FAULT_INJECTION: forcing a failure.
name failslab, interval 1, probability 0, space 0, times 1
CPU: 0 UID: 0 PID: 5333 Comm: syz.0.0 Not tainted 6.12.0-syzkaller-09073-g9f16d5e6f220 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
 fail_dump lib/fault-inject.c:53 [inline]
 should_fail_ex+0x3b0/0x4e0 lib/fault-inject.c:154
 should_failslab+0xac/0x100 mm/failslab.c:46
 slab_pre_alloc_hook mm/slub.c:4038 [inline]
 slab_alloc_node mm/slub.c:4114 [inline]
 __kmalloc_cache_noprof+0x6c/0x2c0 mm/slub.c:4290
 kmalloc_noprof include/linux/slab.h:879 [inline]
 kzalloc_noprof include/linux/slab.h:1015 [inline]
 ovl_encode_real_fh+0xdf/0x410 fs/overlayfs/copy_up.c:431
 ovl_dentry_to_fid fs/overlayfs/export.c:239 [inline]
 ovl_encode_fh+0x388/0xc20 fs/overlayfs/export.c:274
 exportfs_encode_inode_fh fs/exportfs/expfs.c:392 [inline]
 exportfs_encode_fh+0x1bd/0x3e0 fs/exportfs/expfs.c:421
 ovl_encode_real_fh+0x129/0x410 fs/overlayfs/copy_up.c:441
 ovl_get_index_name fs/overlayfs/namei.c:741 [inline]
 ovl_lookup_index+0x71/0x6e0 fs/overlayfs/namei.c:790
 ovl_lookup+0x1d6b/0x2a60 fs/overlayfs/namei.c:1271
 lookup_one_qstr_excl+0x11f/0x260 fs/namei.c:1692
 filename_create+0x297/0x540 fs/namei.c:4081
 do_mkdirat+0xbd/0x3a0 fs/namei.c:4326
 __do_sys_mkdir fs/namei.c:4354 [inline]
 __se_sys_mkdir fs/namei.c:4352 [inline]
 __x64_sys_mkdir+0x6c/0x80 fs/namei.c:4352
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fdc4137e819
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:00007fdc421ca038 EFLAGS: 00000246 ORIG_RAX: 0000000000000053
RAX: ffffffffffffffda RBX: 00007fdc41535fa0 RCX: 00007fdc4137e819
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000200002c0
RBP: 00007fdc421ca090 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000002
R13: 0000000000000000 R14: 00007fdc41535fa0 R15: 00007ffe2133b1d8
 </TASK>
------------[ cut here ]------------
WARNING: CPU: 0 PID: 5333 at fs/overlayfs/copy_up.c:447 ovl_encode_real_fh+0x2e2/0x410 fs/overlayfs/copy_up.c:447
Modules linked in:
CPU: 0 UID: 0 PID: 5333 Comm: syz.0.0 Not tainted 6.12.0-syzkaller-09073-g9f16d5e6f220 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
RIP: 0010:ovl_encode_real_fh+0x2e2/0x410 fs/overlayfs/copy_up.c:447
Code: 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc e8 45 ce 80 fe 90 0f 0b 90 eb 14 e8 3a ce 80 fe 90 0f 0b 90 eb 09 e8 2f ce 80 fe 90 <0f> 0b 90 4c 89 ff e8 93 71 df fe 49 c7 c7 fb ff ff ff eb 8b 89 d1
RSP: 0018:ffffc9000d4d7840 EFLAGS: 00010293
RAX: ffffffff831511e1 RBX: 1ffff92001a9af10 RCX: ffff88801ee92440
RDX: 0000000000000000 RSI: 00000000000000ff RDI: 00000000000000ff
RBP: ffffc9000d4d78f0 R08: ffffffff8315107c R09: 1ffffffff203a9fe
R10: dffffc0000000000 R11: fffffbfff203a9ff R12: 00000000000000ff
R13: 0000000000000080 R14: 1ffff92001a9af0c R15: ffff88801eff8e00
FS:  00007fdc421ca6c0(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fdc4206d9b8 CR3: 0000000043e38000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 ovl_get_index_name fs/overlayfs/namei.c:741 [inline]
 ovl_lookup_index+0x71/0x6e0 fs/overlayfs/namei.c:790
 ovl_lookup+0x1d6b/0x2a60 fs/overlayfs/namei.c:1271
 lookup_one_qstr_excl+0x11f/0x260 fs/namei.c:1692
 filename_create+0x297/0x540 fs/namei.c:4081
 do_mkdirat+0xbd/0x3a0 fs/namei.c:4326
 __do_sys_mkdir fs/namei.c:4354 [inline]
 __se_sys_mkdir fs/namei.c:4352 [inline]
 __x64_sys_mkdir+0x6c/0x80 fs/namei.c:4352
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fdc4137e819
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:00007fdc421ca038 EFLAGS: 00000246 ORIG_RAX: 0000000000000053
RAX: ffffffffffffffda RBX: 00007fdc41535fa0 RCX: 00007fdc4137e819
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000200002c0
RBP: 00007fdc421ca090 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000002
R13: 0000000000000000 R14: 00007fdc41535fa0 R15: 00007ffe2133b1d8
 </TASK>