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| ID | Workflow | Result | Correct | Bug | Created | Started | Finished | Revision | Error |
|---|---|---|---|---|---|---|---|---|---|
| 0225e205-8d5a-40ae-9013-9cbb901db54e | repro | ❓ | KCSAN: data-race in fib_table_lookup / fib_table_lookup (4) | 2026/03/09 23:16 | 2026/03/09 23:16 | 2026/03/09 23:46 | 6972f30219093b03bcc1a54487e12a7097245c01 | ||
| cf630462-36cb-4c04-8a37-262ade83c62f | assessment-kcsan | Benign: ✅ Confident: ✅ | ❓ | KCSAN: data-race in fib_table_lookup / fib_table_lookup (4) | 2026/01/27 09:55 | 2026/01/27 09:55 | 2026/01/27 10:05 | b3ce4d18c7b05999fd01cb28e254ebf79ba8ec2f |
| Title | Replies (including bot) | Last reply |
|---|---|---|
| [PATCH 6.19 314/844] ipv4: fib: Annotate access to struct fib_alias.fa_state. | 1 (1) | 2026/02/28 17:23 |
| [PATCH AUTOSEL 6.19-5.10] ipv4: fib: Annotate access to struct fib_alias.fa_state. | 1 (1) | 2026/02/14 21:23 |
| [PATCH v1 net-next] ipv4: fib: Annotate access to struct fib_alias.fa_state. | 3 (3) | 2026/01/29 03:50 |
| [syzbot] [net?] KCSAN: data-race in fib_table_lookup / fib_table_lookup (4) | 0 (1) | 2026/01/27 04:27 |
| Kernel | Title | Rank 🛈 | Repro | Cause bisect | Fix bisect | Count | Last | Reported | Patched | Status |
|---|---|---|---|---|---|---|---|---|---|---|
| upstream | KCSAN: data-race in fib_table_lookup / fib_table_lookup net | 6 | 1 | 696d | 696d | 0/29 | auto-obsoleted due to no activity on 2024/05/21 11:44 | |||
| upstream | KCSAN: data-race in fib_table_lookup / fib_table_lookup (3) net | 6 | 1 | 368d | 368d | 0/29 | auto-obsoleted due to no activity on 2025/05/06 06:58 | |||
| upstream | KCSAN: data-race in fib_table_lookup / fib_table_lookup (2) net | 6 | 1 | 619d | 619d | 0/29 | auto-obsoleted due to no activity on 2024/08/07 11:31 |
================================================================== BUG: KCSAN: data-race in fib_table_lookup / fib_table_lookup write to 0xffff88811b06a7fa of 1 bytes by task 4167 on cpu 0: fib_alias_accessed net/ipv4/fib_lookup.h:32 [inline] fib_table_lookup+0x361/0xd60 net/ipv4/fib_trie.c:1565 fib_lookup include/net/ip_fib.h:390 [inline] ip_route_output_key_hash_rcu+0x378/0x1380 net/ipv4/route.c:2814 ip_route_output_key_hash net/ipv4/route.c:2705 [inline] __ip_route_output_key include/net/route.h:169 [inline] ip_route_output_flow+0x65/0x110 net/ipv4/route.c:2932 udp_sendmsg+0x13c3/0x15d0 net/ipv4/udp.c:1450 inet_sendmsg+0xac/0xd0 net/ipv4/af_inet.c:859 sock_sendmsg_nosec net/socket.c:727 [inline] __sock_sendmsg net/socket.c:742 [inline] ____sys_sendmsg+0x53a/0x600 net/socket.c:2592 ___sys_sendmsg+0x195/0x1e0 net/socket.c:2646 __sys_sendmmsg+0x185/0x320 net/socket.c:2735 __do_sys_sendmmsg net/socket.c:2762 [inline] __se_sys_sendmmsg net/socket.c:2759 [inline] __x64_sys_sendmmsg+0x57/0x70 net/socket.c:2759 x64_sys_call+0x1e28/0x3000 arch/x86/include/generated/asm/syscalls_64.h:308 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xc0/0x2a0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f read to 0xffff88811b06a7fa of 1 bytes by task 4168 on cpu 1: fib_alias_accessed net/ipv4/fib_lookup.h:31 [inline] fib_table_lookup+0x338/0xd60 net/ipv4/fib_trie.c:1565 fib_lookup include/net/ip_fib.h:390 [inline] ip_route_output_key_hash_rcu+0x378/0x1380 net/ipv4/route.c:2814 ip_route_output_key_hash net/ipv4/route.c:2705 [inline] __ip_route_output_key include/net/route.h:169 [inline] ip_route_output_flow+0x65/0x110 net/ipv4/route.c:2932 udp_sendmsg+0x13c3/0x15d0 net/ipv4/udp.c:1450 inet_sendmsg+0xac/0xd0 net/ipv4/af_inet.c:859 sock_sendmsg_nosec net/socket.c:727 [inline] __sock_sendmsg net/socket.c:742 [inline] ____sys_sendmsg+0x53a/0x600 net/socket.c:2592 ___sys_sendmsg+0x195/0x1e0 net/socket.c:2646 __sys_sendmmsg+0x185/0x320 net/socket.c:2735 __do_sys_sendmmsg net/socket.c:2762 [inline] __se_sys_sendmmsg net/socket.c:2759 [inline] __x64_sys_sendmmsg+0x57/0x70 net/socket.c:2759 x64_sys_call+0x1e28/0x3000 arch/x86/include/generated/asm/syscalls_64.h:308 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xc0/0x2a0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f value changed: 0x00 -> 0x01 Reported by Kernel Concurrency Sanitizer on: CPU: 1 UID: 0 PID: 4168 Comm: syz.4.206 Not tainted syzkaller #0 PREEMPT(voluntary) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 ==================================================================
| Time | Kernel | Commit | Syzkaller | Config | Log | Report | Syz repro | C repro | VM info | Assets (help?) | Manager | Title |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026/01/27 01:56 | upstream | fcb70a56f4d8 | efb3e894 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-upstream-kcsan-gce | KCSAN: data-race in fib_table_lookup / fib_table_lookup |