syzbot


KCSAN: data-race in data_alloc / data_push_tail (2)

Status: moderation: reported on 2024/03/02 15:49
Subsystems: lvs block ext4
[Documentation on labels]
Reported-by: syzbot+0b6bbfde391a872ca112@syzkaller.appspotmail.com
First crash: 311d, last: 18d
Similar bugs (1)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream KCSAN: data-race in data_alloc / data_push_tail ext4 94 360d 823d 0/26 auto-obsoleted due to no activity on 2023/05/31 17:30

Sample crash report:
ip6t_REJECT: TCP_RESET illegal for non-tcp
ip6t_REJECT: TCP_RESET illegal for non-tcp
==================================================================
BUG: KCSAN: data-race in data_alloc / data_push_tail

write to 0xffffffff883a0bb8 of 8 bytes by task 10762 on cpu 1:
 data_alloc+0x216/0x2c0 kernel/printk/printk_ringbuffer.c:1082
 prb_reserve+0x85e/0xb60 kernel/printk/printk_ringbuffer.c:1669
 vprintk_store+0x53f/0x810 kernel/printk/printk.c:2269
 vprintk_emit+0x10c/0x5e0 kernel/printk/printk.c:2329
 vprintk_default+0x26/0x30 kernel/printk/printk.c:2363
 vprintk+0x75/0x80 kernel/printk/printk_safe.c:45
 _printk+0x7a/0xa0 kernel/printk/printk.c:2373
 ip_vs_est_calc_phase net/netfilter/ipvs/ip_vs_est.c:875 [inline]
 ip_vs_estimation_kthread+0x186c/0x1a20 net/netfilter/ipvs/ip_vs_est.c:191
 kthread+0x1d1/0x210 kernel/kthread.c:388
 ret_from_fork+0x4b/0x60 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:243

read to 0xffffffff883a0bb8 of 8 bytes by task 10765 on cpu 0:
 data_make_reusable kernel/printk/printk_ringbuffer.c:594 [inline]
 data_push_tail+0x102/0x430 kernel/printk/printk_ringbuffer.c:679
 data_alloc+0xbe/0x2c0 kernel/printk/printk_ringbuffer.c:1054
 prb_reserve+0x85e/0xb60 kernel/printk/printk_ringbuffer.c:1669
 vprintk_store+0x53f/0x810 kernel/printk/printk.c:2269
 vprintk_emit+0x10c/0x5e0 kernel/printk/printk.c:2329
 vprintk_default+0x26/0x30 kernel/printk/printk.c:2363
 vprintk+0x75/0x80 kernel/printk/printk_safe.c:45
 _printk+0x7a/0xa0 kernel/printk/printk.c:2373
 reject_tg6_check+0x173/0x180
 xt_check_target+0x266/0x480 net/netfilter/x_tables.c:1038
 check_target net/ipv6/netfilter/ip6_tables.c:528 [inline]
 find_check_entry net/ipv6/netfilter/ip6_tables.c:571 [inline]
 translate_table+0xcde/0x1040 net/ipv6/netfilter/ip6_tables.c:733
 do_replace net/ipv6/netfilter/ip6_tables.c:1150 [inline]
 do_ip6t_set_ctl+0x14bf/0x1800 net/ipv6/netfilter/ip6_tables.c:1636
 nf_setsockopt+0x195/0x1b0 net/netfilter/nf_sockopt.c:101
 ipv6_setsockopt+0x126/0x140 net/ipv6/ipv6_sockglue.c:999
 udpv6_setsockopt+0x95/0xb0 net/ipv6/udp.c:1692
 sock_common_setsockopt+0x64/0x80 net/core/sock.c:3727
 do_sock_setsockopt net/socket.c:2311 [inline]
 __sys_setsockopt+0x1d8/0x250 net/socket.c:2334
 __do_sys_setsockopt net/socket.c:2343 [inline]
 __se_sys_setsockopt net/socket.c:2340 [inline]
 __x64_sys_setsockopt+0x66/0x80 net/socket.c:2340
 do_syscall_64+0xd3/0x1d0
 entry_SYSCALL_64_after_hwframe+0x72/0x7a

value changed: 0x00000000fffff157 -> 0x00000000ffffff28

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 10765 Comm: syz-executor.1 Tainted: G        W          6.9.0-rc2-syzkaller-00040-gb1e6ec0a0fd0 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
==================================================================

Crashes (28):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/04/03 05:54 upstream b1e6ec0a0fd0 7925100d .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in data_alloc / data_push_tail
2024/03/08 04:58 upstream 3aaa8ce7a335 cf82cde1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in data_alloc / data_push_tail
2024/02/22 15:25 upstream 39133352cbed 345111b5 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in data_alloc / data_push_tail
2024/02/19 23:00 upstream b401b621758e 3af7dd65 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in data_alloc / data_push_tail
2024/02/06 23:50 upstream 99bd3cb0d12e 6404acf9 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in data_alloc / data_push_tail
2024/01/26 13:51 upstream ecb1b8288dc7 cc4a4020 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in data_alloc / data_push_tail
2024/01/05 01:43 upstream 5eff55d725a4 28c42cff .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in data_alloc / data_push_tail
2024/01/01 01:36 upstream 2639772a11c8 fb427a07 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in data_alloc / data_push_tail
2023/12/18 14:26 upstream ceb6a6f023fd 3222d10c .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in data_alloc / data_push_tail
2023/12/17 20:05 upstream 0e389834672c 3222d10c .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in data_alloc / data_push_tail
2023/11/28 17:06 upstream df60cee26a2e 9fe51b7c .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in data_alloc / data_push_tail
2023/11/26 08:21 upstream 090472ed9c92 5b429f39 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in data_alloc / data_push_tail
2023/11/09 18:40 upstream 6bc986ab839c 56230772 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in data_alloc / data_push_tail
2023/11/08 15:56 upstream 305230142ae0 b93f63e8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in data_alloc / data_push_tail
2023/10/19 18:29 upstream 7cf4bea77ab6 42e1d524 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in data_alloc / data_push_tail
2023/10/17 07:56 upstream 213f891525c2 342b9c55 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in data_alloc / data_push_tail
2023/10/09 05:31 upstream 94f6f0550c62 5e837c76 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in data_alloc / data_push_tail
2023/10/07 07:46 upstream 82714078aee4 5e837c76 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in data_alloc / data_push_tail
2023/10/04 13:12 upstream cbf3a2cb156a b7d7ff54 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in data_alloc / data_push_tail
2023/10/03 05:17 upstream ce36c8b14987 65faba36 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in data_alloc / data_push_tail
2023/09/28 22:36 upstream 9ed22ae6be81 d265efd8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in data_alloc / data_push_tail
2023/09/24 19:58 upstream 3aba70aed91f 0b6a67ac .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in data_alloc / data_push_tail
2023/08/28 15:59 upstream 2dde18cd1d8f 7ba13a15 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in data_alloc / data_push_tail
2023/07/30 16:57 upstream d31e3792919e 2a0d0f29 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in data_alloc / data_push_tail
2023/07/17 16:16 upstream fdf0eaf11452 20f8b3c2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in data_alloc / data_push_tail
2023/07/04 12:25 upstream 24be4d0b46bb 6e553898 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in data_alloc / data_push_tail
2023/06/17 11:35 upstream 1639fae5132b f3921d4d .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in data_alloc / data_push_tail
2023/06/15 07:23 upstream b6dad5178cea 76decb82 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in data_alloc / data_push_tail
* Struck through repros no longer work on HEAD.