dev_map_free+0x2db/0x630 kernel/bpf/devmap.c:241 bpf_map_free_deferred+0xa8/0x100 kernel/bpf/syscall.c:311 process_one_work+0x765/0xd20 kernel/workqueue.c:2290 worker_thread+0xaef/0x1470 kernel/workqueue.c:2436 kthread+0x2da/0x360 kernel/kthread.c:288 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:354 ---[ end trace beeb8ac803e56273 ]--- kasan: CONFIG_KASAN_INLINE enabled kasan: GPF could be caused by NULL-ptr deref or user memory access general protection fault: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 108 Comm: kworker/0:2 Tainted: G W 5.4.289-syzkaller-00030-gcb850525fc3e #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024 Workqueue: events bpf_map_free_deferred RIP: 0010:pcpu_get_page_chunk mm/percpu.c:253 [inline] RIP: 0010:pcpu_chunk_addr_search mm/percpu.c:1568 [inline] RIP: 0010:free_percpu+0x26d/0x910 mm/percpu.c:1972 Code: e8 03 42 80 3c 30 00 74 08 48 89 df e8 8c d5 0c 00 48 8b 3b 48 01 ef e8 61 63 07 00 48 89 c3 48 83 c3 20 48 89 d8 48 c1 e8 03 <42> 80 3c 30 00 74 08 48 89 df e8 64 d5 0c 00 4c 8b 23 4d 8d 7c 24 RSP: 0018:ffff8881ede3fc78 EFLAGS: 00010002 RAX: 0000000000000004 RBX: 0000000000000020 RCX: ffff8881ee27de80 RDX: 0000000000000000 RSI: 8000000000000180 RDI: 0000000000000000 RBP: ffff88817ad3ea30 R08: ffffffff818ec3e6 R09: 0000000000000003 R10: ffffffffffffffff R11: dffffc0000000001 R12: ffff88823fe9f5c0 R13: ffffffff83f3ea30 R14: dffffc0000000000 R15: ffff88817ad3ea30 FS: 0000000000000000(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00002000000c5000 CR3: 00000001e04f4000 CR4: 00000000003406b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: dev_map_free+0x2db/0x630 kernel/bpf/devmap.c:241 bpf_map_free_deferred+0xa8/0x100 kernel/bpf/syscall.c:311 process_one_work+0x765/0xd20 kernel/workqueue.c:2290 worker_thread+0xaef/0x1470 kernel/workqueue.c:2436 kthread+0x2da/0x360 kernel/kthread.c:288 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:354 Modules linked in: ---[ end trace beeb8ac803e56274 ]--- RIP: 0010:pcpu_get_page_chunk mm/percpu.c:253 [inline] RIP: 0010:pcpu_chunk_addr_search mm/percpu.c:1568 [inline] RIP: 0010:free_percpu+0x26d/0x910 mm/percpu.c:1972 Code: e8 03 42 80 3c 30 00 74 08 48 89 df e8 8c d5 0c 00 48 8b 3b 48 01 ef e8 61 63 07 00 48 89 c3 48 83 c3 20 48 89 d8 48 c1 e8 03 <42> 80 3c 30 00 74 08 48 89 df e8 64 d5 0c 00 4c 8b 23 4d 8d 7c 24 RSP: 0018:ffff8881ede3fc78 EFLAGS: 00010002 RAX: 0000000000000004 RBX: 0000000000000020 RCX: ffff8881ee27de80 RDX: 0000000000000000 RSI: 8000000000000180 RDI: 0000000000000000 RBP: ffff88817ad3ea30 R08: ffffffff818ec3e6 R09: 0000000000000003 R10: ffffffffffffffff R11: dffffc0000000001 R12: ffff88823fe9f5c0 R13: ffffffff83f3ea30 R14: dffffc0000000000 R15: ffff88817ad3ea30 FS: 0000000000000000(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00002000000c5000 CR3: 00000001e04f4000 CR4: 00000000003406b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 ---------------- Code disassembly (best guess): 0: e8 03 42 80 3c call 0x3c804208 5: 30 00 xor %al,(%rax) 7: 74 08 je 0x11 9: 48 89 df mov %rbx,%rdi c: e8 8c d5 0c 00 call 0xcd59d 11: 48 8b 3b mov (%rbx),%rdi 14: 48 01 ef add %rbp,%rdi 17: e8 61 63 07 00 call 0x7637d 1c: 48 89 c3 mov %rax,%rbx 1f: 48 83 c3 20 add $0x20,%rbx 23: 48 89 d8 mov %rbx,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 42 80 3c 30 00 cmpb $0x0,(%rax,%r14,1) <-- trapping instruction 2f: 74 08 je 0x39 31: 48 89 df mov %rbx,%rdi 34: e8 64 d5 0c 00 call 0xcd59d 39: 4c 8b 23 mov (%rbx),%r12 3c: 4d rex.WRB 3d: 8d .byte 0x8d 3e: 7c 24 jl 0x64