======================================
| [   18.153105][  T313] ==================================================================
| [ 18.153452][ T313] BUG: KASAN: slab-use-after-free in emit_its_trampoline (arch/x86/kernel/alternative.c:129 arch/x86/kernel/alternative.c:236 arch/x86/kernel/alternative.c:264 arch/x86/kernel/alternative.c:808) 
| [   18.153709][  T313] Read of size 1 at addr ffff888001932720 by task modprobe/313
| [   18.153956][  T313]
[   18.154048][  T313] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   18.154050][  T313] Call Trace:
[   18.154052][  T313]  <TASK>
[ 18.154054][ T313] dump_stack_lvl (lib/dump_stack.c:123) 
[ 18.154061][ T313] print_address_description.constprop.0 (mm/kasan/report.c:409) 
[ 18.154067][ T313] ? emit_its_trampoline (arch/x86/kernel/alternative.c:129 arch/x86/kernel/alternative.c:236 arch/x86/kernel/alternative.c:264 arch/x86/kernel/alternative.c:808) 
[ 18.154071][ T313] print_report (mm/kasan/report.c:522) 
[ 18.154075][ T313] ? emit_its_trampoline (arch/x86/kernel/alternative.c:129 arch/x86/kernel/alternative.c:236 arch/x86/kernel/alternative.c:264 arch/x86/kernel/alternative.c:808) 
[ 18.154078][ T313] ? kasan_addr_to_slab (./include/linux/mm.h:1178 mm/kasan/../slab.h:211 mm/kasan/common.c:38) 
[ 18.154082][ T313] ? emit_its_trampoline (arch/x86/kernel/alternative.c:129 arch/x86/kernel/alternative.c:236 arch/x86/kernel/alternative.c:264 arch/x86/kernel/alternative.c:808) 
[ 18.154085][ T313] kasan_report (mm/kasan/report.c:636) 
[ 18.154089][ T313] ? emit_its_trampoline (arch/x86/kernel/alternative.c:129 arch/x86/kernel/alternative.c:236 arch/x86/kernel/alternative.c:264 arch/x86/kernel/alternative.c:808) 
[ 18.154094][ T313] ? emit_its_trampoline (arch/x86/kernel/alternative.c:129 arch/x86/kernel/alternative.c:236 arch/x86/kernel/alternative.c:264 arch/x86/kernel/alternative.c:808) 
[ 18.154097][ T313] __kasan_check_byte (mm/kasan/common.c:561) 
[ 18.154101][ T313] krealloc_noprof (mm/slub.c:4858 mm/slub.c:4958) 
[ 18.154105][ T313] ? execmem_alloc (mm/execmem.c:299 mm/execmem.c:383) 
[ 18.154112][ T313] emit_its_trampoline (arch/x86/kernel/alternative.c:129 arch/x86/kernel/alternative.c:236 arch/x86/kernel/alternative.c:264 arch/x86/kernel/alternative.c:808) 
[ 18.154115][ T313] ? __x86_indirect_paranoid_thunk_rax (./arch/x86/include/asm/GEN-for-each-reg.h:6) 
[ 18.154121][ T313] ? __do_softirq (./arch/x86/include/asm/GEN-for-each-reg.h:6) 
[ 18.154126][ T313] apply_retpolines (arch/x86/kernel/alternative.c:994 (discriminator 3)) 
[ 18.154131][ T313] ? __pfx_apply_retpolines (arch/x86/kernel/alternative.c:946) 
[ 18.154135][ T313] ? __pfx___mutex_lock (kernel/locking/mutex.c:746) 
[ 18.154141][ T313] ? irqentry_exit (kernel/entry/common.c:311) 
[ 18.154145][ T313] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475) 
[ 18.154151][ T313] module_finalize (arch/x86/kernel/module.c:292) 
[ 18.154159][ T313] ? add_kallsyms (./include/linux/string.h:355 kernel/module/kallsyms.c:200) 
[ 18.154164][ T313] ? __pfx_module_finalize (arch/x86/kernel/module.c:241) 
[ 18.154169][ T313] ? __pfx_cmp_ex_sort (lib/extable.c:52) 
[ 18.154172][ T313] ? __pfx_swap_ex (lib/extable.c:28) 
[ 18.154176][ T313] load_module (kernel/module/main.c:2927 kernel/module/main.c:3422) 
[ 18.154183][ T313] ? __pfx_load_module (kernel/module/main.c:3327) 
[ 18.154186][ T313] ? kernel_read_file (fs/kernel_read_file.c:80 (discriminator 2)) 
[ 18.154192][ T313] ? kernel_read_file (./arch/x86/include/asm/atomic.h:53 ./include/linux/atomic/atomic-arch-fallback.h:992 ./include/linux/atomic/atomic-instrumented.h:436 ./include/linux/fs.h:3192 fs/kernel_read_file.c:122) 
[ 18.154197][ T313] ? __pfx_kernel_read_file (fs/kernel_read_file.c:38) 
[ 18.154202][ T313] ? init_module_from_file (kernel/module/main.c:3673) 
