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================================================================== BUG: KCSAN: data-race in ctx_sched_out / perf_event_update_time read-write to 0xffff88815a7aa590 of 8 bytes by task 23754 on cpu 0: __update_context_time kernel/events/core.c:1458 [inline] update_context_time kernel/events/core.c:1475 [inline] ctx_sched_out+0x15b/0x300 kernel/events/core.c:3288 task_ctx_sched_out kernel/events/core.c:2644 [inline] perf_event_context_sched_out kernel/events/core.c:3552 [inline] __perf_event_task_sched_out+0x3f4/0xe50 kernel/events/core.c:3651 perf_event_task_sched_out include/linux/perf_event.h:1484 [inline] prepare_task_switch kernel/sched/core.c:5180 [inline] context_switch kernel/sched/core.c:5323 [inline] __schedule+0x8c4/0x8d0 kernel/sched/core.c:6688 __schedule_loop kernel/sched/core.c:6763 [inline] schedule+0x54/0x80 kernel/sched/core.c:6778 schedule_preempt_disabled+0x10/0x20 kernel/sched/core.c:6835 rwsem_down_write_slowpath+0x39d/0x8d0 kernel/locking/rwsem.c:1178 __down_write_common kernel/locking/rwsem.c:1306 [inline] __down_write_killable kernel/locking/rwsem.c:1320 [inline] down_write_killable+0x4d/0x90 kernel/locking/rwsem.c:1592 mmap_write_lock_killable include/linux/mmap_lock.h:124 [inline] vm_mmap_pgoff+0xd9/0x240 mm/util.c:544 ksys_mmap_pgoff+0x2b8/0x330 mm/mmap.c:1425 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 0xffff88815a7aa590 of 8 bytes by task 23755 on cpu 1: perf_event_update_time+0xa0/0x1b0 kernel/events/core.c:639 perf_mmap+0xa36/0xcb0 kernel/events/core.c:6588 call_mmap include/linux/fs.h:2025 [inline] mmap_region+0xa56/0x16e0 mm/mmap.c:2851 do_mmap+0x67e/0xa90 mm/mmap.c:1379 vm_mmap_pgoff+0x12e/0x240 mm/util.c:546 ksys_mmap_pgoff+0x2b8/0x330 mm/mmap.c:1425 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: 0x000000000005e979 -> 0x00000000000604f9 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 23755 Comm: syz-executor.4 Not tainted 6.7.0-rc1-syzkaller-00012-g9bacdd8996c7 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023 ==================================================================
Time | Kernel | Commit | Syzkaller | Config | Log | Report | Syz repro | C repro | VM info | Assets (help?) | Manager | Title |
---|---|---|---|---|---|---|---|---|---|---|---|---|
2023/11/14 08:47 | upstream | 9bacdd8996c7 | cb976f63 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-upstream-kcsan-gce | KCSAN: data-race in ctx_sched_out / perf_event_update_time |