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================================================================== BUG: KCSAN: data-race in __htab_lru_percpu_map_update_elem / bpf_lru_pop_free write to 0xffff888102fd1623 of 1 bytes by task 17051 on cpu 0: bpf_lru_node_set_ref kernel/bpf/bpf_lru_list.h:70 [inline] __htab_lru_percpu_map_update_elem+0x44c/0x7e0 kernel/bpf/hashtab.c:1291 bpf_percpu_hash_update+0x5a/0x90 kernel/bpf/hashtab.c:2216 bpf_map_update_value+0x1dd/0x2f0 kernel/bpf/syscall.c:197 generic_map_update_batch+0x364/0x4c0 kernel/bpf/syscall.c:1410 bpf_map_do_batch+0x33e/0x3a0 __sys_bpf+0x9b4/0xa3c0 __do_sys_bpf kernel/bpf/syscall.c:4738 [inline] __se_sys_bpf kernel/bpf/syscall.c:4736 [inline] __x64_sys_bpf+0x3f/0x50 kernel/bpf/syscall.c:4736 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 read to 0xffff888102fd1623 of 1 bytes by task 17043 on cpu 1: bpf_lru_node_is_ref kernel/bpf/bpf_lru_list.c:44 [inline] __local_list_flush kernel/bpf/bpf_lru_list.c:297 [inline] bpf_lru_list_pop_free_to_local kernel/bpf/bpf_lru_list.c:327 [inline] bpf_common_lru_pop_free kernel/bpf/bpf_lru_list.c:447 [inline] bpf_lru_pop_free+0x2ad/0xef0 kernel/bpf/bpf_lru_list.c:499 prealloc_lru_pop kernel/bpf/hashtab.c:290 [inline] __htab_lru_percpu_map_update_elem+0xd8/0x7e0 kernel/bpf/hashtab.c:1275 bpf_percpu_hash_update+0x5a/0x90 kernel/bpf/hashtab.c:2216 bpf_map_update_value+0x1dd/0x2f0 kernel/bpf/syscall.c:197 generic_map_update_batch+0x364/0x4c0 kernel/bpf/syscall.c:1410 bpf_map_do_batch+0x33e/0x3a0 __sys_bpf+0x9b4/0xa3c0 __do_sys_bpf kernel/bpf/syscall.c:4738 [inline] __se_sys_bpf kernel/bpf/syscall.c:4736 [inline] __x64_sys_bpf+0x3f/0x50 kernel/bpf/syscall.c:4736 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: 0x00 -> 0x01 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 17043 Comm: syz-executor.0 Not tainted 5.17.0-rc1-syzkaller #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 |
---|---|---|---|---|---|---|---|---|---|---|---|---|
2022/01/26 08:27 | upstream | 0280e3c58f92 | 2cbffd88 | .config | console log | report | info | ci2-upstream-kcsan-gce | KCSAN: data-race in __htab_lru_percpu_map_update_elem / bpf_lru_pop_free |