syzbot


BUG: bad usercopy in do_handle_open

Status: upstream: reported C repro on 2024/04/05 17:40
Subsystems: hardening mm
[Documentation on labels]
Reported-by: syzbot+4372e026c95b0e36d0ee@syzkaller.appspotmail.com
First crash: 49d, last: 47d
Discussions (1)
Title Replies (including bot) Last reply
[syzbot] [mm?] [hardening?] BUG: bad usercopy in do_handle_open 2 (3) 2024/04/05 18:21
Last patch testing requests (2)
Created Duration User Patch Repo Result
2024/04/21 00:43 21m retest repro linux-next error OK
2024/04/02 18:04 1h12m zokeefe@google.com https://prodkernel.git.corp.google.com/kernel/release/11xx next error OK

Sample crash report:
usercopy: Kernel memory overwrite attempt detected to SLUB object 'kmalloc-16' (offset 8, size 9)!
------------[ cut here ]------------
kernel BUG at mm/usercopy.c:102!
Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN PTI
CPU: 1 PID: 5081 Comm: syz-executor249 Not tainted 6.9.0-rc2-next-20240402-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
RIP: 0010:usercopy_abort+0x84/0x90 mm/usercopy.c:102
Code: 49 89 ce 48 c7 c3 e0 27 d8 8b 48 0f 44 de 48 c7 c7 80 26 d8 8b 4c 89 de 48 89 c1 41 52 41 56 53 e8 b1 6f 75 09 48 83 c4 18 90 <0f> 0b 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc90003dbfd78 EFLAGS: 00010286
RAX: 0000000000000062 RBX: ffffffff8bd827e0 RCX: 2b2ecef8eabe4800
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: 0000000000000008 R08: ffffffff81760b9c R09: 1ffff920007b7f4c
R10: dffffc0000000000 R11: fffff520007b7f4d R12: ffffea00008fe840
R13: 0000000000000009 R14: 0000000000000008 R15: 0000000000000009
FS:  000055556aa78380(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020000040 CR3: 0000000076e74000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __check_heap_object+0xb1/0x100 mm/slub.c:5461
 check_heap_object mm/usercopy.c:196 [inline]
 __check_object_size+0x1e3/0x900 mm/usercopy.c:251
 check_object_size include/linux/thread_info.h:215 [inline]
 check_copy_size include/linux/thread_info.h:251 [inline]
 copy_from_user include/linux/uaccess.h:182 [inline]
 handle_to_path fs/fhandle.c:203 [inline]
 do_handle_open+0x1f6/0x660 fs/fhandle.c:226
 do_syscall_64+0xfb/0x240
 entry_SYSCALL_64_after_hwframe+0x72/0x7a
RIP: 0033:0x7f27665352a9
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:00007ffe7e4589d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000130
RAX: ffffffffffffffda RBX: 00007ffe7e458bb8 RCX: 00007f27665352a9
RDX: 0000000000000000 RSI: 0000000020000040 RDI: 00000000ffffffff
RBP: 00007f27665a8610 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 0000000000000001
R13: 00007ffe7e458ba8 R14: 0000000000000001 R15: 0000000000000001
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:usercopy_abort+0x84/0x90 mm/usercopy.c:102
Code: 49 89 ce 48 c7 c3 e0 27 d8 8b 48 0f 44 de 48 c7 c7 80 26 d8 8b 4c 89 de 48 89 c1 41 52 41 56 53 e8 b1 6f 75 09 48 83 c4 18 90 <0f> 0b 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc90003dbfd78 EFLAGS: 00010286
RAX: 0000000000000062 RBX: ffffffff8bd827e0 RCX: 2b2ecef8eabe4800
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: 0000000000000008 R08: ffffffff81760b9c R09: 1ffff920007b7f4c
R10: dffffc0000000000 R11: fffff520007b7f4d R12: ffffea00008fe840
R13: 0000000000000009 R14: 0000000000000008 R15: 0000000000000009
FS:  000055556aa78380(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020000040 CR3: 0000000076e74000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400

