Date | Name | Commit | Repro | Result |
---|---|---|---|---|
2025/09/19 | upstream (ToT) | 1522b530ac3e | syz | [report] possible deadlock in nr_rt_device_down |
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Date | Name | Commit | Repro | Result |
---|---|---|---|---|
2025/09/19 | upstream (ToT) | 1522b530ac3e | syz | [report] possible deadlock in nr_rt_device_down |
Kernel | Title | Rank 🛈 | Repro | Cause bisect | Fix bisect | Count | Last | Reported | Patched | Status |
---|---|---|---|---|---|---|---|---|---|---|
upstream | possible deadlock in nr_rt_device_down (2) hams | 4 | 2 | 451d | 451d | 0/29 | closed as invalid on 2024/09/04 18:18 | |||
upstream | possible deadlock in nr_rt_device_down (3) hams | 4 | C | error | 7838 | now | 401d | 0/29 | upstream: reported C repro on 2024/09/14 18:32 | |
linux-6.1 | possible deadlock in nr_rt_device_down origin:upstream | 4 | C | error | 74 | 17d | 292d | 0/3 | upstream: reported C repro on 2025/01/01 09:10 | |
linux-5.15 | possible deadlock in nr_rt_device_down origin:upstream | 4 | C | error | 78 | 8d22h | 527d | 0/3 | upstream: reported C repro on 2024/05/12 01:54 |
====================================================== WARNING: possible circular locking dependency detected syzkaller #0 Not tainted ------------------------------------------------------ syz.1.2292/10680 is trying to acquire lock: ffff8880205d9c70 (&nr_node->node_lock){+...}-{2:2}, at: spin_lock_bh include/linux/spinlock.h:356 [inline] ffff8880205d9c70 (&nr_node->node_lock){+...}-{2:2}, at: nr_node_lock include/net/netrom.h:152 [inline] ffff8880205d9c70 (&nr_node->node_lock){+...}-{2:2}, at: nr_rt_device_down+0x12a/0x720 net/netrom/nr_route.c:519 but task is already holding lock: ffffffff8e119c78 (nr_node_list_lock){+...}-{2:2}, at: spin_lock_bh include/linux/spinlock.h:356 [inline] ffffffff8e119c78 (nr_node_list_lock){+...}-{2:2}, at: nr_rt_device_down+0xa9/0x720 net/netrom/nr_route.c:517 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #2 (nr_node_list_lock){+...}-{2:2}: __raw_spin_lock_bh include/linux/spinlock_api_smp.h:126 [inline] _raw_spin_lock_bh+0x36/0x50 kernel/locking/spinlock.c:178 spin_lock_bh include/linux/spinlock.h:356 [inline] nr_rt_device_down+0xa9/0x720 net/netrom/nr_route.c:517 nr_device_event+0x137/0x150 net/netrom/af_netrom.c:126 notifier_call_chain+0x197/0x390 kernel/notifier.c:93 call_netdevice_notifiers_extack net/core/dev.c:2064 [inline] call_netdevice_notifiers net/core/dev.c:2078 [inline] __dev_notify_flags+0x18e/0x2e0 net/core/dev.c:-1 dev_change_flags+0xe8/0x1a0 net/core/dev.c:8762 dev_ifsioc+0x6a7/0xe20 net/core/dev_ioctl.c:529 dev_ioctl+0x7e2/0x1170 net/core/dev_ioctl.c:786 sock_do_ioctl+0x226/0x2f0 net/socket.c:1236 sock_ioctl+0x623/0x7a0 net/socket.c:1341 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:871 [inline] __se_sys_ioctl+0xfd/0x170 fs/ioctl.c:857 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 -> #1 (nr_neigh_list_lock){+...}-{2:2}: __raw_spin_lock_bh include/linux/spinlock_api_smp.h:126 [inline] _raw_spin_lock_bh+0x36/0x50 kernel/locking/spinlock.c:178 spin_lock_bh include/linux/spinlock.h:356 [inline] nr_remove_neigh+0x25/0xe0 net/netrom/nr_route.c:307 nr_add_node+0x1d2d/0x24b0 net/netrom/nr_route.c:249 nr_rt_ioctl+0xc0f/0xd40 net/netrom/nr_route.c:651 sock_do_ioctl+0xd7/0x2f0 net/socket.c:1222 sock_ioctl+0x623/0x7a0 net/socket.c:1341 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:871 [inline] __se_sys_ioctl+0xfd/0x170 fs/ioctl.c:857 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 -> #0 (&nr_node->node_lock){+...