------------[ cut here ]------------ kernel BUG at fs/fat/inode.c:161! invalid opcode: 0000 [#1] PREEMPT SMP KASAN Modules linked in: CPU: 0 PID: 9657 Comm: syz-executor.4 Not tainted 4.14.302-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 task: ffff8880415f8580 task.stack: ffff888041600000 RIP: 0010:__fat_get_block fs/fat/inode.c:161 [inline] RIP: 0010:fat_get_block+0x647/0x750 fs/fat/inode.c:176 RSP: 0018:ffff8880416076d8 EFLAGS: 00010212 RAX: 0000000000040000 RBX: ffff88804773bbd0 RCX: ffffc90007adf000 RDX: 00000000000005af RSI: ffffffff81d001f7 RDI: ffff88804773dae8 RBP: ffff88804773dba0 R08: ffff888041607770 R09: 0000000000000000 R10: 0000000000000000 R11: ffff8880415f8580 R12: ffff8880416e65c0 R13: 0000000000000000 R14: 000000000000000b R15: 0000000000000001 FS: 00007fbdf208d700(0000) GS:ffff8880ba400000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2e825000 CR3: 00000000a71d4000 CR4: 00000000003406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __block_write_begin_int+0x35c/0x11d0 fs/buffer.c:2038 __block_write_begin fs/buffer.c:2088 [inline] block_write_begin+0x58/0x270 fs/buffer.c:2147 cont_write_begin+0x4a3/0x740 fs/buffer.c:2497 fat_write_begin+0x89/0x170 fs/fat/inode.c:222 cont_expand_zero fs/buffer.c:2457 [inline] cont_write_begin+0x54b/0x740 fs/buffer.c:2487 fat_write_begin+0x89/0x170 fs/fat/inode.c:222 generic_cont_expand_simple+0xe1/0x130 fs/buffer.c:2388 fat_cont_expand+0x71/0x280 fs/fat/file.c:198 fat_setattr+0x8b8/0xbe0 fs/fat/file.c:477 notify_change+0x56b/0xd10 fs/attr.c:315 do_truncate+0xff/0x1a0 fs/open.c:63 vfs_truncate+0x456/0x680 fs/open.c:120 do_sys_truncate.part.0+0xdc/0xf0 fs/open.c:143 do_sys_truncate fs/open.c:137 [inline] SYSC_truncate fs/open.c:155 [inline] SyS_truncate+0x23/0x40 fs/open.c:153 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x5e/0xd3 RIP: 0033:0x7fbdf3b1b0a9 RSP: 002b:00007fbdf208d168 EFLAGS: 00000246 ORIG_RAX: 000000000000004c RAX: ffffffffffffffda RBX: 00007fbdf3c3af80 RCX: 00007fbdf3b1b0a9 RDX: 0000000000000000 RSI: 0000000000000007 RDI: 00000000200004c0 RBP: 00007fbdf3b76ae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffeabf62bdf R14: 00007fbdf208d300 R15: 0000000000022000 Code: 19 af ff e9 bd fa ff ff 48 8b 7c 24 20 e8 82 18 af ff e9 f4 fb ff ff 48 8b 7c 24 38 e8 83 17 af ff e9 52 fe ff ff e8 49 58 85 ff <0f> 0b e8 42 58 85 ff 0f 0b e8 3b 19 af ff e9 b1 fa ff ff 48 8b RIP: __fat_get_block fs/fat/inode.c:161 [inline] RSP: ffff8880416076d8 RIP: fat_get_block+0x647/0x750 fs/fat/inode.c:176 RSP: ffff8880416076d8 ---[ end trace 5183f8c67495fe2e ]---