memory leak in genl_family_rcv_msg_attrs

memory leak in genl_family_rcv_msg_attrs_parse
Status: upstream: reported syz repro on 2019/12/22 05:25
Reported-by: syzbot+4d763213368ad8d5a49f@syzkaller.appspotmail.com
First crash: 596d, last: 592d

Sample crash report:
2019/12/21 18:57:43 executed programs: 1
BUG: memory leak
unreferenced object 0xffff888122a69800 (size 2048):
  comm "syz-executor.0", pid 7220, jiffies 4295041795 (age 12.350s)
  hex dump (first 32 bytes):
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
  backtrace:
    [<00000000ea56780b>] kmemleak_alloc_recursive include/linux/kmemleak.h:43 [inline]
    [<00000000ea56780b>] slab_post_alloc_hook mm/slab.h:586 [inline]
    [<00000000ea56780b>] slab_alloc mm/slab.c:3320 [inline]
    [<00000000ea56780b>] __do_kmalloc mm/slab.c:3654 [inline]
    [<00000000ea56780b>] __kmalloc+0x169/0x300 mm/slab.c:3665
    [<000000005867ad5d>] kmalloc_array include/linux/slab.h:598 [inline]
    [<000000005867ad5d>] genl_family_rcv_msg_attrs_parse+0x12a/0x160 net/netlink/genetlink.c:490
    [<00000000b300803a>] genl_family_rcv_msg_dumpit net/netlink/genetlink.c:588 [inline]
    [<00000000b300803a>] genl_family_rcv_msg net/netlink/genetlink.c:714 [inline]
    [<00000000b300803a>] genl_rcv_msg+0x356/0x580 net/netlink/genetlink.c:734
    [<000000007aa7803c>] netlink_rcv_skb+0x61/0x170 net/netlink/af_netlink.c:2477
    [<00000000cf0291ee>] genl_rcv+0x29/0x40 net/netlink/genetlink.c:745
    [<00000000d9eda8cf>] netlink_unicast_kernel net/netlink/af_netlink.c:1302 [inline]
    [<00000000d9eda8cf>] netlink_unicast+0x223/0x310 net/netlink/af_netlink.c:1328
    [<00000000d87050ed>] netlink_sendmsg+0x2c0/0x570 net/netlink/af_netlink.c:1917
    [<0000000073d32856>] sock_sendmsg_nosec net/socket.c:639 [inline]
    [<0000000073d32856>] sock_sendmsg+0x54/0x70 net/socket.c:659
    [<00000000c88230c3>] ____sys_sendmsg+0x2d0/0x300 net/socket.c:2330
    [<00000000119fa4e9>] ___sys_sendmsg+0x8a/0xd0 net/socket.c:2384
    [<00000000196367bc>] __sys_sendmsg+0x80/0xf0 net/socket.c:2417
    [<0000000022242f1e>] __do_sys_sendmsg net/socket.c:2426 [inline]
    [<0000000022242f1e>] __se_sys_sendmsg net/socket.c:2424 [inline]
    [<0000000022242f1e>] __x64_sys_sendmsg+0x23/0x30 net/socket.c:2424
    [<000000007b63ee83>] do_syscall_64+0x73/0x220 arch/x86/entry/common.c:294
    [<00000000447890a9>] entry_SYSCALL_64_after_hwframe+0x44/0xa9

