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================================================================== BUG: KCSAN: data-race in bpf_lru_pop_free / htab_lru_map_update_elem write to 0xffff888137958223 of 1 bytes by task 4555 on cpu 1: bpf_lru_node_set_ref kernel/bpf/bpf_lru_list.h:70 [inline] htab_lru_map_update_elem+0x440/0x730 kernel/bpf/hashtab.c:1172 bpf_map_update_value+0x1b9/0x2f0 kernel/bpf/syscall.c:222 generic_map_update_batch+0x364/0x4c0 kernel/bpf/syscall.c:1409 bpf_map_do_batch+0x33e/0x3a0 __sys_bpf+0x9ae/0xa3c0 __do_sys_bpf kernel/bpf/syscall.c:4737 [inline] __se_sys_bpf kernel/bpf/syscall.c:4735 [inline] __x64_sys_bpf+0x3f/0x50 kernel/bpf/syscall.c:4735 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 0xffff888137958223 of 1 bytes by task 4545 on cpu 0: bpf_lru_node_is_ref kernel/bpf/bpf_lru_list.c:44 [inline] __local_list_pop_pending kernel/bpf/bpf_lru_list.c:384 [inline] bpf_common_lru_pop_free kernel/bpf/bpf_lru_list.c:476 [inline] bpf_lru_pop_free+0xb79/0xef0 kernel/bpf/bpf_lru_list.c:499 prealloc_lru_pop kernel/bpf/hashtab.c:290 [inline] htab_lru_map_update_elem+0xb4/0x730 kernel/bpf/hashtab.c:1151 bpf_map_update_value+0x1b9/0x2f0 kernel/bpf/syscall.c:222 generic_map_update_batch+0x364/0x4c0 kernel/bpf/syscall.c:1409 bpf_map_do_batch+0x33e/0x3a0 __sys_bpf+0x9ae/0xa3c0 __do_sys_bpf kernel/bpf/syscall.c:4737 [inline] __se_sys_bpf kernel/bpf/syscall.c:4735 [inline] __x64_sys_bpf+0x3f/0x50 kernel/bpf/syscall.c:4735 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: 0 PID: 4545 Comm: syz-executor.4 Not tainted 5.16.0-rc4-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 |
---|---|---|---|---|---|---|---|---|---|---|---|---|
2021/12/12 23:00 | upstream | 90d9fbc16b69 | 49ca1f59 | .config | console log | report | info | ci2-upstream-kcsan-gce | KCSAN: data-race in bpf_lru_pop_free / htab_lru_map_update_elem | |||
2021/11/10 18:12 | upstream | 89d714ab6043 | 75b04091 | .config | console log | report | info | ci2-upstream-kcsan-gce | KCSAN: data-race in bpf_lru_pop_free / htab_lru_map_update_elem | |||
2021/11/09 14:03 | upstream | d2f38a3c6507 | 59bcaf9a | .config | console log | report | info | ci2-upstream-kcsan-gce | KCSAN: data-race in bpf_lru_pop_free / htab_lru_map_update_elem |