syzbot


KMSAN: uninit-value in batadv_interface_tx

Status: fixed on 2019/03/06 07:43
Reported-by: syzbot+@syzkaller.appspotmail.com
Fix commit: 4ffcbfac6064 batman-adv: fix uninit-value in batadv_interface_tx()
First crash: 1324d, last: 1255d
similar bugs (1):
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream KMSAN: uninit-value in batadv_interface_tx (2) 19 748d 924d 0/23 auto-closed as invalid on 2020/11/22 02:35

Sample crash report:
IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready
IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready
IPv6: ADDRCONF(NETDEV_UP): vxcan1: link is not ready
8021q: adding VLAN 0 to HW filter on device batadv0
==================================================================
BUG: KMSAN: uninit-value in batadv_interface_tx+0x908/0x1e40 net/batman-adv/soft-interface.c:231
CPU: 0 PID: 10006 Comm: syz-executor469 Not tainted 4.20.0-rc7+ #5
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x173/0x1d0 lib/dump_stack.c:113
 kmsan_report+0x12e/0x2a0 mm/kmsan/kmsan.c:613
 __msan_warning+0x82/0xf0 mm/kmsan/kmsan_instr.c:313
 batadv_interface_tx+0x908/0x1e40 net/batman-adv/soft-interface.c:231
 __netdev_start_xmit include/linux/netdevice.h:4356 [inline]
 netdev_start_xmit include/linux/netdevice.h:4365 [inline]
 xmit_one net/core/dev.c:3257 [inline]
 dev_hard_start_xmit+0x607/0xc40 net/core/dev.c:3273
 __dev_queue_xmit+0x2e42/0x3bc0 net/core/dev.c:3843
 dev_queue_xmit+0x4b/0x60 net/core/dev.c:3876
 packet_snd net/packet/af_packet.c:2928 [inline]
 packet_sendmsg+0x8306/0x8f30 net/packet/af_packet.c:2953
 sock_sendmsg_nosec net/socket.c:621 [inline]
 sock_sendmsg net/socket.c:631 [inline]
 __sys_sendto+0x8c4/0xac0 net/socket.c:1788
 __do_sys_sendto net/socket.c:1800 [inline]
 __se_sys_sendto+0x107/0x130 net/socket.c:1796
 __x64_sys_sendto+0x6e/0x90 net/socket.c:1796
 do_syscall_64+0xbc/0xf0 arch/x86/entry/common.c:291
 entry_SYSCALL_64_after_hwframe+0x63/0xe7
RIP: 0033:0x441889
Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 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 0f 83 bb 10 fc ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007ffdda6fd468 EFLAGS: 00000216 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 0000000000441889
RDX: 000000000000000e RSI: 00000000200000c0 RDI: 0000000000000003
RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000216 R12: 00007ffdda6fd4c0
R13: 00007ffdda6fd4b0 R14: 0000000000000000 R15: 0000000000000000

Uninit was created at:
 kmsan_save_stack_with_flags mm/kmsan/kmsan.c:204 [inline]
 kmsan_internal_poison_shadow+0x92/0x150 mm/kmsan/kmsan.c:158
 kmsan_kmalloc+0xa6/0x130 mm/kmsan/kmsan_hooks.c:176
 kmsan_slab_alloc+0xe/0x10 mm/kmsan/kmsan_hooks.c:185
 slab_post_alloc_hook mm/slab.h:446 [inline]
 slab_alloc_node mm/slub.c:2759 [inline]
 __kmalloc_node_track_caller+0xe18/0x1030 mm/slub.c:4383
 __kmalloc_reserve net/core/skbuff.c:137 [inline]
 __alloc_skb+0x309/0xa20 net/core/skbuff.c:205
 alloc_skb include/linux/skbuff.h:998 [inline]
 alloc_skb_with_frags+0x1c7/0xac0 net/core/skbuff.c:5220
 sock_alloc_send_pskb+0xafd/0x10e0 net/core/sock.c:2083
 packet_alloc_skb net/packet/af_packet.c:2781 [inline]
 packet_snd net/packet/af_packet.c:2872 [inline]
 packet_sendmsg+0x661a/0x8f30 net/packet/af_packet.c:2953
 sock_sendmsg_nosec net/socket.c:621 [inline]
 sock_sendmsg net/socket.c:631 [inline]
 __sys_sendto+0x8c4/0xac0 net/socket.c:1788
 __do_sys_sendto net/socket.c:1800 [inline]
 __se_sys_sendto+0x107/0x130 net/socket.c:1796
 __x64_sys_sendto+0x6e/0x90 net/socket.c:1796
 do_syscall_64+0xbc/0xf0 arch/x86/entry/common.c:291
 entry_SYSCALL_64_after_hwframe+0x63/0xe7
==================================================================

