Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1c9/0x2b4 lib/dump_stack.c:113 fail_dump lib/fault-inject.c:51 [inline] should_fail.cold.4+0xa/0x11 lib/fault-inject.c:149 kasan: CONFIG_KASAN_INLINE enabled kasan: GPF could be caused by NULL-ptr deref or user memory access general protection fault: 0000 [#1] SMP KASAN CPU: 1 PID: 21958 Comm: syz-executor2 Not tainted 4.18.0-rc4-next-20180712+ #5 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__read_once_size include/linux/compiler.h:188 [inline] RIP: 0010:list_lru_from_memcg_idx mm/list_lru.c:56 [inline] RIP: 0010:list_lru_count_one+0x156/0x460 mm/list_lru.c:201 Code: 08 __should_failslab+0x124/0x180 mm/failslab.c:32 3c should_failslab+0x9/0x14 mm/slab_common.c:1557 03 slab_pre_alloc_hook mm/slab.h:423 [inline] slab_alloc mm/slab.c:3378 [inline] __do_kmalloc mm/slab.c:3716 [inline] __kmalloc_track_caller+0x2c4/0x760 mm/slab.c:3733 0f 8e b5 02 00 00 kstrdup+0x39/0x70 mm/util.c:56 4d parse_opts net/9p/client.c:162 [inline] p9_client_create+0x48f/0x1770 net/9p/client.c:1040 63 bd d8 0a 00 00 e8 ef 35 d2 ff 48 8d 7b 50 48 b8 00 00 00 00 00 fc ff df 48 89 v9fs_session_init+0x21a/0x1a80 fs/9p/v9fs.c:400 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 d8 02 00 00 49 8d v9fs_mount+0x7c/0x900 fs/9p/vfs_super.c:135 46 c0 legacy_get_tree+0x118/0x440 fs/fs_context.c:659 4c vfs_get_tree+0x1cb/0x5c0 fs/super.c:1743 8b do_new_mount fs/namespace.c:2567 [inline] do_mount+0x6c1/0x1fb0 fs/namespace.c:2889 6b 50 48 ba 00 00 RSP: 0000:ffff8801940af220 EFLAGS: 00010206 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff81aa39a4 RDX: 000000000000000a RSI: ffffffff81aa3a11 RDI: 0000000000000050 ksys_mount+0x12d/0x140 fs/namespace.c:3105 RBP: ffff8801940af2b0 R08: ffff8801c86c4500 R09: 0000000000000000 R10: 0000000000000000 R11: dffffc0000000000 R12: 1ffff10032815e45 __do_sys_mount fs/namespace.c:3119 [inline] __se_sys_mount fs/namespace.c:3116 [inline] __x64_sys_mount+0xbe/0x150 fs/namespace.c:3116 R13: ffff8801ce1bea00 R14: ffff8801940af288 R15: 0000000000000006 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 FS: 0000000000c3f940(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f59aa11adb8 CR3: 000000019ba75000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: list_lru_shrink_count include/linux/list_lru.h:122 [inline] super_cache_count+0x153/0x2e0 fs/super.c:146 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x455a79 do_shrink_slab+0x148/0xc50 mm/vmscan.c:458 Code: 1d ba fb ff c3 66 2e 0f 1f 84 shrink_slab_memcg mm/vmscan.c:598 [inline] shrink_slab+0x861/0xa60 mm/vmscan.c:671 00 00 00 00 00 66 90 48 shrink_node+0x429/0x16a0 mm/vmscan.c:2735 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 shrink_zones mm/vmscan.c:2964 [inline] do_try_to_free_pages+0x3e7/0x1290 mm/vmscan.c:3026 c2 4d 89 try_to_free_mem_cgroup_pages+0x49d/0xc90 mm/vmscan.c:3324 c8 4c 8b 4c 24 08 0f 05 <48> 3d reclaim_high.constprop.73+0x137/0x1e0 mm/memcontrol.c:2060 01 f0 ff ff 0f 83 mem_cgroup_handle_over_high+0x8d/0x130 mm/memcontrol.c:2085 eb tracehook_notify_resume include/linux/tracehook.h:195 [inline] exit_to_usermode_loop+0x287/0x380 arch/x86/entry/common.c:166 b9 fb ff c3 prepare_exit_to_usermode+0x342/0x3b0 arch/x86/entry/common.c:197 66 2e 0f 1f 84 00 retint_user+0x8/0x18 00 00 RIP: 0033:0x4583ed 00 Code: RSP: 002b:00007f7d1331cc68 EFLAGS: 00000246 5b ORIG_RAX: 00000000000000a5 5d f3 RAX: ffffffffffffffda RBX: 00007f7d1331d6d4 RCX: 0000000000455a79 c3 RDX: 0000000020000100 RSI: 0000000020000480 RDI: 0000000000000000 66 0f RBP: 000000000072bea0 R08: 00000000200004c0 R09: 0000000000000000 1f 84 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000016 R13: 00000000004c01c1 R14: 00000000004cfe10 R15: 0000000000000010 00 00 00 00 00 48 c7 c0 ea ff ff ff 48 85 ff 0f 84 90 90 fb ff 48 85 f6 0f 84 87 90 fb ff 48 83 ee 10 <48> 89 4e 08 48 89 3e 48 89 d7 4c 89 c2 4d 89 c8 4c 8b 54 24 08 b8 RSP: 002b:00007ffce40f1278 EFLAGS: 00010202 RAX: ffffffffffffffea RBX: 00007f59aa11b700 RCX: 00007f59aa11b700 RDX: 00000000003d0f00 RSI: 00007f59aa11adb0 RDI: 000000000040cba0 RBP: 00007ffce40f13b0 R08: 00007f59aa11b9d0 R09: 00007f59aa11b700 R10: 00007f59aa11adc0 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffce40f132f R14: 00007f59aa11b9c0 R15: 0000000000000001 Modules linked in: Dumping ftrace buffer: (ftrace buffer empty) ---[ end trace 2f778dfe4b55e14a ]--- RIP: 0010:__read_once_size include/linux/compiler.h:188 [inline] RIP: 0010:list_lru_from_memcg_idx mm/list_lru.c:56 [inline] RIP: 0010:list_lru_count_one+0x156/0x460 mm/list_lru.c:201 Code: 08 3c 03 0f 8e b5 02 00 00 4d 63 bd d8 0a 00 00 e8 ef 35 d2 ff 48 8d 7b 50 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 d8 02 00 00 49 8d 46 c0 4c 8b 6b 50 48 ba 00 00 RSP: 0000:ffff8801940af220 EFLAGS: 00010206 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff81aa39a4 RDX: 000000000000000a RSI: ffffffff81aa3a11 RDI: 0000000000000050 RBP: ffff8801940af2b0 R08: ffff8801c86c4500 R09: 0000000000000000 R10: 0000000000000000 R11: dffffc0000000000 R12: 1ffff10032815e45 R13: ffff8801ce1bea00 R14: ffff8801940af288 R15: 0000000000000006 FS: 0000000000c3f940(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f59aa11adb8 CR3: 000000019ba75000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400