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================================================================== BUG: KCSAN: data-race in dequeue_signal / ptrace_check_attach read-write to 0xffff888142dfd640 of 8 bytes by task 3757 on cpu 1: dequeue_signal+0x3ca/0x420 kernel/signal.c:694 get_signal+0x366/0x1090 kernel/signal.c:2772 arch_do_signal_or_restart+0x95/0x4b0 arch/x86/kernel/signal.c:309 exit_to_user_mode_loop+0x6f/0xe0 kernel/entry/common.c:168 exit_to_user_mode_prepare+0x6c/0xb0 kernel/entry/common.c:204 __syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline] syscall_exit_to_user_mode+0x26/0x140 kernel/entry/common.c:296 do_syscall_64+0x4d/0xc0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x63/0xcd read to 0xffff888142dfd640 of 8 bytes by task 3719 on cpu 0: ptrace_freeze_traced kernel/ptrace.c:200 [inline] ptrace_check_attach+0x7e/0x280 kernel/ptrace.c:267 __do_sys_ptrace kernel/ptrace.c:1300 [inline] __se_sys_ptrace+0xd4/0x2a0 kernel/ptrace.c:1278 __x64_sys_ptrace+0x55/0x60 kernel/ptrace.c:1278 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd value changed: 0x0000000000000000 -> 0x0000000008010000 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 3719 Comm: syz-executor.1 Not tainted 6.5.0-syzkaller-11075-g92901222f83d #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023 ==================================================================
Time | Kernel | Commit | Syzkaller | Config | Log | Report | Syz repro | C repro | VM info | Assets (help?) | Manager | Title |
---|---|---|---|---|---|---|---|---|---|---|---|---|
2023/09/03 11:48 | upstream | 92901222f83d | 696ea0d2 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-upstream-kcsan-gce | KCSAN: data-race in dequeue_signal / ptrace_check_attach | ||
2023/08/03 12:16 | upstream | ec351c8f2e62 | 39a91c18 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-upstream-kcsan-gce | KCSAN: data-race in dequeue_signal / ptrace_check_attach | ||
2023/07/02 15:56 | upstream | 995b406c7e97 | bfc47836 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-upstream-kcsan-gce | KCSAN: data-race in dequeue_signal / ptrace_check_attach |