------------[ cut here ]------------
task_rq(p) != rq
WARNING: kernel/sched/fair.c:7656 at hrtick_start_fair+0x196/0x1f0 kernel/sched/fair.c:7656, CPU#0: syz.0.19/5970
Modules linked in:
CPU: 0 UID: 0 PID: 5970 Comm: syz.0.19 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
RIP: 0010:hrtick_start_fair+0x196/0x1f0 kernel/sched/fair.c:7656
Code: 42 80 3c 20 00 74 08 4c 89 ff e8 c5 e5 97 00 4d 39 37 0f 85 0c ff ff ff 48 89 df 5b 41 5c 41 5d 41 5e 41 5f e9 7b 64 fa ff 90 <0f> 0b 90 e9 d1 fe ff ff 44 89 f9 80 e1 07 80 c1 03 38 c1 0f 8c 82
RSP: 0018:ffffc90003ceefe0 EFLAGS: 00010087
RAX: ffff8880b873ba40 RBX: ffff8880b863ba40 RCX: ffffffff819778ae
RDX: 0000000000000000 RSI: ffff88802c7fbe00 RDI: ffff8880b863ba40
RBP: dffffc0000000000 R08: ffffffff8f8d5d0f R09: 1ffffffff1f1aba1
R10: dffffc0000000000 R11: fffffbfff1f1aba2 R12: dffffc0000000000
R13: 1ffff110170c78d6 R14: ffff88802c7fbe00 R15: ffffffff8d9027d8
FS:  0000000000000000(0000) GS:ffff888125ebb000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f004e67e000 CR3: 000000003d1c8000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 set_next_task_fair+0xa68/0xce0 kernel/sched/fair.c:15065
 put_prev_set_next_task kernel/sched/sched.h:2770 [inline]
 pick_next_task kernel/sched/core.c:6442 [inline]
 __schedule+0x3e03/0x5550 kernel/sched/core.c:7143
 preempt_schedule_irq+0x4d/0xa0 kernel/sched/core.c:7552
 irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:539 [inline]
 irqentry_exit+0x14f/0x8c0 kernel/entry/common.c:167
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:unwind_next_frame+0xf37/0x2550 arch/x86/kernel/unwind_orc.c:-1
Code: 4c 8b 64 24 18 74 08 48 89 df e8 34 3e ba 00 4c 89 23 ba 10 00 00 00 48 8b 5c 24 28 48 89 df 31 f6 e8 fd 3f ba 00 48 8b 3c 24 <e9> d0 04 00 00 4c 89 64 24 18 4d 8d 6e 08 4d 89 ec 49 c1 ec 03 41
RSP: 0018:ffffc90003cef398 EFLAGS: 00000246
RAX: ffffc90003cef4b8 RBX: ffffc90003cef4b8 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff902a1a1c
RBP: dffffc0000000000 R08: ffffc90003cef4c7 R09: 0000000000000000
R10: ffffc90003cef4b8 R11: fffff5200079de99 R12: ffffc90003cef7f0
R13: 1ffff9200079de8f R14: ffffc90003cef468 R15: ffffc90003cef4b0
 arch_stack_walk+0x11b/0x150 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0xa9/0x100 kernel/stacktrace.c:122
 kasan_save_stack mm/kasan/common.c:57 [inline]
 kasan_save_track+0x3e/0x80 mm/kasan/common.c:78
 kasan_save_free_info+0x46/0x50 mm/kasan/generic.c:584
 poison_slab_object mm/kasan/common.c:253 [inline]
 __kasan_slab_free+0x5c/0x80 mm/kasan/common.c:285
 kasan_slab_free include/linux/kasan.h:235 [inline]
 slab_free_hook mm/slub.c:2700 [inline]
 free_to_pcs_bulk mm/slub.c:6130 [inline]
 kmem_cache_free_bulk+0x660/0x1260 mm/slub.c:7063
 mt_free_bulk lib/maple_tree.c:144 [inline]
 mt_destroy_walk+0x147/0x810 lib/maple_tree.c:4767
 mte_destroy_walk lib/maple_tree.c:4816 [inline]
 __mt_destroy+0x1cb/0x280 lib/maple_tree.c:6223
 exit_mmap+0x4c1/0x9e0 mm/mmap.c:1323
 __mmput+0xcb/0x3e0 kernel/fork.c:1182
 exit_mm+0x18e/0x250 kernel/exit.c:610
 do_exit+0x6a2/0x22c0 kernel/exit.c:992
 do_group_exit+0x21b/0x2d0 kernel/exit.c:1147
 __do_sys_exit_group kernel/exit.c:1158 [inline]
 __se_sys_exit_group kernel/exit.c:1156 [inline]
 __x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1156
 x64_sys_call+0x221a/0x2240 arch/x86/include/generated/asm/syscalls_64.h:232
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fbd8196ce59
Code: Unable to access opcode bytes at 0x7fbd8196ce2f.
RSP: 002b:00007ffc58f74508 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fbd8196ce59
RDX: 0000000000000064 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007ffc58f7456c R08: 0000000000000000 R09: 00000000000927c0
R10: 0000000000000001 R11: 0000000000000246 R12: 0000000000000002
R13: 00000000000927c0 R14: 000000000001f682 R15: 00007ffc58f745c0
 </TASK>
----------------
Code disassembly (best guess):
   0:	4c 8b 64 24 18       	mov    0x18(%rsp),%r12
   5:	74 08                	je     0xf
   7:	48 89 df             	mov    %rbx,%rdi
   a:	e8 34 3e ba 00       	call   0xba3e43
   f:	4c 89 23             	mov    %r12,(%rbx)
  12:	ba 10 00 00 00       	mov    $0x10,%edx
  17:	48 8b 5c 24 28       	mov    0x28(%rsp),%rbx
  1c:	48 89 df             	mov    %rbx,%rdi
  1f:	31 f6                	xor    %esi,%esi
  21:	e8 fd 3f ba 00       	call   0xba4023
  26:	48 8b 3c 24          	mov    (%rsp),%rdi
* 2a:	e9 d0 04 00 00       	jmp    0x4ff <-- trapping instruction
  2f:	4c 89 64 24 18       	mov    %r12,0x18(%rsp)
  34:	4d 8d 6e 08          	lea    0x8(%r14),%r13
  38:	4d 89 ec             	mov    %r13,%r12
  3b:	49 c1 ec 03          	shr    $0x3,%r12
  3f:	41                   	rex.B