Oops: general protection fault, probably for non-canonical address 0xdffffc00000000e6: 0000 [#1] SMP KASAN NOPTI
KASAN: null-ptr-deref in range [0x0000000000000730-0x0000000000000737]
CPU: 1 UID: 0 PID: 6986 Comm: syz.1.51 Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/16/2026
RIP: 0010:f_midi2_free_ep_reqs+0x56/0x2b0 drivers/usb/gadget/function/f_midi2.c:1166
Code: 85 6a 02 00 00 49 8b 45 00 48 89 44 24 18 48 05 30 07 00 00 48 89 c2 48 89 44 24 20 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <0f> b6 04 02 84 c0 74 08 3c 03 0f 8e b5 01 00 00 48 8b 44 24 18 31
RSP: 0018:ffffc90000a089e8 EFLAGS: 00010002
RAX: dffffc0000000000 RBX: ffff888069720000 RCX: ffffffff87e73949
RDX: 00000000000000e6 RSI: ffffffff87e73786 RDI: ffff888069720128
RBP: ffff888069720128 R08: 0000000000000004 R09: 0000000000000020
R10: 0000000000000020 R11: 0000000000000000 R12: ffff8880697200f0
R13: ffff888069720128 R14: ffff888069720740 R15: 0000000000000001
FS: 0000000000000000(0000) GS:ffff888123ed8000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f7bee600020 CR3: 000000007d854000 CR4: 00000000003526f0
Call Trace:
f_midi2_stop_eps drivers/usb/gadget/function/f_midi2.c:1246 [inline]
f_midi2_set_alt+0x444/0x5f0 drivers/usb/gadget/function/f_midi2.c:1296
composite_setup+0x16f8/0x9290 drivers/usb/gadget/composite.c:1933
configfs_composite_setup+0xfb/0x130 drivers/usb/gadget/configfs.c:1877
dummy_timer+0x2045/0x36f0 drivers/usb/gadget/udc/dummy_hcd.c:1951
__run_hrtimer kernel/time/hrtimer.c:2032 [inline]
__hrtimer_run_queues+0x462/0x9c0 kernel/time/hrtimer.c:2096
hrtimer_run_softirq+0x17d/0x2c0 kernel/time/hrtimer.c:2113
handle_softirqs+0x1ea/0x9b0 kernel/softirq.c:622
__do_softirq kernel/softirq.c:656 [inline]
invoke_softirq kernel/softirq.c:496 [inline]
__irq_exit_rcu+0x162/0x210 kernel/softirq.c:735
irq_exit_rcu+0x9/0x30 kernel/softirq.c:752
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1062 [inline]
sysvec_apic_timer_interrupt+0xa3/0xc0 arch/x86/kernel/apic/apic.c:1062
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:lock_is_held_type+0xf5/0x140 kernel/locking/lockdep.c:5945
Code: ff ff ff ff 65 0f c1 15 19 95 a9 08 83 fa 01 8b 44 24 04 75 2d 9c 5a 80 e6 02 75 47 41 f7 c5 00 02 00 00 74 01 fb 48 83 c4 08 <5b> 5d 41 5c 41 5d 41 5e 41 5f e9 fc 40 03 00 c3 cc cc cc cc 31 c0
RSP: 0018:ffffc90003467430 EFLAGS: 00000296
RAX: 0000000000000001 RBX: ffffffff8ebe8200 RCX: 0000000000000001
RDX: 0000000000000046 RSI: ffffffff8e1822c3 RDI: ffffffff8c402680
RBP: ffff88801e394a80 R08: 0000000000000006 R09: 0000000000001000
R10: 0000000000000000 R11: 0000000000000000 R12: 00000000ffffffff
R13: 0000000000000246 R14: ffff88801e395648 R15: 0000000000000001
lookup_page_ext+0x6e/0x100 mm/page_ext.c:258
page_ext_iter_begin include/linux/page_ext.h:137 [inline]
page_table_check_clear+0x309/0x8f0 mm/page_table_check.c:78
__page_table_check_pte_clear+0xf1/0x100 mm/page_table_check.c:155
page_table_check_pte_clear include/linux/page_table_check.h:55 [inline]
ptep_get_and_clear_full arch/x86/include/asm/pgtable.h:1263 [inline]