Crashes (446):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/04/02 07:44 linux-next c0b832517f62 6baf5069 .config strace log report syz C [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root BUG: bad usercopy in do_handle_open
2024/04/04 11:06 linux-next 727900b675b7 51c4dcff .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root BUG: bad usercopy in do_handle_open
2024/04/04 10:35 linux-next 727900b675b7 51c4dcff .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root BUG: bad usercopy in do_handle_open
2024/04/04 09:12 linux-next 727900b675b7 51c4dcff .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root BUG: bad usercopy in do_handle_open
2024/04/04 08:18 linux-next 727900b675b7 51c4dcff .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root BUG: bad usercopy in do_handle_open
2024/04/04 07:13 linux-next 727900b675b7 51c4dcff .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root BUG: bad usercopy in do_handle_open
2024/04/04 07:13 linux-next 727900b675b7 51c4dcff .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root BUG: bad usercopy in do_handle_open
2024/04/04 06:09 linux-next 727900b675b7 51c4dcff .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root BUG: bad usercopy in do_handle_open
2024/04/04 05:05 linux-next 727900b675b7 51c4dcff .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root BUG: bad usercopy in do_handle_open
2024/04/04 04:08 linux-next 727900b675b7 51c4dcff .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root BUG: bad usercopy in do_handle_open
2024/04/04 02:42 linux-next 727900b675b7 51c4dcff .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root BUG: bad usercopy in do_handle_open
2024/04/04 00:36 linux-next 727900b675b7 fed899ed .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root BUG: bad usercopy in do_handle_open
2024/04/04 00:30 linux-next 727900b675b7 fed899ed .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root BUG: bad usercopy in do_handle_open
2024/04/03 23:28 linux-next 727900b675b7 fed899ed .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root BUG: bad usercopy in do_handle_open
2024/04/03 22:18 linux-next 727900b675b7 fed899ed .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root BUG: bad usercopy in do_handle_open
2024/04/03 21:12 linux-next 727900b675b7 fed899ed .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root BUG: bad usercopy in do_handle_open
2024/04/03 20:49 linux-next 727900b675b7 fed899ed .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root BUG: bad usercopy in do_handle_open
2024/04/03 19:45 linux-next 727900b675b7 fed899ed .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root BUG: bad usercopy in do_handle_open
2024/04/03 18:34 linux-next 727900b675b7 fed899ed .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root BUG: bad usercopy in do_handle_open
2024/04/03 18:28 linux-next 727900b675b7 fed899ed .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root BUG: bad usercopy in do_handle_open
2024/04/03 17:07 linux-next 727900b675b7 fed899ed .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root BUG: bad usercopy in do_handle_open
2024/04/03 16:05 linux-next 727900b675b7 fed899ed .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root BUG: bad usercopy in do_handle_open
2024/04/03 13:57 linux-next 727900b675b7 fed899ed .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root BUG: bad usercopy in do_handle_open
2024/04/03 11:44 linux-next c0b832517f62 7925100d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root BUG: bad usercopy in do_handle_open
2024/04/03 10:43 linux-next c0b832517f62 7925100d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root BUG: bad usercopy in do_handle_open
2024/04/03 09:34 linux-next c0b832517f62 7925100d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root BUG: bad usercopy in do_handle_open
2024/04/03 08:55 linux-next c0b832517f62 7925100d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root BUG: bad usercopy in do_handle_open
2024/04/03 07:50 linux-next c0b832517f62 7925100d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root BUG: bad usercopy in do_handle_open
2024/04/03 06:46 linux-next c0b832517f62 7925100d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root BUG: bad usercopy in do_handle_open
2024/04/03 05:38 linux-next c0b832517f62 7925100d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root BUG: bad usercopy in do_handle_open
2024/04/03 04:39 linux-next c0b832517f62 7925100d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root BUG: bad usercopy in do_handle_open
2024/04/03 03:37 linux-next c0b832517f62 7925100d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root BUG: bad usercopy in do_handle_open
2024/04/03 02:12 linux-next c0b832517f62 7925100d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root BUG: bad usercopy in do_handle_open
2024/04/03 01:41 linux-next c0b832517f62 7925100d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root BUG: bad usercopy in do_handle_open
2024/04/03 00:38 linux-next c0b832517f62 7925100d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root BUG: bad usercopy in do_handle_open
2024/04/03 00:22 linux-next c0b832517f62 7925100d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root BUG: bad usercopy in do_handle_open
2024/04/02 23:11 linux-next c0b832517f62 7925100d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root BUG: bad usercopy in do_handle_open
2024/04/02 21:03 linux-next c0b832517f62 6baf5069 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root BUG: bad usercopy in do_handle_open
2024/04/02 20:28 linux-next c0b832517f62 6baf5069 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root BUG: bad usercopy in do_handle_open
2024/04/02 19:13 linux-next c0b832517f62 6baf5069 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root BUG: bad usercopy in do_handle_open
2024/04/02 18:31 linux-next c0b832517f62 6baf5069 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root BUG: bad usercopy in do_handle_open
2024/04/02 17:28 linux-next c0b832517f62 6baf5069 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root BUG: bad usercopy in do_handle_open
2024/04/02 16:28 linux-next c0b832517f62 6baf5069 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root BUG: bad usercopy in do_handle_open
* Struck through repros no longer work on HEAD.