syzbot


KMSAN: uninit-value in __inet_bind

Status: upstream: reported C repro on 2026/02/14 10:14
Subsystems: net
[Documentation on labels]
Reported-by: syzbot+aae646f09192f72a68dc@syzkaller.appspotmail.com
First crash: 6d16h, last: 2h12m
Discussions (3)
Title Replies (including bot) Last reply
[PATCH net v2] rds: tcp: fix uninit-value in __inet_bind 3 (3) 2026/02/18 04:19
[PATCH net] rds: tcp: fix uninit-value in __inet_bind 3 (3) 2026/02/16 20:49
[syzbot] [net?] KMSAN: uninit-value in __inet_bind 0 (2) 2026/02/15 06:09
Last patch testing requests (1)
Created Duration User Patch Repo Result
2026/02/15 06:09 28m tabreztalks@gmail.com patch git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git main OK log

Sample crash report:
wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50
wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50
wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50
=====================================================
BUG: KMSAN: uninit-value in __inet_bind+0x8a4/0xf20 net/ipv4/af_inet.c:511
 __inet_bind+0x8a4/0xf20 net/ipv4/af_inet.c:511
 inet_bind_sk net/ipv4/af_inet.c:464 [inline]
 inet_bind+0x12c/0x1a0 net/ipv4/af_inet.c:469
 kernel_bind+0xd6/0x130 net/socket.c:3554
 rds_tcp_conn_path_connect+0x952/0xff0 net/rds/tcp_connect.c:175
 rds_connect_worker+0x353/0x4d0 net/rds/threads.c:176
 process_one_work kernel/workqueue.c:3275 [inline]
 process_scheduled_works+0xae7/0x1d60 kernel/workqueue.c:3358
 worker_thread+0xede/0x1580 kernel/workqueue.c:3439
 kthread+0x53f/0x600 kernel/kthread.c:467
 ret_from_fork+0x20f/0x910 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

Uninit was stored to memory at:
 kernel_bind+0x92/0x130 net/socket.c:3552
 rds_tcp_conn_path_connect+0x952/0xff0 net/rds/tcp_connect.c:175
 rds_connect_worker+0x353/0x4d0 net/rds/threads.c:176
 process_one_work kernel/workqueue.c:3275 [inline]
 process_scheduled_works+0xae7/0x1d60 kernel/workqueue.c:3358
 worker_thread+0xede/0x1580 kernel/workqueue.c:3439
 kthread+0x53f/0x600 kernel/kthread.c:467
 ret_from_fork+0x20f/0x910 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

Uninit was stored to memory at:
 rds_tcp_conn_path_connect+0xaf8/0xff0 net/rds/tcp_connect.c:174
 rds_connect_worker+0x353/0x4d0 net/rds/threads.c:176
 process_one_work kernel/workqueue.c:3275 [inline]
 process_scheduled_works+0xae7/0x1d60 kernel/workqueue.c:3358
 worker_thread+0xede/0x1580 kernel/workqueue.c:3439
 kthread+0x53f/0x600 kernel/kthread.c:467
 ret_from_fork+0x20f/0x910 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

Uninit was created at:
 slab_post_alloc_hook mm/slub.c:4466 [inline]
 slab_alloc_node mm/slub.c:4788 [inline]
 kmem_cache_alloc_noprof+0x373/0x1200 mm/slub.c:4795
 rds_tcp_conn_alloc+0x7b/0xbb0 net/rds/tcp.c:376
 __rds_conn_create+0x267f/0x34e0 net/rds/connection.c:283
 rds_conn_create_outgoing+0x5d/0x80 net/rds/connection.c:377
 rds_sendmsg+0x2684/0x4d70 net/rds/send.c:1321
 sock_sendmsg_nosec net/socket.c:727 [inline]
 __sock_sendmsg net/socket.c:742 [inline]
 ____sys_sendmsg+0xfe7/0x1080 net/socket.c:2592
 ___sys_sendmsg+0x271/0x3b0 net/socket.c:2646
 __sys_sendmsg net/socket.c:2678 [inline]
 __do_sys_sendmsg net/socket.c:2683 [inline]
 __se_sys_sendmsg net/socket.c:2681 [inline]
 __x64_sys_sendmsg+0x211/0x3e0 net/socket.c:2681
 x64_sys_call+0x1e20/0x3ea0 arch/x86/include/generated/asm/syscalls_64.h:47
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x134/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

CPU: 1 UID: 0 PID: 1096 Comm: kworker/u8:7 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
Workqueue: krds_cp_wq#0/0 rds_connect_worker
=====================================================

