loop0: detected capacity change from 0 to 4096 ------------[ cut here ]------------ kernel BUG at fs/buffer.c:1579! Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI CPU: 0 UID: 0 PID: 5316 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 RIP: 0010:folio_set_bh+0x1dc/0x1e0 fs/buffer.c:1579 Code: 4c 89 e2 e8 66 d3 94 02 e9 42 ff ff ff e8 8c 3c 6e ff 48 89 df 48 c7 c6 20 de de 8b e8 2d ba d0 fe 90 0f 0b e8 75 3c 6e ff 90 <0f> 0b 66 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f RSP: 0018:ffffc9000f4b79a0 EFLAGS: 00010293 RAX: ffffffff82575edb RBX: ffffea0000d3f940 RCX: ffff888040824900 RDX: 0000000000000000 RSI: 0000000000001000 RDI: 0000000000001000 RBP: dffffc0000000000 R08: ffffea0000d3f947 R09: 1ffffd40001a7f28 R10: dffffc0000000000 R11: fffff940001a7f29 R12: 0000000000000000 R13: 0000000000001000 R14: ffff888047def2b8 R15: 0000000000001000 FS: 00007fdbafef76c0(0000) GS:ffff88808ca59000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000200000000100 CR3: 00000000444fd000 CR4: 0000000000352ef0 Call Trace: folio_alloc_buffers+0x39f/0x640 fs/buffer.c:943 grow_dev_folio fs/buffer.c:1072 [inline] grow_buffers fs/buffer.c:1113 [inline] __getblk_slow fs/buffer.c:1131 [inline] bdev_getblk+0x2cb/0x6e0 fs/buffer.c:1458 __bread_gfp+0x89/0x3b0 fs/buffer.c:1512 sb_bread include/linux/buffer_head.h:346 [inline] omfs_fill_super+0x30d/0x1560 fs/omfs/inode.c:483 get_tree_bdev_flags+0x431/0x4f0 fs/super.c:1694 vfs_get_tree+0x92/0x2a0 fs/super.c:1754 fc_mount fs/namespace.c:1193 [inline] do_new_mount_fc fs/namespace.c:3763 [inline] do_new_mount+0x341/0xd30 fs/namespace.c:3839 do_mount fs/namespace.c:4172 [inline] __do_sys_mount fs/namespace.c:4361 [inline] __se_sys_mount+0x31d/0x420 fs/namespace.c:4338 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fdbaef9c799 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fdbafef7028 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007fdbaf215fa0 RCX: 00007fdbaef9c799 RDX: 0000200000000000 RSI: 0000200000000180 RDI: 0000200000000100 RBP: 00007fdbaf032bd9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fdbaf216038 R14: 00007fdbaf215fa0 R15: 00007fff98f880e8 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:folio_set_bh+0x1dc/0x1e0 fs/buffer.c:1579 Code: 4c 89 e2 e8 66 d3 94 02 e9 42 ff ff ff e8 8c 3c 6e ff 48 89 df 48 c7 c6 20 de de 8b e8 2d ba d0 fe 90 0f 0b e8 75 3c 6e ff 90 <0f> 0b 66 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f RSP: 0018:ffffc9000f4b79a0 EFLAGS: 00010293 RAX: ffffffff82575edb RBX: ffffea0000d3f940 RCX: ffff888040824900 RDX: 0000000000000000 RSI: 0000000000001000 RDI: 0000000000001000 RBP: dffffc0000000000 R08: ffffea0000d3f947 R09: 1ffffd40001a7f28 R10: dffffc0000000000 R11: fffff940001a7f29 R12: 0000000000000000 R13: 0000000000001000 R14: ffff888047def2b8 R15: 0000000000001000 FS: 00007fdbafef76c0(0000) GS:ffff88808ca59000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055e9d5ae0168 CR3: 00000000444fd000 CR4: 0000000000352ef0