}-{2:2}: check_prev_add kernel/locking/lockdep.c:3134 [inline] check_prevs_add kernel/locking/lockdep.c:3253 [inline] validate_chain kernel/locking/lockdep.c:3869 [inline] __lock_acquire+0x2ddb/0x7c80 kernel/locking/lockdep.c:5137 lock_acquire+0x197/0x410 kernel/locking/lockdep.c:5754 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:126 [inline] _raw_spin_lock_bh+0x36/0x50 kernel/locking/spinlock.c:178 spin_lock_bh include/linux/spinlock.h:356 [inline] nr_node_lock include/net/netrom.h:152 [inline] nr_rt_device_down+0x12a/0x720 net/netrom/nr_route.c:519 nr_device_event+0x137/0x150 net/netrom/af_netrom.c:126 notifier_call_chain+0x197/0x390 kernel/notifier.c:93 call_netdevice_notifiers_extack net/core/dev.c:2064 [inline] call_netdevice_notifiers net/core/dev.c:2078 [inline] __dev_notify_flags+0x18e/0x2e0 net/core/dev.c:-1 dev_change_flags+0xe8/0x1a0 net/core/dev.c:8762 dev_ifsioc+0x6a7/0xe20 net/core/dev_ioctl.c:529 dev_ioctl+0x7e2/0x1170 net/core/dev_ioctl.c:786 sock_do_ioctl+0x226/0x2f0 net/socket.c:1236 sock_ioctl+0x623/0x7a0 net/socket.c:1341 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:871 [inline] __se_sys_ioctl+0xfd/0x170 fs/ioctl.c:857 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 other info that might help us debug this: Chain exists of: &nr_node->node_lock --> nr_neigh_list_lock --> nr_node_list_lock Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(nr_node_list_lock); lock(nr_neigh_list_lock); lock(nr_node_list_lock); lock(&nr_node->node_lock); *** DEADLOCK *** 3 locks held by syz.1.2292/10680: #0: ffffffff8dfbc908 (rtnl_mutex){+.+.}-{3:3}, at: dev_ioctl+0x7d2/0x1170 net/core/dev_ioctl.c:785 #1: ffffffff8e119c18 (nr_neigh_list_lock){+...}-{2:2}, at: spin_lock_bh include/linux/spinlock.h:356 [inline] #1: ffffffff8e119c18 (nr_neigh_list_lock){+...}-{2:2}, at: nr_rt_device_down+0x28/0x720 net/netrom/nr_route.c:514 #2: ffffffff8e119c78 (nr_node_list_lock){+...}-{2:2}, at: spin_lock_bh include/linux/spinlock.h:356 [inline] #2: ffffffff8e119c78 (nr_node_list_lock){+...}-{2:2}, at: nr_rt_device_down+0xa9/0x720 net/netrom/nr_route.c:517 stack backtrace: CPU: 1 PID: 10680 Comm: syz.1.2292 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025 Call Trace: <TASK> dump_stack_lvl+0x16c/0x230 lib/dump_stack.c:106 check_noncircular+0x2bd/0x3c0 kernel/locking/lockdep.c:2187 check_prev_add kernel/locking/lockdep.c:3134 [inline] check_prevs_add kernel/locking/lockdep.c:3253 [inline] validate_chain kernel/locking/lockdep.c:3869 [inline] __lock_acquire+0x2ddb/0x7c80 kernel/locking/lockdep.c:5137 lock_acquire+0x197/0x410 kernel/locking/lockdep.c:5754 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:126 [inline] _raw_spin_lock_bh+0x36/0x50 kernel/locking/spinlock.c:178 spin_lock_bh include/linux/spinlock.h:356 [inline] nr_node_lock include/net/netrom.h:152 [inline] nr_rt_device_down+0x12a/0x720 net/netrom/nr_route.c:519 nr_device_event+0x137/0x150 net/netrom/af_netrom.c:126 notifier_call_chain+0x197/0x390 kernel/notifier.c:93 call_netdevice_notifiers_extack