[ 18.154205][ T313] init_module_from_file (kernel/module/main.c:3673) 
[ 18.154208][ T313] ? __pfx_init_module_from_file (kernel/module/main.c:3649) 
[ 18.154216][ T313] ? idempotent_init_module (kernel/module/main.c:3685) 
[ 18.154218][ T313] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 18.154223][ T313] ? do_raw_spin_unlock (./arch/x86/include/asm/atomic.h:23 ./include/linux/atomic/atomic-arch-fallback.h:457 ./include/linux/atomic/atomic-instrumented.h:33 ./include/asm-generic/qspinlock.h:57 kernel/locking/spinlock_debug.c:101 kernel/locking/spinlock_debug.c:141) 
[ 18.154228][ T313] idempotent_init_module (kernel/module/main.c:3685) 
[ 18.154232][ T313] ? __pfx_idempotent_init_module (kernel/module/main.c:3677) 
[ 18.154238][ T313] ? cap_capable (security/commoncap.c:132) 
[ 18.154245][ T313] __x64_sys_finit_module (./include/linux/file.h:62 ./include/linux/file.h:83 kernel/module/main.c:3708 kernel/module/main.c:3695 kernel/module/main.c:3695) 
[ 18.154248][ T313] ? do_syscall_64 (./arch/x86/include/asm/irqflags.h:42 ./arch/x86/include/asm/irqflags.h:119 ./include/linux/entry-common.h:199 arch/x86/entry/syscall_64.c:90) 
[ 18.154251][ T313] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 18.154254][ T313] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   18.154258][  T313] RIP: 0033:0x7f62353cae5d
[ 18.154262][ T313] Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa 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 8b 0d 73 9f 1b 00 f7 d8 64 89 01 48
All code
========
   0:	ff c3                	inc    %ebx
   2:	66 2e 0f 1f 84 00 00 	cs nopw 0x0(%rax,%rax,1)
   9:	00 00 00 
   c:	90                   	nop
   d:	f3 0f 1e fa          	endbr64
  11:	48 89 f8             	mov    %rdi,%rax
  14:	48 89 f7             	mov    %rsi,%rdi
  17:	48 89 d6             	mov    %rdx,%rsi
  1a:	48 89 ca             	mov    %rcx,%rdx
  1d:	4d 89 c2             	mov    %r8,%r10
  20:	4d 89 c8             	mov    %r9,%r8
  23:	4c 8b 4c 24 08       	mov    0x8(%rsp),%r9
  28:	0f 05                	syscall
  2a:*	48 3d 01 f0 ff ff    	cmp    $0xfffffffffffff001,%rax		<-- trapping instruction
  30:	73 01                	jae    0x33
  32:	c3                   	ret
  33:	48 8b 0d 73 9f 1b 00 	mov    0x1b9f73(%rip),%rcx        # 0x1b9fad
  3a:	f7 d8                	neg    %eax
  3c:	64 89 01             	mov    %eax,%fs:(%rcx)
  3f:	48                   	rex.W

Code starting with the faulting instruction
===========================================
   0:	48 3d 01 f0 ff ff    	cmp    $0xfffffffffffff001,%rax
   6:	73 01                	jae    0x9
   8:	c3                   	ret
   9:	48 8b 0d 73 9f 1b 00 	mov    0x1b9f73(%rip),%rcx        # 0x1b9f83
  10:	f7 d8                	neg    %eax
  12:	64 89 01             	mov    %eax,%fs:(%rcx)
  15:	48                   	rex.W
[   18.154265][  T313] RSP: 002b:00007ffea2cc92a8 EFLAGS: 00000246 ORIG_RAX: 0000000000000139
[   18.154269][  T313] RAX: ffffffffffffffda RBX: 000055feb03d4c80 RCX: 00007f62353cae5d
[   18.154271][  T313] RDX: 0000000000000000 RSI: 000055fe8c405a2a RDI: 0000000000000000
[   18.154273][  T313] RBP: 0000000000040000 R08: 0000000000000000 R09: 00007ffea2cc93e0
[   18.154274][  T313] R10: 0000000000000000 R11: 0000000000000246 R12: 000055fe8c405a2a
[   18.154276][  T313] R13: 000055feb03d4d40 R14: 000055feb03d4dc0 R15: 000055feb03d4cec
| [   18.174095][  T313]                                ^
| [   18.174253][  T313]  ffff888001932780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
| [   18.174518][  T313]  ffff888001932800: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 fc
| [   18.174764][  T313] ==================================================================
| [   18.175058][  T313] Disabling lock debugging due to kernel taint
[  247.191028][   T44] INFO: task modprobe:313 blocked for more than 122 seconds.
