------------[ cut here ]------------ WARNING: CPU: 0 PID: 12734 at fs/udf/inode.c:2050 __udf_add_aext+0x550/0x6f0 Modules linked in: CPU: 0 PID: 12734 Comm: syz-executor.1 Not tainted 6.3.0-rc4-syzkaller-00195-g5a57b48fdfcb #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023 RIP: 0010:__udf_add_aext+0x550/0x6f0 fs/udf/inode.c:2049 Code: 4c 89 e7 e8 92 67 e4 fe 49 8b 3c 24 4c 89 fe e8 96 f4 03 ff 31 c0 48 83 c4 30 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 c0 b0 8e fe <0f> 0b e9 ed fb ff ff e8 b4 b0 8e fe 0f 0b e9 5c fc ff ff e8 a8 b0 RSP: 0018:ffffc900033fead8 EFLAGS: 00010283 RAX: ffffffff82fba1c0 RBX: 1ffff9200067fda5 RCX: 0000000000040000 RDX: ffffc9000c620000 RSI: 0000000000017f14 RDI: 0000000000017f15 RBP: 0000000000000000 R08: ffffffff82fb9da6 R09: ffffffff82fb9cd6 R10: 0000000000000002 R11: ffff88802c008000 R12: ffffc900033fed20 R13: 0000000000000004 R14: dffffc0000000000 R15: ffffc900033fed28 FS: 00007fa3adcdd700(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000200c3038 CR3: 00000000737fc000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: udf_add_aext fs/udf/inode.c:2107 [inline] udf_insert_aext fs/udf/inode.c:2269 [inline] udf_update_extents fs/udf/inode.c:1189 [inline] inode_getblk fs/udf/inode.c:904 [inline] udf_map_block+0x3bce/0x4ff0 fs/udf/inode.c:450 __udf_get_block+0x126/0x410 fs/udf/inode.c:464 __block_write_begin_int+0x548/0x1a50 fs/buffer.c:2034 udf_page_mkwrite+0x5ae/0x960 fs/udf/file.c:69 do_page_mkwrite+0x1a1/0x600 mm/memory.c:2925 wp_page_shared mm/memory.c:3274 [inline] do_wp_page+0x501/0x3620 mm/memory.c:3356 handle_pte_fault mm/memory.c:4927 [inline] __handle_mm_fault mm/memory.c:5051 [inline] handle_mm_fault+0x23a0/0x51c0 mm/memory.c:5197 do_user_addr_fault arch/x86/mm/fault.c:1407 [inline] handle_page_fault arch/x86/mm/fault.c:1498 [inline] exc_page_fault+0x5b1/0x7c0 arch/x86/mm/fault.c:1554 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570 RIP: 0010:__put_user_nocheck_4+0xb/0x20 arch/x86/lib/putuser.S:105 Code: 0f 1e fa 48 bb fd ef ff ff ff 7f 00 00 48 39 d9 73 70 0f 01 cb 89 01 31 c9 0f 01 ca c3 66 90 f3 0f 1e fa f3 0f 1e fa 0f 01 cb <89> 01 31 c9 0f 01 ca c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 f3 RSP: 0018:ffffc900033ff918 EFLAGS: 00050246 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000020005030 RDX: ffff88802c008000 RSI: 0000000000000000 RDI: 00000000ffffffff RBP: ffffc900033ffa90 R08: ffffffff888a041b R09: fffff5200067fed5 R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000 R13: 0000000000000000 R14: 0000000020005000 R15: 0000000000000000 ____sys_recvmsg+0x371/0x570 net/socket.c:2733 ___sys_recvmsg net/socket.c:2762 [inline] do_recvmmsg+0x471/0xad0 net/socket.c:2856 __sys_recvmmsg net/socket.c:2935 [inline] __do_sys_recvmmsg net/socket.c:2958 [inline] __se_sys_recvmmsg net/socket.c:2951 [inline] __x64_sys_recvmmsg+0x199/0x240 net/socket.c:2951 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: 0033:0x7fa3b748c0f9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 00 00 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 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fa3adcdd168 EFLAGS: 00000246 ORIG_RAX: 000000000000012b RAX: ffffffffffffffda RBX: 00007fa3b75ac120 RCX: 00007fa3b748c0f9 RDX: 0000000000010106 RSI: 00000000200000c0 RDI: 0000000000000006 RBP: 00007fa3b74e7b39 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fff6c05571f R14: 00007fa3adcdd300 R15: 0000000000022000 ---------------- Code disassembly (best guess): 0: 0f 1e fa nop %edx 3: 48 bb fd ef ff ff ff movabs $0x7fffffffeffd,%rbx a: 7f 00 00 d: 48 39 d9 cmp %rbx,%rcx 10: 73 70 jae 0x82 12: 0f 01 cb stac 15: 89 01 mov %eax,(%rcx) 17: 31 c9 xor %ecx,%ecx 19: 0f 01 ca clac 1c: c3 retq 1d: 66 90 xchg %ax,%ax 1f: f3 0f 1e fa endbr64 23: f3 0f 1e fa endbr64 27: 0f 01 cb stac * 2a: 89 01 mov %eax,(%rcx) <-- trapping instruction 2c: 31 c9 xor %ecx,%ecx 2e: 0f 01 ca clac 31: c3 retq 32: 66 2e 0f 1f 84 00 00 nopw %cs:0x0(%rax,%rax,1) 39: 00 00 00 3c: 0f 1f 00 nopl (%rax) 3f: f3 repz