Crashes (98):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci-upstream-kmsan-gce 2019/01/10 06:02 https://github.com/google/kmsan.git master a6846a32c96d 45c0c1b1 .config log report syz C
ci-upstream-kmsan-gce 2019/03/06 01:16 https://github.com/google/kmsan.git master 6c55aa96dcda 16559f86 .config log report
ci-upstream-kmsan-gce 2019/03/05 14:57 https://github.com/google/kmsan.git master 6c55aa96dcda bb91cf81 .config log report
ci-upstream-kmsan-gce 2019/03/05 05:04 https://github.com/google/kmsan.git master fa1981bee40f 7c693b52 .config log report
ci-upstream-kmsan-gce 2019/03/05 02:57 https://github.com/google/kmsan.git master fa1981bee40f 7c693b52 .config log report
ci-upstream-kmsan-gce 2019/03/04 17:26 https://github.com/google/kmsan.git master fa1981bee40f 7c693b52 .config log report
ci-upstream-kmsan-gce 2019/03/04 11:16 https://github.com/google/kmsan.git master fa1981bee40f 7c693b52 .config log report
ci-upstream-kmsan-gce 2019/03/04 04:33 https://github.com/google/kmsan.git master fa1981bee40f 1c0e457a .config log report
ci-upstream-kmsan-gce 2019/03/03 05:12 https://github.com/google/kmsan.git master fa1981bee40f 1c0e457a .config log report
ci-upstream-kmsan-gce 2019/03/02 23:35 https://github.com/google/kmsan.git master fa1981bee40f 1c0e457a .config log report
ci-upstream-kmsan-gce 2019/03/02 03:46 https://github.com/google/kmsan.git master fa1981bee40f 68d9e495 .config log report
ci-upstream-kmsan-gce 2019/03/01 03:47 https://github.com/google/kmsan.git master fa1981bee40f 09aeeba4 .config log report
ci-upstream-kmsan-gce 2019/03/01 02:45 https://github.com/google/kmsan.git master fa1981bee40f 09aeeba4 .config log report
ci-upstream-kmsan-gce 2019/02/28 07:05 https://github.com/google/kmsan.git master fa1981bee40f 34ec456b .config log report
ci-upstream-kmsan-gce 2019/02/27 08:11 https://github.com/google/kmsan.git master fa1981bee40f f2468c12 .config log report
ci-upstream-kmsan-gce 2019/02/27 05:13 https://github.com/google/kmsan.git master fa1981bee40f f2468c12 .config log report
ci-upstream-kmsan-gce 2019/02/26 22:41 https://github.com/google/kmsan.git master fa1981bee40f f2468c12 .config log report
ci-upstream-kmsan-gce 2019/02/22 14:11 https://github.com/google/kmsan.git master fa1981bee40f 6a5fcca4 .config log report
ci-upstream-kmsan-gce 2019/02/22 12:08 https://github.com/google/kmsan.git master fa1981bee40f 6a5fcca4 .config log report
ci-upstream-kmsan-gce 2019/02/22 09:40 https://github.com/google/kmsan.git master fa1981bee40f 7ff74a98 .config log report
ci-upstream-kmsan-gce 2019/02/21 21:58 https://github.com/google/kmsan.git master fa1981bee40f 7ff74a98 .config log report
ci-upstream-kmsan-gce 2019/02/20 11:47 https://github.com/google/kmsan.git master fa1981bee40f c95f0707 .config log report
ci-upstream-kmsan-gce 2019/02/19 11:07 https://github.com/google/kmsan.git master fa1981bee40f 59f36113 .config log report
ci-upstream-kmsan-gce 2019/02/18 14:07 https://github.com/google/kmsan.git master fa1981bee40f 59f36113 .config log report
ci-upstream-kmsan-gce 2019/02/18 06:30 https://github.com/google/kmsan.git master fa1981bee40f 59f36113 .config log report
ci-upstream-kmsan-gce 2019/02/17 11:54 https://github.com/google/kmsan.git master fa1981bee40f f42dee6d .config log report
ci-upstream-kmsan-gce 2019/02/17 09:35 https://github.com/google/kmsan.git master fa1981bee40f f42dee6d .config log report
ci-upstream-kmsan-gce 2019/02/17 03:17 https://github.com/google/kmsan.git master fa1981bee40f f42dee6d .config log report
