------------[ cut here ]------------ kernel BUG at fs/ext4/inode.c:1721! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 10406 Comm: syz-executor.1 Not tainted 5.15.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:ext4_da_map_blocks fs/ext4/inode.c:1721 [inline] RIP: 0010:ext4_da_get_block_prep+0xdf8/0x1070 fs/ext4/inode.c:1830 Code: e8 dd 2e ad ff e9 d9 f3 ff ff e8 33 c1 66 ff be 08 00 00 00 48 89 df e8 46 32 ad ff f0 80 0b 20 e9 99 fd ff ff e8 18 c1 66 ff <0f> 0b e8 11 c1 66 ff 0f 0b e8 0a c1 66 ff 0f 0b e8 03 c1 66 ff 48 RSP: 0018:ffffc90004d5f740 EFLAGS: 00010212 RAX: 00000000000040ae RBX: ffff88802c9709f8 RCX: ffffc9000b5e4000 RDX: 0000000000040000 RSI: ffffffff8210b178 RDI: 0000000000000003 RBP: ffffffffffffffff R08: ffffffffffffffff R09: 0000000000000000 R10: ffffffff8210ae1c R11: 0000000000000000 R12: 0000000000000000 R13: 1ffff920009abeec R14: ffffffffffff0000 R15: 0000000000000004 FS: 00007f8b01bf9700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000200000c0 CR3: 0000000077d76000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __block_write_begin_int+0x43e/0x1830 fs/buffer.c:2010 __block_write_begin fs/buffer.c:2060 [inline] block_page_mkwrite+0x228/0x320 fs/buffer.c:2523 ext4_page_mkwrite+0xc4a/0x1a60 fs/ext4/inode.c:6047 do_page_mkwrite+0x1a7/0x550 mm/memory.c:2870 do_shared_fault mm/memory.c:4248 [inline] do_fault mm/memory.c:4316 [inline] handle_pte_fault mm/memory.c:4570 [inline] __handle_mm_fault+0x25f7/0x5280 mm/memory.c:4705 handle_mm_fault+0x1c8/0x790 mm/memory.c:4803 do_user_addr_fault+0x489/0x11c0 arch/x86/mm/fault.c:1397 handle_page_fault arch/x86/mm/fault.c:1485 [inline] exc_page_fault+0x9e/0x180 arch/x86/mm/fault.c:1541 asm_exc_page_fault+0x1e/0x30 arch/x86/include/asm/idtentry.h:568 RIP: 0010:__put_user_nocheck_4+0x3/0x11 Code: 00 00 48 39 d9 73 54 0f 01 cb 66 89 01 31 c9 0f 01 ca c3 0f 1f 44 00 00 48 bb fd ef ff ff ff 7f 00 00 48 39 d9 73 34 0f 01 cb <89> 01 31 c9 0f 01 ca c3 66 0f 1f 44 00 00 48 bb f9 ef ff ff ff 7f RSP: 0018:ffffc90004d5fe40 EFLAGS: 00050297 RAX: 0000000000000005 RBX: 00007fffffffeffd RCX: 00000000200000c0 RDX: 0000000000040000 RSI: ffffffff8715be9b RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000005 R13: 0000000000000006 R14: 0000000000000000 R15: dffffc0000000000 __sys_socketpair+0x107/0x570 net/socket.c:1602 __do_sys_socketpair net/socket.c:1668 [inline] __se_sys_socketpair net/socket.c:1665 [inline] __x64_sys_socketpair+0x93/0xf0 net/socket.c:1665 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f8b04683ae9 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 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f8b01bf9188 EFLAGS: 00000246 ORIG_RAX: 0000000000000035 RAX: ffffffffffffffda RBX: 00007f8b04796f60 RCX: 00007f8b04683ae9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000000000000001e RBP: 00007f8b046ddf25 R08: 0000000000000000 R09: 0000000000000000 R10: 00000000200000c0 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffdda4e428f R14: 00007f8b01bf9300 R15: 0000000000022000 Modules linked in: ---[ end trace e6eaf457d5ab07ac ]--- RIP: 0010:ext4_da_map_blocks fs/ext4/inode.c:1721 [inline] RIP: 0010:ext4_da_get_block_prep+0xdf8/0x1070 fs/ext4/inode.c:1830 Code: e8 dd 2e ad ff e9 d9 f3 ff ff e8 33 c1 66 ff be 08 00 00 00 48 89 df e8 46 32 ad ff f0 80 0b 20 e9 99 fd ff ff e8 18 c1 66 ff <0f> 0b e8 11 c1 66 ff 0f 0b e8 0a c1 66 ff 0f 0b e8 03 c1 66 ff 48 RSP: 0018:ffffc90004d5f740 EFLAGS: 00010212 RAX: 00000000000040ae RBX: ffff88802c9709f8 RCX: ffffc9000b5e4000 RDX: 0000000000040000 RSI: ffffffff8210b178 RDI: 0000000000000003 RBP: ffffffffffffffff R08: ffffffffffffffff R09: 0000000000000000 R10: ffffffff8210ae1c R11: 0000000000000000 R12: 0000000000000000 R13: 1ffff920009abeec R14: ffffffffffff0000 R15: 0000000000000004 FS: 00007f8b01bf9700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000200000c0 CR3: 0000000077d76000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 00 00 add %al,(%rax) 2: 48 39 d9 cmp %rbx,%rcx 5: 73 54 jae 0x5b 7: 0f 01 cb stac a: 66 89 01 mov %ax,(%rcx) d: 31 c9 xor %ecx,%ecx f: 0f 01 ca clac 12: c3 retq 13: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1) 18: 48 bb fd ef ff ff ff movabs $0x7fffffffeffd,%rbx 1f: 7f 00 00 22: 48 39 d9 cmp %rbx,%rcx 25: 73 34 jae 0x5b 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 0f 1f 44 00 00 nopw 0x0(%rax,%rax,1) 38: 48 rex.W 39: bb f9 ef ff ff mov $0xffffeff9,%ebx 3e: ff (bad) 3f: 7f .byte 0x7f