================================================================== BUG: KCSAN: data-race in complete_signal / do_group_exit read to 0xffff8880800cf260 of 4 bytes by task 4801 on cpu 0: do_group_exit+0xa2/0x1c0 kernel/exit.c:879 __do_sys_exit_group kernel/exit.c:906 [inline] __se_sys_exit_group kernel/exit.c:904 [inline] __x64_sys_exit_group+0x2e/0x30 kernel/exit.c:904 do_syscall_64+0xcc/0x3a0 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x44/0xa9 write to 0xffff8880800cf260 of 4 bytes by task 4807 on cpu 1: complete_signal+0x545/0x5e0 kernel/signal.c:1040 __send_signal+0x5ea/0x870 kernel/signal.c:1175 send_signal+0x224/0x2b0 kernel/signal.c:1236 do_send_sig_info+0x5f/0xc0 kernel/signal.c:1285 send_sig_info kernel/signal.c:1604 [inline] send_sig+0x5f/0x80 kernel/signal.c:1614 pipe_write+0xbb4/0xca0 fs/pipe.c:469 call_write_iter include/linux/fs.h:1902 [inline] new_sync_write+0x388/0x4a0 fs/read_write.c:483 __vfs_write+0xb1/0xc0 fs/read_write.c:496 vfs_write fs/read_write.c:558 [inline] vfs_write+0x18a/0x390 fs/read_write.c:542 ksys_write+0x17b/0x1b0 fs/read_write.c:611 __do_sys_write fs/read_write.c:623 [inline] __se_sys_write fs/read_write.c:620 [inline] __x64_sys_write+0x4c/0x60 fs/read_write.c:620 do_syscall_64+0xcc/0x3a0 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 4807 Comm: syz-executor.0 Not tainted 5.5.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================