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Message-ID: <000000000000e7b62806096c7d67@google.com>
Date: Sun, 05 Nov 2023 11:10:33 -0800
From: syzbot <syzbot+8a78ecea7ac1a2ea26e5@...kaller.appspotmail.com>
To: davem@...emloft.net, linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
reibax@...il.com, richardcochran@...il.com, rrameshbabu@...dia.com,
syzkaller-bugs@...glegroups.com
Subject: [syzbot] [net?] general protection fault in ptp_ioctl
Hello,
syzbot found the following issue on:
HEAD commit: 4652b8e4f3ff Merge tag '6.7-rc-ksmbd-server-fixes' of git:..
git tree: upstream
console+strace: https://syzkaller.appspot.com/x/log.txt?x=11aa125f680000
kernel config: https://syzkaller.appspot.com/x/.config?x=423e70610024fd6b
dashboard link: https://syzkaller.appspot.com/bug?extid=8a78ecea7ac1a2ea26e5
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=16193ef7680000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=17e035d7680000
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/a9cb6d5a8c4b/disk-4652b8e4.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/363795681962/vmlinux-4652b8e4.xz
kernel image: https://storage.googleapis.com/syzbot-assets/113d96b73fef/bzImage-4652b8e4.xz
The issue was bisected to:
commit c5a445b1e9347b14752b01f1a304bd7a2f260acc
Author: Xabier Marquiegui <reibax@...il.com>
Date: Wed Oct 11 22:39:56 2023 +0000
ptp: support event queue reader channel masks
bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=122491ef680000
final oops: https://syzkaller.appspot.com/x/report.txt?x=112491ef680000
console output: https://syzkaller.appspot.com/x/log.txt?x=162491ef680000
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+8a78ecea7ac1a2ea26e5@...kaller.appspotmail.com
Fixes: c5a445b1e934 ("ptp: support event queue reader channel masks")
general protection fault, probably for non-canonical address 0xdffffc000000020b: 0000 [#1] PREEMPT SMP KASAN
KASAN: probably user-memory-access in range [0x0000000000001058-0x000000000000105f]
CPU: 0 PID: 5053 Comm: syz-executor353 Not tainted 6.6.0-syzkaller-10396-g4652b8e4f3ff #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023
RIP: 0010:ptp_ioctl+0xcb7/0x1d10 drivers/ptp/ptp_chardev.c:476
Code: 81 fe 13 3d 00 00 0f 85 9c 02 00 00 e8 c2 83 23 fa 49 8d bc 24 58 10 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 dc 0e 00 00 49 8b bc 24 58 10 00 00 ba 00 01 00
RSP: 0018:ffffc90003a37ba0 EFLAGS: 00010212
RAX: dffffc0000000000 RBX: ffff88814a78a000 RCX: ffffffff8764f81f
RDX: 000000000000020b RSI: ffffffff8765028e RDI: 0000000000001058
RBP: ffffc90003a37ec0 R08: 0000000000000005 R09: ffffc90003a37c40
R10: 0000000000003d13 R11: 0000000000000000 R12: 0000000000000000
R13: ffffc90003a37c80 R14: 0000000000003d13 R15: ffffffff92ac78e8
FS: 00005555569a9380(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020000040 CR3: 0000000076e09000 CR4: 0000000000350ef0
Call Trace:
<TASK>
posix_clock_ioctl+0xf8/0x160 kernel/time/posix-clock.c:86
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:871 [inline]
__se_sys_ioctl fs/ioctl.c:857 [inline]
__x64_sys_ioctl+0x18f/0x210 fs/ioctl.c:857
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+0x63/0x6b
RIP: 0033:0x7f710ac4a2a9
Code: 48 83 c4 28 c3 e8 37 17 00 00 0f 1f 80 00 00 00 00 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:00007ffda288c4c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007ffda288c698 RCX: 00007f710ac4a2a9
RDX: 0000000000000000 RSI: 0000000000003d13 RDI: 0000000000000003
RBP: 00007f710acbd610 R08: 00007ffda288c698 R09: 00007ffda288c698
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 00007ffda288c688 R14: 0000000000000001 R15: 0000000000000001
</TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:ptp_ioctl+0xcb7/0x1d10 drivers/ptp/ptp_chardev.c:476
Code: 81 fe 13 3d 00 00 0f 85 9c 02 00 00 e8 c2 83 23 fa 49 8d bc 24 58 10 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 dc 0e 00 00 49 8b bc 24 58 10 00 00 ba 00 01 00
RSP: 0018:ffffc90003a37ba0 EFLAGS: 00010212
RAX: dffffc0000000000 RBX: ffff88814a78a000 RCX: ffffffff8764f81f
RDX: 000000000000020b RSI: ffffffff8765028e RDI: 0000000000001058
RBP: ffffc90003a37ec0 R08: 0000000000000005 R09: ffffc90003a37c40
R10: 0000000000003d13 R11: 0000000000000000 R12: 0000000000000000
R13: ffffc90003a37c80 R14: 0000000000003d13 R15: ffffffff92ac78e8
FS: 00005555569a9380(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000005fdeb8 CR3: 0000000076e09000 CR4: 0000000000350ef0
----------------
Code disassembly (best guess):
0: 81 fe 13 3d 00 00 cmp $0x3d13,%esi
6: 0f 85 9c 02 00 00 jne 0x2a8
c: e8 c2 83 23 fa call 0xfa2383d3
11: 49 8d bc 24 58 10 00 lea 0x1058(%r12),%rdi
18: 00
19: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax
20: fc ff df
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 dc 0e 00 00 jne 0xf10
34: 49 8b bc 24 58 10 00 mov 0x1058(%r12),%rdi
3b: 00
3c: ba .byte 0xba
3d: 00 01 add %al,(%rcx)
---
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.
For information about bisection process see: https://goo.gl/tpsmEJ#bisection
If the report is already addressed, 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 report's subsystems, reply with:
#syz set subsystems: new-subsystem
(See the list of subsystem names on the web dashboard)
If the report is a duplicate of another one, reply with:
#syz dup: exact-subject-of-another-report
If you want to undo deduplication, reply with:
#syz undup
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