kernel BUG at fs/ext4/ext4.h:3331! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 23397 Comm: syz-executor.4 Not tainted 6.1.25-syzkaller-00041-g3a8999c6830e #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2023 RIP: 0010:ext4_get_group_info fs/ext4/ext4.h:3331 [inline] RIP: 0010:ext4_mb_find_by_goal+0xdf4/0xe30 fs/ext4/mballoc.c:2162 Code: c4 ff e9 b5 fb ff ff e8 ba 55 7e ff 49 bc 00 00 00 00 00 fc ff df e9 6f f7 ff ff e8 a6 55 7e ff e9 51 f7 ff ff e8 9c 55 7e ff <0f> 0b e8 a5 3f f8 02 e8 90 55 7e ff 0f 0b e8 89 55 7e ff 0f 0b e8 RSP: 0018:ffffc900034beb00 EFLAGS: 00010246 RAX: ffffffff81f68f74 RBX: 0000000000000001 RCX: 0000000000040000 RDX: ffffc90006aad000 RSI: 000000000003ffff RDI: 0000000000040000 RBP: ffffc900034bec10 R08: ffffffff81f682ab R09: ffffed102c069c32 R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff11023fcd879 R13: 0000000000000001 R14: 1ffff92000697d70 R15: ffff88811fe6c3c8 FS: 00007f781f7366c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2e82d000 CR3: 0000000119d79000 CR4: 00000000003506a0 DR0: 00000000ffff070c DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 Call Trace: ext4_mb_regular_allocator+0x24c/0x3610 fs/ext4/mballoc.c:2614 ext4_mb_new_blocks+0xfd3/0x48f0 fs/ext4/mballoc.c:5611 ext4_ext_map_blocks+0x19ca/0x71e0 fs/ext4/extents.c:4287 ext4_map_blocks+0xa42/0x1ce0 fs/ext4/inode.c:651 ext4_iomap_alloc fs/ext4/inode.c:3422 [inline] ext4_iomap_begin+0x824/0xd10 fs/ext4/inode.c:3472 iomap_iter+0x5c1/0xbf0 fs/iomap/iter.c:74 __iomap_dio_rw+0xddc/0x20a0 fs/iomap/direct-io.c:601 iomap_dio_rw+0x41/0x90 fs/iomap/direct-io.c:690 ext4_dio_write_iter fs/ext4/file.c:587 [inline] ext4_file_write_iter+0x1123/0x1cf0 fs/ext4/file.c:698 call_write_iter include/linux/fs.h:2215 [inline] new_sync_write fs/read_write.c:491 [inline] vfs_write+0x8d1/0xe80 fs/read_write.c:584 ksys_write+0x199/0x2c0 fs/read_write.c:637 __do_sys_write fs/read_write.c:649 [inline] __se_sys_write fs/read_write.c:646 [inline] __x64_sys_write+0x7b/0x90 fs/read_write.c:646 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f781ea7cb29 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 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 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f781f7360c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007f781eb9bf80 RCX: 00007f781ea7cb29 RDX: 000000000002a000 RSI: 0000000020000000 RDI: 0000000000000004 RBP: 00007f781eac847a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007f781eb9bf80 R15: 00007ffc27ce3e58 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:ext4_get_group_info fs/ext4/ext4.h:3331 [inline] RIP: 0010:ext4_mb_find_by_goal+0xdf4/0xe30 fs/ext4/mballoc.c:2162 Code: c4 ff e9 b5 fb ff ff e8 ba 55 7e ff 49 bc 00 00 00 00 00 fc ff df e9 6f f7 ff ff e8 a6 55 7e ff e9 51 f7 ff ff e8 9c 55 7e ff <0f> 0b e8 a5 3f f8 02 e8 90 55 7e ff 0f 0b e8 89 55 7e ff 0f 0b e8 RSP: 0018:ffffc900034beb00 EFLAGS: 00010246 RAX: ffffffff81f68f74 RBX: 0000000000000001 RCX: 0000000000040000 RDX: ffffc90006aad000 RSI: 000000000003ffff RDI: 0000000000040000 RBP: ffffc900034bec10 R08: ffffffff81f682ab R09: ffffed102c069c32 R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff11023fcd879 R13: 0000000000000001 R14: 1ffff92000697d70 R15: ffff88811fe6c3c8 FS: 00007f781f7366c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f033ce3f000 CR3: 0000000119d79000 CR4: 00000000003506b0 DR0: 00000000ffff070c DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400