get_and_clear_full_ptes include/linux/pgtable.h:879 [inline]
zap_present_folio_ptes mm/memory.c:1648 [inline]
zap_present_ptes mm/memory.c:1730 [inline]
do_zap_pte_range mm/memory.c:1832 [inline]
zap_pte_range mm/memory.c:1934 [inline]
zap_pmd_range mm/memory.c:2020 [inline]
zap_pud_range mm/memory.c:2048 [inline]
zap_p4d_range mm/memory.c:2069 [inline]
__zap_vma_range+0x2ccc/0x4a30 mm/memory.c:2109
unmap_vmas+0x299/0x5f0 mm/memory.c:2178
exit_mmap+0x1ef/0xa00 mm/mmap.c:1300
__mmput+0x12a/0x410 kernel/fork.c:1187
mmput+0x67/0x80 kernel/fork.c:1210
exit_mm kernel/exit.c:615 [inline]
do_exit+0x8b1/0x2ae0 kernel/exit.c:997
do_group_exit+0xd5/0x2a0 kernel/exit.c:1152
get_signal+0x1ec7/0x21e0 kernel/signal.c:3046
arch_do_signal_or_restart+0x91/0x7e0 arch/x86/kernel/signal.c:337
__exit_to_user_mode_loop kernel/entry/common.c:66 [inline]
exit_to_user_mode_loop+0x139/0x6f0 kernel/entry/common.c:101
__exit_to_user_mode_prepare include/linux/irq-entry-common.h:207 [inline]
syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:230 [inline]
syscall_exit_to_user_mode include/linux/entry-common.h:318 [inline]
do_syscall_64+0x666/0x870 arch/x86/entry/syscall_64.c:100
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f1bd359e019
Code: Unable to access opcode bytes at 0x7f1bd359dfef.
RSP: 002b:00007f1bd440c0e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007f1bd3825fa8 RCX: 00007f1bd359e019
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f1bd3825fa8
RBP: 00007f1bd3825fa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f1bd3826038 R14: 00007ffe3451d660 R15: 00007ffe3451d748
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:f_midi2_free_ep_reqs+0x56/0x2b0 drivers/usb/gadget/function/f_midi2.c:1166
Code: 85 6a 02 00 00 49 8b 45 00 48 89 44 24 18 48 05 30 07 00 00 48 89 c2 48 89 44 24 20 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <0f> b6 04 02 84 c0 74 08 3c 03 0f 8e b5 01 00 00 48 8b 44 24 18 31
RSP: 0018:ffffc90000a089e8 EFLAGS: 00010002
RAX: dffffc0000000000 RBX: ffff888069720000 RCX: ffffffff87e73949
RDX: 00000000000000e6 RSI: ffffffff87e73786 RDI: ffff888069720128
RBP: ffff888069720128 R08: 0000000000000004 R09: 0000000000000020
R10: 0000000000000020 R11: 0000000000000000 R12: ffff8880697200f0
R13: ffff888069720128 R14: ffff888069720740 R15: 0000000000000001
FS: 0000000000000000(0000) GS:ffff888123ed8000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f7bee600020 CR3: 000000007d854000 CR4: 00000000003526f0
----------------
Code disassembly (best guess):
0: 85 6a 02 test %ebp,0x2(%rdx)
3: 00 00 add %al,(%rax)
5: 49 8b 45 00 mov 0x0(%r13),%rax
9: 48 89 44 24 18 mov %rax,0x18(%rsp)
e: 48 05 30 07 00 00 add $0x730,%rax
14: 48 89 c2 mov %rax,%rdx
17: 48 89 44 24 20 mov %rax,0x20(%rsp)
1c: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax
23: fc ff df
26: 48 c1 ea 03 shr $0x3,%rdx
* 2a: 0f b6 04 02 movzbl (%rdx,%rax,1),%eax <-- trapping instruction
2e: 84 c0 test %al,%al
30: 74 08 je 0x3a
32: 3c 03 cmp $0x3,%al
34: 0f 8e b5 01 00 00 jle 0x1ef
3a: 48 8b 44 24 18 mov 0x18(%rsp),%rax
3f: 31 .byte 0x31