Re: [syzbot] KASAN: slab-out-of-bounds Write in usb_hcd_poll_rh_status (2)

From: syzbot
Date: Fri Dec 31 2021 - 12:44:13 EST

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In reply to: Alan Stern: "Re: [syzbot] KASAN: slab-out-of-bounds Write in usb_hcd_poll_rh_status (2)"
Next in thread: Alan Stern: "Re: [syzbot] KASAN: slab-out-of-bounds Write in usb_hcd_poll_rh_status (2)"
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Hello,

syzbot has tested the proposed patch but the reproducer is still triggering an issue:
KASAN: slab-out-of-bounds Write in usb_hcd_poll_rh_status

vhci_hcd vhci_hcd.0: poll_rh_status: len 2 maxch 0 tblen 1
==================================================================
BUG: KASAN: slab-out-of-bounds in memcpy include/linux/fortify-string.h:225 [inline]
BUG: KASAN: slab-out-of-bounds in usb_hcd_poll_rh_status+0x5f4/0x780 drivers/usb/core/hcd.c:776
Write of size 2 at addr ffff88801da403c0 by task syz-executor133/4062

CPU: 1 PID: 4062 Comm: syz-executor133 Not tainted 5.16.0-rc7-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
<IRQ>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106
print_address_description.constprop.0.cold+0x8d/0x320 mm/kasan/report.c:247
__kasan_report mm/kasan/report.c:433 [inline]
kasan_report.cold+0x83/0xdf mm/kasan/report.c:450
check_region_inline mm/kasan/generic.c:183 [inline]
kasan_check_range+0x13d/0x180 mm/kasan/generic.c:189
memcpy+0x39/0x60 mm/kasan/shadow.c:66
memcpy include/linux/fortify-string.h:225 [inline]
usb_hcd_poll_rh_status+0x5f4/0x780 drivers/usb/core/hcd.c:776
call_timer_fn+0x1a5/0x6b0 kernel/time/timer.c:1421
expire_timers kernel/time/timer.c:1466 [inline]
__run_timers.part.0+0x67c/0xa30 kernel/time/timer.c:1734
__run_timers kernel/time/timer.c:1715 [inline]
run_timer_softirq+0xb3/0x1d0 kernel/time/timer.c:1747
__do_softirq+0x29b/0x9c2 kernel/softirq.c:558
invoke_softirq kernel/softirq.c:432 [inline]
__irq_exit_rcu+0x123/0x180 kernel/softirq.c:637
irq_exit_rcu+0x5/0x20 kernel/softirq.c:649
sysvec_apic_timer_interrupt+0x93/0xc0 arch/x86/kernel/apic/apic.c:1097
</IRQ>
<TASK>
asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0x38/0x70 kernel/locking/spinlock.c:194
Code: 74 24 10 e8 ca db 15 f8 48 89 ef e8 82 51 16 f8 81 e3 00 02 00 00 75 25 9c 58 f6 c4 02 75 2d 48 85 db 74 01 fb bf 01 00 00 00 <e8> c3 1b 09 f8 65 8b 05 dc a0 bb 76 85 c0 74 0a 5b 5d c3 e8 f0 02
RSP: 0018:ffffc9000289f8b0 EFLAGS: 00000206
RAX: 0000000000000002 RBX: 0000000000000200 RCX: 1ffffffff1b22579
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000001
RBP: ffffffff8ca3bc60 R08: 0000000000000001 R09: 0000000000000001
R10: ffffffff817dd258 R11: 0000000000000000 R12: ffff88801d9a7d40
R13: ffff888147c88000 R14: ffff888147c88180 R15: 0000000000000000
spin_unlock_irqrestore include/linux/spinlock.h:404 [inline]
rh_queue_status drivers/usb/core/hcd.c:836 [inline]
rh_urb_enqueue drivers/usb/core/hcd.c:843 [inline]
usb_hcd_submit_urb+0x15ac/0x2390 drivers/usb/core/hcd.c:1548
usb_submit_urb+0x86d/0x18a0 drivers/usb/core/urb.c:594
usbfs_start_wait_urb+0x128/0x3d0 drivers/usb/core/devio.c:1125
do_proc_bulk+0x535/0xba0 drivers/usb/core/devio.c:1313
proc_bulk drivers/usb/core/devio.c:1351 [inline]
usbdev_do_ioctl drivers/usb/core/devio.c:2625 [inline]
usbdev_ioctl+0x586/0x36c0 drivers/usb/core/devio.c:2791
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:874 [inline]
__se_sys_ioctl fs/ioctl.c:860 [inline]
__x64_sys_ioctl+0x193/0x200 fs/ioctl.c:860
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7fecb7004799
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 14 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:00007fffb13c1078 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fecb7048098 RCX: 00007fecb7004799
RDX: 0000000020000240 RSI: 00000000c0185502 RDI: 0000000000000006
RBP: 00007fffb13c10a0 R08: 00007fffb13c0af0 R09: 0000000000000000
R10: 000000000000ffff R11: 0000000000000246 R12: 00007fecb6fc3770
R13: 0000000000000000 R14: 00007fffb13c10a0 R15: 00007fffb13c1090
</TASK>

