memory leak in new_inode

memory leak in new_inode_pseudo (2)
Status: upstream: reported C repro on 2019/07/16 07:38
Reported-by: syzbot+e682cca30bc101a4d9d9@syzkaller.appspotmail.com
First crash: 462d, last: 355d

Cause bisection: introduced by (bisect log):

commit a21f2a3ec62abe2e06500d6550659a0ff5624fbb
Author: Michael Callahan <michaelcallahan@fb.com>
Date: Tue May 3 15:12:49 2016 +0000

block: Minor blk_account_io_start usage cleanup

Crash: memory leak in next_bio (log)
Repro: C syz .config

similar bugs (1):
Kernel	Title	Repro	Bisected	Count	Last	Reported	Patched	Status
upstream	memory leak in new_inode_pseudo	C		136	468d	516d	13/17	fixed on 2019/07/10 21:40

Sample crash report:

executing program
BUG: memory leak
unreferenced object 0xffff88812b7e2940 (size 768):
  comm "syz-executor741", pid 7035, jiffies 4294942397 (age 12.970s)
  hex dump (first 32 bytes):
    03 00 00 00 01 00 ff ff 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:
    [<00000000f1bc4f68>] kmemleak_alloc_recursive include/linux/kmemleak.h:43 [inline]
    [<00000000f1bc4f68>] slab_post_alloc_hook mm/slab.h:586 [inline]
    [<00000000f1bc4f68>] slab_alloc mm/slab.c:3319 [inline]
    [<00000000f1bc4f68>] kmem_cache_alloc+0x13f/0x2c0 mm/slab.c:3483
    [<00000000e463d8aa>] sock_alloc_inode+0x1c/0xa0 net/socket.c:239
    [<000000009cded2cf>] alloc_inode+0x2c/0xe0 fs/inode.c:230
    [<0000000042318de9>] new_inode_pseudo+0x18/0x70 fs/inode.c:919
    [<0000000042d9dfac>] sock_alloc+0x1c/0x90 net/socket.c:558
    [<0000000029db6c72>] __sock_create+0x8f/0x250 net/socket.c:1382
    [<000000004bd898f0>] sock_create_kern+0x3b/0x50 net/socket.c:1487
    [<000000005d6ab776>] smc_create+0xae/0x160 net/smc/af_smc.c:1980
    [<000000000112fa9a>] __sock_create+0x164/0x250 net/socket.c:1418
    [<000000000a74642f>] sock_create net/socket.c:1469 [inline]
    [<000000000a74642f>] __sys_socket+0x69/0x110 net/socket.c:1511
    [<0000000007d7ea9b>] __do_sys_socket net/socket.c:1520 [inline]
    [<0000000007d7ea9b>] __se_sys_socket net/socket.c:1518 [inline]
    [<0000000007d7ea9b>] __x64_sys_socket+0x1e/0x30 net/socket.c:1518
    [<00000000cd7ac863>] do_syscall_64+0x73/0x1f0 arch/x86/entry/common.c:290
    [<000000003dd4baee>] entry_SYSCALL_64_after_hwframe+0x44/0xa9

