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 CPU: 0 PID: 20758 Comm: kworker/0:1 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: events netlink_sock_destruct_work RIP: 0010:klist_iter_exit+0x21/0x80 lib/klist.c:314 Code: 66 0f 1f 84 00 00 00 00 00 41 54 55 53 48 89 fb e8 34 69 74 f9 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 0b 69 74 f9 31 f6 RSP: 0018:ffff88804c3dfc48 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000000001 RSI: ffffffff87ee1c3c RDI: 0000000000000000 RBP: 0000000000000008 R08: 0000000000000000 R09: fffffbfff15cf8ac R10: ffffffff8ae7c567 R11: 0000000000000000 R12: 0000000000000000 R13: ffffffff896f11a0 R14: ffff8880ba02a8c0 R15: ffff8880ba02f000 FS: 0000000000000000(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fbe0460e000 CR3: 000000009e161000 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:658 genl_lock_done+0x82/0xc0 net/netlink/genetlink.c:495 netlink_sock_destruct+0x96/0x280 net/netlink/af_netlink.c:398 __sk_destruct+0x4b/0x8a0 net/core/sock.c:1576 sk_destruct net/core/sock.c:1617 [inline] __sk_free+0x165/0x3b0 net/core/sock.c:1628 sk_free+0x3b/0x50 net/core/sock.c:1639 process_one_work+0x864/0x1570 kernel/workqueue.c:2153 worker_thread+0x64c/0x1130 kernel/workqueue.c:2296 kthread+0x33f/0x460 kernel/kthread.c:259 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 Modules linked in: ---[ end trace fe49dfe2e3b9a12f ]--- RIP: 0010:klist_iter_exit+0x21/0x80 lib/klist.c:314 Code: 66 0f 1f 84 00 00 00 00 00 41 54 55 53 48 89 fb e8 34 69 74 f9 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 0b 69 74 f9 31 f6 RSP: 0018:ffff88804c3dfc48 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000000001 RSI: ffffffff87ee1c3c RDI: 0000000000000000 RBP: 0000000000000008 R08: 0000000000000000 R09: fffffbfff15cf8ac R10: ffffffff8ae7c567 R11: 0000000000000000 R12: 0000000000000000 EXT4-fs (loop5): VFS: Found ext4 filesystem with invalid superblock checksum. Run e2fsck? EXT4-fs (loop4): VFS: Found ext4 filesystem with invalid superblock checksum. Run e2fsck? R13: ffffffff896f11a0 R14: ffff8880ba02a8c0 R15: ffff8880ba02f000 FS: 0000000000000000(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000c01b6eb000 CR3: 0000000054298000 CR4: 00000000003406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 EXT4-fs (loop5): VFS: Found ext4 filesystem with invalid superblock checksum. Run e2fsck? ---------------- Code disassembly (best guess): 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 34 69 74 f9 callq 0xf9746949 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 0b 69 74 f9 callq 0xf9746949 3e: 31 f6 xor %esi,%esi