overlayfs: fs on './file0' does not support file handles, falling back to index=off,nfs_export=off.
BUG: sleeping function called from invalid context at ./include/linux/sched/mm.h:321
in_atomic(): 0, irqs_disabled(): 0, non_block: 0, pid: 7565, name: syz.0.472
preempt_count: 0, expected: 0
RCU nest depth: 1, expected: 0
4 locks held by syz.0.472/7565:
 #0: ffff888029c875f8 (&f->f_pos_lock){+.+.}-{4:4}, at: fdget_pos+0x247/0x310 fs/file.c:1213
 #1: ffff888058009888 (&ovl_i_mutex_dir_key[depth]){++++}-{4:4}, at: wrap_directory_iterator+0x5a/0xd0 fs/readdir.c:54
 #2: ffff8880328b0b88 (&type->i_mutex_dir_key#22){.+.+}-{4:4}, at: iterate_dir+0x4a6/0x760 fs/readdir.c:101
 #3: ffffffff8eb3a860 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
 #3: ffffffff8eb3a860 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline]
 #3: ffffffff8eb3a860 (rcu_read_lock){....}-{1:3}, at: afs_dynroot_readdir+0x466/0xbe0 fs/afs/dynroot.c:351
CPU: 0 UID: 0 PID: 7565 Comm: syz.0.472 Not tainted 6.14.0-syzkaller-03576-g1e1ba8d23dae #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
 __might_resched+0x558/0x6c0 kernel/sched/core.c:8797
 might_alloc include/linux/sched/mm.h:321 [inline]
 slab_pre_alloc_hook mm/slub.c:4089 [inline]
 slab_alloc_node mm/slub.c:4167 [inline]
 __do_kmalloc_node mm/slub.c:4317 [inline]
 __kmalloc_noprof+0xd0/0x4d0 mm/slub.c:4330
 kmalloc_noprof include/linux/slab.h:906 [inline]
 ovl_cache_entry_new+0x39/0x7b0 fs/overlayfs/readdir.c:152
 ovl_fill_lowest fs/overlayfs/readdir.c:211 [inline]
 ovl_fill_merge+0x2b8/0x830 fs/overlayfs/readdir.c:268
 dir_emit include/linux/fs.h:3853 [inline]
 afs_dynroot_readdir_cells fs/afs/dynroot.c:310 [inline]
 afs_dynroot_readdir+0x816/0xbe0 fs/afs/dynroot.c:352
 iterate_dir+0x5ab/0x760 fs/readdir.c:108
 ovl_dir_read+0xfe/0x570 fs/overlayfs/readdir.c:313
 ovl_dir_read_merged+0x4ae/0x5e0 fs/overlayfs/readdir.c:379
 ovl_cache_get fs/overlayfs/readdir.c:422 [inline]
 ovl_iterate+0x1196/0x21c0 fs/overlayfs/readdir.c:783
 wrap_directory_iterator+0x93/0xd0 fs/readdir.c:65
 iterate_dir+0x5ab/0x760 fs/readdir.c:108
 __do_sys_getdents64 fs/readdir.c:403 [inline]
 __se_sys_getdents64+0x1e4/0x4c0 fs/readdir.c:389
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f959bf8d169
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f959ce6f038 EFLAGS: 00000246 ORIG_RAX: 00000000000000d9
RAX: ffffffffffffffda RBX: 00007f959c1a5fa0 RCX: 00007f959bf8d169
RDX: 00000000000000ab RSI: 0000200000000040 RDI: 0000000000000003
RBP: 00007f959c00e2a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f959c1a5fa0 R15: 00007ffec2cd3518
 </TASK>
BUG: sleeping function called from invalid context at ./include/linux/sched/mm.h:321
in_atomic(): 0, irqs_disabled(): 0, non_block: 0, pid: 7565, name: syz.0.472
preempt_count: 0, expected: 0
RCU nest depth: 1, expected: 0
4 locks held by syz.0.472/7565:
 #0: ffff888029c875f8 (&f->f_pos_lock){+.+.}-{4:4}, at: fdget_pos+0x247/0x310 fs/file.c:1213
 #1: ffff888058009888 (&ovl_i_mutex_dir_key[depth]){++++}-{4:4}, at: wrap_directory_iterator+0x5a/0xd0 fs/readdir.c:54
 #2: ffff8880328b0b88 (&type->i_mutex_dir_key#22){.+.+}-{4:4}, at: iterate_dir+0x4a6/0x760 fs/readdir.c:101
 #3: ffffffff8eb3a860 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
 #3: ffffffff8eb3a860 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline]
 #3: ffffffff8eb3a860 (rcu_read_lock){....}-{1:3}, at: afs_dynroot_readdir+0x466/0xbe0 fs/afs/dynroot.c:351
CPU: 0 UID: 0 PID: 7565 Comm: syz.0.472 Tainted: G        W          6.14.0-syzkaller-03576-g1e1ba8d23dae #0 PREEMPT(full) 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
 __might_resched+0x558/0x6c0 kernel/sched/core.c:8797
 might_alloc include/linux/sched/mm.h:321 [inline]
 slab_pre_alloc_hook mm/slub.c:4089 [inline]
 slab_alloc_node mm/slub.c:4167 [inline]
 __do_kmalloc_node mm/slub.c:4317 [inline]
 __kmalloc_noprof+0xd0/0x4d0 mm/slub.c:4330
 kmalloc_noprof include/linux/slab.h:906 [inline]
 ovl_cache_entry_new+0x39/0x7b0 fs/overlayfs/readdir.c:152
 ovl_fill_lowest fs/overlayfs/readdir.c:211 [inline]
 ovl_fill_merge+0x2b8/0x830 fs/overlayfs/readdir.c:268
 dir_emit include/linux/fs.h:3853 [inline]
 afs_dynroot_readdir_cells fs/afs/dynroot.c:316 [inline]
 afs_dynroot_readdir+0x94b/0xbe0 fs/afs/dynroot.c:352
 iterate_dir+0x5ab/0x760 fs/readdir.c:108
 ovl_dir_read+0xfe/0x570 fs/overlayfs/readdir.c:313
 ovl_dir_read_merged+0x4ae/0x5e0 fs/overlayfs/readdir.c:379
 ovl_cache_get fs/overlayfs/readdir.c:422 [inline]
 ovl_iterate+0x1196/0x21c0 fs/overlayfs/readdir.c:783
 wrap_directory_iterator+0x93/0xd0 fs/readdir.c:65
 iterate_dir+0x5ab/0x760 fs/readdir.c:108
 __do_sys_getdents64 fs/readdir.c:403 [inline]
 __se_sys_getdents64+0x1e4/0x4c0 fs/readdir.c:389
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f959bf8d169
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f959ce6f038 EFLAGS: 00000246 ORIG_RAX: 00000000000000d9
RAX: ffffffffffffffda RBX: 00007f959c1a5fa0 RCX: 00007f959bf8d169
RDX: 00000000000000ab RSI: 0000200000000040 RDI: 0000000000000003
RBP: 00007f959c00e2a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f959c1a5fa0 R15: 00007ffec2cd3518
 </TASK>