BUG: unable to handle kernel paging request in rebind_store

Status: upstream: reported on 2026/08/05 04:55
Reported-by: syzbot+f05ec31888a56c27582b@syzkaller.appspotmail.com
First crash: 12h11m, last: 12h10m
Similar bugs (2)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-6.6 general protection fault in rebind_store 2 6 6d08h 7d13h 0/2 upstream: reported on 2026/07/29 03:10
upstream general protection fault in rebind_store usb prio:low 2 16 2h24m 4d16h 0/29 upstream: reported on 2026/08/01 00:36

Sample crash report:
Unable to handle kernel paging request at virtual address dfff80000000001d
KASAN: null-ptr-deref in range [0x00000000000000e8-0x00000000000000ef]
Mem abort info:
  ESR = 0x0000000096000006
  EC = 0x25: DABT (current EL), IL = 32 bits
  SET = 0, FnV = 0
  EA = 0, S1PTW = 0
  FSC = 0x06: level 2 translation fault
Data abort info:
  ISV = 0, ISS = 0x00000006
  CM = 0, WnR = 0
[dfff80000000001d] address between user and kernel address ranges
Internal error: Oops: 0000000096000006 [#1] PREEMPT SMP
Modules linked in:
CPU: 1 PID: 6334 Comm: syz.2.722 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
pstate: 02400005 (nzcv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--)
pc : do_rebind drivers/usb/usbip/stub_main.c:206 [inline]
pc : rebind_store+0xb8/0x210 drivers/usb/usbip/stub_main.c:266
lr : spin_unlock include/linux/spinlock.h:391 [inline]
lr : put_busid_priv drivers/usb/usbip/stub_main.c:85 [inline]
lr : rebind_store+0x94/0x210 drivers/usb/usbip/stub_main.c:264
sp : ffff8000212579e0
x29: ffff8000212579e0 x28: ffff800021257b68 x27: 1fffe0001e9a5280
x26: ffff0000d2c4e740 x25: 1ffff000039308b2 x24: dfff800000000000
x23: dfff800000000000 x22: 00000000000000e8 x21: ffff80001c984590
x20: ffff0000f41ac300 x19: 0000000000000001 x18: 0000000000000000
x17: 0000000000000000 x16: ffff8000082f2d40 x15: ffff8000184cd000
x14: 0000000000000001 x13: 1ffff000039308b4 x12: 0000000000000000
x11: 0000000000000000 x10: 0000000000000001 x9 : dfff800000000000
x8 : 000000000000001d x7 : 0000000000000000 x6 : 0000000000000000
x5 : ffff8000188370e8 x4 : 0000000000000008 x3 : ffff8000082f2e54
x2 : 0000000000000001 x1 : 0000000000000001 x0 : 0000000000000001
Call trace:
 do_rebind drivers/usb/usbip/stub_main.c:206 [inline]
 rebind_store+0xb8/0x210 drivers/usb/usbip/stub_main.c:266
 drv_attr_store+0x80/0xa4 drivers/base/bus.c:77
 sysfs_kf_write+0x1f8/0x274 fs/sysfs/file.c:140
 kernfs_fop_write_iter+0x390/0x4b4 fs/kernfs/file.c:352
 call_write_iter include/linux/fs.h:2265 [inline]
 new_sync_write fs/read_write.c:491 [inline]
 vfs_write+0x3c8/0x7c8 fs/read_write.c:584
 ksys_write+0x12c/0x228 fs/read_write.c:637
 __do_sys_write fs/read_write.c:649 [inline]
 __se_sys_write fs/read_write.c:646 [inline]
 __arm64_sys_write+0x7c/0x90 fs/read_write.c:646
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x290 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x13c/0x258 arch/arm64/kernel/syscall.c:140
 do_el0_svc+0x5c/0x134 arch/arm64/kernel/syscall.c:204
 el0_svc+0x58/0x128 arch/arm64/kernel/entry-common.c:637
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585
Code: 96a99159 f94002a8 9103a116 d343fec8 (38786908) 
---[ end trace 0000000000000000 ]---
----------------
Code disassembly (best guess):
   0:	96a99159 	bl	0xfffffffffaa64564
   4:	f94002a8 	ldr	x8, [x21]
   8:	9103a116 	add	x22, x8, #0xe8
   c:	d343fec8 	lsr	x8, x22, #3
* 10:	38786908 	ldrb	w8, [x8, x24] <-- trapping instruction

Crashes (3):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/08/05 04:56 linux-6.1.y fb28aa725e05 52aa2820 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: unable to handle kernel paging request in rebind_store
2026/08/05 04:55 linux-6.1.y fb28aa725e05 52aa2820 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: unable to handle kernel paging request in rebind_store
2026/08/05 04:55 linux-6.1.y fb28aa725e05 52aa2820 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: unable to handle kernel paging request in rebind_store
* Struck through repros no longer work on HEAD.