Kernel | Title | Repro | Cause bisect | Fix bisect | Count | Last | Reported | Patched | Status |
---|---|---|---|---|---|---|---|---|---|
upstream | KCSAN: data-race in ep_insert / ep_poll (2) fs | 3 | 1445d | 1498d | 0/26 | auto-closed as invalid on 2020/06/18 13:53 |
syzbot |
sign-in | mailing list | source | docs |
🐞 Open [979] ≡ Subsystems 🐞 Fixed [5236] 🐞 Invalid [12499] ⬇ Missing Backports [83] 📈 Kernel Health 📈 Bug Lifetimes 📈 Fuzzing 📈 Crashes | 💬 Send us feedback |
Kernel | Title | Repro | Cause bisect | Fix bisect | Count | Last | Reported | Patched | Status |
---|---|---|---|---|---|---|---|---|---|
upstream | KCSAN: data-race in ep_insert / ep_poll (2) fs | 3 | 1445d | 1498d | 0/26 | auto-closed as invalid on 2020/06/18 13:53 |
================================================================== BUG: KCSAN: data-race in ep_insert / ep_poll write to 0xffff888123150f58 of 8 bytes by task 7477 on cpu 0: __list_add include/linux/list.h:63 [inline] __list_add include/linux/list.h:56 [inline] list_add_tail include/linux/list.h:93 [inline] ep_insert+0xb7d/0xcf0 fs/eventpoll.c:1576 __do_sys_epoll_ctl fs/eventpoll.c:2217 [inline] __se_sys_epoll_ctl fs/eventpoll.c:2103 [inline] __x64_sys_epoll_ctl+0x97e/0xa40 fs/eventpoll.c:2103 do_syscall_64+0xcc/0x370 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x44/0xa9 read to 0xffff888123150f58 of 8 bytes by task 7472 on cpu 1: list_empty_careful include/linux/list.h:287 [inline] ep_events_available fs/eventpoll.c:380 [inline] ep_poll+0x34d/0x900 fs/eventpoll.c:1861 do_epoll_wait+0x162/0x180 fs/eventpoll.c:2294 __do_sys_epoll_pwait fs/eventpoll.c:2325 [inline] __se_sys_epoll_pwait fs/eventpoll.c:2311 [inline] __x64_sys_epoll_pwait+0xcd/0x180 fs/eventpoll.c:2311 do_syscall_64+0xcc/0x370 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 7472 Comm: syz-fuzzer Not tainted 5.4.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ================================================================== Kernel panic - not syncing: panic_on_warn set ... CPU: 1 PID: 7472 Comm: syz-fuzzer Not tainted 5.4.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x11d/0x181 lib/dump_stack.c:118 panic+0x210/0x640 kernel/panic.c:221 kcsan_report.cold+0xc/0xd kernel/kcsan/report.c:315 kcsan_setup_watchpoint+0x3fe/0x460 kernel/kcsan/core.c:423 check_access kernel/kcsan/core.c:466 [inline] __tsan_read8 kernel/kcsan/core.c:596 [inline] __tsan_read8+0xc6/0x100 kernel/kcsan/core.c:596 list_empty_careful include/linux/list.h:287 [inline] ep_events_available fs/eventpoll.c:380 [inline] ep_poll+0x34d/0x900 fs/eventpoll.c:1861 do_epoll_wait+0x162/0x180 fs/eventpoll.c:2294 __do_sys_epoll_pwait fs/eventpoll.c:2325 [inline] __se_sys_epoll_pwait fs/eventpoll.c:2311 [inline] __x64_sys_epoll_pwait+0xcd/0x180 fs/eventpoll.c:2311 do_syscall_64+0xcc/0x370 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45b300 Code: 0f 05 89 44 24 20 c3 cc cc cc 8b 7c 24 08 48 8b 74 24 10 8b 54 24 18 44 8b 54 24 1c 49 c7 c0 00 00 00 00 b8 19 01 00 00 0f 05 <89> 44 24 20 c3 cc cc cc cc cc cc cc cc cc cc cc 8b 7c 24 08 48 c7 RSP: 002b:00007ffe228e1d40 EFLAGS: 00000246 ORIG_RAX: 0000000000000119 RAX: ffffffffffffffda RBX: 00000000ffffffff RCX: 000000000045b300 RDX: 0000000000000080 RSI: 00007ffe228e1d80 RDI: 0000000000000004 RBP: 00007ffe228e2380 R08: 0000000000000000 R09: 000000000190a040 R10: 00000000ffffffff R11: 0000000000000246 R12: 000000c4205340f8 R13: 000000000000000f R14: 0000000000c28dc0 R15: 0000000000000a01 Kernel Offset: disabled Rebooting in 86400 seconds..
Time | Kernel | Commit | Syzkaller | Config | Log | Report | Syz repro | C repro | VM info | Assets (help?) | Manager | Title |
---|---|---|---|---|---|---|---|---|---|---|---|---|
2019/12/07 19:18 | https://github.com/google/ktsan.git kcsan | ef798c30ba4e | 1508f453 | .config | console log | report | ci2-upstream-kcsan-gce | |||||
2019/11/15 06:44 | https://github.com/google/ktsan.git kcsan | 5863cc791e4c | 79248ee8 | .config | console log | report | ci2-upstream-kcsan-gce | |||||
2019/11/05 12:05 | https://github.com/google/ktsan.git kcsan | 94c006602e13 | 0f3ec414 | .config | console log | report | ci2-upstream-kcsan-gce |