Messages in this thread | | | Date | Sun, 05 Nov 2023 11:10:33 -0800 | Subject | [syzbot] [net?] general protection fault in ptp_ioctl | From | syzbot <> |
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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@gmail.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@syzkaller.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)
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