syzbot


KCSAN: data-race in data_alloc / prb_reserve

Status: moderation: reported on 2021/03/25 21:28
Subsystems: ext4
[Documentation on labels]
Reported-by: syzbot+3ef70d22840405b8403f@syzkaller.appspotmail.com
First crash: 1187d, last: 2d02h

Sample crash report:
==================================================================
BUG: KCSAN: data-race in data_alloc / prb_reserve

write to 0xffffffff8608c3f8 of 8 bytes by task 23694 on cpu 1:
 data_alloc+0x291/0x2c0 kernel/printk/printk_ringbuffer.c:1096
 prb_reserve+0x85e/0xb60 kernel/printk/printk_ringbuffer.c:1669
 vprintk_store+0x53f/0x810 kernel/printk/printk.c:2263
 vprintk_emit+0x10c/0x5e0 kernel/printk/printk.c:2323
 vprintk_default+0x26/0x30 kernel/printk/printk.c:2357
 vprintk+0x75/0x80 kernel/printk/printk_safe.c:45
 _printk+0x7a/0xa0 kernel/printk/printk.c:2367
 batadv_check_known_mac_addr+0x147/0x180 net/batman-adv/hard-interface.c:526
 batadv_hard_if_event+0x4b0/0x1000 net/batman-adv/hard-interface.c:998
 notifier_call_chain kernel/notifier.c:93 [inline]
 raw_notifier_call_chain+0x6f/0x1d0 kernel/notifier.c:461
 call_netdevice_notifiers_info+0xae/0x100 net/core/dev.c:1950
 call_netdevice_notifiers_extack net/core/dev.c:1988 [inline]
 call_netdevice_notifiers net/core/dev.c:2002 [inline]
 dev_set_mac_address+0x1ff/0x260 net/core/dev.c:8946
 dev_set_mac_address_user+0x31/0x50 net/core/dev.c:8960
 do_setlink+0x510/0x2480 net/core/rtnetlink.c:2839
 __rtnl_newlink net/core/rtnetlink.c:3680 [inline]
 rtnl_newlink+0x11a1/0x1690 net/core/rtnetlink.c:3727
 rtnetlink_rcv_msg+0x82e/0x8e0 net/core/rtnetlink.c:6595
 netlink_rcv_skb+0x12c/0x230 net/netlink/af_netlink.c:2559
 rtnetlink_rcv+0x1c/0x30 net/core/rtnetlink.c:6613
 netlink_unicast_kernel net/netlink/af_netlink.c:1335 [inline]
 netlink_unicast+0x58d/0x660 net/netlink/af_netlink.c:1361
 netlink_sendmsg+0x5d3/0x6e0 net/netlink/af_netlink.c:1905
 sock_sendmsg_nosec net/socket.c:730 [inline]
 __sock_sendmsg+0x140/0x180 net/socket.c:745
 __sys_sendto+0x1e5/0x260 net/socket.c:2191
 __do_sys_sendto net/socket.c:2203 [inline]
 __se_sys_sendto net/socket.c:2199 [inline]
 __x64_sys_sendto+0x78/0x90 net/socket.c:2199
 do_syscall_64+0xd3/0x1d0
 entry_SYSCALL_64_after_hwframe+0x6d/0x75

