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Fri, 12 Sep 2025 13:50:03 -0700 (PDT) Date: Fri, 12 Sep 2025 13:50:03 -0700 In-Reply-To: <68232e7b.050a0220.f2294.09f6.GAE@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <68c4877b.050a0220.2ff435.0362.GAE@google.com> Subject: Forwarded: Re: [syzbot] [rdma?] WARNING in gid_table_release_one (3) From: syzbot To: linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" For archival purposes, forwarding an incoming command email to linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com. *** Subject: Re: [syzbot] [rdma?] WARNING in gid_table_release_one (3) Author: yanjun.zhu@linux.dev #syz test: https://github.com/zhuyj/linux.git v6.17_fix_gid_table_release_one On 9/11/25 8:34 AM, syzbot wrote: > syzbot has found a reproducer for the following issue on: > > HEAD commit: 5f540c4aade9 Add linux-next specific files for 20250910 > git tree: linux-next > console output: https://syzkaller.appspot.com/x/log.txt?x=157dab12580000 > kernel config: https://syzkaller.appspot.com/x/.config?x=5ed48faa2cb8510d > dashboard link: https://syzkaller.appspot.com/bug?extid=b0da83a6c0e2e2bddbd4 > compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=15b52362580000 > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=16b41642580000 > > Downloadable assets: > disk image: https://storage.googleapis.com/syzbot-assets/df0dfb072f52/disk-5f540c4a.raw.xz > vmlinux: https://storage.googleapis.com/syzbot-assets/20649042ae30/vmlinux-5f540c4a.xz > kernel image: https://storage.googleapis.com/syzbot-assets/4c16358268b8/bzImage-5f540c4a.xz > > IMPORTANT: if you fix the issue, please add the following tag to the commit: > Reported-by: syzbot+b0da83a6c0e2e2bddbd4@syzkaller.appspotmail.com > > ------------[ cut here ]------------ > GID entry ref leak for dev syz1 index 2 ref=615 > WARNING: drivers/infiniband/core/cache.c:809 at release_gid_table drivers/infiniband/core/cache.c:806 [inline], CPU#0: kworker/u8:2/36 > WARNING: drivers/infiniband/core/cache.c:809 at gid_table_release_one+0x346/0x4d0 drivers/infiniband/core/cache.c:886, CPU#0: kworker/u8:2/36 > Modules linked in: > CPU: 0 UID: 0 PID: 36 Comm: kworker/u8:2 Not tainted syzkaller #0 PREEMPT(full) > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025 > Workqueue: ib-unreg-wq ib_unregister_work > RIP: 0010:release_gid_table drivers/infiniband/core/cache.c:806 [inline] > RIP: 0010:gid_table_release_one+0x346/0x4d0 drivers/infiniband/core/cache.c:886 > Code: e8 03 48 b9 00 00 00 00 00 fc ff df 0f b6 04 08 84 c0 75 3d 41 8b 0e 48 c7 c7 a0 43 91 8c 4c 89 e6 44 89 fa e8 fb 67 f5 f8 90 <0f> 0b 90 90 e9 e3 fe ff ff 44 89 e9 80 e1 07 80 c1 03 38 c1 0f 8c > RSP: 0018:ffffc90000ac7908 EFLAGS: 00010246 > RAX: 621d731dcb27e200 RBX: ffff88806241b8d8 RCX: ffff888141289e40 > RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000002 > RBP: 1ffff1100c48371b R08: ffff8880b8724253 R09: 1ffff110170e484a > R10: dffffc0000000000 R11: ffffed10170e484b R12: ffff888027503e00 > R13: ffff88806241b800 R14: ffff8880289a2400 R15: 0000000000000002 > FS: 0000000000000000(0000) GS:ffff8881259f0000(0000) knlGS:0000000000000000 > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > CR2: 0000555569847588 CR3: 00000000338c8000 CR4: 00000000003526f0 > Call Trace: > > ib_device_release+0xd2/0x1c0 drivers/infiniband/core/device.c:509 > device_release+0x99/0x1c0 drivers/base/core.c:-1 > kobject_cleanup lib/kobject.c:689 [inline] > kobject_release lib/kobject.c:720 [inline] > kref_put include/linux/kref.h:65 [inline] > kobject_put+0x228/0x480 lib/kobject.c:737 > process_one_work kernel/workqueue.c:3263 [inline] > process_scheduled_works+0xae1/0x17b0 kernel/workqueue.c:3346 > worker_thread+0x8a0/0xda0 kernel/workqueue.c:3427 > kthread+0x711/0x8a0 kernel/kthread.c:463 > ret_from_fork+0x47c/0x820 arch/x86/kernel/process.c:158 > ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 > > > > --- > 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.