------------[ cut here ]------------ WARNING: CPU: 1 PID: 8225 at fs/udf/inode.c:2080 __udf_add_aext+0x6b3/0x820 fs/udf/inode.c:2080 Modules linked in: CPU: 1 UID: 0 PID: 8225 Comm: syz.5.625 Not tainted 6.14.0-syzkaller-12508-g92b71befc349 #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 RIP: 0010:__udf_add_aext+0x6b3/0x820 fs/udf/inode.c:2080 Code: 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 70 01 00 00 49 8b 7c 24 28 be 18 00 00 00 e8 b8 be 02 00 e9 f0 fd ff ff e8 4e b5 81 fe 90 <0f> 0b 90 e9 fb fa ff ff e8 40 b5 81 fe 90 0f 0b 90 e9 5c fb ff ff RSP: 0018:ffffc90015636cd0 EFLAGS: 00010246 RAX: 0000000000080000 RBX: ffffc90015637088 RCX: ffffc9000e5da000 RDX: 0000000000080000 RSI: ffffffff83398a62 RDI: 0000000000000006 RBP: ffff888056550e18 R08: 0000000000000006 R09: 0000000000000004 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000001 R13: 0000000000000010 R14: 0000000000000018 R15: ffffc90015637090 FS: 00007fede63e46c0(0000) GS:ffff888124abf000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f35f4c4aea2 CR3: 000000004bc7a000 CR4: 0000000000350ef0 Call Trace: udf_add_aext+0x23a/0x2e0 fs/udf/inode.c:2138 udf_insert_aext fs/udf/inode.c:2317 [inline] udf_update_extents fs/udf/inode.c:1205 [inline] inode_getblk+0x2a6e/0x4100 fs/udf/inode.c:919 udf_map_block+0x2dd/0x5b0 fs/udf/inode.c:447 __udf_get_block+0x98/0x330 fs/udf/inode.c:461 __block_write_begin_int+0x4f4/0x16d0 fs/buffer.c:2116 udf_page_mkwrite+0x479/0xa00 fs/udf/file.c:65 do_page_mkwrite+0x174/0x380 mm/memory.c:3287 wp_page_shared mm/memory.c:3688 [inline] do_wp_page+0xb9e/0x59f0 mm/memory.c:3907 handle_pte_fault mm/memory.c:6013 [inline] __handle_mm_fault+0x1ada/0x2a40 mm/memory.c:6140 handle_mm_fault+0x3fe/0xad0 mm/memory.c:6309 do_user_addr_fault+0x7a6/0x1370 arch/x86/mm/fault.c:1388 handle_page_fault arch/x86/mm/fault.c:1480 [inline] exc_page_fault+0x5c/0xc0 arch/x86/mm/fault.c:1538 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623 RIP: 0010:__put_user_nocheck_4+0x3/0x10 arch/x86/lib/putuser.S:104 Code: d9 0f 01 cb 89 01 31 c9 0f 01 ca e9 72 7c a1 f5 0f 1f 80 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 01 cb <89> 01 31 c9 0f 01 ca e9 4c 7c a1 f5 90 90 90 90 90 90 90 90 90 90 RSP: 0018:ffffc900156379f8 EFLAGS: 00050246 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000200000128030 RDX: 0000000000080000 RSI: ffffffff893c1363 RDI: 0000000000000005 RBP: ffffc90015637d98 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000002 R11: 0000000000000000 R12: 0000000000000000 R13: 0000200000128000 R14: ffffc90015637ddc R15: 0000000000000002 ____sys_recvmsg+0x2ee/0x6b0 net/socket.c:2799 ___sys_recvmsg+0x114/0x1a0 net/socket.c:2828 do_recvmmsg+0x2fe/0x740 net/socket.c:2923 __sys_recvmmsg net/socket.c:2997 [inline] __do_sys_recvmmsg net/socket.c:3020 [inline] __se_sys_recvmmsg net/socket.c:3013 [inline] __x64_sys_recvmmsg+0x22a/0x280 net/socket.c:3013 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0x260 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fede558d169 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fede63e4038 EFLAGS: 00000246 ORIG_RAX: 000000000000012b RAX: ffffffffffffffda RBX: 00007fede57a6080 RCX: 00007fede558d169 RDX: 0000000000010106 RSI: 00002000000000c0 RDI: 0000000000000005 RBP: 00007fede560e2a0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000002 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fede57a6080 R15: 00007fff3b2acd68 ---------------- Code disassembly (best guess): 0: d9 0f (bad) (%rdi) 2: 01 cb add %ecx,%ebx 4: 89 01 mov %eax,(%rcx) 6: 31 c9 xor %ecx,%ecx 8: 0f 01 ca clac b: e9 72 7c a1 f5 jmp 0xf5a17c82 10: 0f 1f 80 00 00 00 00 nopl 0x0(%rax) 17: 90 nop 18: 90 nop 19: 90 nop 1a: 90 nop 1b: 90 nop 1c: 90 nop 1d: 90 nop 1e: 90 nop 1f: 90 nop 20: 90 nop 21: 90 nop 22: 90 nop 23: 90 nop 24: 90 nop 25: 90 nop 26: 90 nop 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: e9 4c 7c a1 f5 jmp 0xf5a17c82 36: 90 nop 37: 90 nop 38: 90 nop 39: 90 nop 3a: 90 nop 3b: 90 nop 3c: 90 nop 3d: 90 nop 3e: 90 nop 3f: 90 nop