======================================
| [   15.973912][  T292] ==================================================================
| [ 15.974260][ T292] 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) 
| [   15.974512][  T292] Read of size 1 at addr ffff888001932720 by task modprobe/292
| [   15.974758][  T292]
[   15.974850][  T292] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   15.974852][  T292] Call Trace:
[   15.974854][  T292]  <TASK>
[ 15.974856][ T292] dump_stack_lvl (lib/dump_stack.c:123) 
[ 15.974863][ T292] print_address_description.constprop.0 (mm/kasan/report.c:409) 
[ 15.974870][ T292] ? 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) 
[ 15.974874][ T292] print_report (mm/kasan/report.c:522) 
[ 15.974878][ T292] ? 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) 
[ 15.974881][ T292] ? kasan_addr_to_slab (./include/linux/mm.h:1178 mm/kasan/../slab.h:211 mm/kasan/common.c:38) 
[ 15.974885][ T292] ? 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) 
[ 15.974888][ T292] kasan_report (mm/kasan/report.c:636) 
[ 15.974892][ T292] ? 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) 
[ 15.974897][ T292] ? 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) 
[ 15.974900][ T292] __kasan_check_byte (mm/kasan/common.c:561) 
[ 15.974904][ T292] krealloc_noprof (mm/slub.c:4858 mm/slub.c:4958) 
[ 15.974908][ T292] ? execmem_alloc (mm/execmem.c:299 mm/execmem.c:383) 
[ 15.974915][ T292] 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) 
[ 15.974919][ T292] ? __x86_indirect_paranoid_thunk_rax (./arch/x86/include/asm/GEN-for-each-reg.h:6) 
[ 15.974925][ T292] ? __do_softirq (./arch/x86/include/asm/GEN-for-each-reg.h:6) 
[ 15.974929][ T292] apply_retpolines (arch/x86/kernel/alternative.c:994 (discriminator 3)) 
[ 15.974934][ T292] ? __pfx_apply_retpolines (arch/x86/kernel/alternative.c:946) 
[ 15.974938][ T292] ? __pfx___mutex_lock (kernel/locking/mutex.c:746) 
[ 15.974947][ T292] module_finalize (arch/x86/kernel/module.c:292) 
[ 15.974954][ T292] ? add_kallsyms (./include/linux/string.h:355 kernel/module/kallsyms.c:200) 
[ 15.974959][ T292] ? __pfx_module_finalize (arch/x86/kernel/module.c:241) 
[ 15.974964][ T292] ? __pfx_cmp_ex_sort (lib/extable.c:52) 
[ 15.974966][ T292] ? __pfx_swap_ex (lib/extable.c:28) 
[ 15.974971][ T292] load_module (kernel/module/main.c:2927 kernel/module/main.c:3422) 
[ 15.974977][ T292] ? __pfx_load_module (kernel/module/main.c:3327) 
[ 15.974980][ T292] ? kernel_read_file (fs/kernel_read_file.c:80 (discriminator 2)) 
[ 15.974987][ T292] ? 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) 
[ 15.974991][ T292] ? __pfx_kernel_read_file (fs/kernel_read_file.c:38) 
[ 15.974996][ T292] ? init_module_from_file (kernel/module/main.c:3673) 
[ 15.974999][ T292] init_module_from_file (kernel/module/main.c:3673) 
[ 15.975002][ T292] ? __pfx_init_module_from_file (kernel/module/main.c:3649) 
[ 15.975010][ T292] ? idempotent_init_module (kernel/module/main.c:3685) 
[ 15.975013][ T292] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 15.975017][ T292] ? 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) 
[ 15.975022][ T292] idempotent_init_module (kernel/module/main.c:3685) 
[ 15.975026][ T292] ? __pfx_idempotent_init_module (kernel/module/main.c:3677) 
[ 15.975033][ T292] ? cap_capable (security/commoncap.c:132) 
[ 15.975039][ T292] __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) 
[ 15.975042][ T292] ? 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) 
[ 15.975045][ T292] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 15.975049][ T292] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   15.975052][  T292] RIP: 0033:0x7f03d7c51e5d
[ 15.975056][ T292] 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
[   15.975059][  T292] RSP: 002b:00007ffe7fa14138 EFLAGS: 00000246 ORIG_RAX: 0000000000000139
[   15.975063][  T292] RAX: ffffffffffffffda RBX: 000055aad6314c80 RCX: 00007f03d7c51e5d
[   15.975065][  T292] RDX: 0000000000000000 RSI: 000055aaacbd7a2a RDI: 0000000000000000
[   15.975067][  T292] RBP: 0000000000040000 R08: 0000000000000000 R09: 00007ffe7fa14270
[   15.975069][  T292] R10: 0000000000000000 R11: 0000000000000246 R12: 000055aaacbd7a2a
[   15.975071][  T292] R13: 000055aad6314d40 R14: 000055aad6314dc0 R15: 000055aad6314cec
| [   15.994679][  T292]                                ^
| [   15.994841][  T292]  ffff888001932780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
| [   15.995084][  T292]  ffff888001932800: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 fc
| [   15.995332][  T292] ==================================================================
| [   15.995629][  T292] Disabling lock debugging due to kernel taint
[  247.181212][   T44] INFO: task modprobe:292 blocked for more than 122 seconds.