ci-upstream-kmsan-gce 2019/02/17 00:39 https://github.com/google/kmsan.git master fa1981bee40f f42dee6d .config log report
ci-upstream-kmsan-gce 2019/02/16 16:42 https://github.com/google/kmsan.git master fa1981bee40f f42dee6d .config log report
ci-upstream-kmsan-gce 2019/02/15 23:46 https://github.com/google/kmsan.git master fa1981bee40f f42dee6d .config log report
ci-upstream-kmsan-gce 2019/02/15 14:33 https://github.com/google/kmsan.git master fa1981bee40f f6f233c0 .config log report
ci-upstream-kmsan-gce 2019/02/14 18:05 https://github.com/google/kmsan.git master fa1981bee40f 76dd003f .config log report
ci-upstream-kmsan-gce 2019/02/13 21:20 https://github.com/google/kmsan.git master fa1981bee40f 0a49c954 .config log report
ci-upstream-kmsan-gce 2019/02/12 22:45 https://github.com/google/kmsan.git master fa1981bee40f 6ecc6d0f .config log report
ci-upstream-kmsan-gce 2019/02/10 14:27 https://github.com/google/kmsan.git master fa1981bee40f b4f792e4 .config log report
ci-upstream-kmsan-gce 2019/02/10 11:27 https://github.com/google/kmsan.git master fa1981bee40f b4f792e4 .config log report
ci-upstream-kmsan-gce 2019/02/10 00:58 https://github.com/google/kmsan.git master fa1981bee40f d75f7686 .config log report
ci-upstream-kmsan-gce 2019/02/09 20:56 https://github.com/google/kmsan.git master fa1981bee40f d75f7686 .config log report
ci-upstream-kmsan-gce 2019/02/08 21:26 https://github.com/google/kmsan.git master fa1981bee40f fa6c7b70 .config log report
ci-upstream-kmsan-gce 2019/02/07 18:46 https://github.com/google/kmsan.git master fa1981bee40f aa4feb03 .config log report
ci-upstream-kmsan-gce 2019/02/05 06:29 https://github.com/google/kmsan.git master fa1981bee40f d672172c .config log report
ci-upstream-kmsan-gce 2019/02/04 15:58 https://github.com/google/kmsan.git master fa1981bee40f d672172c .config log report
ci-upstream-kmsan-gce 2019/02/04 00:11 https://github.com/google/kmsan.git master fa1981bee40f c198d5dd .config log report
ci-upstream-kmsan-gce 2019/02/03 15:59 https://github.com/google/kmsan.git master fa1981bee40f c198d5dd .config log report
ci-upstream-kmsan-gce 2019/02/03 06:28 https://github.com/google/kmsan.git master fa1981bee40f c198d5dd .config log report
ci-upstream-kmsan-gce 2019/02/02 20:32 https://github.com/google/kmsan.git master fa1981bee40f c198d5dd .config log report
ci-upstream-kmsan-gce 2019/02/02 14:19 https://github.com/google/kmsan.git master fa1981bee40f c198d5dd .config log report
ci-upstream-kmsan-gce 2019/02/02 02:05 https://github.com/google/kmsan.git master fa1981bee40f 564f9a4f .config log report
ci-upstream-kmsan-gce 2019/01/07 03:29 https://github.com/google/kmsan.git master 11587f6ee534 ee332608 .config log report
ci-upstream-kmsan-gce 2019/01/07 03:27 https://github.com/google/kmsan.git master 11587f6ee534 ee332608 .config log report
ci-upstream-kmsan-gce 2019/01/07 03:22 https://github.com/google/kmsan.git master 11587f6ee534 ee332608 .config log report
ci-upstream-kmsan-gce 2019/01/06 19:43 https://github.com/google/kmsan.git master 11587f6ee534 94f8adb5 .config log report
ci-upstream-kmsan-gce 2018/12/27 14:48 https://github.com/google/kmsan.git master 79fc24ff6184 43cf01dd .config log report
ci-upstream-kmsan-gce 2018/12/26 23:44 https://github.com/google/kmsan.git master 79fc24ff6184 e747ec98 .config log report
ci-upstream-kmsan-gce 2018/12/26 23:44 https://github.com/google/kmsan.git master 79fc24ff6184 e747ec98 .config log report