Oops: general protection fault, probably for non-canonical address 0xdffffc000cf6d7c2: 0000 [#1] PREEMPT SMP KASAN NOPTI
KASAN: probably user-memory-access in range [0x0000000067b6be10-0x0000000067b6be17]
CPU: 0 UID: 0 PID: 5846 Comm: syz-executor Not tainted 6.14.0-rc3-syzkaller-g87a132e73910 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
RIP: 0010:__hlist_del include/linux/list.h:980 [inline]
RIP: 0010:hlist_del_init_rcu include/linux/rculist.h:228 [inline]
RIP: 0010:proc_invalidate_siblings_dcache+0x16e/0x6e0 fs/proc/inode.c:120
Code: 00 00 00 00 fc ff df 80 3c 08 00 74 08 4c 89 e7 e8 57 77 c6 ff 4d 8b 34 24 4c 89 f8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <80> 3c 08 00 74 08 4c 89 ff e8 24 78 c6 ff 4d 89 37 4d 85 f6 74 38
RSP: 0018:ffffc9000ccef740 EFLAGS: 00010203
RAX: 000000000cf6d7c2 RBX: 1ffff110084748b1 RCX: dffffc0000000000
RDX: dffffc0000000000 RSI: 0000000000000004 RDI: ffffc9000ccef6c0
RBP: ffff8880423a4588 R08: 0000000000000003 R09: fffff5200199ded8
R10: dffffc0000000000 R11: fffff5200199ded8 R12: ffff8880423a4580
R13: ffffffff82627f1b R14: 0000000067b6be15 R15: 0000000067b6be15
FS:  000055557b468500(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffd59011d40 CR3: 000000004ab32000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 release_task+0x168e/0x1830 kernel/exit.c:279
 wait_task_zombie kernel/exit.c:1249 [inline]
 wait_consider_task+0x1a14/0x2e60 kernel/exit.c:1476
 do_wait_thread kernel/exit.c:1539 [inline]
 __do_wait+0x1b0/0x850 kernel/exit.c:1657
 do_wait+0x1e9/0x550 kernel/exit.c:1691
 kernel_wait4+0x2a7/0x3e0 kernel/exit.c:1850
 __do_sys_wait4 kernel/exit.c:1878 [inline]
 __se_sys_wait4 kernel/exit.c:1874 [inline]
 __x64_sys_wait4+0x134/0x1e0 kernel/exit.c:1874
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f620db83057
Code: 89 7c 24 10 48 89 4c 24 18 e8 45 1b 03 00 4c 8b 54 24 18 8b 54 24 14 41 89 c0 48 8b 74 24 08 8b 7c 24 10 b8 3d 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 31 44 89 c7 89 44 24 10 e8 95 1b 03 00 8b 44
RSP: 002b:00007ffd590126a0 EFLAGS: 00000293 ORIG_RAX: 000000000000003d
RAX: ffffffffffffffda RBX: 000000000000002f RCX: 00007f620db83057
RDX: 0000000040000001 RSI: 00007ffd5901270c RDI: 00000000ffffffff
RBP: 00007ffd5901270c R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000016
R13: 000000000000005b R14: 0000000000038661 R15: 00007ffd59012760
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__hlist_del include/linux/list.h:980 [inline]
RIP: 0010:hlist_del_init_rcu include/linux/rculist.h:228 [inline]
RIP: 0010:proc_invalidate_siblings_dcache+0x16e/0x6e0 fs/proc/inode.c:120
Code: 00 00 00 00 fc ff df 80 3c 08 00 74 08 4c 89 e7 e8 57 77 c6 ff 4d 8b 34 24 4c 89 f8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <80> 3c 08 00 74 08 4c 89 ff e8 24 78 c6 ff 4d 89 37 4d 85 f6 74 38
RSP: 0018:ffffc9000ccef740 EFLAGS: 00010203
RAX: 000000000cf6d7c2 RBX: 1ffff110084748b1 RCX: dffffc0000000000
RDX: dffffc0000000000 RSI: 0000000000000004 RDI: ffffc9000ccef6c0
RBP: ffff8880423a4588 R08: 0000000000000003 R09: fffff5200199ded8
R10: dffffc0000000000 R11: fffff5200199ded8 R12: ffff8880423a4580
R13: ffffffff82627f1b R14: 0000000067b6be15 R15: 0000000067b6be15
FS:  000055557b468500(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffd59011d40 CR3: 000000004ab32000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess), 6 bytes skipped:
   0:	df 80 3c 08 00 74    	filds  0x7400083c(%rax)
   6:	08 4c 89 e7          	or     %cl,-0x19(%rcx,%rcx,4)
   a:	e8 57 77 c6 ff       	call   0xffc67766
   f:	4d 8b 34 24          	mov    (%r12),%r14
  13:	4c 89 f8             	mov    %r15,%rax
  16:	48 c1 e8 03          	shr    $0x3,%rax
  1a:	48 b9 00 00 00 00 00 	movabs $0xdffffc0000000000,%rcx
  21:	fc ff df
* 24:	80 3c 08 00          	cmpb   $0x0,(%rax,%rcx,1) <-- trapping instruction
  28:	74 08                	je     0x32
  2a:	4c 89 ff             	mov    %r15,%rdi
  2d:	e8 24 78 c6 ff       	call   0xffc67856
  32:	4d 89 37             	mov    %r14,(%r15)
  35:	4d 85 f6             	test   %r14,%r14
  38:	74 38                	je     0x72