Allocated by task 4062:
kasan_save_stack+0x1e/0x50 mm/kasan/common.c:38
kasan_set_track mm/kasan/common.c:46 [inline]
set_alloc_info mm/kasan/common.c:434 [inline]
____kasan_kmalloc mm/kasan/common.c:513 [inline]
____kasan_kmalloc mm/kasan/common.c:472 [inline]
__kasan_kmalloc+0xa9/0xd0 mm/kasan/common.c:522
kmalloc include/linux/slab.h:595 [inline]
do_proc_bulk+0x2fc/0xba0 drivers/usb/core/devio.c:1292
proc_bulk drivers/usb/core/devio.c:1351 [inline]
usbdev_do_ioctl drivers/usb/core/devio.c:2625 [inline]
usbdev_ioctl+0x586/0x36c0 drivers/usb/core/devio.c:2791
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:874 [inline]
__se_sys_ioctl fs/ioctl.c:860 [inline]
__x64_sys_ioctl+0x193/0x200 fs/ioctl.c:860
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae

The buggy address belongs to the object at ffff88801da403c0
which belongs to the cache kmalloc-8 of size 8
The buggy address is located 0 bytes inside of
8-byte region [ffff88801da403c0, ffff88801da403c8)
The buggy address belongs to the page:
page:ffffea0000769000 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1da40
flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000200 dead000000000100 dead000000000122 ffff888010c41280
raw: 0000000000000000 0000000080660066 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Unmovable, gfp_mask 0x12cc0(GFP_KERNEL|__GFP_NOWARN|__GFP_NORETRY), pid 2973, ts 21401832644, free_ts 18932450065
prep_new_page mm/page_alloc.c:2418 [inline]
get_page_from_freelist+0xa72/0x2f50 mm/page_alloc.c:4149
__alloc_pages+0x1b2/0x500 mm/page_alloc.c:5369
alloc_pages+0x1a7/0x300 mm/mempolicy.c:2190
alloc_slab_page mm/slub.c:1793 [inline]
allocate_slab mm/slub.c:1930 [inline]
new_slab+0x32d/0x4a0 mm/slub.c:1993
___slab_alloc+0x918/0xfe0 mm/slub.c:3022
__slab_alloc.constprop.0+0x4d/0xa0 mm/slub.c:3109
slab_alloc_node mm/slub.c:3200 [inline]
slab_alloc mm/slub.c:3242 [inline]
__kmalloc+0x2fb/0x340 mm/slub.c:4419
kmalloc include/linux/slab.h:595 [inline]
kernfs_fop_write_iter+0x231/0x500 fs/kernfs/file.c:273
call_write_iter include/linux/fs.h:2162 [inline]
new_sync_write+0x429/0x660 fs/read_write.c:503
vfs_write+0x7cd/0xae0 fs/read_write.c:590
ksys_write+0x12d/0x250 fs/read_write.c:643
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
page last free stack trace:
reset_page_owner include/linux/page_owner.h:24 [inline]
free_pages_prepare mm/page_alloc.c:1338 [inline]
free_pcp_prepare+0x374/0x870 mm/page_alloc.c:1389
free_unref_page_prepare mm/page_alloc.c:3309 [inline]
free_unref_page+0x19/0x690 mm/page_alloc.c:3388
kasan_depopulate_vmalloc_pte+0x5c/0x70 mm/kasan/shadow.c:380
apply_to_pte_range mm/memory.c:2518 [inline]
apply_to_pmd_range mm/memory.c:2562 [inline]
apply_to_pud_range mm/memory.c:2598 [inline]
apply_to_p4d_range mm/memory.c:2634 [inline]
__apply_to_page_range+0x686/0x1030 mm/memory.c:2668
kasan_release_vmalloc+0xa7/0xc0 mm/kasan/shadow.c:490
__purge_vmap_area_lazy+0x8f9/0x1c50 mm/vmalloc.c:1708
_vm_unmap_aliases.part.0+0x3f0/0x500 mm/vmalloc.c:2111
_vm_unmap_aliases mm/vmalloc.c:2085 [inline]
vm_unmap_aliases+0x45/0x50 mm/vmalloc.c:2134
change_page_attr_set_clr+0x241/0x500 arch/x86/mm/pat/set_memory.c:1743
change_page_attr_set arch/x86/mm/pat/set_memory.c:1793 [inline]
set_memory_nx+0xb2/0x110 arch/x86/mm/pat/set_memory.c:1941
free_init_pages+0x73/0xc0 arch/x86/mm/init.c:894
kernel_init+0x2e/0x1d0 init/main.c:1508
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295

