watchdog: BUG: soft lockup - CPU#0 stuck for 21s! [syz.4.12:4131]
Modules linked in:
irq event stamp: 20924
hardirqs last  enabled at (20923): [<ffff80001127f3e8>] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:168 [inline]
hardirqs last  enabled at (20923): [<ffff80001127f3e8>] _raw_spin_unlock_irq+0x98/0x128 kernel/locking/spinlock.c:202
hardirqs last disabled at (20924): [<ffff8000111a3e04>] enter_el1_irq_or_nmi+0x10/0x1c arch/arm64/kernel/entry-common.c:227
softirqs last  enabled at (9376): [<ffff80000819d0d8>] softirq_handle_end kernel/softirq.c:401 [inline]
softirqs last  enabled at (9376): [<ffff80000819d0d8>] handle_softirqs+0xa4c/0xbf0 kernel/softirq.c:586
softirqs last disabled at (9361): [<ffff80000819d6dc>] __do_softirq kernel/softirq.c:592 [inline]
softirqs last disabled at (9361): [<ffff80000819d6dc>] do_softirq_own_stack include/asm-generic/softirq_stack.h:10 [inline]
softirqs last disabled at (9361): [<ffff80000819d6dc>] invoke_softirq kernel/softirq.c:439 [inline]
softirqs last disabled at (9361): [<ffff80000819d6dc>] __irq_exit_rcu+0x240/0x440 kernel/softirq.c:641
CPU: 0 PID: 4131 Comm: syz.4.12 Not tainted 5.15.184-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : __sanitizer_cov_trace_const_cmp8+0x18/0xc0 kernel/kcov.c:301
lr : _compound_head include/linux/page-flags.h:198 [inline]
lr : PageDirty include/linux/page-flags.h:348 [inline]
lr : cancel_dirty_page include/linux/mm.h:1874 [inline]
lr : truncate_cleanup_page+0x1e0/0x414 mm/truncate.c:183
sp : ffff80001f597370
x29: ffff80001f597380 x28: 000000000000061e x27: ffff80001f5975b0
x26: 05ffc00000080835 x25: fffffc0003aeec48 x24: 1fffff800075dd91
x23: dfff800000000000 x22: 0000000000000000 x21: 05ffc00000080835
x20: fffffc0003aeec88 x19: fffffc0003aeec80 x18: 0000000000000000
x17: 0000000000000000 x16: ffff8000082bf2b8 x15: 0000000000000406
x14: 0000000000ff0100 x13: 1ffff0000282a06b x12: 0000000000ff0100
x11: 0000000000000000 x10: 0000000000000000 x9 : ffffffffffffffff
x8 : 0000000000000030 x7 : 0000000000000000 x6 : 0000000000000000
x5 : 0000000000000080 x4 : 0000000000000000 x3 : ffff8000086fb8bc
x2 : 0000000000000000 x1 : 0000000000000000 x0 : 0000000000000000
Call trace:
 __sanitizer_cov_trace_const_cmp8+0x18/0xc0 kernel/kcov.c:301
 truncate_inode_page+0x90/0xc8 mm/truncate.c:218
 shmem_undo_range+0x3c8/0x1234 mm/shmem.c:960
 shmem_truncate_range mm/shmem.c:1063 [inline]
 shmem_evict_inode+0x1c0/0x838 mm/shmem.c:1145
 evict+0x3c8/0x810 fs/inode.c:647
 iput_final fs/inode.c:1769 [inline]
 iput+0x6c4/0x77c fs/inode.c:1795
 dentry_unlink_inode+0x360/0x438 fs/dcache.c:380
 __dentry_kill+0x320/0x598 fs/dcache.c:586
 dentry_kill+0xc8/0x248 fs/dcache.c:-1
 dput+0x23c/0x458 fs/dcache.c:893
 __fput+0x494/0x7f8 fs/file_table.c:319
 ____fput+0x20/0x30 fs/file_table.c:339
 task_work_run+0x12c/0x1e0 kernel/task_work.c:188
 exit_task_work include/linux/task_work.h:33 [inline]
 do_exit+0x67c/0x1f58 kernel/exit.c:874
 do_group_exit+0x100/0x268 kernel/exit.c:996
 __do_sys_exit_group kernel/exit.c:1007 [inline]
 __se_sys_exit_group kernel/exit.c:1005 [inline]
 __wake_up_parent+0x0/0x60 kernel/exit.c:1005
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181
 el0_svc+0x78/0x1e0 arch/arm64/kernel/entry-common.c:608
 el0t_64_sync_handler+0xcc/0xe4 arch/arm64/kernel/entry-common.c:626
 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584