syzbot has found a reproducer for the following issue on: HEAD commit: 8d67041228ac Merge tag 'linux-can-fixes-for-5.14-20210730'.. git tree: net console output: https://syzkaller.appspot.com/x/log.txt?x=17a6e966300000 kernel config: https://syzkaller.appspot.com/x/.config?x=42748795a8952874 dashboard link: https://syzkaller.appspot.com/bug?extid=29c3c12f3214b85ad081 compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.1 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=11c631b2300000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1519451e300000 The issue was bisected to: commit 997acaf6b4b59c6a9c259740312a69ea549cc684 Author: Mark Rutland <mark.rutland@xxxxxxx> Date: Mon Jan 11 15:37:07 2021 +0000 lockdep: report broken irq restoration bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=11a85786d00000 final oops: https://syzkaller.appspot.com/x/report.txt?x=13a85786d00000 console output: https://syzkaller.appspot.com/x/log.txt?x=15a85786d00000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+29c3c12f3214b85ad081@xxxxxxxxxxxxxxxxxxxxxxxxx Fixes: 997acaf6b4b5 ("lockdep: report broken irq restoration") general protection fault, probably for non-canonical address 0xdffffc0000000002: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000010-0x0000000000000017] CPU: 0 PID: 9805 Comm: syz-executor059 Not tainted 5.14.0-rc2-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:tls_sk_proto_close+0xd8/0xaf0 net/tls/tls_main.c:304 Code: 02 00 0f 85 16 09 00 00 48 8b 85 f0 02 00 00 4d 8d 6c 24 14 4c 89 ea 48 c1 ea 03 48 89 44 24 18 48 b8 00 00 00 00 00 fc ff df <0f> b6 04 02 4c 89 ea 83 e2 07 38 d0 7f 08 84 c0 0f 85 4f 07 00 00 RSP: 0018:ffffc9000afffc60 EFLAGS: 00010203 RAX: dffffc0000000000 RBX: dffffc0000000000 RCX: 0000000000000000 RDX: 0000000000000002 RSI: ffffffff87c151d3 RDI: ffff888147a24170 RBP: ffff888147a23e80 R08: 0000000000000001 R09: 00000000fffffff0 R10: ffffffff87c15461 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000014 R14: ffff88803d517908 R15: 0000000000000001 FS: 000000000076f400(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fb379600000 CR3: 000000003d560000 CR4: 00000000001506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: tls_sk_proto_close+0x356/0xaf0 net/tls/tls_main.c:327 inet_release+0x12e/0x280 net/ipv4/af_inet.c:431 inet6_release+0x4c/0x70 net/ipv6/af_inet6.c:478 __sock_release+0xcd/0x280 net/socket.c:648 sock_close+0x18/0x20 net/socket.c:1300 __fput+0x288/0x920 fs/file_table.c:280 task_work_run+0xdd/0x1a0 kernel/task_work.c:164 tracehook_notify_resume include/linux/tracehook.h:189 [inline] exit_to_user_mode_loop kernel/entry/common.c:175 [inline] exit_to_user_mode_prepare+0x27e/0x290 kernel/entry/common.c:209 __syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline] syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:302 do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x40c81b Code: 0f 05 48 3d 00 f0 ff ff 77 45 c3 0f 1f 40 00 48 83 ec 18 89 7c 24 0c e8 63 fc ff ff 8b 7c 24 0c 41 89 c0 b8 03 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 35 44 89 c7 89 44 24 0c e8 a1 fc ff ff 8b 44 RSP: 002b:00007fffc346f8f0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000006 RCX: 000000000040c81b RDX: 0000000000000000 RSI: 0000000000000080 RDI: 0000000000000005 RBP: 00000000000149a5 R08: 0000000000000000 R09: 0000000000000000 R10: 00007fffc346f940 R11: 0000000000000293 R12: 00007fffc346f940 R13: 00007fffc346f960 R14: 0000000000405060 R15: 00007fffc346f9d0 Modules linked in: ---[ end trace 6a958f78622ad753 ]--- RIP: 0010:tls_sk_proto_close+0xd8/0xaf0 net/tls/tls_main.c:304 Code: 02 00 0f 85 16 09 00 00 48 8b 85 f0 02 00 00 4d 8d 6c 24 14 4c 89 ea 48 c1 ea 03 48 89 44 24 18 48 b8 00 00 00 00 00 fc ff df <0f> b6 04 02 4c 89 ea 83 e2 07 38 d0 7f 08 84 c0 0f 85 4f 07 00 00 RSP: 0018:ffffc9000afffc60 EFLAGS: 00010203 RAX: dffffc0000000000 RBX: dffffc0000000000 RCX: 0000000000000000 RDX: 0000000000000002 RSI: ffffffff87c151d3 RDI: ffff888147a24170 RBP: ffff888147a23e80 R08: 0000000000000001 R09: 00000000fffffff0 R10: ffffffff87c15461 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000014 R14: ffff88803d517908 R15: 0000000000000001 FS: 000000000076f400(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fb379600000 CR3: 000000003d560000 CR4: 00000000001506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
