Hello,
syzbot found the following issue on:
HEAD commit: 15ef2f78c49d Merge tag 'input-for-v7.2-rc7' of git://git.k..
git tree: upstream
console output:
https://syzkaller.appspot.com/x/log.txt?x=11b16949580000
kernel config:
https://syzkaller.appspot.com/x/.config?x=1d67342c314f228d
dashboard link:
https://syzkaller.appspot.com/bug?extid=87188222c77c0dbbdb4d
compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44
syz repro:
https://syzkaller.appspot.com/x/repro.syz?x=1198b279580000
C reproducer:
https://syzkaller.appspot.com/x/repro.c?x=1598b279580000
Downloadable assets:
disk image (non-bootable):
https://storage.googleapis.com/syzbot-assets/d900f083ada3/non_bootable_disk-15ef2f78.raw.xz
vmlinux:
https://storage.googleapis.com/syzbot-assets/dc9c417e94c9/vmlinux-15ef2f78.xz
kernel image:
https://storage.googleapis.com/syzbot-assets/db592e5f65db/bzImage-15ef2f78.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by:
syzbot+871882...@syzkaller.appspotmail.com
usb 5-1: selecting invalid altsetting 0
usb 5-1: USB disconnect, device number 2
Oops: general protection fault, probably for non-canonical address 0xdffffc000000000b: 0000 [#1] SMP KASAN NOPTI
KASAN: null-ptr-deref in range [0x0000000000000058-0x000000000000005f]
CPU: 1 UID: 0 PID: 29 Comm: kworker/1:0 Not tainted syzkaller #0 PREEMPT(full)
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
Workqueue: usb_hub_wq hub_event
RIP: 0010:klist_put+0x4d/0x1d0 lib/klist.c:212
Code: c1 ea 03 80 3c 02 00 0f 85 74 01 00 00 48 b8 00 00 00 00 00 fc ff df 4c 8b 23 49 83 e4 fe 49 8d 7c 24 58 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 43 01 00 00 4c 89 e7 4d 8b 74 24 58 e8 7c 10 0d
RSP: 0018:ffffc90000687620 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: ffff888036142880 RCX: 0000000000000000
RDX: 000000000000000b RSI: ffffffff8bb263a5 RDI: 0000000000000058
RBP: 0000000000000001 R08: 0000000000000000 R09: fffffbfff2247f98
R10: ffffffff9123fcc3 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000001 R14: ffffffff9123fc80 R15: dffffc0000000000
FS: 0000000000000000(0000) GS:ffff8880d5cde000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fff41160ff4 CR3: 0000000033bb7000 CR4: 0000000000352ef0
Call Trace:
<TASK>
klist_del lib/klist.c:230 [inline]
klist_remove+0x14c/0x2e0 lib/klist.c:249
__device_release_driver drivers/base/dd.c:1357 [inline]
device_release_driver_internal+0x4fb/0x620 drivers/base/dd.c:1372
bus_remove_device+0x2bc/0x560 drivers/base/bus.c:664
device_del+0x376/0x9b0 drivers/base/core.c:3961
usb_disable_device+0x367/0x810 drivers/usb/core/message.c:1478
usb_disconnect+0x2e2/0x9a0 drivers/usb/core/hub.c:2345
hub_port_connect drivers/usb/core/hub.c:5415 [inline]
hub_port_connect_change drivers/usb/core/hub.c:5715 [inline]
port_event drivers/usb/core/hub.c:5879 [inline]
hub_event+0x1bb1/0x4420 drivers/usb/core/hub.c:5961
process_one_work+0xa23/0x1940 kernel/workqueue.c:3322
process_scheduled_works kernel/workqueue.c:3405 [inline]
worker_thread+0x5ef/0xe50 kernel/workqueue.c:3486
kthread+0x370/0x450 kernel/kthread.c:436
ret_from_fork+0x72b/0xd50 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
</TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:klist_put+0x4d/0x1d0 lib/klist.c:212
Code: c1 ea 03 80 3c 02 00 0f 85 74 01 00 00 48 b8 00 00 00 00 00 fc ff df 4c 8b 23 49 83 e4 fe 49 8d 7c 24 58 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 43 01 00 00 4c 89 e7 4d 8b 74 24 58 e8 7c 10 0d
RSP: 0018:ffffc90000687620 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: ffff888036142880 RCX: 0000000000000000
RDX: 000000000000000b RSI: ffffffff8bb263a5 RDI: 0000000000000058
RBP: 0000000000000001 R08: 0000000000000000 R09: fffffbfff2247f98
R10: ffffffff9123fcc3 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000001 R14: ffffffff9123fc80 R15: dffffc0000000000
FS: 0000000000000000(0000) GS:ffff8880d5cde000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fff41160ff4 CR3: 000000002ccae000 CR4: 0000000000352ef0
----------------
Code disassembly (best guess):
0: c1 ea 03 shr $0x3,%edx
3: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1)
7: 0f 85 74 01 00 00 jne 0x181
d: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax
14: fc ff df
17: 4c 8b 23 mov (%rbx),%r12
1a: 49 83 e4 fe and $0xfffffffffffffffe,%r12
1e: 49 8d 7c 24 58 lea 0x58(%r12),%rdi
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 43 01 00 00 jne 0x177
34: 4c 89 e7 mov %r12,%rdi
37: 4d 8b 74 24 58 mov 0x58(%r12),%r14
3c: e8 .byte 0xe8
3d: 7c 10 jl 0x4f
3f: 0d .byte 0xd
---
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