KCSAN: data-race in ksys_read / ksys

Kernel	Title	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
upstream	KCSAN: data-race in ksys_read / ksys_read fs				2	769d	772d	0/26	auto-closed as invalid on 2022/04/27 10:35

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BUG: KCSAN: data-race in ksys_read / ksys_read

read to 0xffff888150168c40 of 8 bytes by task 32624 on cpu 1:
 ksys_read+0xad/0x1a0 fs/read_write.c:616
 __do_sys_read fs/read_write.c:629 [inline]
 __se_sys_read fs/read_write.c:627 [inline]
 __x64_sys_read+0x42/0x50 fs/read_write.c:627
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0x59/0x120 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x63/0x6b

write to 0xffff888150168c40 of 8 bytes by task 32625 on cpu 0:
 ksys_read+0x11e/0x1a0 fs/read_write.c:621
 __do_sys_read fs/read_write.c:629 [inline]
 __se_sys_read fs/read_write.c:627 [inline]
 __x64_sys_read+0x42/0x50 fs/read_write.c:627
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0x59/0x120 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x63/0x6b

value changed: 0x0000000000000038 -> 0x0000000000000058

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 32625 Comm: syz-executor.3 Not tainted 6.7.0-syzkaller-13004-g4fbbed787267 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
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