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================================================================== BUG: KCSAN: data-race in bpf_percpu_array_update / bpf_percpu_array_update write to 0xffffe8ffff61dbb8 of 8 bytes by task 19504 on cpu 1: bpf_long_memcpy include/linux/bpf.h:1663 [inline] bpf_percpu_array_update+0x25c/0x3d0 kernel/bpf/arraymap.c:366 bpf_map_update_value+0x181/0x2f0 kernel/bpf/syscall.c:199 map_update_elem kernel/bpf/syscall.c:1181 [inline] __sys_bpf+0x6134/0xa3c0 kernel/bpf/syscall.c:4625 __do_sys_bpf kernel/bpf/syscall.c:4741 [inline] __se_sys_bpf kernel/bpf/syscall.c:4739 [inline] __x64_sys_bpf+0x3f/0x50 kernel/bpf/syscall.c:4739 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae write to 0xffffe8ffff61dbb8 of 8 bytes by task 19503 on cpu 0: bpf_long_memcpy include/linux/bpf.h:1663 [inline] bpf_percpu_array_update+0x25c/0x3d0 kernel/bpf/arraymap.c:366 bpf_map_update_value+0x181/0x2f0 kernel/bpf/syscall.c:199 map_update_elem kernel/bpf/syscall.c:1181 [inline] __sys_bpf+0x6134/0xa3c0 kernel/bpf/syscall.c:4625 __do_sys_bpf kernel/bpf/syscall.c:4741 [inline] __se_sys_bpf kernel/bpf/syscall.c:4739 [inline] __x64_sys_bpf+0x3f/0x50 kernel/bpf/syscall.c:4739 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae value changed: 0x0000000000000000 -> 0x21aca4173a9f473e Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 19503 Comm: syz-executor.3 Not tainted 5.17.0-rc7-syzkaller-00020-gea4424be1688-dirty #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================
Time | Kernel | Commit | Syzkaller | Config | Log | Report | Syz repro | C repro | VM info | Assets (help?) | Manager | Title |
---|---|---|---|---|---|---|---|---|---|---|---|---|
2022/03/08 04:00 | upstream | ea4424be1688 | 7bdd8b2c | .config | console log | report | info | ci2-upstream-kcsan-gce | KCSAN: data-race in bpf_percpu_array_update / bpf_percpu_array_update |