BUG: memory leak
unreferenced object 0xffff88811cf4a1c0 (size 32):
  comm "syz-executor.0", pid 7220, jiffies 4295041795 (age 12.350s)
  hex dump (first 32 bytes):
    c0 a7 16 84 ff ff ff ff 30 0c b2 83 ff ff ff ff  ........0.......
    00 98 a6 22 81 88 ff ff 00 00 00 00 00 00 00 00  ..."............
  backtrace:
    [<00000000e670bd2f>] kmemleak_alloc_recursive include/linux/kmemleak.h:43 [inline]
    [<00000000e670bd2f>] slab_post_alloc_hook mm/slab.h:586 [inline]
    [<00000000e670bd2f>] slab_alloc mm/slab.c:3320 [inline]
    [<00000000e670bd2f>] kmem_cache_alloc_trace+0x145/0x2c0 mm/slab.c:3549
    [<000000000f637ea3>] kmalloc include/linux/slab.h:556 [inline]
    [<000000000f637ea3>] genl_dumpit_info_alloc net/netlink/genetlink.c:463 [inline]
    [<000000000f637ea3>] genl_family_rcv_msg_dumpit net/netlink/genetlink.c:597 [inline]
    [<000000000f637ea3>] genl_family_rcv_msg net/netlink/genetlink.c:714 [inline]
    [<000000000f637ea3>] genl_rcv_msg+0x385/0x580 net/netlink/genetlink.c:734
    [<000000007aa7803c>] netlink_rcv_skb+0x61/0x170 net/netlink/af_netlink.c:2477
    [<00000000cf0291ee>] genl_rcv+0x29/0x40 net/netlink/genetlink.c:745
    [<00000000d9eda8cf>] netlink_unicast_kernel net/netlink/af_netlink.c:1302 [inline]
    [<00000000d9eda8cf>] netlink_unicast+0x223/0x310 net/netlink/af_netlink.c:1328
    [<00000000d87050ed>] netlink_sendmsg+0x2c0/0x570 net/netlink/af_netlink.c:1917
    [<0000000073d32856>] sock_sendmsg_nosec net/socket.c:639 [inline]
    [<0000000073d32856>] sock_sendmsg+0x54/0x70 net/socket.c:659
    [<00000000c88230c3>] ____sys_sendmsg+0x2d0/0x300 net/socket.c:2330
    [<00000000119fa4e9>] ___sys_sendmsg+0x8a/0xd0 net/socket.c:2384
    [<00000000196367bc>] __sys_sendmsg+0x80/0xf0 net/socket.c:2417
    [<0000000022242f1e>] __do_sys_sendmsg net/socket.c:2426 [inline]
    [<0000000022242f1e>] __se_sys_sendmsg net/socket.c:2424 [inline]
    [<0000000022242f1e>] __x64_sys_sendmsg+0x23/0x30 net/socket.c:2424
    [<000000007b63ee83>] do_syscall_64+0x73/0x220 arch/x86/entry/common.c:294
    [<00000000447890a9>] entry_SYSCALL_64_after_hwframe+0x44/0xa9

BUG: memory leak
unreferenced object 0xffff88811cc193c0 (size 32):
  comm "syz-executor.0", pid 7225, jiffies 4295042308 (age 7.220s)
  hex dump (first 32 bytes):
    c0 a7 16 84 ff ff ff ff 30 0c b2 83 ff ff ff ff  ........0.......
    00 30 fc 0e 81 88 ff ff 00 00 00 00 00 00 00 00  .0..............
  backtrace:
    [<00000000e670bd2f>] kmemleak_alloc_recursive include/linux/kmemleak.h:43 [inline]
    [<00000000e670bd2f>] slab_post_alloc_hook mm/slab.h:586 [inline]
    [<00000000e670bd2f>] slab_alloc mm/slab.c:3320 [inline]
    [<00000000e670bd2f>] kmem_cache_alloc_trace+0x145/0x2c0 mm/slab.c:3549
    [<000000000f637ea3>] kmalloc include/linux/slab.h:556 [inline]
    [<000000000f637ea3>] genl_dumpit_info_alloc net/netlink/genetlink.c:463 [inline]
    [<000000000f637ea3>] genl_family_rcv_msg_dumpit net/netlink/genetlink.c:597 [inline]
    [<000000000f637ea3>] genl_family_rcv_msg net/netlink/genetlink.c:714 [inline]
    [<000000000f637ea3>] genl_rcv_msg+0x385/0x580 net/netlink/genetlink.c:734
    [<000000007aa7803c>] netlink_rcv_skb+0x61/0x170 net/netlink/af_netlink.c:2477
    [<00000000cf0291ee>] genl_rcv+0x29/0x40 net/netlink/genetlink.c:745
    [<00000000d9eda8cf>] netlink_unicast_kernel net/netlink/af_netlink.c:1302 [inline]
    [<00000000d9eda8cf>] netlink_unicast+0x223/0x310 net/netlink/af_netlink.c:1328
    [<00000000d87050ed>] netlink_sendmsg+0x2c0/0x570 net/netlink/af_netlink.c:1917
    [<0000000073d32856>] sock_sendmsg_nosec net/socket.c:639 [inline]
    [<0000000073d32856>] sock_sendmsg+0x54/0x70 net/socket.c:659
    [<00000000c88230c3>] ____sys_sendmsg+0x2d0/0x300 net/socket.c:2330
    [<00000000119fa4e9>] ___sys_sendmsg+0x8a/0xd0 net/socket.c:2384
    [<00000000196367bc>] __sys_sendmsg+0x80/0xf0 net/socket.c:2417
    [<0000000022242f1e>] __do_sys_sendmsg net/socket.c:2426 [inline]
    [<0000000022242f1e>] __se_sys_sendmsg net/socket.c:2424 [inline]
    [<0000000022242f1e>] __x64_sys_sendmsg+0x23/0x30 net/socket.c:2424
    [<000000007b63ee83>] do_syscall_64+0x73/0x220 arch/x86/entry/common.c:294
    [<00000000447890a9>] entry_SYSCALL_64_after_hwframe+0x44/0xa9

