Hello, syzbot found the following issue on: HEAD commit: 2d5404caa8c7 Linux 6.12-rc7 git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=14f7b35f980000 kernel config: https://syzkaller.appspot.com/x/.config?x=1503500c6f615d24 dashboard link: https://syzkaller.appspot.com/bug?extid=823cd0d24881f21ab9f1 compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=16f7b35f980000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=12188ce8580000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/a2d329b82126/disk-2d5404ca.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/37a04ca225dd/vmlinux-2d5404ca.xz kernel image: https://storage.googleapis.com/syzbot-assets/4f837ce9d9dc/bzImage-2d5404ca.xz mounted in repro #1: https://storage.googleapis.com/syzbot-assets/6696bb7d0ad1/mount_0.gz mounted in repro #2: https://storage.googleapis.com/syzbot-assets/c4373413d8ae/mount_5.gz The issue was bisected to: commit f761fcdd289d07e8547fef7ac76c3760fc7803f2 Author: Dongliang Cui <dongliang.cui@xxxxxxxxxx> Date: Tue Sep 17 22:40:05 2024 +0000 exfat: Implement sops->shutdown and ioctl bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=129df35f980000 final oops: https://syzkaller.appspot.com/x/report.txt?x=119df35f980000 console output: https://syzkaller.appspot.com/x/log.txt?x=169df35f980000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+823cd0d24881f21ab9f1@xxxxxxxxxxxxxxxxxxxxxxxxx Fixes: f761fcdd289d ("exfat: Implement sops->shutdown and ioctl") ------------[ cut here ]------------ WARNING: CPU: 0 PID: 9 at kernel/rcu/sync.c:177 rcu_sync_dtor+0xcd/0x180 kernel/rcu/sync.c:177 Modules linked in: CPU: 0 UID: 0 PID: 9 Comm: kworker/0:1 Not tainted 6.12.0-rc7-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024 Workqueue: events destroy_super_work RIP: 0010:rcu_sync_dtor+0xcd/0x180 kernel/rcu/sync.c:177 Code: 74 19 e8 96 dd 00 00 43 0f b6 44 25 00 84 c0 0f 85 82 00 00 00 41 83 3f 00 75 1d 5b 41 5c 41 5d 41 5e 41 5f c3 cc cc cc cc 90 <0f> 0b 90 e9 66 ff ff ff 90 0f 0b 90 eb 89 90 0f 0b 90 eb dd 44 89 RSP: 0018:ffffc900000e7b30 EFLAGS: 00010246 RAX: 0000000000000002 RBX: 1ffff1100fba4077 RCX: ffff88801d2b8000 RDX: 0000000000000000 RSI: ffffffff8c603640 RDI: ffff88807dd20350 RBP: 00000000000001e4 R08: ffffffff820ee1c4 R09: 1ffffffff1cfbc21 R10: dffffc0000000000 R11: fffffbfff1cfbc22 R12: dffffc0000000000 R13: 1ffff1100fba406a R14: ffff88807dd20350 R15: ffff88807dd20350 FS: 0000000000000000(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000555567cdece8 CR3: 0000000030508000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> percpu_free_rwsem+0x41/0x80 kernel/locking/percpu-rwsem.c:42 destroy_super_work+0xef/0x130 fs/super.c:282 process_one_work kernel/workqueue.c:3229 [inline] process_scheduled_works+0xa63/0x1850 kernel/workqueue.c:3310 worker_thread+0x870/0xd30 kernel/workqueue.c:3391 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 </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 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