BUG: memory leak
unreferenced object 0xffff888120bb8dc8 (size 56):
  comm "syz-executor741", pid 7035, jiffies 4294942397 (age 12.970s)
  hex dump (first 32 bytes):
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
    c0 29 7e 2b 81 88 ff ff e0 8d bb 20 81 88 ff ff  .)~+....... ....
  backtrace:
    [<00000000f1bc4f68>] kmemleak_alloc_recursive include/linux/kmemleak.h:43 [inline]
    [<00000000f1bc4f68>] slab_post_alloc_hook mm/slab.h:586 [inline]
    [<00000000f1bc4f68>] slab_alloc mm/slab.c:3319 [inline]
    [<00000000f1bc4f68>] kmem_cache_alloc+0x13f/0x2c0 mm/slab.c:3483
    [<00000000a454cc6f>] kmem_cache_zalloc include/linux/slab.h:680 [inline]
    [<00000000a454cc6f>] lsm_inode_alloc security/security.c:556 [inline]
    [<00000000a454cc6f>] security_inode_alloc+0x33/0xb0 security/security.c:915
    [<00000000eeb5f542>] inode_init_always+0x108/0x200 fs/inode.c:169
    [<000000007cd6d5af>] alloc_inode+0x49/0xe0 fs/inode.c:237
    [<0000000042318de9>] new_inode_pseudo+0x18/0x70 fs/inode.c:919
    [<0000000042d9dfac>] sock_alloc+0x1c/0x90 net/socket.c:558
    [<0000000029db6c72>] __sock_create+0x8f/0x250 net/socket.c:1382
    [<000000004bd898f0>] sock_create_kern+0x3b/0x50 net/socket.c:1487
    [<000000005d6ab776>] smc_create+0xae/0x160 net/smc/af_smc.c:1980
    [<000000000112fa9a>] __sock_create+0x164/0x250 net/socket.c:1418
    [<000000000a74642f>] sock_create net/socket.c:1469 [inline]
    [<000000000a74642f>] __sys_socket+0x69/0x110 net/socket.c:1511
    [<0000000007d7ea9b>] __do_sys_socket net/socket.c:1520 [inline]
    [<0000000007d7ea9b>] __se_sys_socket net/socket.c:1518 [inline]
    [<0000000007d7ea9b>] __x64_sys_socket+0x1e/0x30 net/socket.c:1518
    [<00000000cd7ac863>] do_syscall_64+0x73/0x1f0 arch/x86/entry/common.c:290
    [<000000003dd4baee>] entry_SYSCALL_64_after_hwframe+0x44/0xa9