[  247.181583][   T44]       Tainted: G    B               6.16.0-rc2-virtme #1
[  247.181790][   T44] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[  247.182035][   T44] task:modprobe        state:D stack:25792 pid:292   tgid:292   ppid:37     task_flags:0x400100 flags:0x00004002
[  247.182396][   T44] Call Trace:
[  247.182516][   T44]  <TASK>
[ 247.182596][ T44] __schedule (kernel/sched/core.c:5396 kernel/sched/core.c:6785) 
[ 247.182751][ T44] ? __pfx___schedule (kernel/sched/core.c:6662) 
[ 247.182899][ T44] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 247.183097][ T44] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 247.183246][ T44] ? schedule (kernel/sched/core.c:6844 kernel/sched/core.c:6877) 
[ 247.183357][ T44] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 247.183517][ T44] schedule (kernel/sched/core.c:6864 kernel/sched/core.c:6878) 
[ 247.183626][ T44] schedule_preempt_disabled (kernel/sched/core.c:6936) 
[ 247.183770][ T44] __mutex_lock (kernel/locking/mutex.c:183 kernel/locking/mutex.c:681 kernel/locking/mutex.c:747) 
[ 247.183916][ T44] ? text_poke_set (arch/x86/kernel/alternative.c:2671) 
[ 247.184073][ T44] ? __pfx___mutex_lock (kernel/locking/mutex.c:746) 
[ 247.184230][ T44] ? execmem_free (mm/execmem.c:330 mm/execmem.c:398) 
[ 247.184372][ T44] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 247.184512][ T44] ? trace_lock_release (./include/trace/events/lock.h:69 (discriminator 21)) 
[ 247.184660][ T44] ? text_poke_set (arch/x86/kernel/alternative.c:2671) 
[ 247.184799][ T44] text_poke_set (arch/x86/kernel/alternative.c:2671) 
[ 247.184956][ T44] ? __pfx_text_poke_set (arch/x86/kernel/alternative.c:2663) 
[ 247.185106][ T44] execmem_free (mm/execmem.c:332 mm/execmem.c:398) 
[ 247.185251][ T44] ? __pfx_execmem_free (mm/execmem.c:391) 
[ 247.185393][ 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) 
[ 247.185538][ T44] ? __kasan_check_byte (mm/kasan/common.c:561) 
[ 247.185689][ T44] ? krealloc_noprof (mm/slub.c:4858 mm/slub.c:4958) 
[ 247.185832][ T44] ? execmem_alloc (mm/execmem.c:299 mm/execmem.c:383) 
[ 247.185976][ T44] emit_its_trampoline (arch/x86/kernel/alternative.c:266 arch/x86/kernel/alternative.c:808) 
[ 247.186127][ T44] ? __x86_indirect_paranoid_thunk_rax (./arch/x86/include/asm/GEN-for-each-reg.h:6) 
[ 247.186315][ T44] ? __do_softirq (./arch/x86/include/asm/GEN-for-each-reg.h:6) 
[ 247.186460][ T44] apply_retpolines (arch/x86/kernel/alternative.c:994 (discriminator 3)) 
[ 247.186605][ T44] ? __pfx_apply_retpolines (arch/x86/kernel/alternative.c:946) 
[ 247.186748][ T44] ? __pfx___mutex_lock (kernel/locking/mutex.c:746) 
[ 247.186901][ T44] module_finalize (arch/x86/kernel/module.c:292) 
[ 247.187048][ T44] ? add_kallsyms (./include/linux/string.h:355 kernel/module/kallsyms.c:200) 
[ 247.187202][ T44] ? __pfx_module_finalize (arch/x86/kernel/module.c:241) 
[ 247.187345][ T44] ? __pfx_cmp_ex_sort (lib/extable.c:52) 
[ 247.187488][ T44] ? __pfx_swap_ex (lib/extable.c:28) 
[ 247.187631][ T44] load_module (kernel/module/main.c:2927 kernel/module/main.c:3422) 
[ 247.187779][ T44] ? __pfx_load_module (kernel/module/main.c:3327) 
[ 247.187928][ T44] ? kernel_read_file (fs/kernel_read_file.c:80 (discriminator 2)) 
[ 247.188079][ 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) 
[ 247.188219][ T44] ? __pfx_kernel_read_file (fs/kernel_read_file.c:38) 
[ 247.188360][ T44] ? init_module_from_file (kernel/module/main.c:3673) 
[ 247.188499][ T44] init_module_from_file (kernel/module/main.c:3673) 
[ 247.188639][ T44] ? __pfx_init_module_from_file (kernel/module/main.c:3649) 
[ 247.188815][ T44] ? idempotent_init_module (kernel/module/main.c:3685) 
[ 247.188957][ T44] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 247.189103][ 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) 
[ 247.189244][ T44] idempotent_init_module (kernel/module/main.c:3685) 
[ 247.189402][ T44] ? __pfx_idempotent_init_module (kernel/module/main.c:3677) 
[ 247.189581][ T44] ? cap_capable (security/commoncap.c:132) 
[ 247.189726][ 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) 
[ 247.189868][ 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) 
[ 247.190016][ T44] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 247.190165][ T44] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[  247.190346][   T44] RIP: 0033:0x7f03d7c51e5d
[  247.190497][   T44] RSP: 002b:00007ffe7fa14138 EFLAGS: 00000246 ORIG_RAX: 0000000000000139
[  247.190743][   T44] RAX: ffffffffffffffda RBX: 000055aad6314c80 RCX: 00007f03d7c51e5d
[  247.190972][   T44] RDX: 0000000000000000 RSI: 000055aaacbd7a2a RDI: 0000000000000000
[  247.191197][   T44] RBP: 0000000000040000 R08: 0000000000000000 R09: 00007ffe7fa14270
[  247.191414][   T44] R10: 0000000000000000 R11: 0000000000000246 R12: 000055aaacbd7a2a


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