On Fri, Mar 18, 2022 at 09:39:20AM -0700, syzbot wrote: > Hello, > > syzbot found the following issue on: > > HEAD commit: 91265a6da44d Add linux-next specific files for 20220303 > git tree: linux-next > console output: https://syzkaller.appspot.com/x/log.txt?x=11007413700000 > kernel config: https://syzkaller.appspot.com/x/.config?x=617f79440a35673a > dashboard link: https://syzkaller.appspot.com/bug?extid=f05ba4652c0471416eaf > 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=137f17d9700000 > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=114ebabd700000 > > IMPORTANT: if you fix the issue, please add the following tag to the commit: > Reported-by: [email protected]
It has already been fixed with https://lore.kernel.org/r/[email protected] #syz test: https://git.kernel.org/pub/scm/linux/kernel/git/xiang/erofs.git dev Thanks, Gao Xiang > > RBP: 00007fff8eeb06e0 R08: 00007fff8eeb0720 R09: 0000000000000000 > R10: 0000000000000000 R11: 0000000000000286 R12: 00000000200000b0 > R13: 0000000000000004 R14: 0000000000000005 R15: 0000000000000002 > </TASK> > ------------[ cut here ]------------ > kobject: '(null)' (ffff888077324190): is not initialized, yet kobject_put() > is being called. > WARNING: CPU: 0 PID: 3610 at lib/kobject.c:750 kobject_put+0x22b/0x540 > lib/kobject.c:750 > Modules linked in: > CPU: 0 PID: 3610 Comm: syz-executor471 Not tainted > 5.17.0-rc6-next-20220303-syzkaller #0 > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS > Google 01/01/2011 > RIP: 0010:kobject_put+0x22b/0x540 lib/kobject.c:750 > Code: e8 6a 83 67 fd 48 89 e8 48 c1 e8 03 42 80 3c 20 00 0f 85 94 02 00 00 48 > 8b 75 00 48 89 ea 48 c7 c7 c0 0d 2a 8a e8 c1 5b 07 05 <0f> 0b e9 32 fe ff ff > e8 39 83 67 fd 4d 89 f9 48 89 e9 4c 89 f2 49 > RSP: 0018:ffffc90003b9fc48 EFLAGS: 00010286 > RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 > RDX: ffff88801c67ba80 RSI: ffffffff81602878 RDI: fffff52000773f7b > RBP: ffff888077324190 R08: 0000000000000000 R09: 0000000000000000 > R10: ffffffff815fd23e R11: 0000000000000000 R12: dffffc0000000000 > R13: ffff8880773241cc R14: ffff888073799cf8 R15: ffff8880207dc068 > FS: 0000555556165300(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > CR2: 00007fff8eeb1000 CR3: 000000001ac3f000 CR4: 00000000003506f0 > DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 > DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 > Call Trace: > <TASK> > erofs_unregister_sysfs+0x46/0x60 fs/erofs/sysfs.c:225 > erofs_put_super+0x37/0xb0 fs/erofs/super.c:771 > generic_shutdown_super+0x14c/0x400 fs/super.c:462 > kill_block_super+0x97/0xf0 fs/super.c:1394 > erofs_kill_sb+0x60/0x190 fs/erofs/super.c:752 > deactivate_locked_super+0x94/0x160 fs/super.c:332 > get_tree_bdev+0x573/0x760 fs/super.c:1294 > vfs_get_tree+0x89/0x2f0 fs/super.c:1497 > do_new_mount fs/namespace.c:3025 [inline] > path_mount+0x1320/0x1fa0 fs/namespace.c:3355 > do_mount fs/namespace.c:3368 [inline] > __do_sys_mount fs/namespace.c:3576 [inline] > __se_sys_mount fs/namespace.c:3553 [inline] > __x64_sys_mount+0x27f/0x300 fs/namespace.c:3553 > 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: 0033:0x7fa80fa1344a > Code: 48 c7 c2 c0 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff eb d2 e8 a8 00 00 00 > 0f 1f 84 00 00 00 00 00 49 89 ca b8 a5 00 00 00 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:00007fff8eeb06c8 EFLAGS: 00000286 ORIG_RAX: 00000000000000a5 > RAX: ffffffffffffffda RBX: 00007fff8eeb0720 RCX: 00007fa80fa1344a > RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007fff8eeb06e0 > RBP: 00007fff8eeb06e0 R08: 00007fff8eeb0720 R09: 0000000000000000 > R10: 0000000000000000 R11: 0000000000000286 R12: 00000000200000b0 > R13: 0000000000000004 R14: 0000000000000005 R15: 0000000000000002 > </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 [email protected]. > > syzbot will keep track of this issue. See: > https://goo.gl/tpsmEJ#status for how to communicate with syzbot. > syzbot can test patches for this issue, for details see: > https://goo.gl/tpsmEJ#testing-patches
