syzbot


kernel BUG in eth_header (2)

Status: fixed on 2024/04/02 11:06
Subsystems: net
[Documentation on labels]
Fix commit: dad555c816a5 llc: make llc_ui_sendmsg() more robust against bonding changes
First crash: 126d, last: 126d
Discussions (1)
Title Replies (including bot) Last reply
[PATCH net] llc: make llc_ui_sendmsg() more robust against bonding changes 5 (5) 2024/01/20 05:40
Similar bugs (2)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream kernel BUG in netem_enqueue net 9 523d 748d 22/26 fixed on 2023/02/24 13:50
upstream kernel BUG in eth_header net 2 340d 342d 0/26 auto-obsoleted due to no activity on 2023/09/21 00:49
Last patch testing requests (2)
Created Duration User Patch Repo Result
2024/01/17 15:05 24m edumazet@google.com patch git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci OK log
2024/01/17 11:13 57m edumazet@google.com patch git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci report log

Sample crash report:
skbuff: skb_under_panic: text:ffff800088baa0f0 len:1514 put:14 head:ffff0000d5a86000 data:ffff0000d5a85ff2 tail:0x5dc end:0x6c0 dev:bond0
------------[ cut here ]------------
kernel BUG at net/core/skbuff.c:193!
Internal error: Oops - BUG: 00000000f2000800 [#1] PREEMPT SMP
Modules linked in:
CPU: 0 PID: 6117 Comm: syz-executor841 Not tainted 6.7.0-rc8-syzkaller-g0802e17d9aca #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : skb_panic net/core/skbuff.c:189 [inline]
pc : skb_under_panic+0x13c/0x140 net/core/skbuff.c:203
lr : skb_panic net/core/skbuff.c:189 [inline]
lr : skb_under_panic+0x13c/0x140 net/core/skbuff.c:203
sp : ffff800096f57040
x29: ffff800096f57050 x28: ffff80008cc8d5e8 x27: dfff800000000000
x26: ffff0000d00ab010 x25: 00000000000005dc x24: ffff0000d5a85ff2
x23: ffff0000d5a86000 x22: 00000000000005ea x21: 00000000000006c0
x20: 000000000000000e x19: ffff800088baa0f0 x18: 1fffe000368261ce
x17: ffff80008e4ed000 x16: ffff80008a830eb8 x15: 0000000000000001
x14: 1ffff00012dead60 x13: 0000000000000000 x12: 0000000000000000
x11: 0000000000000001 x10: 0000000000ff0100 x9 : 2761f8ab3184c800
x8 : 2761f8ab3184c800 x7 : ffff80008028f8d0 x6 : 0000000000000000
x5 : 0000000000000001 x4 : 0000000000000001 x3 : ffff800082b78714
x2 : 0000000000000001 x1 : 0000000100000000 x0 : 0000000000000089
Call trace:
 skb_panic net/core/skbuff.c:189 [inline]
 skb_under_panic+0x13c/0x140 net/core/skbuff.c:203
 skb_push+0xf0/0x108 net/core/skbuff.c:2451
 eth_header+0x44/0x1f8 net/ethernet/eth.c:83
 dev_hard_header include/linux/netdevice.h:3188 [inline]
 llc_mac_hdr_init+0x110/0x17c net/llc/llc_output.c:33
 llc_sap_action_send_xid_c+0x170/0x344 net/llc/llc_s_ac.c:85
 llc_exec_sap_trans_actions net/llc/llc_sap.c:153 [inline]
 llc_sap_next_state net/llc/llc_sap.c:182 [inline]
 llc_sap_state_process+0x1ec/0x774 net/llc/llc_sap.c:209
 llc_build_and_send_xid_pkt+0x12c/0x1c0 net/llc/llc_sap.c:270
 llc_ui_sendmsg+0x658/0x96c net/llc/af_llc.c:990
 sock_sendmsg_nosec net/socket.c:730 [inline]
 __sock_sendmsg net/socket.c:745 [inline]
 sock_sendmsg+0x194/0x274 net/socket.c:767
 splice_to_socket+0x7cc/0xd58 fs/splice.c:881
 do_splice_from fs/splice.c:933 [inline]
 direct_splice_actor+0xe4/0x1c0 fs/splice.c:1142
 splice_direct_to_actor+0x2a0/0x7e4 fs/splice.c:1088
 do_splice_direct+0x20c/0x348 fs/splice.c:1194
 do_sendfile+0x4bc/0xc70 fs/read_write.c:1254
 __do_sys_sendfile64 fs/read_write.c:1322 [inline]
 __se_sys_sendfile64 fs/read_write.c:1308 [inline]
 __arm64_sys_sendfile64+0x160/0x3b4 fs/read_write.c:1308
 __invoke_syscall arch/arm64/kernel/syscall.c:37 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:51
 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:136
 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:155
 el0_svc+0x54/0x158 arch/arm64/kernel/entry-common.c:678
 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:696
 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:595
Code: aa1803e6 aa1903e7 a90023f5 94792eda (d4210000) 
---[ end trace 0000000000000000 ]---

Crashes (2):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/01/17 06:13 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 0802e17d9aca 2a7bcc7f .config console log report syz C [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 kernel BUG in eth_header
2024/01/17 05:04 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 0802e17d9aca 2a7bcc7f .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 kernel BUG in eth_header
* Struck through repros no longer work on HEAD.