BUG: using smp_processor_id() in preemptible code in usbnet_skb_return

Status: auto-obsoleted due to no activity on 2025/07/15 15:38
Reported-by: syzbot+5a2d27f80f293c90b286@syzkaller.appspotmail.com
First crash: 749d, last: 502d
Fix bisection: failed (error log, bisect log)
  
▶ ▼ Bug presence (2)
Date Name Commit Repro Result
2025/05/11 lts (merge base) 3b8db0e4f263 syz Didn't crash
2025/05/11 upstream (ToT) 82f2b0b97b36 syz Didn't crash
▶ ▼ Similar bugs (5)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
android-54 BUG: using smp_processor_id() in preemptible code in usbnet_skb_return 4 syz 1 1147d 1606d 0/2 auto-obsoleted due to no activity on 2023/10/09 13:39
upstream BUG: using smp_processor_id() in preemptible code in usbnet_skb_return net usb 4 1 479d 475d 0/29 auto-obsoleted due to no activity on 2025/08/07 12:09
android-5-10 BUG: using smp_processor_id() in preemptible code in usbnet_skb_return 4 syz error error 2 1126d 1606d 0/2 auto-obsoleted due to no activity on 2023/10/20 12:45
android-6-1 BUG: using smp_processor_id() in preemptible code in usbnet_skb_return 4 2 764d 764d 0/2 auto-obsoleted due to no activity on 2024/10/16 04:07
android-5-10 BUG: using smp_processor_id() in preemptible code in usbnet_skb_return (2) 4 syz, C error 2 473d 665d 0/2 auto-obsoleted due to no activity on 2025/08/15 18:54
▶ ▼ Fix bisection attempts (5)
Created Duration User Patch Repo Result
2025/05/07 19:47 19m bisect fix android13-5.15-lts error job log
2025/02/26 07:22 2h34m bisect fix android13-5.15-lts OK (0) job log log
2024/12/21 01:06 2h29m bisect fix android13-5.15-lts OK (0) job log log
2024/10/19 05:12 1h45m bisect fix android13-5.15-lts OK (0) job log log
2024/09/17 16:02 2h30m bisect fix android13-5.15-lts OK (0) job log log

Sample crash report:
BUG: using smp_processor_id() in preemptible [00000000] code: dhcpcd/139
caller is debug_smp_processor_id+0x17/0x20 lib/smp_processor_id.c:60
CPU: 0 PID: 139 Comm: dhcpcd Not tainted 5.15.175-syzkaller-00803-g19092c8155b4 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x151/0x1c0 lib/dump_stack.c:106
 dump_stack+0x15/0x20 lib/dump_stack.c:113
 check_preemption_disabled+0x109/0x110 lib/smp_processor_id.c:49
 debug_smp_processor_id+0x17/0x20 lib/smp_processor_id.c:60
 usbnet_skb_return+0x6f/0x290 drivers/net/usb/usbnet.c:323
 usbnet_resume_rx+0x4d/0xd0 drivers/net/usb/usbnet.c:702
 usbnet_change_mtu+0x4ed/0x670 drivers/net/usb/usbnet.c:409
 __dev_set_mtu net/core/dev.c:8915 [inline]
 dev_set_mtu_ext+0x458/0x690 net/core/dev.c:8968
 dev_set_mtu+0xa0/0x180 net/core/dev.c:8992
 dev_ifsioc+0x4ad/0x10c0 net/core/dev_ioctl.c:331
 dev_ioctl+0x54d/0xe70 net/core/dev_ioctl.c:587
 sock_do_ioctl+0x34f/0x5a0 net/socket.c:1154
 sock_ioctl+0x455/0x740 net/socket.c:1257
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:874 [inline]
 __se_sys_ioctl+0x114/0x190 fs/ioctl.c:860
 __x64_sys_ioctl+0x7b/0x90 fs/ioctl.c:860
 x64_sys_call+0x98/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:17
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7fac0fae4d49
Code: 5c c3 48 8d 44 24 08 48 89 54 24 e0 48 89 44 24 c0 48 8d 44 24 d0 48 89 44 24 c8 b8 10 00 00 00 c7 44 24 b8 10 00 00 00 0f 05 <41> 89 c0 3d 00 f0 ff ff 76 10 48 8b 15 ae 60 0d 00 f7 d8 41 83 c8
RSP: 002b:00007ffcaee55878 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fac0fa166c0 RCX: 00007fac0fae4d49
RDX: 00007ffcaee65a68 RSI: 0000000000008922 RDI: 0000000000000012
RBP: 00007ffcaee75c28 R08: 00007ffcaee65a28 R09: 00007ffcaee659d8
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffcaee65a68 R14: 0000000000000028 R15: 0000000000008922
 </TASK>

Crashes (6):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/01/12 01:49 android13-5.15-lts 19092c8155b4 6dbc6a9b .config strace log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-5-15 BUG: using smp_processor_id() in preemptible code in usbnet_skb_return
2025/01/11 20:31 android13-5.15-lts 19092c8155b4 6dbc6a9b .config strace log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-5-15 BUG: using smp_processor_id() in preemptible code in usbnet_skb_return
2024/08/02 22:04 android13-5.15-lts 70e1a731d986 1e9c4cf3 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-android-5-15 BUG: using smp_processor_id() in preemptible code in usbnet_skb_return
2024/08/02 20:20 android13-5.15-lts 70e1a731d986 1e9c4cf3 .config strace log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-5-15 BUG: using smp_processor_id() in preemptible code in usbnet_skb_return
2024/08/02 16:16 android13-5.15-lts 70e1a731d986 1e9c4cf3 .config strace log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-5-15 BUG: using smp_processor_id() in preemptible code in usbnet_skb_return
2024/08/02 13:33 android13-5.15-lts 70e1a731d986 1e9c4cf3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 BUG: using smp_processor_id() in preemptible code in usbnet_skb_return
* Struck through repros no longer work on HEAD.