syzbot


general protection fault in tomoyo_socket_bind_permission

Status: upstream: reported C repro on 2024/07/13 08:21
Subsystems: io-uring
[Documentation on labels]
Reported-by: syzbot+1e811482aa2c70afa9a0@syzkaller.appspotmail.com
Fix commit: ad00e629145b io_uring/net: check socket is valid in io_bind()/io_listen()
Patched on: [ci-qemu-upstream ci-qemu-upstream-386 ci-qemu2-arm32 ci-qemu2-arm64 ci-qemu2-arm64-compat ci-qemu2-arm64-mte ci-upstream-bpf-kasan-gce ci-upstream-bpf-next-kasan-gce ci-upstream-gce-leak ci-upstream-kasan-badwrites-root ci-upstream-kasan-gce ci-upstream-kasan-gce-386 ci-upstream-kasan-gce-root ci-upstream-kasan-gce-selinux-root ci-upstream-kasan-gce-smack-root ci-upstream-kmsan-gce-386-root ci-upstream-kmsan-gce-root ci-upstream-linux-next-kasan-gce-root ci-upstream-net-kasan-gce ci-upstream-net-this-kasan-gce ci2-upstream-fs ci2-upstream-kcsan-gce ci2-upstream-net-next-test-gce], missing on: [ci-qemu-native-arm64-kvm ci-qemu2-riscv64 ci-upstream-gce-arm64 ci2-upstream-usb]
First crash: 23d, last: 5d22h
Discussions (2)
Title Replies (including bot) Last reply
[PATCH] io_uring: Check socket is valid in io_bind()/io_listen() 3 (3) 2024/07/13 12:40
[syzbot] [io-uring] general protection fault in tomoyo_socket_bind_permission 1 (3) 2024/07/13 10:03
Last patch testing requests (1)
Created Duration User Patch Repo Result
2024/07/13 09:29 33m hdanton@sina.com patch https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git 3fe121b62282 OK log

Sample crash report:
Oops: general protection fault, probably for non-canonical address 0xdffffc0000000003: 0000 [#1] PREEMPT SMP KASAN PTI
KASAN: null-ptr-deref in range [0x0000000000000018-0x000000000000001f]
CPU: 0 UID: 0 PID: 5098 Comm: syz-executor321 Not tainted 6.10.0-rc7-next-20240712-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024
RIP: 0010:tomoyo_socket_bind_permission+0xa5/0x340 security/tomoyo/network.c:727
Code: f3 f3 66 43 c7 44 2e 0e f3 f3 e8 e6 e6 2b fd ba 30 00 00 00 48 89 df 31 f6 e8 e7 6f 93 fd 49 8d 5c 24 18 48 89 d8 48 c1 e8 03 <42> 80 3c 28 00 74 08 48 89 df e8 fc 6c 93 fd 48 8b 03 48 89 44 24
RSP: 0018:ffffc9000348f860 EFLAGS: 00010206
RAX: 0000000000000003 RBX: 0000000000000018 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffc9000348f8d0
RBP: ffffc9000348f950 R08: ffffc9000348f8cf R09: 0000000000000000
R10: ffffc9000348f8a0 R11: fffff52000691f1a R12: 0000000000000000
R13: dffffc0000000000 R14: 1ffff92000691f10 R15: ffff88801e82bca0
FS:  000055558d6cc480(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020000000 CR3: 0000000078dee000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 security_socket_bind+0x75/0xb0 security/security.c:4460
 __sys_bind_socket+0x28/0xb0 net/socket.c:1830
 io_bind+0x8f/0x190 io_uring/net.c:1746
 io_issue_sqe+0x3cf/0x1570 io_uring/io_uring.c:1710
 io_queue_sqe io_uring/io_uring.c:1924 [inline]
 io_submit_sqe io_uring/io_uring.c:2180 [inline]
 io_submit_sqes+0xaff/0x1bf0 io_uring/io_uring.c:2295
 __do_sys_io_uring_enter io_uring/io_uring.c:3205 [inline]
 __se_sys_io_uring_enter+0x2d4/0x2670 io_uring/io_uring.c:3142
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f744e4d88f9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 c1 17 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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffc942a3638 EFLAGS: 00000216 ORIG_RAX: 00000000000001aa
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f744e4d88f9
RDX: 0000000000000000 RSI: 0000000000002d3e RDI: 0000000000000003
RBP: 00000000000024fa R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000216 R12: 0000000000000001
R13: 431bde82d7b634db R14: 00007ffc942a3690 R15: 0000000000000001
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:tomoyo_socket_bind_permission+0xa5/0x340 security/tomoyo/network.c:727
Code: f3 f3 66 43 c7 44 2e 0e f3 f3 e8 e6 e6 2b fd ba 30 00 00 00 48 89 df 31 f6 e8 e7 6f 93 fd 49 8d 5c 24 18 48 89 d8 48 c1 e8 03 <42> 80 3c 28 00 74 08 48 89 df e8 fc 6c 93 fd 48 8b 03 48 89 44 24
RSP: 0018:ffffc9000348f860 EFLAGS: 00010206
RAX: 0000000000000003 RBX: 0000000000000018 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffc9000348f8d0
RBP: ffffc9000348f950 R08: ffffc9000348f8cf R09: 0000000000000000
R10: ffffc9000348f8a0 R11: fffff52000691f1a R12: 0000000000000000
R13: dffffc0000000000 R14: 1ffff92000691f10 R15: ffff88801e82bca0
FS:  000055558d6cc480(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020000000 CR3: 0000000078dee000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	f3 f3 66 43 c7 44 2e 	repz xrelease movw $0xf3f3,0xe(%r14,%r13,1)
   7:	0e f3 f3
   a:	e8 e6 e6 2b fd       	call   0xfd2be6f5
   f:	ba 30 00 00 00       	mov    $0x30,%edx
  14:	48 89 df             	mov    %rbx,%rdi
  17:	31 f6                	xor    %esi,%esi
  19:	e8 e7 6f 93 fd       	call   0xfd937005
  1e:	49 8d 5c 24 18       	lea    0x18(%r12),%rbx
  23:	48 89 d8             	mov    %rbx,%rax
  26:	48 c1 e8 03          	shr    $0x3,%rax
* 2a:	42 80 3c 28 00       	cmpb   $0x0,(%rax,%r13,1) <-- trapping instruction
  2f:	74 08                	je     0x39
  31:	48 89 df             	mov    %rbx,%rdi
  34:	e8 fc 6c 93 fd       	call   0xfd936d35
  39:	48 8b 03             	mov    (%rbx),%rax
  3c:	48                   	rex.W
  3d:	89                   	.byte 0x89
  3e:	44                   	rex.R
  3f:	24                   	.byte 0x24

Crashes (4):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/07/13 08:21 linux-next 3fe121b62282 eaeb5c15 .config strace log report syz / log C [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root general protection fault in tomoyo_socket_bind_permission
2024/06/26 00:02 linux-next 62c97045b8f7 da0bd5ca .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root general protection fault in tomoyo_socket_bind_permission
2024/06/25 23:52 linux-next 62c97045b8f7 da0bd5ca .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root general protection fault in tomoyo_socket_bind_permission
2024/06/25 23:52 linux-next 62c97045b8f7 da0bd5ca .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root general protection fault in tomoyo_socket_bind_permission
* Struck through repros no longer work on HEAD.