net/core/dev.c:2064 [inline] call_netdevice_notifiers net/core/dev.c:2078 [inline] __dev_notify_flags+0x18e/0x2e0 net/core/dev.c:-1 dev_change_flags+0xe8/0x1a0 net/core/dev.c:8762 dev_ifsioc+0x6a7/0xe20 net/core/dev_ioctl.c:529 dev_ioctl+0x7e2/0x1170 net/core/dev_ioctl.c:786 sock_do_ioctl+0x226/0x2f0 net/socket.c:1236 sock_ioctl+0x623/0x7a0 net/socket.c:1341 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:871 [inline] __se_sys_ioctl+0xfd/0x170 fs/ioctl.c:857 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7f41a618eba9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f41a7084038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f41a63d5fa0 RCX: 00007f41a618eba9 RDX: 0000200000000000 RSI: 0000000000008914 RDI: 0000000000000006 RBP: 00007f41a6211e19 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f41a63d6038 R14: 00007f41a63d5fa0 R15: 00007ffc1e84e1d8 </TASK>
Time | Kernel | Commit | Syzkaller | Config | Log | Report | Syz repro | C repro | VM info | Assets (help?) | Manager | Title |
---|---|---|---|---|---|---|---|---|---|---|---|---|
2025/09/18 10:28 | linux-6.6.y | 60a9e718726f | e2beed91 | .config | console log | report | syz / log | [disk image] [vmlinux] [kernel image] | ci2-linux-6-6-kasan | possible deadlock in nr_rt_device_down | ||
2025/10/07 16:20 | linux-6.6.y | e617101e5626 | 8ef35d49 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-6-6-kasan | possible deadlock in nr_rt_device_down | ||
2025/09/18 12:56 | linux-6.6.y | 60a9e718726f | e2beed91 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-6-6-kasan | possible deadlock in nr_rt_device_down | ||
2025/09/18 05:25 | linux-6.6.y | 60a9e718726f | e2beed91 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-6-6-kasan | possible deadlock in nr_rt_device_down | ||
2025/09/18 05:24 | linux-6.6.y | 60a9e718726f | e2beed91 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-6-6-kasan | possible deadlock in nr_rt_device_down | ||
2025/09/18 03:29 | linux-6.6.y | 60a9e718726f | e2beed91 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-6-6-kasan | possible deadlock in nr_rt_device_down | ||
2025/09/18 03:26 | linux-6.6.y | 60a9e718726f | e2beed91 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-6-6-kasan | possible deadlock in nr_rt_device_down | ||
2025/09/18 03:22 | linux-6.6.y | 60a9e718726f | e2beed91 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-6-6-kasan | possible deadlock in nr_rt_device_down | ||
2025/08/01 03:02 | linux-6.6.y | dbcb8d8e4163 | 0c075d67 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-6-6-kasan | possible deadlock in nr_rt_device_down | ||
2025/08/01 03:02 | linux-6.6.y | dbcb8d8e4163 | 0c075d67 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-6-6-kasan | possible deadlock in nr_rt_device_down | ||
2025/07/31 14:27 | linux-6.6.y | dbcb8d8e4163 | f8f2b4da | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-6-6-kasan | possible deadlock in nr_rt_device_down | ||
2025/07/09 16:08 | linux-6.6.y | a5df3a702b2c | f4e5e155 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-6-6-kasan | possible deadlock in nr_rt_device_down | ||
2025/07/09 16:08 | linux-6.6.y | a5df3a702b2c | f4e5e155 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-6-6-kasan | possible deadlock in nr_rt_device_down |