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: 5 Comm: kworker/0:0 Not tainted 4.19.205-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 74 a9 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 4b a9 74 f9 31 f6 RSP: 0018:ffff8880b5a2fc48 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000000001 RSI: ffffffff87ede94c RDI: 0000000000000000 RBP: 0000000000000008 R08: 0000000000000000 R09: fffffbfff15cf858 R10: ffffffff8ae7c2c7 R11: 0000000000000000 R12: 0000000000000000 R13: ffffffff896f0b80 R14: ffff8880ba02a8c0 R15: ffff8880ba02f000 FS: 0000000000000000(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000970004 CR3: 000000009f639000 CR4: 00000000001426f0 FAULT_INJECTION: forcing a failure. name fail_page_alloc, interval 1, probability 0, space 0, times 0 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 CPU: 1 PID: 25232 Comm: syz-executor.1 Not tainted 4.19.205-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 netlink_sock_destruct+0x96/0x280 net/netlink/af_netlink.c:398 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1fc/0x2ef lib/dump_stack.c:118 __sk_destruct+0x4b/0x8a0 net/core/sock.c:1559 fail_dump lib/fault-inject.c:51 [inline] should_fail.cold+0xa/0xf lib/fault-inject.c:149 sk_destruct net/core/sock.c:1599 [inline] __sk_free+0x165/0x3b0 net/core/sock.c:1610 sk_free+0x3b/0x50 net/core/sock.c:1621 process_one_work+0x864/0x1570 kernel/workqueue.c:2153 should_fail_alloc_page mm/page_alloc.c:3088 [inline] prepare_alloc_pages mm/page_alloc.c:4346 [inline] __alloc_pages_nodemask+0x239/0x2890 mm/page_alloc.c:4393 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 b37ca9ec9b1f06ff ]--- RIP: 0010:klist_iter_exit+0x21/0x80 lib/klist.c:314 alloc_pages_current+0x193/0x2a0 mm/mempolicy.c:2197 Code: 66 0f 1f 84 00 00 00 00 00 41 54 55 53 48 89 fb e8 74 a9 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 4b a9 74 f9 31 f6 alloc_pages include/linux/gfp.h:532 [inline] rds_page_remainder_alloc+0x4e/0xcc0 net/rds/page.c:80 rds_message_copy_from_user+0x1c1/0xce0 net/rds/message.c:435 RSP: 0018:ffff8880b5a2fc48 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 rds_sendmsg+0x2130/0x2ea0 net/rds/send.c:1269 RDX: 0000000000000001 RSI: ffffffff87ede94c RDI: 0000000000000000 RBP: 0000000000000008 R08: 0000000000000000 R09: fffffbfff15cf858 R10: ffffffff8ae7c2c7 R11: 0000000000000000 R12: 0000000000000000 sock_sendmsg_nosec net/socket.c:651 [inline] sock_sendmsg+0xc3/0x120 net/socket.c:661 __sys_sendto+0x21a/0x320 net/socket.c:1897 R13: ffffffff896f0b80 R14: ffff8880ba02a8c0 R15: ffff8880ba02f000 FS: 0000000000000000(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 __do_sys_sendto net/socket.c:1909 [inline] __se_sys_sendto net/socket.c:1905 [inline] __x64_sys_sendto+0xdd/0x1b0 net/socket.c:1905 CR2: 00007f70e76ae718 CR3: 000000009c056000 CR4: 00000000001426f0 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4665f9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 c7 c1 bc ff ff ff f7 d8 64 89 01 48 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 RSP: 002b:00007f0df81ec188 EFLAGS: 00000246 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665f9 RDX: 000000000001a000 RSI: 0000000020002200 RDI: 0000000000000004 RBP: 00007f0df81ec1d0 R08: 0000000000000000 R09: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 R13: 00007ffedec50a5f R14: 00007f0df81ec300 R15: 0000000000022000 ---------------- 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 74 a9 74 f9 callq 0xf974a989 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 4b a9 74 f9 callq 0xf974a989 3e: 31 f6 xor %esi,%esi