syzbot


kernel BUG in pskb_expand_head

Status: auto-obsoleted due to no activity on 2023/09/07 17:22
Reported-by: syzbot+8106a9f80d9818d5ead8@syzkaller.appspotmail.com
First crash: 326d, last: 326d
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 318d 318d 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 331d 346d 0/26 auto-obsoleted due to no activity on 2023/08/23 09:08
linux-5.15 kernel BUG in pskb_expand_head 1 370d 370d 0/3 auto-obsoleted due to no activity on 2023/08/14 13:19
upstream kernel BUG in llc_sap_action_send_xid_c net C error 61 893d 1107d 20/26 fixed on 2021/11/10 00:50
upstream kernel BUG in pskb_expand_head net C done 1600 436d 887d 22/26 fixed on 2023/02/25 08:02

Sample crash report:
------------[ cut here ]------------
kernel BUG at net/core/skbuff.c:1833!
Internal error: Oops - BUG: 00000000f2000800 [#1] PREEMPT SMP
Modules linked in:
CPU: 1 PID: 13553 Comm: syz-executor.5 Not tainted 6.1.31-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/28/2023
pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : pskb_expand_head+0x105c/0x10b4 net/core/skbuff.c:1833
lr : pskb_expand_head+0x105c/0x10b4 net/core/skbuff.c:1833
sp : ffff80001f0273e0
x29: ffff80001f027440 x28: 00000000000002c0 x27: dfff800000000000
x26: 0000000000000000 x25: 0000000000000a20 x24: ffff8000103b5d98
x23: ffff0000cf0630cc x22: 0000000000000000 x21: 0000000000000002
x20: ffff0000cf0630cc x19: ffff0000cf063000 x18: 1fffe000368b9f76
x17: ffff8000155bd000 x16: ffff8000084fa384 x15: ffff0001b45cfbbc
x14: 1ffff00002ab80b0 x13: dfff800000000000 x12: 0000000000040000
x11: 0000000000003ab0 x10: ffff80001dc99000 x9 : ffff80001039ba60
x8 : 0000000000003ab1 x7 : ffff8000105802d8 x6 : 0000000000000000
x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff80001039aa90
x2 : 0000000000000000 x1 : 0000000000000002 x0 : 0000000000000001
Call trace:
 pskb_expand_head+0x105c/0x10b4 net/core/skbuff.c:1833
 skb_ensure_writable+0x244/0x388 net/core/skbuff.c:5760
 __bpf_try_make_writable net/core/filter.c:1658 [inline]
 sk_skb_try_make_writable net/core/filter.c:1870 [inline]
 ____sk_skb_pull_data net/core/filter.c:1884 [inline]
 sk_skb_pull_data+0x7c/0xc8 net/core/filter.c:1873
 bpf_prog_53daab6e9cefb4fc+0x50/0x80
 bpf_dispatcher_nop_func include/linux/bpf.h:975 [inline]
 __bpf_prog_run include/linux/filter.h:600 [inline]
 bpf_prog_run include/linux/filter.h:607 [inline]
 bpf_prog_run_pin_on_cpu+0x74/0x1e4 include/linux/filter.h:624
 sk_psock_verdict_recv+0x27c/0x530 net/core/skmsg.c:1198
 tcp_read_skb+0x384/0x5f8 net/ipv4/tcp.c:1774
 sk_psock_verdict_data_ready+0x98/0xc4 net/core/skmsg.c:1215
 tcp_data_ready+0x22c/0x450 net/ipv4/tcp_input.c:5005
 tcp_rcv_established+0x12a4/0x1fe0 net/ipv4/tcp_input.c:5972
 tcp_v4_do_rcv+0x390/0xb08 net/ipv4/tcp_ipv4.c:1671
 sk_backlog_rcv include/net/sock.h:1109 [inline]
 __release_sock+0x1a8/0x408 net/core/sock.c:2909
 release_sock+0x68/0x1cc net/core/sock.c:3473
 tcp_sendmsg+0x4c/0x64 net/ipv4/tcp.c:1487
 inet_sendmsg+0x15c/0x290 net/ipv4/af_inet.c:828
 sock_sendmsg_nosec net/socket.c:716 [inline]
 sock_sendmsg net/socket.c:736 [inline]
 __sys_sendto+0x3b4/0x504 net/socket.c:2117
 __do_sys_sendto net/socket.c:2129 [inline]
 __se_sys_sendto net/socket.c:2125 [inline]
 __arm64_sys_sendto+0xd8/0xf8 net/socket.c:2125
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
 do_el0_svc+0x64/0x218 arch/arm64/kernel/syscall.c:206
 el0_svc+0x58/0x168 arch/arm64/kernel/entry-common.c:637
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:581
Code: d4210000 96057a4c d4210000 96057a4a (d4210000) 
---[ end trace 0000000000000000 ]---

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2023/05/30 17:21 linux-6.1.y d2869ace6eeb df37c7f1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in pskb_expand_head
* Struck through repros no longer work on HEAD.