read to 0xffffffff8608c3f8 of 8 bytes by task 24665 on cpu 0:
 desc_read kernel/printk/printk_ringbuffer.c:482 [inline]
 desc_push_tail kernel/printk/printk_ringbuffer.c:778 [inline]
 desc_reserve kernel/printk/printk_ringbuffer.c:924 [inline]
 prb_reserve+0x235/0xb60 kernel/printk/printk_ringbuffer.c:1619
 vprintk_store+0x53f/0x810 kernel/printk/printk.c:2263
 vprintk_emit+0x10c/0x5e0 kernel/printk/printk.c:2323
 vprintk_default+0x26/0x30 kernel/printk/printk.c:2357
 vprintk+0x75/0x80 kernel/printk/printk_safe.c:45
 _printk+0x7a/0xa0 kernel/printk/printk.c:2367
 __nla_validate_parse+0x1769/0x1ce0 lib/nlattr.c:647
 __nla_parse+0x40/0x60 lib/nlattr.c:732
 nla_parse_deprecated include/net/netlink.h:703 [inline]
 nfnetlink_rcv_batch net/netfilter/nfnetlink.c:512 [inline]
 nfnetlink_rcv_skb_batch net/netfilter/nfnetlink.c:639 [inline]
 nfnetlink_rcv+0x9f4/0x13e0 net/netfilter/nfnetlink.c:657
 netlink_unicast_kernel net/netlink/af_netlink.c:1335 [inline]
 netlink_unicast+0x58d/0x660 net/netlink/af_netlink.c:1361
 netlink_sendmsg+0x5d3/0x6e0 net/netlink/af_netlink.c:1905
 sock_sendmsg_nosec net/socket.c:730 [inline]
 __sock_sendmsg+0x140/0x180 net/socket.c:745
 ____sys_sendmsg+0x312/0x410 net/socket.c:2584
 ___sys_sendmsg net/socket.c:2638 [inline]
 __sys_sendmsg+0x1e9/0x280 net/socket.c:2667
 __do_sys_sendmsg net/socket.c:2676 [inline]
 __se_sys_sendmsg net/socket.c:2674 [inline]
 __x64_sys_sendmsg+0x46/0x50 net/socket.c:2674
 do_syscall_64+0xd3/0x1d0
 entry_SYSCALL_64_after_hwframe+0x6d/0x75

value changed: 0x00000000002fb708 -> 0x00000000003b2290

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 24665 Comm: syz-executor.3 Tainted: G        W          6.8.0-syzkaller-11136-g66a27abac311 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024
==================================================================
netlink: 48 bytes leftover after parsing attributes in process `syz-executor.3'.

