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: 705d, last: 27d

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	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
upstream	memory leak in new_inode_pseudo	C			136	710d	759d	13/22	fixed on 2019/07/10 21:40

Patch testing requests:
Created	Duration	User	Patch	Repo	Result
2021/04/08 15:25	16m	esmethedev@gmail.com		https://github.com/HayashiEsme/linux.git master	OK

Sample crash report:

Warning: Permanently added '10.128.1.56' (ECDSA) to the list of known hosts.
executing program
executing program
BUG: memory leak
unreferenced object 0xffff88810ffc12a0 (size 608):
  comm "kworker/u4:6", pid 8374, jiffies 4294943260 (age 13.000s)
  hex dump (first 32 bytes):
    80 11 04 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff  ................
  backtrace:
    [<ffffffff8157b7be>] alloc_inode+0xbe/0x100 fs/inode.c:236
    [<ffffffff8157d823>] new_inode_pseudo+0x13/0x70 fs/inode.c:928
    [<ffffffff81559afb>] get_pipe_inode fs/pipe.c:855 [inline]
    [<ffffffff81559afb>] create_pipe_files+0x2b/0x2e0 fs/pipe.c:895
    [<ffffffff8126c86d>] umd_setup+0xad/0x220 kernel/usermode_driver.c:115
    [<ffffffff812535d4>] call_usermodehelper_exec_async+0xb4/0x1b0 kernel/umh.c:101
    [<ffffffff8100227f>] ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294

BUG: memory leak
unreferenced object 0xffff88811209f318 (size 24):
  comm "kworker/u4:6", pid 8374, jiffies 4294943260 (age 13.000s)
  hex dump (first 24 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                          ........
  backtrace:
    [<ffffffff820e0aea>] kmem_cache_zalloc include/linux/slab.h:674 [inline]
    [<ffffffff820e0aea>] lsm_inode_alloc security/security.c:590 [inline]
    [<ffffffff820e0aea>] security_inode_alloc+0x2a/0xb0 security/security.c:973
    [<ffffffff815792e4>] inode_init_always+0x114/0x250 fs/inode.c:171
    [<ffffffff8157b744>] alloc_inode+0x44/0x100 fs/inode.c:241
    [<ffffffff8157d823>] new_inode_pseudo+0x13/0x70 fs/inode.c:928
    [<ffffffff81559afb>] get_pipe_inode fs/pipe.c:855 [inline]
    [<ffffffff81559afb>] create_pipe_files+0x2b/0x2e0 fs/pipe.c:895
    [<ffffffff8126c86d>] umd_setup+0xad/0x220 kernel/usermode_driver.c:115
    [<ffffffff812535d4>] call_usermodehelper_exec_async+0xb4/0x1b0 kernel/umh.c:101
    [<ffffffff8100227f>] ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294

BUG: memory leak
unreferenced object 0xffff88810e110a80 (size 192):
  comm "kworker/u4:6", pid 8374, jiffies 4294943260 (age 13.000s)
  hex dump (first 32 bytes):
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
    90 0a 11 0e 81 88 ff ff 90 0a 11 0e 81 88 ff ff  ................
  backtrace:
    [<ffffffff815590cf>] kmalloc include/linux/slab.h:554 [inline]
    [<ffffffff815590cf>] kzalloc include/linux/slab.h:684 [inline]
    [<ffffffff815590cf>] alloc_pipe_info+0x8f/0x320 fs/pipe.c:774
    [<ffffffff81559b1d>] get_pipe_inode fs/pipe.c:863 [inline]
    [<ffffffff81559b1d>] create_pipe_files+0x4d/0x2e0 fs/pipe.c:895
    [<ffffffff8126c86d>] umd_setup+0xad/0x220 kernel/usermode_driver.c:115
    [<ffffffff812535d4>] call_usermodehelper_exec_async+0xb4/0x1b0 kernel/umh.c:101
    [<ffffffff8100227f>] ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294

