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================================================================== BUG: KCSAN: data-race in __bpf_lru_list_rotate_inactive.isra.0 / __htab_lru_percpu_map_update_elem write to 0xffff88809ae5ee23 of 1 bytes by task 14843 on cpu 1: bpf_lru_node_set_ref kernel/bpf/bpf_lru_list.h:70 [inline] __htab_lru_percpu_map_update_elem+0x40d/0x630 kernel/bpf/hashtab.c:1174 bpf_percpu_hash_update+0x9e/0xb0 kernel/bpf/hashtab.c:1707 bpf_map_update_value.isra.0+0x25b/0x420 kernel/bpf/syscall.c:178 generic_map_update_batch+0x273/0x3c0 kernel/bpf/syscall.c:1326 bpf_map_do_batch+0x194/0x3a0 kernel/bpf/syscall.c:3556 __do_sys_bpf+0x1cca/0x3100 kernel/bpf/syscall.c:3767 __se_sys_bpf kernel/bpf/syscall.c:3661 [inline] __x64_sys_bpf+0x47/0x60 kernel/bpf/syscall.c:3661 do_syscall_64+0xc7/0x3b0 arch/x86/entry/common.c:295 entry_SYSCALL_64_after_hwframe+0x44/0xa9 read to 0xffff88809ae5ee23 of 1 bytes by task 14839 on cpu 0: __bpf_lru_list_rotate_inactive.isra.0+0x122/0x1d0 kernel/bpf/bpf_lru_list.c:190 __bpf_lru_list_rotate kernel/bpf/bpf_lru_list.c:242 [inline] bpf_lru_list_pop_free_to_local kernel/bpf/bpf_lru_list.c:329 [inline] bpf_common_lru_pop_free kernel/bpf/bpf_lru_list.c:447 [inline] bpf_lru_pop_free+0x452/0xa30 kernel/bpf/bpf_lru_list.c:499 prealloc_lru_pop+0x30/0x70 kernel/bpf/hashtab.c:237 __htab_lru_percpu_map_update_elem+0x37a/0x630 kernel/bpf/hashtab.c:1160 bpf_percpu_hash_update+0x9e/0xb0 kernel/bpf/hashtab.c:1707 bpf_map_update_value.isra.0+0x25b/0x420 kernel/bpf/syscall.c:178 generic_map_update_batch+0x273/0x3c0 kernel/bpf/syscall.c:1326 bpf_map_do_batch+0x194/0x3a0 kernel/bpf/syscall.c:3556 __do_sys_bpf+0x1cca/0x3100 kernel/bpf/syscall.c:3767 __se_sys_bpf kernel/bpf/syscall.c:3661 [inline] __x64_sys_bpf+0x47/0x60 kernel/bpf/syscall.c:3661 do_syscall_64+0xc7/0x3b0 arch/x86/entry/common.c:295 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 14839 Comm: syz-executor.4 Not tainted 5.7.0-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 |
---|---|---|---|---|---|---|---|---|---|---|---|---|
2020/06/02 16:31 | https://github.com/google/ktsan.git kcsan | 7c3cd68e5d38 | 52fd7b7d | .config | console log | report | ci2-upstream-kcsan-gce | |||||
2020/03/30 23:48 | https://github.com/google/ktsan.git kcsan | 40959e34d670 | c8d1cc20 | .config | console log | report | ci2-upstream-kcsan-gce | |||||
2020/03/24 12:46 | https://github.com/google/ktsan.git kcsan | 40959e34d670 | 33e14df3 | .config | console log | report | ci2-upstream-kcsan-gce |