Crashes (382):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/02/14 09:39 upstream cd7a5651db26 1e62d198 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in __inet_bind
2026/02/19 11:52 upstream 956b9cbd7f15 746545b8 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in __inet_bind
2026/02/19 11:46 upstream 956b9cbd7f15 746545b8 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in __inet_bind
2026/02/19 02:27 upstream 2961f841b025 77d4d919 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in __inet_bind
2026/02/18 22:30 upstream 2961f841b025 77d4d919 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in __inet_bind
2026/02/18 20:02 upstream 2961f841b025 77d4d919 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in __inet_bind
2026/02/18 19:53 upstream 2961f841b025 77d4d919 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in __inet_bind
2026/02/18 15:21 upstream 2961f841b025 77d4d919 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in __inet_bind
2026/02/18 08:32 upstream d295082ea672 39751c21 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in __inet_bind
2026/02/18 08:17 upstream d295082ea672 39751c21 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in __inet_bind
2026/02/18 06:41 upstream d295082ea672 39751c21 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in __inet_bind
2026/02/18 05:15 upstream d295082ea672 39751c21 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in __inet_bind
2026/02/18 02:59 upstream d295082ea672 39751c21 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in __inet_bind
2026/02/17 15:51 upstream 970296997869 e439b951 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in __inet_bind
2026/02/16 23:37 upstream 0f2acd3148e0 5d52cba5 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in __inet_bind
2026/02/16 14:06 upstream 0f2acd3148e0 1e62d198 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in __inet_bind
2026/02/16 14:06 upstream 0f2acd3148e0 1e62d198 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in __inet_bind
2026/02/16 07:35 upstream bb7a3fc2c976 1e62d198 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in __inet_bind
2026/02/16 06:26 upstream bb7a3fc2c976 1e62d198 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in __inet_bind
2026/02/16 05:49 upstream bb7a3fc2c976 1e62d198 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in __inet_bind
2026/02/16 04:00 upstream bb7a3fc2c976 1e62d198 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in __inet_bind
2026/02/16 01:55 upstream bb7a3fc2c976 1e62d198 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in __inet_bind
2026/02/15 17:17 upstream ca4ee40bf13d 1e62d198 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in __inet_bind
2026/02/15 16:06 upstream ca4ee40bf13d 1e62d198 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in __inet_bind
2026/02/15 15:06 upstream ca4ee40bf13d 1e62d198 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in __inet_bind
2026/02/15 09:58 upstream ca4ee40bf13d 1e62d198 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in __inet_bind
2026/02/19 00:46 upstream 2961f841b025 77d4d919 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: uninit-value in __inet_bind
2026/02/18 22:58 upstream 2961f841b025 77d4d919 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: uninit-value in __inet_bind
2026/02/18 21:27 upstream 2961f841b025 77d4d919 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: uninit-value in __inet_bind
2026/02/18 09:48 upstream d295082ea672 39751c21 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: uninit-value in __inet_bind
2026/02/17 19:30 upstream 970296997869 39751c21 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: uninit-value in __inet_bind
2026/02/17 12:21 upstream 970296997869 e439b951 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: uninit-value in __inet_bind
2026/02/17 02:11 upstream 0f2acd3148e0 5d52cba5 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: uninit-value in __inet_bind
2026/02/16 15:19 upstream 26a4cfaff82a 1e62d198 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: uninit-value in __inet_bind
2026/02/16 12:32 upstream 26a4cfaff82a 1e62d198 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: uninit-value in __inet_bind
2026/02/16 11:12 upstream 26a4cfaff82a 1e62d198 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: uninit-value in __inet_bind
2026/02/16 09:46 upstream 26a4cfaff82a 1e62d198 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: uninit-value in __inet_bind
2026/02/16 08:39 upstream 26a4cfaff82a 1e62d198 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: uninit-value in __inet_bind
2026/02/16 00:48 upstream ca4ee40bf13d 1e62d198 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: uninit-value in __inet_bind
2026/02/15 23:14 upstream ca4ee40bf13d 1e62d198 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: uninit-value in __inet_bind
2026/02/15 23:14 upstream ca4ee40bf13d 1e62d198 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: uninit-value in __inet_bind
2026/02/15 20:37 upstream ca4ee40bf13d 1e62d198 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: uninit-value in __inet_bind
2026/02/15 11:53 upstream 64275e9fda37 1e62d198 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: uninit-value in __inet_bind
2026/02/15 11:02 upstream 64275e9fda37 1e62d198 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: uninit-value in __inet_bind
* Struck through repros no longer work on HEAD.