device ipvlan1 left promiscuous mode 9pnet: Found fid 0 not clunked ================================================================== BUG: KASAN: use-after-free in p9_client_clunk+0x1fc/0x240 net/9p/client.c:1505 CPU: 1 PID: 16512 Comm: syz-executor.3 Not tainted 4.14.232-syzkaller #0 Read of size 8 at addr ffff8880a1d23a00 by task syz-executor.2/16483 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x1b2/0x281 lib/dump_stack.c:58 fail_dump lib/fault-inject.c:51 [inline] should_fail.cold+0x10a/0x149 lib/fault-inject.c:149 should_failslab+0xd6/0x130 mm/failslab.c:32 slab_pre_alloc_hook mm/slab.h:421 [inline] slab_alloc mm/slab.c:3376 [inline] __do_kmalloc mm/slab.c:3718 [inline] __kmalloc_track_caller+0x2bc/0x400 mm/slab.c:3735 kmemdup+0x23/0x50 mm/util.c:118 kmemdup include/linux/string.h:449 [inline] dh_data_from_key+0x146/0x250 security/keys/dh.c:46 __keyctl_dh_compute+0x454/0x1350 security/keys/dh.c:310 keyctl_dh_compute+0x98/0xe0 security/keys/dh.c:434 SYSC_keyctl security/keys/keyctl.c:1805 [inline] SyS_keyctl+0xe0/0x390 security/keys/keyctl.c:1701 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x4665f9 RSP: 002b:00007f82595d4188 EFLAGS: 00000246 ORIG_RAX: 00000000000000fa RAX: ffffffffffffffda RBX: 000000000056bf60 RCX: 00000000004665f9 RDX: 0000000020000540 RSI: 0000000020000140 RDI: 0000000000000017 RBP: 00007f82595d41d0 R08: 0000000020000840 R09: 0000000000000000 R10: 00000000000000ec R11: 0000000000000246 R12: 0000000000000001 R13: 00007fff0410c05f R14: 00007f82595d4300 R15: 0000000000022000 CPU: 0 PID: 16483 Comm: syz-executor.2 Not tainted 4.14.232-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x1b2/0x281 lib/dump_stack.c:58 print_address_description.cold+0x54/0x1d3 mm/kasan/report.c:252 kasan_report_error.cold+0x8a/0x191 mm/kasan/report.c:351 kasan_report mm/kasan/report.c:409 [inline] __asan_report_load8_noabort+0x68/0x70 mm/kasan/report.c:430 p9_client_clunk+0x1fc/0x240 net/9p/client.c:1505 9pnet: Insufficient options for proto=fd v9fs_mount+0x69f/0x860 fs/9p/vfs_super.c:200 mount_fs+0x92/0x2a0 fs/super.c:1237 vfs_kern_mount.part.0+0x5b/0x470 fs/namespace.c:1046 vfs_kern_mount fs/namespace.c:1036 [inline] do_new_mount fs/namespace.c:2549 [inline] do_mount+0xe53/0x2a00 fs/namespace.c:2879 SYSC_mount fs/namespace.c:3095 [inline] SyS_mount+0xa8/0x120 fs/namespace.c:3072 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x4665f9 RSP: 002b:00007fa32da9b188 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 000000000056bf60 RCX: 00000000004665f9 RDX: 0000000020000200 RSI: 0000000020000000 RDI: 0000000000000000 RBP: 00007fa32da9b1d0 R08: 00000000200002c0 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000002 R13: 00007ffe5485c20f R14: 00007fa32da9b300 R15: 0000000000022000 Allocated by task 16483: save_stack mm/kasan/kasan.c:447 [inline] set_track mm/kasan/kasan.c:459 [inline] kasan_kmalloc+0xeb/0x160 mm/kasan/kasan.c:551 kmem_cache_alloc_trace+0x131/0x3d0 mm/slab.c:3618 kmalloc include/linux/slab.h:488 [inline] p9_fid_create+0x47/0x3a0 net/9p/client.c:918 p9_client_attach+0x6d/0x750 net/9p/client.c:1158 v9fs_session_init+0xc03/0x1540 fs/9p/v9fs.c:471 v9fs_mount+0x73/0x860 fs/9p/vfs_super.c:135 mount_fs+0x92/0x2a0 fs/super.c:1237 vfs_kern_mount.part.0+0x5b/0x470 fs/namespace.c:1046 vfs_kern_mount fs/namespace.c:1036 [inline] do_new_mount fs/namespace.c:2549 [inline] do_mount+0xe53/0x2a00 fs/namespace.c:2879 SYSC_mount fs/namespace.c:3095 [inline] SyS_mount+0xa8/0x120 fs/namespace.c:3072 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb xt_addrtype: ipv6 does not support BROADCAST matching Freed by task 16483: save_stack mm/kasan/kasan.c:447 [inline] set_track mm/kasan/kasan.c:459 [inline] kasan_slab_free+0xc3/0x1a0 mm/kasan/kasan.c:524 __cache_free mm/slab.c:3496 [inline] kfree+0xc9/0x250 mm/slab.c:3815 p9_client_destroy.cold+0x67/0xaa net/9p/client.c:1121 v9fs_session_close+0x45/0x2c0 fs/9p/v9fs.c:511 xt_addrtype: ipv6 does not support BROADCAST matching v9fs_kill_super+0x49/0x90 fs/9p/vfs_super.c:233 deactivate_locked_super+0x6c/0xd0 fs/super.c:319 sget_userns+0x9c4/0xc10 fs/super.c:537 sget+0xd1/0x110 fs/super.c:572 v9fs_mount+0x9e/0x860 fs/9p/vfs_super.c:141 mount_fs+0x92/0x2a0 fs/super.c:1237 vfs_kern_mount.part.0+0x5b/0x470 fs/namespace.c:1046 vfs_kern_mount fs/namespace.c:1036 [inline] do_new_mount fs/namespace.c:2549 [inline] do_mount+0xe53/0x2a00 fs/namespace.c:2879 SYSC_mount fs/namespace.c:3095 [inline] SyS_mount+0xa8/0x120 fs/namespace.c:3072 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb The buggy address belongs to the object at ffff8880a1d23a00 which belongs to the cache kmalloc-96 of size 96 The buggy address is located 0 bytes inside of 96-byte region [ffff8880a1d23a00, ffff8880a1d23a60) The buggy address belongs to the page: page:ffffea00028748c0 count:1 mapcount:0 mapping:ffff8880a1d23000 index:0x0 flags: 0xfff00000000100(slab) raw: 00fff00000000100 ffff8880a1d23000 0000000000000000 0000000100000020 raw: ffffea00028671a0 ffffea0002858e60 ffff88813fe804c0 0000000000000000 page dumped because: kasan: bad access detected device ipvlan1 entered promiscuous mode Memory state around the buggy address: ffff8880a1d23900: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc ffff8880a1d23980: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc >ffff8880a1d23a00: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc ^ ffff8880a1d23a80: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc ffff8880a1d23b00: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc 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