EXT4-fs error (device loop1): ext4_free_branches:1030: inode #11: comm syz-executor.1: invalid indirect mapped block 1 (level 1) EXT4-fs (loop1): 1 truncate cleaned up EXT4-fs (loop1): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. ================================================================== BUG: KCSAN: data-race in pcpu_alloc / pcpu_free_area read-write to 0xffffffff884054dc of 4 bytes by task 1248 on cpu 0: pcpu_update_empty_pages mm/percpu.c:602 [inline] pcpu_block_update_hint_free mm/percpu.c:1044 [inline] pcpu_free_area+0x4e2/0x570 mm/percpu.c:1302 free_percpu+0x1c6/0xb30 mm/percpu.c:2303 bpf_array_free_percpu kernel/bpf/arraymap.c:27 [inline] array_map_free+0x292/0x310 kernel/bpf/arraymap.c:436 bpf_map_free_deferred+0xae/0x150 kernel/bpf/syscall.c:734 process_one_work kernel/workqueue.c:3267 [inline] process_scheduled_works+0x465/0x990 kernel/workqueue.c:3348 worker_thread+0x526/0x730 kernel/workqueue.c:3429 kthread+0x1d1/0x210 kernel/kthread.c:388 ret_from_fork+0x4b/0x60 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 read to 0xffffffff884054dc of 4 bytes by task 5437 on cpu 1: pcpu_alloc+0x9aa/0x10d0 mm/percpu.c:1868 __alloc_percpu+0x24/0x30 mm/percpu.c:1943 alloc_vfsmnt+0xf7/0x300 fs/namespace.c:220 vfs_create_mount+0x49/0x240 fs/namespace.c:1103 do_new_mount_fc fs/namespace.c:3283 [inline] do_new_mount+0x2f1/0x690 fs/namespace.c:3354 path_mount+0x49b/0xb30 fs/namespace.c:3679 do_mount fs/namespace.c:3692 [inline] __do_sys_mount fs/namespace.c:3898 [inline] __se_sys_mount+0x27f/0x2d0 fs/namespace.c:3875 __x64_sys_mount+0x67/0x80 fs/namespace.c:3875 x64_sys_call+0x2591/0x2d30 arch/x86/include/generated/asm/syscalls_64.h:166 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x1d0 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f value changed: 0x00000013 -> 0x00000014 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 5437 Comm: syz-executor.1 Tainted: G W 6.9.0-rc6-syzkaller-00234-g7367539ad4b0 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 ==================================================================