Hello, As part of the kernel research at ASU's SEFCOM lab, we hit the crash below. Crash reports can be found here:
https://github.com/farhad-alemi/public_bug_reports/tree/main/182-warning-in-lowpan-compress-addr-64/ WARNING: net/6lowpan/iphc.c:937 at lowpan_iphc_compress_802154_lladdr net/6lowpan/iphc.c:937 [inline], CPU#0: syz.9.76/13660 WARNING: net/6lowpan/iphc.c:937 at lowpan_compress_addr_64+0x4be/0x9c0 net/6lowpan/iphc.c:952, CPU#0: syz.9.76/13660 RIP: 0010:lowpan_compress_addr_64+0x4be/0x9c0 net/6lowpan/iphc.c:952 Call Trace: lowpan_compress_addr_64+0x4be/0x9c0 net/6lowpan/iphc.c:952 lowpan_header_compress+0xeef/0x1ef0 net/6lowpan/iphc.c:1242 lowpan_header net/ieee802154/6lowpan/tx.c:234 [inline] lowpan_xmit+0x4c6/0x1420 net/ieee802154/6lowpan/tx.c:282 dev_hard_start_xmit+0x23b/0x620 net/core/dev.c:3904 __dev_queue_xmit+0x11e7/0x3250 net/core/dev.c:4870 packet_snd net/packet/af_packet.c:3082 [inline] packet_sendmsg+0x3d9b/0x5150 net/packet/af_packet.c:3114 Kernel panic - not syncing: kernel: panic_on_warn set ... Our reproducer.c is available upon request. Happy to test a patch if that would help. Regards,
