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Message-ID: <000000000000347a250608e8a4d1@google.com> Date: Sun, 29 Oct 2023 22:52:20 -0700 From: syzbot <syzbot+40d43509a099ea756317@...kaller.appspotmail.com> To: borisp@...dia.com, davem@...emloft.net, edumazet@...gle.com, john.fastabend@...il.com, kuba@...nel.org, linux-kernel@...r.kernel.org, netdev@...r.kernel.org, pabeni@...hat.com, syzkaller-bugs@...glegroups.com Subject: [syzbot] [net?] general protection fault in tls_merge_open_record Hello, syzbot found the following issue on: HEAD commit: 66f1e1ea3548 Add linux-next specific files for 20231027 git tree: linux-next console output: https://syzkaller.appspot.com/x/log.txt?x=11b621fd680000 kernel config: https://syzkaller.appspot.com/x/.config?x=2911330219149de4 dashboard link: https://syzkaller.appspot.com/bug?extid=40d43509a099ea756317 compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1552332d680000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/e0bf12f215f2/disk-66f1e1ea.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/5e854ca6e2c3/vmlinux-66f1e1ea.xz kernel image: https://storage.googleapis.com/syzbot-assets/25e8c098714e/bzImage-66f1e1ea.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+40d43509a099ea756317@...kaller.appspotmail.com general protection fault, probably for non-canonical address 0xdffffc0000000001: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f] CPU: 1 PID: 12569 Comm: syz-executor.0 Not tainted 6.6.0-rc7-next-20231027-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023 RIP: 0010:_compound_head include/linux/page-flags.h:247 [inline] RIP: 0010:put_page include/linux/mm.h:1544 [inline] RIP: 0010:tls_merge_open_record+0x4b9/0x7f0 net/tls/tls_sw.c:669 Code: 85 e4 0f 85 b6 02 00 00 e8 54 62 67 f8 4d 89 f4 48 b8 00 00 00 00 00 fc ff df 49 83 e4 fc 49 8d 7c 24 08 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 ed 02 00 00 4d 8b 6c 24 08 31 ff 4d 89 ef 41 83 RSP: 0018:ffffc9000ae9f498 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: ffff888068caa000 RCX: ffffffff89219a8e RDX: 0000000000000001 RSI: ffffffff89219a9c RDI: 0000000000000008 RBP: ffff888068cab000 R08: 0000000000000007 R09: 0000000000000000 R10: 0000000000000000 R11: ffffffff81dfefa3 R12: 0000000000000000 R13: 0000000000000020 R14: 0000000000000000 R15: 0000000000000000 FS: 00007fa3e0ea76c0(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020173000 CR3: 00000000279dd000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> tls_push_record+0x290f/0x3070 net/tls/tls_sw.c:726 bpf_exec_tx_verdict+0xdee/0x1230 net/tls/tls_sw.c:819 tls_sw_splice_eof+0x194/0x470 net/tls/tls_sw.c:1242 sock_splice_eof+0x86/0xb0 net/socket.c:1116 direct_file_splice_eof+0x86/0xb0 fs/splice.c:1151 do_splice_eof fs/splice.c:944 [inline] splice_direct_to_actor+0x710/0xa30 fs/splice.c:1117 do_splice_direct+0x1af/0x280 fs/splice.c:1194 do_sendfile+0xb3a/0x1310 fs/read_write.c:1254 __do_sys_sendfile64 fs/read_write.c:1322 [inline] __se_sys_sendfile64 fs/read_write.c:1308 [inline] __x64_sys_sendfile64+0x1d6/0x220 fs/read_write.c:1308 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x3f/0x110 arch/x86/entry/common.c:82 entry_SYSCALL_64_after_hwframe+0x62/0x6a RIP: 0033:0x7fa3e007cae9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fa3e0ea70c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 RAX: ffffffffffffffda RBX: 00007fa3e019c050 RCX: 00007fa3e007cae9 RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000003 RBP: 00007fa3e00c847a R08: 0000000000000000 R09: 0000000000000000 R10: 00000000f2090293 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007fa3e019c050 R15: 00007ffcc0dbba98 </TASK> Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:_compound_head include/linux/page-flags.h:247 [inline] RIP: 0010:put_page include/linux/mm.h:1544 [inline] RIP: 0010:tls_merge_open_record+0x4b9/0x7f0 net/tls/tls_sw.c:669 Code: 85 e4 0f 85 b6 02 00 00 e8 54 62 67 f8 4d 89 f4 48 b8 00 00 00 00 00 fc ff df 49 83 e4 fc 49 8d 7c 24 08 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 ed 02 00 00 4d 8b 6c 24 08 31 ff 4d 89 ef 41 83 RSP: 0018:ffffc9000ae9f498 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: ffff888068caa000 RCX: ffffffff89219a8e RDX: 0000000000000001 RSI: ffffffff89219a9c RDI: 0000000000000008 RBP: ffff888068cab000 R08: 0000000000000007 R09: 0000000000000000 R10: 0000000000000000 R11: ffffffff81dfefa3 R12: 0000000000000000 R13: 0000000000000020 R14: 0000000000000000 R15: 0000000000000000 FS: 00007fa3e0ea76c0(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020347000 CR3: 00000000279dd000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 85 e4 test %esp,%esp 2: 0f 85 b6 02 00 00 jne 0x2be 8: e8 54 62 67 f8 call 0xf8676261 d: 4d 89 f4 mov %r14,%r12 10: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 17: fc ff df 1a: 49 83 e4 fc and $0xfffffffffffffffc,%r12 1e: 49 8d 7c 24 08 lea 0x8(%r12),%rdi 23: 48 89 fa mov %rdi,%rdx 26: 48 c1 ea 03 shr $0x3,%rdx * 2a: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) <-- trapping instruction 2e: 0f 85 ed 02 00 00 jne 0x321 34: 4d 8b 6c 24 08 mov 0x8(%r12),%r13 39: 31 ff xor %edi,%edi 3b: 4d 89 ef mov %r13,%r15 3e: 41 rex.B 3f: 83 .byte 0x83 --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@...glegroups.com. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the bug is already fixed, let syzbot know by replying with: #syz fix: exact-commit-title If you want syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing. If you want to overwrite bug's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the bug is a duplicate of another bug, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup
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