Memory state around the buggy address:
ffff88801da40280: fb fc fc fc fc fb fc fc fc fc fb fc fc fc fc fa
ffff88801da40300: fc fc fc fc fa fc fc fc fc fa fc fc fc fc fa fc
>ffff88801da40380: fc fc fc 00 fc fc fc fc 01 fc fc fc fc fb fc fc
^
ffff88801da40400: fc fc fb fc fc fc fc fb fc fc fc fc fb fc fc fc
ffff88801da40480: fc fb fc fc fc fc fa fc fc fc fc fb fc fc fc fc
==================================================================
----------------
Code disassembly (best guess):
0: 74 24 je 0x26
2: 10 e8 adc %ch,%al
4: ca db 15 lret $0x15db
7: f8 clc
8: 48 89 ef mov %rbp,%rdi
b: e8 82 51 16 f8 callq 0xf8165192
10: 81 e3 00 02 00 00 and $0x200,%ebx
16: 75 25 jne 0x3d
18: 9c pushfq
19: 58 pop %rax
1a: f6 c4 02 test $0x2,%ah
1d: 75 2d jne 0x4c
1f: 48 85 db test %rbx,%rbx
22: 74 01 je 0x25
24: fb sti
25: bf 01 00 00 00 mov $0x1,%edi
* 2a: e8 c3 1b 09 f8 callq 0xf8091bf2 <-- trapping instruction
2f: 65 8b 05 dc a0 bb 76 mov %gs:0x76bba0dc(%rip),%eax # 0x76bba112
36: 85 c0 test %eax,%eax
38: 74 0a je 0x44
3a: 5b pop %rbx
3b: 5d pop %rbp
3c: c3 retq
3d: e8 .byte 0xe8
3e: f0 lock
3f: 02 .byte 0x2

Tested on:

commit: eec4df26 Merge tag 's390-5.16-6' of git://git.kernel.o..
git tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/
console output: https://syzkaller.appspot.com/x/log.txt?x=1562008db00000
kernel config: https://syzkaller.appspot.com/x/.config?x=1a86c22260afac2f
dashboard link: https://syzkaller.appspot.com/bug?extid=3ae6a2b06f131ab9849f
compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2
patch: https://syzkaller.appspot.com/x/patch.diff?x=177bd55db00000

Next message: pr-tracker-bot: "Re: [GIT PULL] SCSI fixes for 5.16-rc7"
Previous message: Alan Stern: "Re: [PATCH v4 2/2] usb: gadget: clear related members when goto fail"
In reply to: Alan Stern: "Re: [syzbot] KASAN: slab-out-of-bounds Write in usb_hcd_poll_rh_status (2)"
Next in thread: Alan Stern: "Re: [syzbot] KASAN: slab-out-of-bounds Write in usb_hcd_poll_rh_status (2)"
Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]