[  247.191425][   T44]       Tainted: G    B               6.16.0-rc2-virtme #1
[  247.191648][   T44] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[  247.191944][   T44] task:modprobe        state:D stack:25792 pid:313   tgid:313   ppid:152    task_flags:0x400100 flags:0x00004002
[  247.192285][   T44] Call Trace:
[  247.192408][   T44]  <TASK>
[ 247.192588][ T44] __schedule (kernel/sched/core.c:5396 kernel/sched/core.c:6785) 
[ 247.192771][ T44] ? __pfx___schedule (kernel/sched/core.c:6662) 
[ 247.192944][ T44] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 247.193142][ T44] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 247.193300][ T44] ? schedule (kernel/sched/core.c:6844 kernel/sched/core.c:6877) 
[ 247.193421][ T44] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 247.193576][ T44] schedule (kernel/sched/core.c:6864 kernel/sched/core.c:6878) 
[ 247.193701][ T44] schedule_preempt_disabled (kernel/sched/core.c:6936) 
[ 247.193868][ T44] __mutex_lock (kernel/locking/mutex.c:183 kernel/locking/mutex.c:681 kernel/locking/mutex.c:747) 
[ 247.194046][ T44] ? text_poke_set (arch/x86/kernel/alternative.c:2671) 
[ 247.194206][ T44] ? __pfx___mutex_lock (kernel/locking/mutex.c:746) 
[ 247.194361][ T44] ? execmem_free (mm/execmem.c:330 mm/execmem.c:398) 
[ 247.194519][ T44] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 247.194670][ T44] ? trace_lock_release (./include/trace/events/lock.h:69 (discriminator 21)) 
[ 247.194837][ T44] ? text_poke_set (arch/x86/kernel/alternative.c:2671) 
[ 247.194990][ T44] text_poke_set (arch/x86/kernel/alternative.c:2671) 
[ 247.195146][ T44] ? __pfx_text_poke_set (arch/x86/kernel/alternative.c:2663) 
[ 247.195318][ T44] execmem_free (mm/execmem.c:332 mm/execmem.c:398) 
[ 247.195477][ T44] ? __pfx_execmem_free (mm/execmem.c:391) 
[ 247.195632][ T44] ? emit_its_trampoline (arch/x86/kernel/alternative.c:129 arch/x86/kernel/alternative.c:236 arch/x86/kernel/alternative.c:264 arch/x86/kernel/alternative.c:808) 
[ 247.195809][ T44] ? __kasan_check_byte (mm/kasan/common.c:561) 
[ 247.195969][ T44] ? krealloc_noprof (mm/slub.c:4858 mm/slub.c:4958) 
[ 247.196126][ T44] ? execmem_alloc (mm/execmem.c:299 mm/execmem.c:383) 
[ 247.196282][ T44] emit_its_trampoline (arch/x86/kernel/alternative.c:266 arch/x86/kernel/alternative.c:808) 
[ 247.196436][ T44] ? __x86_indirect_paranoid_thunk_rax (./arch/x86/include/asm/GEN-for-each-reg.h:6) 
[ 247.196633][ T44] ? __do_softirq (./arch/x86/include/asm/GEN-for-each-reg.h:6) 
[ 247.196801][ T44] apply_retpolines (arch/x86/kernel/alternative.c:994 (discriminator 3)) 
[ 247.196960][ T44] ? __pfx_apply_retpolines (arch/x86/kernel/alternative.c:946) 
[ 247.197114][ T44] ? __pfx___mutex_lock (kernel/locking/mutex.c:746) 
[ 247.197270][ T44] ? irqentry_exit (kernel/entry/common.c:311) 
[ 247.197425][ T44] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475) 
