Hello, syzbot found the following issue on: HEAD commit: 1f6ce8392d6f Add linux-next specific files for 20230613 git tree: linux-next console+strace: https://syzkaller.appspot.com/x/log.txt?x=17899407280000 kernel config: https://syzkaller.appspot.com/x/.config?x=d103d5f9125e9fe9 dashboard link: https://syzkaller.appspot.com/bug?extid=00cd27751f78817f167b compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=16102c55280000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1202453b280000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/2d9bf45aeae9/disk-1f6ce839.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/e0b03ef83e17/vmlinux-1f6ce839.xz kernel image: https://storage.googleapis.com/syzbot-assets/b6c21a24174d/bzImage-1f6ce839.xz The issue was bisected to: commit 2736e8eeb0ccdc71d1f4256c9c9a28f58cc43307 Author: Christoph Hellwig <hch@xxxxxx> Date: Thu Jun 8 11:02:43 2023 +0000 block: use the holder as indication for exclusive opens bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=1164889b280000 final oops: https://syzkaller.appspot.com/x/report.txt?x=1364889b280000 console output: https://syzkaller.appspot.com/x/log.txt?x=1564889b280000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+00cd27751f78817f167b@xxxxxxxxxxxxxxxxxxxxxxxxx Fixes: 2736e8eeb0cc ("block: use the holder as indication for exclusive opens") ------------[ cut here ]------------ WARNING: CPU: 1 PID: 5024 at block/bdev.c:794 blkdev_get_by_dev.part.0+0x8ea/0xb50 block/bdev.c:794 Modules linked in: CPU: 1 PID: 5024 Comm: syz-executor231 Not tainted 6.4.0-rc6-next-20230613-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/25/2023 RIP: 0010:blkdev_get_by_dev.part.0+0x8ea/0xb50 block/bdev.c:794 Code: 44 24 08 e8 c8 94 7c fd 48 85 ed 4c 63 6c 24 08 0f 85 5f fe ff ff e9 ca fe ff ff e8 40 62 e3 fd e9 fe f8 ff ff e8 86 23 90 fd <0f> 0b 49 c7 c5 fb ff ff ff e9 c2 fe ff ff e8 73 23 90 fd 48 8b 44 RSP: 0018:ffffc90003a0fc98 EFLAGS: 00010293 RAX: 0000000000000000 RBX: ffff88801e5f2e00 RCX: 0000000000000000 RDX: ffff88807e089dc0 RSI: ffffffff83f4524a RDI: 0000000000000005 RBP: 0000000000000000 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000004 R11: 0000000000000001 R12: ffff88801fc56000 R13: 0000000000000005 R14: 0000000000000000 R15: 0000000000000004 FS: 0000555556bcf300(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000005fdeb8 CR3: 000000007ceb9000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> blkdev_get_by_dev+0x79/0x80 block/bdev.c:845 disk_scan_partitions+0x1e2/0x300 block/genhd.c:368 blkdev_common_ioctl+0x5b8/0x1a40 block/ioctl.c:531 blkdev_ioctl+0x24f/0x760 block/ioctl.c:600 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:870 [inline] __se_sys_ioctl fs/ioctl.c:856 [inline] __x64_sys_ioctl+0x19d/0x210 fs/ioctl.c:856 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f9e3c0e35c9 Code: 28 c3 e8 2a 14 00 00 66 2e 0f 1f 84 00 00 00 00 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 c0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffc336b7018 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f9e3c0e35c9 RDX: 0000000000000000 RSI: 000000000000125f RDI: 0000000000000003 RBP: 00007f9e3c0a30d0 R08: 0000000000000000 R09: 0000000000000000 R10: 000000000000ffff R11: 0000000000000246 R12: 00007f9e3c0a3160 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 </TASK> --- 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. For information about bisection process see: https://goo.gl/tpsmEJ#bisection If the bug is already fixed, 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 change bug's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the bug is a duplicate of another bug, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup
