syzbot


WARNING in do_proc_bulk

Status: fixed on 2021/11/10 00:50
Reported-by: syzbot+882a85c0c8ec4a3e2281@syzkaller.appspotmail.com
Fix commit: 4f2629ea67e7 USB: usbfs: Don't WARN about excessively large memory allocations
First crash: 647d, last: 643d

Cause bisection: the issue happens on the oldest tested release (bisect log)
Crash: WARNING in proc_bulk (log)
Repro: C syz .config
Last patch testing requests:
Created Duration User Patch Repo Result
2021/05/04 00:47 18m stern@rowland.harvard.edu patch https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git d2b6f8a1 OK

Sample crash report:
usb usb9: usbfs: process 8586 (syz-executor862) did not claim interface 0 before use
------------[ cut here ]------------
WARNING: CPU: 1 PID: 8586 at mm/page_alloc.c:4985 __alloc_pages_nodemask+0x5fd/0x730 mm/page_alloc.c:5020
Modules linked in:
CPU: 0 PID: 8586 Comm: syz-executor862 Not tainted 5.12.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:__alloc_pages_nodemask+0x5fd/0x730 mm/page_alloc.c:4985
Code: 00 00 0c 00 0f 85 a7 00 00 00 8b 3c 24 4c 89 f2 44 89 e6 c6 44 24 70 00 48 89 6c 24 58 e8 9b d7 ff ff 49 89 c5 e9 e5 fc ff ff <0f> 0b e9 b0 fd ff ff 89 74 24 14 4c 89 4c 24 08 4c 89 74 24 18 e8
RSP: 0018:ffffc90001f57a30 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 1ffff920003eaf4a RCX: 0000000000000000
RDX: 0000000000000000 RSI: dffffc0000000000 RDI: 0000000000040cc0
RBP: 0000000000040cc0 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffff81b51b41 R11: 0000000000000000 R12: 000000000000000b
R13: 000000000000000b R14: 0000000000000000 R15: 0000000000554e47
FS:  0000000002293300(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fd2526f7008 CR3: 000000001d80b000 CR4: 00000000001506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 alloc_pages_current+0x18c/0x2a0 mm/mempolicy.c:2277
 alloc_pages include/linux/gfp.h:561 [inline]
 kmalloc_order+0x34/0xf0 mm/slab_common.c:906
 kmalloc_order_trace+0x14/0x130 mm/slab_common.c:922
 kmalloc include/linux/slab.h:561 [inline]
 do_proc_bulk+0x2d4/0x750 drivers/usb/core/devio.c:1221
 proc_bulk drivers/usb/core/devio.c:1268 [inline]
 usbdev_do_ioctl drivers/usb/core/devio.c:2542 [inline]
 usbdev_ioctl+0x586/0x36c0 drivers/usb/core/devio.c:2708
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:1069 [inline]
 __se_sys_ioctl fs/ioctl.c:1055 [inline]
 __x64_sys_ioctl+0x193/0x200 fs/ioctl.c:1055
 do_syscall_64+0x3a/0xb0 arch/x86/entry/common.c:47
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x4450c9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 a1 15 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 c0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00000000005cfd98 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00000000004450c9
RDX: 0000000020000240 RSI: 00000000c0185502 RDI: 0000000000000004
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000005 R11: 0000000000000246 R12: 00000000005cfdcc
R13: 00000000005cfe00 R14: 00000000005cfde0 R15: 0000000000000005

Crashes (3):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets Title
ci-upstream-kasan-gce 2021/05/03 10:24 upstream d2b6f8a17919 77e2b668 .config console log report syz C WARNING in do_proc_bulk
ci-upstream-kasan-gce 2021/05/03 08:23 upstream d2b6f8a17919 77e2b668 .config console log report info WARNING in do_proc_bulk
ci-upstream-kasan-gce 2021/04/28 19:49 upstream acd3d2859453 77e2b668 .config console log report info WARNING in do_proc_bulk
* Struck through repros no longer work on HEAD.