[ 247.197584][ T44] module_finalize (arch/x86/kernel/module.c:292) 
[ 247.197745][ T44] ? add_kallsyms (./include/linux/string.h:355 kernel/module/kallsyms.c:200) 
[ 247.197907][ T44] ? __pfx_module_finalize (arch/x86/kernel/module.c:241) 
[ 247.198062][ T44] ? __pfx_cmp_ex_sort (lib/extable.c:52) 
[ 247.198218][ T44] ? __pfx_swap_ex (lib/extable.c:28) 
[ 247.198372][ T44] load_module (kernel/module/main.c:2927 kernel/module/main.c:3422) 
[ 247.198527][ T44] ? __pfx_load_module (kernel/module/main.c:3327) 
[ 247.198681][ T44] ? kernel_read_file (fs/kernel_read_file.c:80 (discriminator 2)) 
[ 247.198843][ T44] ? kernel_read_file (./arch/x86/include/asm/atomic.h:53 ./include/linux/atomic/atomic-arch-fallback.h:992 ./include/linux/atomic/atomic-instrumented.h:436 ./include/linux/fs.h:3192 fs/kernel_read_file.c:122) 
[ 247.199006][ T44] ? __pfx_kernel_read_file (fs/kernel_read_file.c:38) 
[ 247.199163][ T44] ? init_module_from_file (kernel/module/main.c:3673) 
[ 247.199336][ T44] init_module_from_file (kernel/module/main.c:3673) 
[ 247.199491][ T44] ? __pfx_init_module_from_file (kernel/module/main.c:3649) 
[ 247.199684][ T44] ? idempotent_init_module (kernel/module/main.c:3685) 
[ 247.199852][ T44] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 247.200013][ T44] ? do_raw_spin_unlock (./arch/x86/include/asm/atomic.h:23 ./include/linux/atomic/atomic-arch-fallback.h:457 ./include/linux/atomic/atomic-instrumented.h:33 ./include/asm-generic/qspinlock.h:57 kernel/locking/spinlock_debug.c:101 kernel/locking/spinlock_debug.c:141) 
[ 247.200173][ T44] idempotent_init_module (kernel/module/main.c:3685) 
[ 247.200331][ T44] ? __pfx_idempotent_init_module (kernel/module/main.c:3677) 
[ 247.200523][ T44] ? cap_capable (security/commoncap.c:132) 
[ 247.200683][ T44] __x64_sys_finit_module (./include/linux/file.h:62 ./include/linux/file.h:83 kernel/module/main.c:3708 kernel/module/main.c:3695 kernel/module/main.c:3695) 
[ 247.200843][ T44] ? do_syscall_64 (./arch/x86/include/asm/irqflags.h:42 ./arch/x86/include/asm/irqflags.h:119 ./include/linux/entry-common.h:199 arch/x86/entry/syscall_64.c:90) 
[ 247.200998][ T44] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 247.201152][ T44] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[  247.201347][   T44] RIP: 0033:0x7f62353cae5d
[  247.201512][   T44] RSP: 002b:00007ffea2cc92a8 EFLAGS: 00000246 ORIG_RAX: 0000000000000139
[  247.201742][   T44] RAX: ffffffffffffffda RBX: 000055feb03d4c80 RCX: 00007f62353cae5d
[  247.201977][   T44] RDX: 0000000000000000 RSI: 000055fe8c405a2a RDI: 0000000000000000
[  247.202207][   T44] RBP: 0000000000040000 R08: 0000000000000000 R09: 00007ffea2cc93e0
[  247.202436][   T44] R10: 0000000000000000 R11: 0000000000000246 R12: 000055fe8c405a2a


Finger prints:
print_report:kasan_report:__kasan_check_byte:krealloc_noprof:emit_its_trampoline
__schedule:schedule:schedule_preempt_disabled:__mutex_lock:text_poke_set