------------[ cut here ]------------ kernel BUG at fs/buffer.c:553! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 25849 Comm: syz-executor.0 Not tainted 4.19.126-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:mark_buffer_dirty_inode+0x2f8/0x3c0 fs/buffer.c:553 Code: 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 75 4d 48 89 6b 58 4c 89 ef e8 32 82 69 05 e9 00 fe ff ff e8 78 24 b3 ff <0f> 0b 4c 89 ff e8 0e b1 e8 ff e9 e5 fd ff ff e8 04 b1 e8 ff e9 6e RSP: 0018:ffff8880505e7ae8 EFLAGS: 00010246 RAX: 0000000000040000 RBX: ffff888053d5d5e8 RCX: ffffc90005ad4000 RDX: 0000000000040000 RSI: ffffffff81b46658 RDI: ffff888053e2def8 RBP: ffff888053e2dd98 R08: 0000000000000000 R09: 0000000000000003 R10: ffffed1015ce473a R11: ffff8880ae7239d3 R12: ffff8880a6b024e0 R13: 0000000000000000 R14: ffff8880505e7c48 R15: ffff88804f4e0a80 FS: 00007f99f0fdc700(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000514d80 CR3: 00000000a8057000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: fat_alloc_clusters+0x5d6/0xed0 fs/fat/fatent.c:503 fat_add_cluster+0x6d/0xf0 fs/fat/inode.c:101 fat_fallocate+0x26d/0x310 fs/fat/file.c:300 vfs_fallocate+0x484/0x990 fs/open.c:308 ksys_fallocate+0x51/0x90 fs/open.c:331 __do_sys_fallocate fs/open.c:339 [inline] __se_sys_fallocate fs/open.c:337 [inline] __x64_sys_fallocate+0x93/0xf0 fs/open.c:337 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45ca69 Code: 0d b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 0f 83 db b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f99f0fdbc78 EFLAGS: 00000246 ORIG_RAX: 000000000000011d RAX: ffffffffffffffda RBX: 00000000004dba00 RCX: 000000000045ca69 RDX: 0000000000000000 RSI: 0000000100000001 RDI: 0000000000000004 RBP: 000000000078bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 000000002811ffff R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000000000ae R14: 00000000004c3620 R15: 00007f99f0fdc6d4 Modules linked in: ---[ end trace 1bb066e8dd52abde ]--- RIP: 0010:mark_buffer_dirty_inode+0x2f8/0x3c0 fs/buffer.c:553 Code: 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 75 4d 48 89 6b 58 4c 89 ef e8 32 82 69 05 e9 00 fe ff ff e8 78 24 b3 ff <0f> 0b 4c 89 ff e8 0e b1 e8 ff e9 e5 fd ff ff e8 04 b1 e8 ff e9 6e RSP: 0018:ffff8880505e7ae8 EFLAGS: 00010246 RAX: 0000000000040000 RBX: ffff888053d5d5e8 RCX: ffffc90005ad4000 RDX: 0000000000040000 RSI: ffffffff81b46658 RDI: ffff888053e2def8 RBP: ffff888053e2dd98 R08: 0000000000000000 R09: 0000000000000003 R10: ffffed1015ce473a R11: ffff8880ae7239d3 R12: ffff8880a6b024e0 R13: 0000000000000000 R14: ffff8880505e7c48 R15: ffff88804f4e0a80 FS: 00007f99f0fdc700(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffdd47d7fc8 CR3: 00000000a8057000 CR4: 00000000001406e0 FAT-fs (loop3): error, fat_free_clusters: deleting FAT entry beyond EOF DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 FAT-fs (loop2): error, fat_free_clusters: deleting FAT entry beyond EOF FAT-fs (loop3): Filesystem has been set read-only FAT-fs (loop5): error, fat_free_clusters: deleting FAT entry beyond EOF DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 FAT-fs (loop5): Filesystem has been set read-only FAT-fs (loop2): Filesystem has been set read-only