overlayfs: upper fs does not support tmpfile.
overlayfs: upper fs does not support RENAME_WHITEOUT.
overlayfs: failed to set xattr on upper
overlayfs: ...falling back to index=off,metacopy=off.
BUG: MAX_LOCKDEP_CHAINS too low!
turning off the locking correctness validator.
CPU: 0 PID: 6758 Comm: syz.1.573 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025
Call trace:
 dump_backtrace+0x1c8/0x1f4 arch/arm64/kernel/stacktrace.c:158
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:165
 __dump_stack+0x30/0x40 lib/dump_stack.c:88
 dump_stack_lvl+0xf8/0x160 lib/dump_stack.c:106
 dump_stack+0x1c/0x5c lib/dump_stack.c:113
 add_chain_cache kernel/locking/lockdep.c:-1 [inline]
 lookup_chain_cache_add kernel/locking/lockdep.c:3772 [inline]
 validate_chain kernel/locking/lockdep.c:3793 [inline]
 __lock_acquire+0x1b40/0x6544 kernel/locking/lockdep.c:5049
 lock_acquire+0x20c/0x644 kernel/locking/lockdep.c:5662
 seqcount_lockdep_reader_access include/linux/seqlock.h:102 [inline]
 ktime_get_coarse_real_ts64+0xe4/0x244 kernel/time/timekeeping.c:2261
 current_time+0x90/0x270 fs/inode.c:2538
 file_update_time+0xa0/0x2e0 fs/inode.c:2172
 __generic_file_write_iter+0xe0/0x37c mm/filemap.c:3923
 generic_file_write_iter+0xb4/0x2b0 mm/filemap.c:4006
 do_iter_readv_writev fs/read_write.c:-1 [inline]
 do_iter_write+0x530/0x91c fs/read_write.c:861
 vfs_iter_write+0x88/0xac fs/read_write.c:902
 iter_file_splice_write+0x500/0xa18 fs/splice.c:685
 do_splice_from fs/splice.c:763 [inline]
 direct_splice_actor+0xe4/0x134 fs/splice.c:950
 splice_direct_to_actor+0x3b4/0x978 fs/splice.c:896
 do_splice_direct+0x158/0x244 fs/splice.c:1002
 ovl_copy_up_file+0x2d4/0x460 fs/overlayfs/copy_up.c:269
 ovl_copy_up_data fs/overlayfs/copy_up.c:565 [inline]
 ovl_copy_up_workdir fs/overlayfs/copy_up.c:692 [inline]
 ovl_do_copy_up fs/overlayfs/copy_up.c:842 [inline]
 ovl_copy_up_one fs/overlayfs/copy_up.c:1013 [inline]
 ovl_copy_up_flags+0x1950/0x1e84 fs/overlayfs/copy_up.c:1059
 ovl_maybe_copy_up+0x150/0x180 fs/overlayfs/copy_up.c:1091
 ovl_open+0xe4/0x270 fs/overlayfs/file.c:152
 do_dentry_open+0x730/0xfa8 fs/open.c:882
 vfs_open+0x7c/0x90 fs/open.c:1013
 do_open fs/namei.c:3634 [inline]
 path_openat+0x1f48/0x2680 fs/namei.c:3791
 do_filp_open+0x174/0x344 fs/namei.c:3818
 do_sys_openat2+0x128/0x3d8 fs/open.c:1318
 do_sys_open fs/open.c:1334 [inline]
 __do_sys_openat fs/open.c:1350 [inline]
 __se_sys_openat fs/open.c:1345 [inline]
 __arm64_sys_openat+0x120/0x154 fs/open.c:1345
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2bc arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140
 do_el0_svc+0x58/0x13c arch/arm64/kernel/syscall.c:204
 el0_svc+0x58/0x138 arch/arm64/kernel/entry-common.c:637
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585