Crashes (146):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	Maintainers
ci-upstream-gce-leak	2019/10/30 23:47	upstream	320000e7	a41ca8fa	.config	log	report	syz	C	davem@davemloft.net, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2019/10/28 21:27	upstream	9e5eefba	439d7b14	.config	log	report	syz	C	davem@davemloft.net, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2019/10/28 01:03	upstream	d6d5df1d	25bb509e	.config	log	report	syz	C	davem@davemloft.net, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2019/10/28 00:33	upstream	d6d5df1d	25bb509e	.config	log	report	syz	C	davem@davemloft.net, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2019/10/28 00:11	upstream	d6d5df1d	25bb509e	.config	log	report	syz	C	davem@davemloft.net, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2019/10/27 22:24	upstream	d6d5df1d	25bb509e	.config	log	report	syz	C	davem@davemloft.net, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2019/10/25 09:37	upstream	39a38bcb	d01bb02a	.config	log	report	syz	C	davem@davemloft.net, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2019/10/23 17:48	upstream	13b86bc4	b602d64b	.config	log	report	syz	C	davem@davemloft.net, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2019/10/23 06:50	upstream	3b7c59a1	d0686497	.config	log	report	syz	C	davem@davemloft.net, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2019/10/22 10:31	upstream	7d194c21	c59a7cd8	.config	log	report	syz	C	davem@davemloft.net, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2019/10/21 16:33	upstream	7d194c21	b24d2b8a	.config	log	report	syz	C	davem@davemloft.net, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2019/10/21 15:49	upstream	7d194c21	b24d2b8a	.config	log	report	syz	C	davem@davemloft.net, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2019/10/20 19:22	upstream	4fe34d61	8c88c9c1	.config	log	report	syz	C	davem@davemloft.net, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2019/10/19 17:38	upstream	998d7551	8c88c9c1	.config	log	report	syz	C	davem@davemloft.net, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2019/10/18 11:11	upstream	283ea345	8c88c9c1	.config	log	report	syz	C	davem@davemloft.net, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2019/10/18 10:51	upstream	283ea345	8c88c9c1	.config	log	report	syz	C	davem@davemloft.net, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2019/10/18 05:22	upstream	283ea345	8c88c9c1	.config	log	report	syz	C	davem@davemloft.net, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2019/10/18 04:50	upstream	283ea345	8c88c9c1	.config	log	report	syz	C	davem@davemloft.net, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2019/10/16 17:26	upstream	3b1f00ac	d4ea592f	.config	log	report	syz	C	davem@davemloft.net, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2019/10/15 01:11	upstream	4f5cafb5	05ad7292	.config	log	report	syz	C	davem@davemloft.net, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2019/10/14 01:27	upstream	da940012	2f661ec4	.config	log	report	syz	C	davem@davemloft.net, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2019/10/13 12:51	upstream	da940012	2f661ec4	.config	log	report	syz	C	davem@davemloft.net, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2019/10/13 05:28	upstream	328fefad	426631dd	.config	log	report	syz	C	davem@davemloft.net, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2019/10/11 04:09	upstream	9e208aa0	1a3bad90	.config	log	report	syz	C	davem@davemloft.net, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2019/10/10 05:12	upstream	8a8c600d	c4b9981b	.config	log	report	syz	C	davem@davemloft.net, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2019/10/09 14:38	upstream	e3280b54	312c6a5a	.config	log	report	syz	C	davem@davemloft.net, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2019/10/06 14:40	upstream	43b815c6	f3f7d9c8	.config	log	report	syz	C	davem@davemloft.net, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2019/10/06 13:06	upstream	43b815c6	f3f7d9c8	.config	log	report	syz	C	davem@davemloft.net, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2019/10/05 16:05	upstream	4ea65534	f3f7d9c8	.config	log	report	syz	C	davem@davemloft.net, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2019/10/05 15:37	upstream	4ea65534	f3f7d9c8	.config	log	report	syz	C	davem@davemloft.net, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2019/10/05 01:13	upstream	b145b0eb	f3f7d9c8	.config	log	report	syz	C	davem@davemloft.net, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2019/10/04 14:32	upstream	cc3a7bfe	b2f369e5	.config	log	report	syz	C	davem@davemloft.net, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2019/10/04 04:08	upstream	cc3a7bfe	fc17ba49	.config	log	report	syz	C	davem@davemloft.net, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2019/10/04 03:40	upstream	cc3a7bfe	fc17ba49	.config	log	report	syz	C	davem@davemloft.net, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2019/10/03 07:55	upstream	65aa35c9	2e29b534	.config	log	report	syz	C	davem@davemloft.net, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2019/10/03 07:34	upstream	65aa35c9	2e29b534	.config	log	report	syz	C	davem@davemloft.net, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2019/10/01 13:26	upstream	54ecb8f7	c7a4fb99	.config	log	report	syz	C	davem@davemloft.net, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2019/10/01 10:30	upstream	54ecb8f7	c7a4fb99	.config	log	report	syz	C	davem@davemloft.net, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2019/09/30 18:37	upstream	97f9a3c4	c7a4fb99	.config	log	report	syz	C	davem@davemloft.net, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2019/09/30 15:33	upstream	97f9a3c4	c7a4fb99	.config	log	report	syz	C	davem@davemloft.net, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2019/09/28 22:02	upstream	f1f2f614	eb6b9855	.config	log	report	syz	C	davem@davemloft.net, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2019/09/28 15:48	upstream	f1f2f614	eb6b9855	.config	log	report	syz	C	davem@davemloft.net, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2019/09/28 15:08	upstream	f1f2f614	eb6b9855	.config	log	report	syz	C	davem@davemloft.net, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2019/09/28 07:00	upstream	8f744bde	d8074e0b	.config	log	report	syz	C	davem@davemloft.net, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2019/07/16 08:27	upstream	be8454af	6732e2c0	.config	log	report	syz	C	davem@davemloft.net, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2019/10/29 00:00	upstream	9e5eefba	439d7b14	.config	log	report	syz		davem@davemloft.net, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2019/10/25 17:51	upstream	39a38bcb	c2e837da	.config	log	report	syz		davem@davemloft.net, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2019/07/15 17:20	upstream	fec88ab0	139ac68a	.config	log	report	syz		davem@davemloft.net, linux-kernel@vger.kernel.org, netdev@vger.kernel.org