syzbot


kernel BUG in pskb_expand_head

Status: auto-obsoleted due to no activity on 2023/08/14 13:19
Reported-by: syzbot+4d426a3b174594b0573d@syzkaller.appspotmail.com
First crash: 369d, last: 369d
Similar bugs (5)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
android-6-1 kernel BUG in pskb_expand_head 1 317d 317d 0/2 auto-obsoleted due to no activity on 2023/09/05 19:11
upstream kernel BUG in pskb_expand_head (2) bpf net 10 330d 345d 0/26 auto-obsoleted due to no activity on 2023/08/23 09:08
upstream kernel BUG in llc_sap_action_send_xid_c net C error 61 892d 1106d 20/26 fixed on 2021/11/10 00:50
upstream kernel BUG in pskb_expand_head net C done 1600 435d 887d 22/26 fixed on 2023/02/25 08:02
linux-6.1 kernel BUG in pskb_expand_head 1 325d 325d 0/3 auto-obsoleted due to no activity on 2023/09/07 17:22

Sample crash report:
------------[ cut here ]------------
kernel BUG at net/core/skbuff.c:1697!
Internal error: Oops - BUG: 0 [#1] PREEMPT SMP
Modules linked in:
CPU: 1 PID: 10953 Comm: syz-executor.3 Not tainted 5.15.107-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023
pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : pskb_expand_head+0x1010/0x1064 net/core/skbuff.c:1697
lr : pskb_expand_head+0x1010/0x1064 net/core/skbuff.c:1697
sp : ffff800026516740
x29: ffff800026516790 x28: ffff0000d2832000 x27: dfff800000000000
x26: dfff800000000000 x25: 00000000000006c0 x24: 0000000000000000
x23: 0000000000000a20 x22: 0000000000000002 x21: 00000000000000c0
x20: ffff0000c82755c4 x19: ffff0000c8275500 x18: 0000000000000402
x17: ff8080000fd1b1bc x16: ffff8000084bfc48 x15: ffff80000896ffc0
x14: ffff800008974754 x13: ffffffffffffffff x12: 0000000000040000
x11: 0000000000002ecb x10: ffff8000200db000 x9 : ffff80000fd26dc4
x8 : 0000000000002ecc x7 : 0000000000000000 x6 : ffff80000805cb20
x5 : ffff000128835298 x4 : 0000000000000000 x3 : ffff80000fd25e3c
x2 : 0000000000000000 x1 : 0000000000000002 x0 : 0000000000000001
Call trace:
 pskb_expand_head+0x1010/0x1064 net/core/skbuff.c:1697
 __skb_cow include/linux/skbuff.h:3364 [inline]
 skb_cow_head include/linux/skbuff.h:3398 [inline]
 erspan_xmit+0x5a4/0x14cc net/ipv4/ip_gre.c:688
 __netdev_start_xmit include/linux/netdevice.h:5019 [inline]
 netdev_start_xmit include/linux/netdevice.h:5033 [inline]
 xmit_one net/core/dev.c:3592 [inline]
 dev_hard_start_xmit+0x2bc/0x92c net/core/dev.c:3608
 sch_direct_xmit+0x2e0/0x484 net/sched/sch_generic.c:342
 __dev_xmit_skb net/core/dev.c:3819 [inline]
 __dev_queue_xmit+0x14b4/0x2a6c net/core/dev.c:4188
 dev_queue_xmit+0x24/0x34 net/core/dev.c:4256
 bond_start_xmit+0xdc4/0x157c drivers/net/bonding/bond_main.c:5155
 __netdev_start_xmit include/linux/netdevice.h:5019 [inline]
 netdev_start_xmit include/linux/netdevice.h:5033 [inline]
 xmit_one net/core/dev.c:3592 [inline]
 dev_hard_start_xmit+0x2bc/0x92c net/core/dev.c:3608
 __dev_queue_xmit+0x13a8/0x2a6c net/core/dev.c:4223
 dev_queue_xmit+0x24/0x34 net/core/dev.c:4256
 llc_sap_action_send_xid_c+0x1dc/0x350 net/llc/llc_s_ac.c:88
 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/0x710 net/llc/llc_sap.c:209
 llc_build_and_send_xid_pkt+0x12c/0x1c0 net/llc/llc_sap.c:270
 llc_ui_sendmsg+0x650/0x964 net/llc/af_llc.c:986
 sock_sendmsg_nosec net/socket.c:704 [inline]
 sock_sendmsg net/socket.c:724 [inline]
 kernel_sendmsg+0xec/0x12c net/socket.c:744
 sock_no_sendpage+0x178/0x1f0 net/core/sock.c:3002
 kernel_sendpage+0x24c/0x300 net/socket.c:3507
 sock_sendpage+0x88/0xcc net/socket.c:1006
 pipe_to_sendpage+0x1fc/0x2d4 fs/splice.c:364
 splice_from_pipe_feed fs/splice.c:418 [inline]
 __splice_from_pipe+0x2c8/0x7d8 fs/splice.c:562
 splice_from_pipe fs/splice.c:597 [inline]
 generic_splice_sendpage+0x168/0x1fc fs/splice.c:746
 do_splice_from fs/splice.c:767 [inline]
 direct_splice_actor+0xe4/0x1c0 fs/splice.c:936
 splice_direct_to_actor+0x408/0x9a0 fs/splice.c:891
 do_splice_direct+0x1f4/0x334 fs/splice.c:979
 do_sendfile+0x4bc/0xc70 fs/read_write.c:1249
 __do_sys_sendfile64 fs/read_write.c:1317 [inline]
 __se_sys_sendfile64 fs/read_write.c:1303 [inline]
 __arm64_sys_sendfile64+0x160/0x408 fs/read_write.c:1303
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181
 el0_svc+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:596
 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:614
 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584
Code: d4210000 961e631c d4210000 961e631a (d4210000) 
---[ end trace 7119108d8de0e08f ]---

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2023/04/16 13:19 linux-5.15.y 4fdad925aa1a ec410564 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 kernel BUG in pskb_expand_head
* Struck through repros no longer work on HEAD.