BUG: memory leak
unreferenced object 0xffff88812a2966e0 (size 32):
  comm "syz-executor.0", pid 7229, jiffies 4295042309 (age 7.210s)
  hex dump (first 32 bytes):
    c0 a7 16 84 ff ff ff ff 30 0c b2 83 ff ff ff ff  ........0.......
    00 40 2d 22 81 88 ff ff 00 00 00 00 00 00 00 00  .@-"............
  backtrace:
    [<00000000e670bd2f>] kmemleak_alloc_recursive include/linux/kmemleak.h:43 [inline]
    [<00000000e670bd2f>] slab_post_alloc_hook mm/slab.h:586 [inline]
    [<00000000e670bd2f>] slab_alloc mm/slab.c:3320 [inline]
    [<00000000e670bd2f>] kmem_cache_alloc_trace+0x145/0x2c0 mm/slab.c:3549
    [<000000000f637ea3>] kmalloc include/linux/slab.h:556 [inline]
    [<000000000f637ea3>] genl_dumpit_info_alloc net/netlink/genetlink.c:463 [inline]
    [<000000000f637ea3>] genl_family_rcv_msg_dumpit net/netlink/genetlink.c:597 [inline]
    [<000000000f637ea3>] genl_family_rcv_msg net/netlink/genetlink.c:714 [inline]
    [<000000000f637ea3>] genl_rcv_msg+0x385/0x580 net/netlink/genetlink.c:734
    [<000000007aa7803c>] netlink_rcv_skb+0x61/0x170 net/netlink/af_netlink.c:2477
    [<00000000cf0291ee>] genl_rcv+0x29/0x40 net/netlink/genetlink.c:745
    [<00000000d9eda8cf>] netlink_unicast_kernel net/netlink/af_netlink.c:1302 [inline]
    [<00000000d9eda8cf>] netlink_unicast+0x223/0x310 net/netlink/af_netlink.c:1328
    [<00000000d87050ed>] netlink_sendmsg+0x2c0/0x570 net/netlink/af_netlink.c:1917
    [<0000000073d32856>] sock_sendmsg_nosec net/socket.c:639 [inline]
    [<0000000073d32856>] sock_sendmsg+0x54/0x70 net/socket.c:659
    [<00000000c88230c3>] ____sys_sendmsg+0x2d0/0x300 net/socket.c:2330
    [<00000000119fa4e9>] ___sys_sendmsg+0x8a/0xd0 net/socket.c:2384
    [<00000000196367bc>] __sys_sendmsg+0x80/0xf0 net/socket.c:2417
    [<0000000022242f1e>] __do_sys_sendmsg net/socket.c:2426 [inline]
    [<0000000022242f1e>] __se_sys_sendmsg net/socket.c:2424 [inline]
    [<0000000022242f1e>] __x64_sys_sendmsg+0x23/0x30 net/socket.c:2424
    [<000000007b63ee83>] do_syscall_64+0x73/0x220 arch/x86/entry/common.c:294
    [<00000000447890a9>] entry_SYSCALL_64_after_hwframe+0x44/0xa9
Crashes (2):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	VM info	Title
ci-upstream-gce-leak	2019/12/21 19:09	upstream	f1fd1610cbb6	bc586918	.config	log	report	syz
ci-upstream-gce-leak	2019/12/18 05:22	upstream	9065e0636036	a6bc9c88	.config	log	report	syz