================================================================== BUG: KASAN: invalid-access in __packet_get_status+0x70/0xe0 net/packet/af_packet.c:438 Read at addr fcff00004eed1a80 by task ksoftirqd/1/21 Pointer tag: [fc], memory tag: [f0] CPU: 1 PID: 21 Comm: ksoftirqd/1 Not tainted 6.4.0-rc5-syzkaller-00002-gf8dba31b0a82 #0 Hardware name: linux,dummy-virt (DT) Call trace: dump_backtrace+0x94/0xec arch/arm64/kernel/stacktrace.c:233 show_stack+0x18/0x24 arch/arm64/kernel/stacktrace.c:240 __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x48/0x60 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:351 [inline] print_report+0xd8/0x5f4 mm/kasan/report.c:462 kasan_report+0x7c/0x9c mm/kasan/report.c:572 __do_kernel_fault+0x174/0x1c0 arch/arm64/mm/fault.c:320 do_bad_area arch/arm64/mm/fault.c:479 [inline] do_tag_check_fault+0x78/0x8c arch/arm64/mm/fault.c:791 do_mem_abort+0x44/0x94 arch/arm64/mm/fault.c:867 el1_abort+0x40/0x60 arch/arm64/kernel/entry-common.c:367 el1h_64_sync_handler+0xd8/0xe4 arch/arm64/kernel/entry-common.c:427 el1h_64_sync+0x64/0x68 arch/arm64/kernel/entry.S:586 __packet_get_status+0x70/0xe0 net/packet/af_packet.c:438 packet_lookup_frame net/packet/af_packet.c:524 [inline] packet_current_rx_frame net/packet/af_packet.c:1117 [inline] tpacket_rcv+0x29c/0xbbc net/packet/af_packet.c:2355 dev_queue_xmit_nit+0x284/0x2c8 net/core/dev.c:2281 xmit_one net/core/dev.c:3574 [inline] dev_hard_start_xmit+0x78/0x148 net/core/dev.c:3594 __dev_queue_xmit+0xaa0/0xd40 net/core/dev.c:4244 dev_queue_xmit include/linux/netdevice.h:3085 [inline] can_send+0xc8/0x2d0 net/can/af_can.c:276 bcm_can_tx+0x11c/0x1f0 net/can/bcm.c:302 bcm_tx_timeout_handler+0x50/0x100 net/can/bcm.c:425 __run_hrtimer kernel/time/hrtimer.c:1685 [inline] __hrtimer_run_queues+0x140/0x1d0 kernel/time/hrtimer.c:1749 hrtimer_run_softirq+0x6c/0xc8 kernel/time/hrtimer.c:1766 _stext+0x124/0x290 run_ksoftirqd kernel/softirq.c:939 [inline] run_ksoftirqd+0x38/0x48 kernel/softirq.c:931 smpboot_thread_fn+0x23c/0x268 kernel/smpboot.c:164 kthread+0x118/0x11c kernel/kthread.c:379 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:870 The buggy address belongs to the physical page: page:00000000faebdf93 refcount:9 mapcount:1 mapping:0000000000000000 index:0x0 pfn:0x8eed0 head:00000000faebdf93 order:3 entire_mapcount:0 nr_pages_mapped:8 pincount:0 flags: 0x1ffc0c006010800(arch_1|head|arch_2|arch_3|node=0|zone=0|lastcpupid=0x7ff|kasantag=0x3) page_type: 0x0() raw: 01ffc0c006010800 0000000000000000 dead000000000122 0000000000000000 raw: 0000000000000000 0000000000000000 0000000900000000 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff00004eed1800: f0 f0 f0 f0 f0 f0 f0 f0 f0 f0 f0 f0 f0 f0 f0 f0 ffff00004eed1900: f0 f0 f0 f0 f0 f0 f0 f0 f0 f0 f0 f0 f0 f0 f0 f0 >ffff00004eed1a00: f0 f0 f0 f0 f0 f0 f0 f0 f0 f0 f0 f0 f0 f0 f0 f0 ^ ffff00004eed1b00: f0 f0 f0 f0 f0 f0 f0 f0 f0 f0 f0 f0 f0 f0 f0 f0 ffff00004eed1c00: f0 f0 f0 f0 f0 f0 f0 f0 f0 f0 f0 f0 f0 f0 f0 f0 ==================================================================