EXT4-fs error (device loop0): ext4_fill_super:4942: inode #2: comm syz-executor.0: iget: root inode unallocated
EXT4-fs (loop0): get root inode failed
EXT4-fs (loop0): mount failed
------------[ cut here ]------------
WARNING: CPU: 1 PID: 5678 at lib/debugobjects.c:505 debug_print_object+0xb0/0xc4 lib/debugobjects.c:505
ODEBUG: free active (active state 0) object type: timer_list hint: print_daily_error_info+0x0/0x15c fs/ext4/super.c:1342
Modules linked in:
Kernel panic - not syncing: panic_on_warn set ...
CPU: 1 PID: 5678 Comm: syz-executor.0 Not tainted 5.12.0-rc3-syzkaller #0
Hardware name: ARM-Versatile Express
Backtrace: 
[<81802550>] (dump_backtrace) from [<818027c4>] (show_stack+0x18/0x1c arch/arm/kernel/traps.c:252)
 r7:00000080 r6:60000093 r5:00000000 r4:82b58344
[<818027ac>] (show_stack) from [<81809e98>] (__dump_stack lib/dump_stack.c:79 [inline])
[<818027ac>] (show_stack) from [<81809e98>] (dump_stack+0xb8/0xe8 lib/dump_stack.c:120)
[<81809de0>] (dump_stack) from [<81803358>] (panic+0x130/0x378 kernel/panic.c:231)
 r7:81f48198 r6:82a390a4 r5:00000000 r4:82c6b0d0
[<81803228>] (panic) from [<802446f4>] (__warn+0xb0/0x164 kernel/panic.c:605)
 r3:82a2248c r2:00000000 r1:00000000 r0:81f48198
 r7:000001f9
[<80244644>] (__warn) from [<8180363c>] (warn_slowpath_fmt+0x9c/0xd4 kernel/panic.c:635)
 r7:80807690 r6:000001f9 r5:81fa0950 r4:81fa0910
[<818035a4>] (warn_slowpath_fmt) from [<80807690>] (debug_print_object+0xb0/0xc4 lib/debugobjects.c:505)
 r8:81a042a0 r7:81f6ee40 r6:86aeb5d0 r5:832feb1c r4:82a22bf0
[<808075e0>] (debug_print_object) from [<80808e48>] (__debug_check_no_obj_freed lib/debugobjects.c:987 [inline])
[<808075e0>] (debug_print_object) from [<80808e48>] (debug_check_no_obj_freed+0x1f8/0x244 lib/debugobjects.c:1018)
 r8:00000122 r7:00000000 r6:81a042a0 r5:86b4438c r4:86aeb5d0
[<80808c50>] (debug_check_no_obj_freed) from [<804af594>] (slab_free_hook mm/slub.c:1554 [inline])
[<80808c50>] (debug_check_no_obj_freed) from [<804af594>] (slab_free_freelist_hook+0xf4/0x188 mm/slub.c:1600)
 r10:60000013 r9:86b44000 r8:86d75d3c r7:86d75d38 r6:00000000 r5:86b44000
 r4:834016c0
[<804af4a0>] (slab_free_freelist_hook) from [<804b30cc>] (slab_free mm/slub.c:3161 [inline])
[<804af4a0>] (slab_free_freelist_hook) from [<804b30cc>] (kfree+0xf8/0x4f8 mm/slub.c:4213)
 r10:80661d80 r9:82bfd743 r8:8610bc00 r7:ffffff8b r6:86b44000 r5:834016c0
 r4:de13ac00
[<804b2fd4>] (kfree) from [<80661d80>] (ext4_fill_super+0x464/0x40d8 fs/ext4/super.c:5182)
 r10:86b44288 r9:82bfd743 r8:8610bc00 r7:ffffff8b r6:86b44000 r5:864b4800
 r4:00000000
[<8066191c>] (ext4_fill_super) from [<804de950>] (mount_bdev+0x17c/0x1a8 fs/super.c:1367)
 r10:86be6fc0 r9:8384f670 r8:00000083 r7:86b45000 r6:00000000 r5:864b4800
 r4:8384f2c0
[<804de7d4>] (mount_bdev) from [<80652198>] (ext4_mount+0x20/0x28 fs/ext4/super.c:6600)
 r9:86be6180 r8:86e39900 r7:86b45000 r6:86d75f6c r5:80652178 r4:86e39900
[<80652178>] (ext4_mount) from [<80529774>] (legacy_get_tree+0x2c/0x50 fs/fs_context.c:592)
[<80529748>] (legacy_get_tree) from [<804dcda0>] (vfs_get_tree+0x2c/0x108 fs/super.c:1497)
 r5:86e39900 r4:00000000
[<804dcd74>] (vfs_get_tree) from [<8050b78c>] (do_new_mount fs/namespace.c:2903 [inline])
[<804dcd74>] (vfs_get_tree) from [<8050b78c>] (path_mount+0x3e0/0xb9c fs/namespace.c:3233)
 r6:86d75f6c r5:00000020 r4:00000000
[<8050b3ac>] (path_mount) from [<8050c510>] (do_mount fs/namespace.c:3246 [inline])
[<8050b3ac>] (path_mount) from [<8050c510>] (__do_sys_mount fs/namespace.c:3454 [inline])
[<8050b3ac>] (path_mount) from [<8050c510>] (sys_mount+0x13c/0x274 fs/namespace.c:3431)
 r10:86b45000 r9:76f38f20 r8:76f38ee0 r7:86be6fc0 r6:20000200 r5:00000000
 r4:00000000
[<8050c3d4>] (sys_mount) from [<80200060>] (ret_fast_syscall+0x0/0x2c arch/arm/mm/proc-v7.S:64)
Exception stack(0x86d75fa8 to 0x86d75ff0)
5fa0:                   76f38f20 20000000 76f38ee0 20000100 20000000 00000000
5fc0: 76f38f20 20000000 20000200 00000015 76f38ee0 00000000 76f38ee0 00000000
5fe0: 00085c44 76f38e98 000164b4 0004cad0
 r10:00000015 r9:86d74000 r8:80200224 r7:00000015 r6:20000200 r5:20000000
 r4:76f38f20
Rebooting in 86400 seconds..