Crashes (860):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/03/16 23:08 upstream 66a27abac311 d615901c .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in data_alloc / prb_reserve
2024/03/12 10:18 upstream 045395d86acd 6ee49f2e .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in data_alloc / prb_reserve
2024/03/11 02:59 upstream fa4b851b4ad6 6ee49f2e .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in data_alloc / prb_reserve
2024/03/10 10:52 upstream 005f6f34bd47 6ee49f2e .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in data_alloc / prb_reserve
2024/03/10 06:15 upstream 09e5c48fea17 6ee49f2e .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in data_alloc / prb_reserve
2024/03/09 06:34 upstream 10d48d70e82d 6ee49f2e .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in data_alloc / prb_reserve
2024/03/06 14:36 upstream 5847c9777c30 f39a7eed .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in data_alloc / prb_reserve
2024/03/06 09:10 upstream 29cd507cbec2 f39a7eed .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in data_alloc / prb_reserve
2024/03/05 08:09 upstream 90d35da658da 5fc53669 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in data_alloc / prb_reserve
2024/03/04 01:41 upstream 58c806d867bf 25905f5d .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in data_alloc / prb_reserve
2024/03/03 08:26 upstream 04b8076df253 25905f5d .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in data_alloc / prb_reserve
2024/03/02 12:06 upstream 17ba56605bfd 25905f5d .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in data_alloc / prb_reserve
2024/02/28 03:57 upstream cf1182944c7c d367cbe5 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in data_alloc / prb_reserve
2024/02/27 23:18 upstream 45ec2f5f6ed3 d367cbe5 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in data_alloc / prb_reserve
2024/02/26 18:14 upstream d206a76d7d27 da36a36b .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in data_alloc / prb_reserve
2024/02/26 01:37 upstream 70ff1fe626a1 8d446f15 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in data_alloc / prb_reserve
2024/02/23 20:51 upstream ffd2cb6b718e 8d446f15 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in data_alloc / prb_reserve
2024/02/21 07:52 upstream fca7526b7d89 3af7dd65 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in data_alloc / prb_reserve
2024/02/18 11:49 upstream c02197fc9076 578f7538 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in data_alloc / prb_reserve
2024/02/18 01:30 upstream ced590523156 578f7538 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in data_alloc / prb_reserve
2024/02/15 22:14 upstream 4f5e5092fdbf fd39cf6f .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in data_alloc / prb_reserve
2024/02/15 05:12 upstream 8d3dea210042 d9b1cdd5 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in data_alloc / prb_reserve
2024/02/14 20:09 upstream 7e90b5c295ec d9b1cdd5 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in data_alloc / prb_reserve
2024/02/13 10:33 upstream c664e16bb1ba 77b23aa1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in data_alloc / prb_reserve
2024/02/12 09:08 upstream 841c35169323 77b23aa1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in data_alloc / prb_reserve
2024/02/11 14:52 upstream 7521f258ea30 77b23aa1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in data_alloc / prb_reserve
2024/02/10 05:56 upstream e6f39a90de92 77b23aa1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in data_alloc / prb_reserve
2024/02/07 15:33 upstream 6d280f4d760e 6404acf9 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in data_alloc / prb_reserve
2024/02/02 19:14 upstream 021533194476 60bf9982 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in data_alloc / prb_reserve
2024/01/31 17:14 upstream 1bbb19b6eb1b 373b66cd .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in data_alloc / prb_reserve
2024/01/29 13:04 upstream 41bccc98fb79 991a98f4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in data_alloc / prb_reserve
2024/01/29 01:33 upstream 4854cf9c61d0 cc4a4020 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in data_alloc / prb_reserve
2024/01/28 00:27 upstream cd2286fc5775 cc4a4020 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in data_alloc / prb_reserve
2024/01/24 23:16 upstream 443b349019f2 1e153dc8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in data_alloc / prb_reserve
2024/01/24 18:46 upstream 615d30064886 1e153dc8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in data_alloc / prb_reserve
2024/01/22 18:29 upstream 6613476e225e 9bd8dcda .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in data_alloc / prb_reserve
2024/01/20 19:19 upstream 125514880ddd 9bd8dcda .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in data_alloc / prb_reserve
2024/01/19 17:53 upstream 9d1694dc91ce 9bd8dcda .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in data_alloc / prb_reserve
2024/01/19 11:18 upstream 86c4d58a99ab 21772ce4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in data_alloc / prb_reserve
2024/01/16 05:36 upstream 052d534373b7 2a7bcc7f .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in data_alloc / prb_reserve
2024/01/13 10:16 upstream 052d534373b7 551587c1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in data_alloc / prb_reserve
2024/01/10 20:39 upstream ab27740f7665 04815ef1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in data_alloc / prb_reserve
2024/01/09 06:59 upstream 5db8752c3b81 4c0fd4bb .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in data_alloc / prb_reserve
2024/01/08 03:58 upstream 0dd3ee311255 d0304e9c .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in data_alloc / prb_reserve
2024/01/06 00:44 upstream a4ab2706bb12 d0304e9c .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in data_alloc / prb_reserve
2024/01/02 00:15 upstream 610a9b8f49fb fb427a07 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in data_alloc / prb_reserve
2023/12/31 00:47 upstream 453f5db0619e fb427a07 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in data_alloc / prb_reserve
2023/12/30 03:49 upstream f016f7547aee fb427a07 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in data_alloc / prb_reserve
2023/12/29 23:53 upstream 8735c7c84d1b fb427a07 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in data_alloc / prb_reserve
2023/12/29 01:14 upstream 505e701c0b2c fb427a07 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in data_alloc / prb_reserve
2023/12/28 09:56 upstream f5837722ffec fb427a07 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in data_alloc / prb_reserve
2021/03/23 05:33 upstream 0d02ec6b3136 8092f30d .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in data_alloc / prb_reserve
2021/03/21 21:14 upstream 812da4d39463 4c9a64da .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in data_alloc / prb_reserve
2021/01/11 05:54 upstream 0653161f0fac 2c1f2513 .config console log report info ci2-upstream-kcsan-gce
2020/12/17 20:32 upstream accefff5b547 04201c06 .config console log report info ci2-upstream-kcsan-gce
* Struck through repros no longer work on HEAD.