Hello, syzbot found the following issue on: HEAD commit: 98b1cc82c4af Linux 6.7-rc2 git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=11583b58e80000 kernel config: https://syzkaller.appspot.com/x/.config?x=aec35c1281ec0aaf dashboard link: https://syzkaller.appspot.com/bug?extid=64f520f6fe02b8947407 compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=163a9768e80000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/b60687e82ad4/disk-98b1cc82.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/29477f0b04df/vmlinux-98b1cc82.xz kernel image: https://storage.googleapis.com/syzbot-assets/9aab12888a60/bzImage-98b1cc82.xz mounted in repro: https://storage.googleapis.com/syzbot-assets/9009db42dccd/mount_0.gz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+64f520f6fe02b8947407@xxxxxxxxxxxxxxxxxxxxxxxxx ------------[ cut here ]------------ kernel BUG at fs/ext4/mballoc.c:5300! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 10719 Comm: syz-executor.1 Not tainted 6.7.0-rc2-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023 RIP: 0010:ext4_mb_release_inode_pa.isra.0+0xa30/0xb80 fs/ext4/mballoc.c:5300 Code: b5 fb ff ff e8 a1 1a 50 ff 90 0f 0b e8 99 1a 50 ff 31 ff 44 89 ee e8 ff 15 50 ff 45 85 ed 0f 84 81 f8 ff ff e8 81 1a 50 ff 90 <0f> 0b e8 69 e7 a5 ff e9 e5 f6 ff ff 48 89 d7 e8 5c e7 a5 ff e9 4a RSP: 0018:ffffc9000a1af690 EFLAGS: 00010293 RAX: 0000000000000000 RBX: 00000000ffffe428 RCX: ffffffff823665c1 RDX: ffff88802b52a1c0 RSI: ffffffff823665cf RDI: 0000000000000005 RBP: 0000000000000000 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000002 R11: 0000000000000005 R12: ffff88806442ac08 R13: 0000000000000002 R14: 1ffff92001435ee1 R15: ffff88806440c868 FS: 00007fbecfbfe6c0(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020027040 CR3: 000000007c40e000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> ext4_discard_preallocations+0x796/0xfb0 fs/ext4/mballoc.c:5581 ext4_truncate+0xd27/0x1310 fs/ext4/inode.c:4166 ext4_truncate_failed_write fs/ext4/truncate.h:22 [inline] ext4_write_end+0xa8a/0xed0 fs/ext4/inode.c:1323 ext4_da_write_end+0x926/0x1170 fs/ext4/inode.c:3019 generic_perform_write+0x32f/0x600 mm/filemap.c:3929 ext4_buffered_write_iter+0x11f/0x3c0 fs/ext4/file.c:299 ext4_file_write_iter+0x819/0x1950 fs/ext4/file.c:696 call_write_iter include/linux/fs.h:2020 [inline] new_sync_write fs/read_write.c:491 [inline] vfs_write+0x64f/0xdf0 fs/read_write.c:584 ksys_write+0x12f/0x250 fs/read_write.c:637 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x40/0x110 arch/x86/entry/common.c:82 entry_SYSCALL_64_after_hwframe+0x63/0x6b RIP: 0033:0x7fbed087cae9 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:00007fbecfbfe0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007fbed099bf80 RCX: 00007fbed087cae9 RDX: 000000000208e24b RSI: 0000000020000040 RDI: 0000000000000004 RBP: 00007fbed08c847a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007fbed099bf80 R15: 00007ffd459e66e8 </TASK> Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:ext4_mb_release_inode_pa.isra.0+0xa30/0xb80 fs/ext4/mballoc.c:5300 Code: b5 fb ff ff e8 a1 1a 50 ff 90 0f 0b e8 99 1a 50 ff 31 ff 44 89 ee e8 ff 15 50 ff 45 85 ed 0f 84 81 f8 ff ff e8 81 1a 50 ff 90 <0f> 0b e8 69 e7 a5 ff e9 e5 f6 ff ff 48 89 d7 e8 5c e7 a5 ff e9 4a RSP: 0018:ffffc9000a1af690 EFLAGS: 00010293 RAX: 0000000000000000 RBX: 00000000ffffe428 RCX: ffffffff823665c1 RDX: ffff88802b52a1c0 RSI: ffffffff823665cf RDI: 0000000000000005 RBP: 0000000000000000 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000002 R11: 0000000000000005 R12: ffff88806442ac08 R13: 0000000000000002 R14: 1ffff92001435ee1 R15: ffff88806440c868 FS: 00007fbecfbfe6c0(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020027040 CR3: 000000007c40e000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@xxxxxxxxxxxxxxxx. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing. If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup
