EXT4-fs error (device loop4): ext4_fill_super:4967: inode #2: comm syz-executor.4: iget: special inode unallocated
EXT4-fs (loop4): get root inode failed
EXT4-fs (loop4): mount failed
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WARNING: CPU: 1 PID: 20808 at kernel/cgroup/cgroup.c:1395 cset_cgroup_from_root+0x1a8/0x2a0 kernel/cgroup/cgroup.c:1395
Modules linked in:
CPU: 1 PID: 20808 Comm: syz-executor.2 Not tainted 5.10.226 #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
RIP: 0010:cset_cgroup_from_root+0x1a8/0x2a0 kernel/cgroup/cgroup.c:1395
Code: 50 08 00 be ff ff ff ff 48 c7 c7 08 3a 02 85 e8 6e 9e ad 02 31 ff 41 89 c4 89 c6 e8 d2 49 08 00 45 85 e4 75 07 e8 78 50 08 00 <0f> 0b e8 71 50 08 00 48 89 ea 83 e5 07 48 b8 00 00 00 00 00 fc ff
RSP: 0018:ffff8880525cf9b8 EFLAGS: 00010012
RAX: 0000000000000b58 RBX: ffff888008fd0000 RCX: ffffc90003c05000
RDX: 0000000000040000 RSI: ffffffff81384ec8 RDI: 0000000000000005
RBP: ffffffff85676efc R08: 0000000000000000 R09: 0000000000000003
R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000
R13: ffff888016ed4000 R14: ffff88804840ac00 R15: 0000000000000000
FS:  00007fd14db1a700(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2d426000 CR3: 000000005068a000 CR4: 0000000000350ee0
Call Trace:
 cgroup_path_ns_locked+0x6c/0x110 kernel/cgroup/cgroup.c:2261
 proc_cpuset_show+0x19a/0x510 kernel/cgroup/cpuset.c:3732
 proc_single_show+0x121/0x1f0 fs/proc/base.c:775
 seq_read_iter+0x510/0x12b0 fs/seq_file.c:230
 seq_read+0x3dd/0x5b0 fs/seq_file.c:162
 do_loop_readv_writev fs/read_write.c:761 [inline]
 do_loop_readv_writev fs/read_write.c:748 [inline]
 do_iter_read+0x4fa/0x760 fs/read_write.c:803
 vfs_readv+0xe5/0x160 fs/read_write.c:921
 do_readv+0x139/0x300 fs/read_write.c:958
 do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x67/0xd1
RIP: 0033:0x7fd1505a4b19
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 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fd14db1a188 EFLAGS: 00000246 ORIG_RAX: 0000000000000013
RAX: ffffffffffffffda RBX: 00007fd1506b7f60 RCX: 00007fd1505a4b19
RDX: 0000000000000001 RSI: 0000000020000100 RDI: 0000000000000003
RBP: 00007fd1505fef6d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffc8142550f R14: 00007fd14db1a300 R15: 0000000000022000
irq event stamp: 2274
hardirqs last  enabled at (2273): [<ffffffff83e79118>] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline]
hardirqs last  enabled at (2273): [<ffffffff83e79118>] _raw_spin_unlock_irqrestore+0x38/0x40 kernel/locking/spinlock.c:191
hardirqs last disabled at (2274): [<ffffffff83e78ece>] __raw_spin_lock_irq include/linux/spinlock_api_smp.h:126 [inline]
hardirqs last disabled at (2274): [<ffffffff83e78ece>] _raw_spin_lock_irq+0x3e/0x40 kernel/locking/spinlock.c:167
softirqs last  enabled at (2082): [<ffffffff84001092>] asm_call_irq_on_stack+0x12/0x20
softirqs last disabled at (2073): [<ffffffff84001092>] asm_call_irq_on_stack+0x12/0x20
---[ end trace 30b001dc59c7399c ]---
hugetlbfs: Unknown parameter 'ext4'
EXT4-fs error (device loop4): ext4_fill_super:4967: inode #2: comm syz-executor.4: iget: special inode unallocated
EXT4-fs (loop4): get root inode failed
EXT4-fs (loop4): mount failed