syzbot


general protection fault in tls_tx_records

Status: fixed on 2019/08/27 17:15
Subsystems: net
[Documentation on labels]
Reported-by: syzbot+97d0cf528b9c8e9be7f4@syzkaller.appspotmail.com
Fix commit: 5d92e631b8be net/tls: partially revert fix transition through disconnect with close
First crash: 1783d, last: 1783d
Discussions (1)
Title Replies (including bot) Last reply
general protection fault in tls_tx_records 1 (2) 2019/08/09 00:19

Sample crash report:
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 12 Comm: kworker/0:1 Not tainted 5.3.0-rc2-next-20190731 #56
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events tx_work_handler
RIP: 0010:tls_tx_records+0x5e/0x740 net/tls/tls_sw.c:365
Code: 80 3c 02 00 0f 85 31 06 00 00 49 8b 87 b0 06 00 00 48 8d 78 28 48 89 45 c0 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 1b 06 00 00 48 8b 45 c0 48 8d 78 60 48 8b 58 28
RSP: 0018:ffff8880a98d7cb0 EFLAGS: 00010206
RAX: dffffc0000000000 RBX: 0000000000000001 RCX: 1ffffffff134c016
RDX: 0000000000000005 RSI: ffffffff862e74fc RDI: 0000000000000028
RBP: ffff8880a98d7d00 R08: ffff8880a98c8300 R09: 0000000000000000
R10: fffffbfff134b9d8 R11: ffff8880a98c8300 R12: ffff88808eb47cc0
R13: ffff8880a9ac4c40 R14: ffff88808eb47de8 R15: ffff8880a9ac4c40
FS:  0000000000000000(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000001b30e80 CR3: 000000009c1a0000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 tx_work_handler+0x134/0x180 net/tls/tls_sw.c:2176
 process_one_work+0x9af/0x1740 kernel/workqueue.c:2269
 worker_thread+0x98/0xe40 kernel/workqueue.c:2415
 kthread+0x361/0x430 kernel/kthread.c:255
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352
Modules linked in:
---[ end trace c75bda97ceb541bf ]---
RIP: 0010:tls_tx_records+0x5e/0x740 net/tls/tls_sw.c:365
Code: 80 3c 02 00 0f 85 31 06 00 00 49 8b 87 b0 06 00 00 48 8d 78 28 48 89 45 c0 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 1b 06 00 00 48 8b 45 c0 48 8d 78 60 48 8b 58 28
RSP: 0018:ffff8880a98d7cb0 EFLAGS: 00010206
RAX: dffffc0000000000 RBX: 0000000000000001 RCX: 1ffffffff134c016
RDX: 0000000000000005 RSI: ffffffff862e74fc RDI: 0000000000000028
RBP: ffff8880a98d7d00 R08: ffff8880a98c8300 R09: 0000000000000000
R10: fffffbfff134b9d8 R11: ffff8880a98c8300 R12: ffff88808eb47cc0
R13: ffff8880a9ac4c40 R14: ffff88808eb47de8 R15: ffff8880a9ac4c40
FS:  0000000000000000(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffd4f4eadac CR3: 00000000987e6000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2019/07/31 18:43 linux-next ce96e791d6a7 c692b5bd .config console log report ci-upstream-linux-next-kasan-gce-root
* Struck through repros no longer work on HEAD.