syzbot

loop0: detected capacity change from 0 to 16
erofs: (device loop0): mounted with root inode @ nid 36.
erofs: (device loop0): z_erofs_readpage: failed to read, err [-95]
BUG: sleeping function called from invalid context at fs/dcache.c:877
in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 4317, name: syz.0.17
1 lock held by syz.0.17/4317:
 #0: ffff88805c070180 (&type->i_mutex_dir_key#8/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:822 [inline]
 #0: ffff88805c070180 (&type->i_mutex_dir_key#8/1){+.+.}-{3:3}, at: filename_create+0x208/0x470 fs/namei.c:3843
Preemption disabled at:
[<ffffffff8398fb97>] kmap_atomic include/linux/highmem-internal.h:196 [inline]
[<ffffffff8398fb97>] z_erofs_reload_indexes+0x347/0x590 fs/erofs/zmap.c:146
CPU: 1 PID: 4317 Comm: syz.0.17 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
Call Trace:
 <TASK>
 dump_stack_lvl+0x188/0x250 lib/dump_stack.c:106
 ___might_sleep+0x493/0x610 kernel/sched/core.c:9658
 dput+0x26/0x1a0 fs/dcache.c:877
 lookup_one_qstr_excl+0x1d6/0x240 fs/namei.c:1573
 filename_create+0x23a/0x470 fs/namei.c:3844
 do_mknodat+0x26f/0x630 fs/namei.c:3989
 __do_sys_mknodat fs/namei.c:4030 [inline]
 __se_sys_mknodat fs/namei.c:4027 [inline]
 __x64_sys_mknodat+0xa5/0xc0 fs/namei.c:4027
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f0b5693ecb9
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffd038e4e88 EFLAGS: 00000246 ORIG_RAX: 0000000000000103
RAX: ffffffffffffffda RBX: 00007f0b56bb9fa0 RCX: 00007f0b5693ecb9
RDX: 0000000000001000 RSI: 0000200000000040 RDI: ffffffffffffff9c
RBP: 00007f0b569acbf7 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f0b56bb9fac R14: 00007f0b56bb9fa0 R15: 00007f0b56bb9fa0
 </TASK>
BUG: scheduling while atomic: syz.0.17/4317/0x00000002
no locks held by syz.0.17/4317.
Modules linked in:
Preemption disabled at:
[<ffffffff8398fb97>] kmap_atomic include/linux/highmem-internal.h:196 [inline]
[<ffffffff8398fb97>] z_erofs_reload_indexes+0x347/0x590 fs/erofs/zmap.c:146