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================================================================== BUG: KCSAN: data-race in pcpu_alloc / pcpu_balance_workfn read-write to 0xffffffff86f8615c of 4 bytes by task 3067 on cpu 1: pcpu_update_empty_pages mm/percpu.c:602 [inline] pcpu_chunk_populated mm/percpu.c:1531 [inline] pcpu_balance_populated mm/percpu.c:2088 [inline] pcpu_balance_workfn+0x96f/0xa80 mm/percpu.c:2238 process_one_work+0x434/0x860 kernel/workqueue.c:2597 worker_thread+0x5f2/0xa10 kernel/workqueue.c:2748 kthread+0x1d7/0x210 kernel/kthread.c:389 ret_from_fork+0x2e/0x40 arch/x86/kernel/process.c:145 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:296 read to 0xffffffff86f8615c of 4 bytes by task 4000 on cpu 0: pcpu_alloc+0xa59/0x1280 mm/percpu.c:1870 __alloc_percpu_gfp+0x26/0x30 mm/percpu.c:1930 bpf_map_alloc_percpu+0xaa/0x200 kernel/bpf/syscall.c:464 htab_map_alloc+0x37b/0xde0 kernel/bpf/hashtab.c:521 map_create+0x713/0xa60 kernel/bpf/syscall.c:1206 __sys_bpf+0x62a/0x780 kernel/bpf/syscall.c:5119 __do_sys_bpf kernel/bpf/syscall.c:5241 [inline] __se_sys_bpf kernel/bpf/syscall.c:5239 [inline] __x64_sys_bpf+0x43/0x50 kernel/bpf/syscall.c:5239 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd value changed: 0x00000000 -> 0xfffffffc Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 4000 Comm: syz-executor.3 Not tainted 6.5.0-rc2-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/03/2023 ==================================================================
Time | Kernel | Commit | Syzkaller | Config | Log | Report | Syz repro | C repro | VM info | Assets (help?) | Manager | Title |
---|---|---|---|---|---|---|---|---|---|---|---|---|
2023/07/17 13:19 | upstream | fdf0eaf11452 | 20f8b3c2 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-upstream-kcsan-gce | KCSAN: data-race in pcpu_alloc / pcpu_balance_workfn | ||
2023/07/11 14:51 | upstream | 3f01e9fed845 | 2f19aa4f | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-upstream-kcsan-gce | KCSAN: data-race in pcpu_alloc / pcpu_balance_workfn | ||
2023/07/07 02:35 | upstream | a452483508d7 | 22ae5830 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-upstream-kcsan-gce | KCSAN: data-race in pcpu_alloc / pcpu_balance_workfn | ||
2023/06/18 18:15 | upstream | 8c1f0c38b310 | f3921d4d | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-upstream-kcsan-gce | KCSAN: data-race in pcpu_alloc / pcpu_balance_workfn | ||
2023/06/17 02:39 | upstream | 1639fae5132b | f3921d4d | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-upstream-kcsan-gce | KCSAN: data-race in pcpu_alloc / pcpu_balance_workfn | ||
2023/06/09 14:45 | upstream | 33f2b5785a2b | 9018a337 | .config | console log | report | info | ci2-upstream-kcsan-gce | KCSAN: data-race in pcpu_alloc / pcpu_balance_workfn | |||
2023/06/06 14:06 | upstream | a4d7d7011219 | a4ae4f42 | .config | console log | report | info | ci2-upstream-kcsan-gce | KCSAN: data-race in pcpu_alloc / pcpu_balance_workfn |