EXT4-fs (loop6): VFS: Can't find ext4 filesystem
------------[ cut here ]------------
WARNING: CPU: 1 PID: 5090 at kernel/events/core.c:1978 perf_group_attach+0x396/0x450 kernel/events/core.c:1978
Modules linked in:
CPU: 1 PID: 5090 Comm: syz-executor.5 Not tainted 5.10.79 #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014
RIP: 0010:perf_group_attach+0x396/0x450 kernel/events/core.c:1978
Code: 48 c1 e8 03 42 80 3c 20 00 75 5f 48 8b 5b 10 48 83 eb 10 48 39 dd 75 d4 5b 5d 41 5c 41 5d 41 5e e9 9f ef f2 ff e8 9a ef f2 ff <0f> 0b e9 b1 fd ff ff 48 c7 c7 3c 2d 47 85 e8 17 33 1e 00 e9 b9 fc
RSP: 0000:ffff888045997e38 EFLAGS: 00010046
RAX: 0000000080010002 RBX: ffff888043c9a000 RCX: ffffffff814ca29f
RDX: ffff888042c34bc0 RSI: ffffffff814ca566 RDI: ffff888043c9a220
RBP: ffff888043c88000 R08: 0000000000000001 R09: 0000000000000003
R10: 0000000000000000 R11: 0000000000000001 R12: ffff888043556800
R13: 0000000000000000 R14: 0000000000000000 R15: ffff88806cf37748
FS:  000055555656d400(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f461fa35718 CR3: 0000000045fb4000 CR4: 0000000000350ee0
Call Trace:
 add_event_to_ctx kernel/events/core.c:2673 [inline]
 __perf_install_in_context+0x246/0x2d0 kernel/events/core.c:2824
 remote_function kernel/events/core.c:88 [inline]
 remote_function+0x11d/0x1a0 kernel/events/core.c:68
 flush_smp_call_function_queue+0x1b4/0x5d0 kernel/smp.c:395
 __sysvec_call_function_single+0x92/0x370 arch/x86/kernel/smp.c:248
 run_sysvec_on_irqstack_cond arch/x86/include/asm/irq_stack.h:91 [inline]
 sysvec_call_function_single+0x3e/0xa0 arch/x86/kernel/smp.c:243
 asm_sysvec_call_function_single+0x12/0x20 arch/x86/include/asm/idtentry.h:643
RIP: 0033:0x7f462248ca3c
Code: 00 48 01 d8 49 f7 f5 48 69 d2 40 42 0f 00 48 89 84 24 d0 00 00 00 31 c0 48 89 94 24 d8 00 00 00 ba 80 00 00 00 e8 c4 40 05 00 <8b> 45 00 85 c0 0f 84 6b ff ff ff 48 8b ac 24 98 00 00 00 48 89 ef
RSP: 002b:00007fffd0e6ba50 EFLAGS: 00000217
RAX: 0000000000000000 RBX: 0000000000000032 RCX: 00007f46224e0b19
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f46225f402c
RBP: 00007f46225f402c R08: 00007fffd0eec090 R09: 0000000000000000
R10: 00007fffd0e6bb20 R11: 0000000000000246 R12: 0000000000059879
R13: 00000000000003e8 R14: 00007f46225f3f60 R15: 0000000000059849
irq event stamp: 2376
hardirqs last  enabled at (2375): [<ffffffff83e0007c>] entry_SYSCALL_64_after_hwframe+0x44/0xa9
hardirqs last disabled at (2376): [<ffffffff83dc6903>] irqentry_enter+0x43/0x50 kernel/entry/common.c:291
softirqs last  enabled at (2240): [<ffffffff81088b33>] memcpy include/linux/string.h:399 [inline]
softirqs last  enabled at (2240): [<ffffffff81088b33>] fpu__copy+0x173/0x550 arch/x86/kernel/fpu/core.c:241
softirqs last disabled at (2238): [<ffffffff81088a61>] fpu__copy+0xa1/0x550 arch/x86/kernel/fpu/core.c:229
---[ end trace d5210c22558a1501 ]---

======================================================