------------[ cut here ]------------
usb_ep_enable: ep129 (ep1in-bulk) has maxpacket 0
WARNING: CPU: 0 PID: 4395 at drivers/usb/gadget/udc/core.c:108 usb_ep_enable+0x25f/0x440 drivers/usb/gadget/udc/core.c:107
Modules linked in:
CPU: 0 PID: 4395 Comm: syz.2.20 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:usb_ep_enable+0x25f/0x440 drivers/usb/gadget/udc/core.c:107
Code: 49 8b 0e 48 c7 c0 e0 2d d5 8a 49 c7 c0 00 2e d5 8a 4c 0f 44 c0 48 c7 c7 a0 2d d5 8a 48 c7 c6 e7 0e e2 8b 89 ea e8 41 ee 80 03 <0f> 0b e9 e1 fe ff ff e8 c5 e7 42 fb 49 bc 00 00 00 00 00 fc ff df
RSP: 0018:ffffc90000007688 EFLAGS: 00010046
RAX: 224a83614d0d7b00 RBX: ffff8880231640e0 RCX: ffff88802c391dc0
RDX: 0000000000000100 RSI: 0000000000000103 RDI: 0000000000000000
RBP: 0000000000000081 R08: ffff8880b8e2795b R09: 1ffff110171c4f2b
R10: dffffc0000000000 R11: ffffed10171c4f2c R12: dffffc0000000000
R13: ffff88802316410d R14: ffff8880231640e8 R15: ffff8880730bdd3a
FS: 00007f4942fb06c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffdc0d8ac80 CR3: 00000000743a9000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
hidg_set_alt+0x126/0xa00 drivers/usb/gadget/function/f_hid.c:822
set_config+0x734/0xfa0 drivers/usb/gadget/composite.c:972
composite_setup+0x1999/0x2b60 drivers/usb/gadget/composite.c:1878
configfs_composite_setup+0xc3/0x100 drivers/usb/gadget/configfs.c:1492
dummy_timer+0x1338/0x34a0 drivers/usb/gadget/udc/dummy_hcd.c:1944
call_timer_fn+0x17b/0x540 kernel/time/timer.c:1648
expire_timers kernel/time/timer.c:1699 [inline]
__run_timers+0x56c/0x810 kernel/time/timer.c:1970
run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1983
handle_softirqs+0x336/0x830 kernel/softirq.c:576
__do_softirq kernel/softirq.c:610 [inline]
invoke_softirq kernel/softirq.c:450 [inline]
__irq_exit_rcu+0x13b/0x230 kernel/softirq.c:659
irq_exit_rcu+0x5/0x20 kernel/softirq.c:671
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1108 [inline]
sysvec_apic_timer_interrupt+0xa0/0xc0 arch/x86/kernel/apic/apic.c:1108
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676
RIP: 0010:orc_ip arch/x86/kernel/unwind_orc.c:30 [inline]
RIP: 0010:__orc_find arch/x86/kernel/unwind_orc.c:52 [inline]
RIP: 0010:orc_find arch/x86/kernel/unwind_orc.c:178 [inline]
RIP: 0010:unwind_next_frame+0xfb3/0x1cf0 arch/x86/kernel/unwind_orc.c:448
Code: 89 37 e9 33 01 00 00 49 89 f4 48 89 f5 4c 89 e8 48 29 e8 48 89 c1 48 c1 f9 02 48 c1 e8 3f 48 01 c8 48 83 e0 fe 4c 8d 7c 45 00 <4c> 89 f8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df 0f b6 04 08 84
RSP: 0018:ffffc90003feeb80 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffffc90003feec68 RCX: 0000000000000001
RDX: ffffffff8ee4e918 RSI: ffffffff8e794ac8 RDI: ffffffff81351ed7
RBP: ffffffff8e794ae4 R08: 0000000000000009 R09: ffffc90003feec68
R10: dffffc0000000000 R11: fffff520007fdd99 R12: ffffffff8e794ae0
R13: ffffffff8e794ae8 R14: ffffffff81353d30 R15: ffffffff8e794ae4
__unwind_start+0x51a/0x650 arch/x86/kernel/unwind_orc.c:704
unwind_start arch/x86/include/asm/unwind.h:60 [inline]
arch_stack_walk+0xda/0x140 arch/x86/kernel/stacktrace.c:24
stack_trace_save+0xa6/0xf0 kernel/stacktrace.c:122
save_stack+0x121/0x230 mm/page_owner.c:119
__reset_page_owner+0x51/0x180 mm/page_owner.c:140
reset_page_owner include/linux/page_owner.h:24 [inline]
free_pages_prepare mm/page_alloc.c:1340 [inline]
free_pcp_prepare mm/page_alloc.c:1391 [inline]
free_unref_page_prepare+0x637/0x6c0 mm/page_alloc.c:3317
free_unref_page_list+0x119/0x830 mm/page_alloc.c:3433
shrink_page_list+0x60e5/0x6de0 mm/vmscan.c:1818
reclaim_pages+0x712/0x990 mm/vmscan.c:2424
madvise_cold_or_pageout_pte_range+0x1680/0x1ea0 mm/madvise.c:478
walk_pmd_range mm/pagewalk.c:128 [inline]
walk_pud_range mm/pagewalk.c:205 [inline]
walk_p4d_range mm/pagewalk.c:240 [inline]
walk_pgd_range+0xb28/0x1370 mm/pagewalk.c:277
__walk_page_range+0x136/0x590 mm/pagewalk.c:379
walk_page_range+0x3a3/0x550 mm/pagewalk.c:477
madvise_pageout_page_range mm/madvise.c:531 [inline]
madvise_pageout mm/madvise.c:567 [inline]
madvise_vma mm/madvise.c:997 [inline]
do_madvise+0x16a6/0x2aa0 mm/madvise.c:1206
__do_sys_madvise mm/madvise.c:1232 [inline]
__se_sys_madvise mm/madvise.c:1230 [inline]
__x64_sys_madvise+0xa2/0xb0 mm/madvise.c:1230
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f4944d58559
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f4942fb0028 EFLAGS: 00000246 ORIG_RAX: 000000000000001c
RAX: ffffffffffffffda RBX: 00007f4944fdffa0 RCX: 00007f4944d58559
RDX: 0000000000000015 RSI: 0000000000c00000 RDI: 0000200000000000
RBP: 00007f4944defab8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f4944fe0038 R14: 00007f4944fdffa0 R15: 00007fffb14ecf18
----------------
Code disassembly (best guess):
0: 89 37 mov %esi,(%rdi)
2: e9 33 01 00 00 jmp 0x13a
7: 49 89 f4 mov %rsi,%r12
a: 48 89 f5 mov %rsi,%rbp
d: 4c 89 e8 mov %r13,%rax
10: 48 29 e8 sub %rbp,%rax
13: 48 89 c1 mov %rax,%rcx
16: 48 c1 f9 02 sar $0x2,%rcx
1a: 48 c1 e8 3f shr $0x3f,%rax
1e: 48 01 c8 add %rcx,%rax
21: 48 83 e0 fe and $0xfffffffffffffffe,%rax
25: 4c 8d 7c 45 00 lea 0x0(%rbp,%rax,2),%r15
* 2a: 4c 89 f8 mov %r15,%rax <-- trapping instruction
2d: 48 c1 e8 03 shr $0x3,%rax
31: 48 b9 00 00 00 00 00 movabs $0xdffffc0000000000,%rcx
38: fc ff df
3b: 0f b6 04 08 movzbl (%rax,%rcx,1),%eax
3f: 84 .byte 0x84