syzbot

syz-executor106[5027]: memfd_create() called without MFD_EXEC or MFD_NOEXEC_SEAL set
loop0: detected capacity change from 0 to 128
oldfs: cannot read superblock
------------[ cut here ]------------
VFS: brelse: Trying to free free buffer
WARNING: CPU: 1 PID: 5027 at fs/buffer.c:1247 __brelse fs/buffer.c:1247 [inline]
WARNING: CPU: 1 PID: 5027 at fs/buffer.c:1247 brelse include/linux/buffer_head.h:314 [inline]
WARNING: CPU: 1 PID: 5027 at fs/buffer.c:1247 __invalidate_bh_lrus fs/buffer.c:1486 [inline]
WARNING: CPU: 1 PID: 5027 at fs/buffer.c:1247 invalidate_bh_lru+0xfc/0x1b0 fs/buffer.c:1499
Modules linked in:
CPU: 1 PID: 5027 Comm: syz-executor106 Not tainted 6.6.0-rc5-syzkaller-00267-g9a3dad63edbe #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023
RIP: 0010:__brelse fs/buffer.c:1247 [inline]
RIP: 0010:brelse include/linux/buffer_head.h:314 [inline]
RIP: 0010:__invalidate_bh_lrus fs/buffer.c:1486 [inline]
RIP: 0010:invalidate_bh_lru+0xfc/0x1b0 fs/buffer.c:1499
Code: 00 e8 d8 3e df ff f0 ff 0b eb 21 e8 ae bd 84 ff 41 80 3c 2e 00 75 26 eb 2c e8 a0 bd 84 ff 48 c7 c7 c0 20 18 8b e8 54 e0 4a ff <0f> 0b 48 bd 00 00 00 00 00 fc ff df 41 80 3c 2e 00 74 08 4c 89 ff
RSP: 0018:ffffc90003d0f0a8 EFLAGS: 00010046
RAX: dc65b73cccd3ad00 RBX: ffff8880759b87a0 RCX: ffff8880208a0000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffffffff81543302 R09: 1ffff1101732516a
R10: dffffc0000000000 R11: ffffed101732516b R12: ffff8880b9937f38
R13: 0000000000000000 R14: 1ffff11017326fe7 R15: ffff8880b9937f38
FS:  000055555718f380(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000000066c7e0 CR3: 000000002741c000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 csd_do_func kernel/smp.c:133 [inline]
 smp_call_function_many_cond+0x1581/0x2890 kernel/smp.c:835
 on_each_cpu_cond_mask+0x3f/0x80 kernel/smp.c:1012
 invalidate_bdev+0x8e/0xc0 block/bdev.c:85
 invalidate_disk+0x45/0xe0 block/genhd.c:737
 __loop_clr_fd+0x251/0x690 drivers/block/loop.c:1164
 loop_clr_fd drivers/block/loop.c:1257 [inline]
 lo_ioctl+0x16d3/0x2080 drivers/block/loop.c:1563
 blkdev_ioctl+0x5cf/0x730 block/ioctl.c:630
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:871 [inline]
 __se_sys_ioctl+0xf8/0x170 fs/ioctl.c:857
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f5ff24474bb
Code: 00 48 89 44 24 18 31 c0 48 8d 44 24 60 c7 04 24 10 00 00 00 48 89 44 24 08 48 8d 44 24 20 48 89 44 24 10 b8 10 00 00 00 0f 05 <89> c2 3d 00 f0 ff ff 77 1c 48 8b 44 24 18 64 48 2b 04 25 28 00 00
RSP: 002b:00007ffd1882b0a0 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000000016 RCX: 00007f5ff24474bb
RDX: 0000000000000000 RSI: 0000000000004c01 RDI: 0000000000000004
RBP: 0000000000000004 R08: 00007ffd1882b150 R09: 0000000000009e47
R10: 0000000000000404 R11: 0000000000000246 R12: 0000000000000404
R13: 00007ffd1882b150 R14: 0000000000000003 R15: 0000000000010000
 </TASK>