syzbot


KCSAN: data-race in rds_sendmsg / rds_sendmsg

Status: auto-obsoleted due to no activity on 2024/01/11 06:36
Subsystems: rds
[Documentation on labels]
Reported-by: syzbot+00563755980a79a575f6@syzkaller.appspotmail.com
First crash: 138d, last: 82d
Discussions (3)
Title Replies (including bot) Last reply
[syzbot] Monthly rds report (Nov 2023) 1 (2) 2023/12/11 19:24
[syzbot] Monthly rds report (Oct 2023) 0 (1) 2023/10/19 13:02
[syzbot] [rds?] KCSAN: data-race in rds_sendmsg / rds_sendmsg 0 (1) 2023/10/18 09:15

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

write to 0xffff888102791e78 of 8 bytes by task 2625 on cpu 1:
 rds_sendmsg+0xbc6/0x1410 net/rds/send.c:1304
 sock_sendmsg_nosec net/socket.c:730 [inline]
 __sock_sendmsg net/socket.c:745 [inline]
 __sys_sendto+0x257/0x310 net/socket.c:2190
 __do_sys_sendto net/socket.c:2202 [inline]
 __se_sys_sendto net/socket.c:2198 [inline]
 __x64_sys_sendto+0x78/0x90 net/socket.c:2198
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x44/0x110 arch/x86/entry/common.c:82
 entry_SYSCALL_64_after_hwframe+0x63/0x6b

read to 0xffff888102791e78 of 8 bytes by task 2624 on cpu 0:
 rds_sendmsg+0xa51/0x1410 net/rds/send.c:1291
 sock_sendmsg_nosec net/socket.c:730 [inline]
 __sock_sendmsg net/socket.c:745 [inline]
 __sys_sendto+0x257/0x310 net/socket.c:2190
 __do_sys_sendto net/socket.c:2202 [inline]
 __se_sys_sendto net/socket.c:2198 [inline]
 __x64_sys_sendto+0x78/0x90 net/socket.c:2198
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x44/0x110 arch/x86/entry/common.c:82
 entry_SYSCALL_64_after_hwframe+0x63/0x6b

value changed: 0xffff88813c583508 -> 0xffff88813c5835c0

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 2624 Comm: syz-executor.1 Not tainted 6.7.0-rc4-syzkaller-00009-gbee0e7762ad2 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023
==================================================================

Crashes (4):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2023/12/07 06:35 upstream bee0e7762ad2 e3299f55 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in rds_sendmsg / rds_sendmsg
2023/11/11 10:14 upstream ac347a0655db d80eec66 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in rds_sendmsg / rds_sendmsg
2023/10/31 06:49 upstream 14ab6d425e80 b5729d82 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in rds_sendmsg / rds_sendmsg
2023/10/12 10:53 upstream 401644852d0b 1b231e3c .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in rds_sendmsg / rds_sendmsg
* Struck through repros no longer work on HEAD.