/0x84 kernel/kcov.c:217
lr : path_init+0xdc0/0xe98 fs/namei.c:2537
sp : ffff8000a0fe77a0
x29: ffff8000a0fe7810 x28: dfff800000000000 x27: 1fffe000193daaa4
x26: ffff0000c9ed5520 x25: 0000000000000101 x24: 1ffff000141fcf2b
x23: ffff80008f745840 x22: ffff8000a0fe795c x21: 0000000000000100
x20: ffff8000a0fe7920 x19: 000000000004bf05 x18: 0000000000000000
x17: 0000000000000000 x16: ffff80008b007180 x15: 0000000000000001
x14: 1ffff00011ee8b08 x13: 0000000000000000 x12: 0000000000000000
x11: ffff700011ee8b09 x10: 0000000000ff0100 x9 : 0000000000000000
x8 : ffff0000c51d5b80 x7 : ffff800080daa408 x6 : 0000000000000000
x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff800080da89c8
x2 : 0000000000000000 x1 : 0000000000000004 x0 : 0000000000000001
Call trace:
 check_kcov_mode kernel/kcov.c:185 [inline] (P)
 __sanitizer_cov_trace_pc+0x50/0x84 kernel/kcov.c:217 (P)
 path_lookupat+0x40/0x3d0 fs/namei.c:2644
 filename_lookup+0x1ac/0x454 fs/namei.c:2683
 vfs_statx+0xec/0x4bc fs/stat.c:353
 vfs_fstatat+0x100/0x150 fs/stat.c:375
 __do_sys_newfstatat fs/stat.c:542 [inline]
 __se_sys_newfstatat fs/stat.c:536 [inline]
 __arm64_sys_newfstatat+0x100/0x180 fs/stat.c:536
 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49
 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132
 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151
 el0_svc+0x58/0x180 arch/arm64/kernel/entry-common.c:879
 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:898
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596