general protection fault in klist_iter

Kernel	Title	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
linux-4.19	general protection fault in klist_iter_exit	C		error	89	605d	1108d	0/1	upstream: reported C repro on 2021/04/12 19:06
android-54	general protection fault in klist_iter_exit				1	853d	853d	0/2	auto-closed as invalid on 2022/04/22 15:11
upstream	general protection fault in klist_iter_exit net nfc	C	unreliable	inconclusive	54	838d	1145d	0/26	auto-obsoleted due to no activity on 2022/09/16 23:48
android-5-10	general protection fault in klist_iter_exit	C	error		5	865d	902d	1/2	fixed on 2021/12/20 18:14

kasan: CONFIG_KASAN_INLINE enabled kasan: GPF could be caused by NULL-ptr deref or user memory access general protection fault: 0000 [#1] PREEMPT SMP KASAN Modules linked in: CPU: 0 PID: 9169 Comm: kworker/0:4 Not tainted 4.14.256-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: events netlink_sock_destruct_work task: ffff8880992b8200 task.stack: ffff888099260000 RIP: 0010:klist_iter_exit+0x21/0x80 lib/klist.c:314 RSP: 0018:ffff888099267c80 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000000001 RSI: 0000000000000001 RDI: 0000000000000000 RBP: 0000000000000008 R08: 0000000000000000 R09: 0000000000040173 R10: ffff8880992b8ad8 R11: ffff8880992b8200 R12: 0000000000000000 R13: ffffffff88724a60 R14: ffff8880ba433b00 R15: ffff8880ba438000 FS: 0000000000000000(0000) GS:ffff8880ba400000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f42687aa906 CR3: 000000009ec42000 CR4: 00000000003406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: nfc_device_iter_exit net/nfc/nfc.h:133 [inline] nfc_genl_dump_devices_done+0x31/0x50 net/nfc/netlink.c:669 genl_lock_done+0x82/0xc0 net/netlink/genetlink.c:494 netlink_sock_destruct+0x8b/0x250 net/netlink/af_netlink.c:366 __sk_destruct+0x49/0x760 net/core/sock.c:1574 sk_destruct net/core/sock.c:1615 [inline] __sk_free+0xd9/0x2d0 net/core/sock.c:1623 sk_free+0x2b/0x40 net/core/sock.c:1634 process_one_work+0x793/0x14a0 kernel/workqueue.c:2117 worker_thread+0x5cc/0xff0 kernel/workqueue.c:2251 kthread+0x30d/0x420 kernel/kthread.c:232 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404 Code: ff 66 0f 1f 84 00 00 00 00 00 41 54 55 53 48 89 fb e8 04 bc 57 fa 48 8d 6b 08 48 b8 00 00 00 00 00 fc ff df 48 89 ea 48 c1 ea 03 <80> 3c 02 00 75 40 4c 8b 63 08 4d 85 e4 74 2e e8 db bb 57 fa 31 RIP: klist_iter_exit+0x21/0x80 lib/klist.c:314 RSP: ffff888099267c80 ---[ end trace 0fccd39209cdc354 ]--- ---------------- Code disassembly (best guess), 1 bytes skipped: 0: 66 0f 1f 84 00 00 00 nopw 0x0(%rax,%rax,1) 7: 00 00 9: 41 54 push %r12 b: 55 push %rbp c: 53 push %rbx d: 48 89 fb mov %rdi,%rbx 10: e8 04 bc 57 fa callq 0xfa57bc19 15: 48 8d 6b 08 lea 0x8(%rbx),%rbp 19: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 20: fc ff df 23: 48 89 ea mov %rbp,%rdx 26: 48 c1 ea 03 shr $0x3,%rdx * 2a: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) <-- trapping instruction 2e: 75 40 jne 0x70 30: 4c 8b 63 08 mov 0x8(%rbx),%r12 34: 4d 85 e4 test %r12,%r12 37: 74 2e je 0x67 39: e8 db bb 57 fa callq 0xfa57bc19 3e: 31 .byte 0x31