BUG: memory leak
unreferenced object 0xffff888110c51800 (size 1024):
  comm "kworker/u4:6", pid 8374, jiffies 4294943260 (age 13.000s)
  hex dump (first 32 bytes):
    c0 99 38 04 00 ea ff ff 28 00 00 00 00 00 00 00  ..8.....(.......
    00 00 00 00 00 00 00 00 10 00 00 00 00 00 00 00  ................
  backtrace:
    [<ffffffff81559194>] kcalloc include/linux/slab.h:623 [inline]
    [<ffffffff81559194>] alloc_pipe_info+0x154/0x320 fs/pipe.c:791
    [<ffffffff81559b1d>] get_pipe_inode fs/pipe.c:863 [inline]
    [<ffffffff81559b1d>] create_pipe_files+0x4d/0x2e0 fs/pipe.c:895
    [<ffffffff8126c86d>] umd_setup+0xad/0x220 kernel/usermode_driver.c:115
    [<ffffffff812535d4>] call_usermodehelper_exec_async+0xb4/0x1b0 kernel/umh.c:101
    [<ffffffff8100227f>] ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294

BUG: memory leak
unreferenced object 0xffff88810ffd5e40 (size 192):
  comm "kworker/u4:6", pid 8374, jiffies 4294943260 (age 13.000s)
  hex dump (first 32 bytes):
    00 00 50 40 02 00 00 00 00 00 00 00 00 00 00 00  ..P@............
    00 00 00 00 00 00 00 00 40 5e fd 0f 81 88 ff ff  ........@^......
  backtrace:
    [<ffffffff81572d4a>] __d_alloc+0x2a/0x270 fs/dcache.c:1742
    [<ffffffff815779e9>] d_alloc_pseudo+0x19/0x40 fs/dcache.c:1871
    [<ffffffff8154b4bf>] alloc_file_pseudo+0x5f/0x140 fs/file_table.c:225
    [<ffffffff81559c08>] create_pipe_files+0x138/0x2e0 fs/pipe.c:911
    [<ffffffff8126c86d>] umd_setup+0xad/0x220 kernel/usermode_driver.c:115
    [<ffffffff812535d4>] call_usermodehelper_exec_async+0xb4/0x1b0 kernel/umh.c:101
    [<ffffffff8100227f>] ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294

BUG: memory leak
unreferenced object 0xffff888110c17c00 (size 232):
  comm "kworker/u4:6", pid 8374, jiffies 4294943260 (age 13.000s)
  hex dump (first 32 bytes):
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
    e0 e7 04 01 81 88 ff ff 40 5e fd 0f 81 88 ff ff  ........@^......
  backtrace:
    [<ffffffff8154aabf>] kmem_cache_zalloc include/linux/slab.h:674 [inline]
    [<ffffffff8154aabf>] __alloc_file+0x1f/0xf0 fs/file_table.c:101
    [<ffffffff8154b1f9>] alloc_empty_file+0x69/0x120 fs/file_table.c:150
    [<ffffffff8154b2e3>] alloc_file+0x33/0x1b0 fs/file_table.c:192
    [<ffffffff8154b612>] alloc_file_clone+0x22/0x70 fs/file_table.c:244
    [<ffffffff81559c52>] create_pipe_files+0x182/0x2e0 fs/pipe.c:922
    [<ffffffff8126c86d>] umd_setup+0xad/0x220 kernel/usermode_driver.c:115
    [<ffffffff812535d4>] call_usermodehelper_exec_async+0xb4/0x1b0 kernel/umh.c:101
    [<ffffffff8100227f>] ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294

Crashes (153):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	Title
ci-upstream-gce-leak	2021/03/19 06:57	upstream	bf152b0b	380dcc3e	.config	log	report	syz	C	memory leak in new_inode_pseudo
ci-upstream-gce-leak	2021/02/18 04:56	upstream	f40ddce8	14052202	.config	log	report	syz	C	memory leak in new_inode_pseudo
ci-upstream-gce-leak	2021/02/17 11:21	upstream	f40ddce8	052f8d9f	.config	log	report	syz	C	memory leak in new_inode_pseudo
ci-upstream-gce-leak	2021/02/08 01:27	upstream	b75dba7f	2ce644fc	.config	log	report	syz	C	memory leak in new_inode_pseudo
ci-upstream-gce-leak	2021/02/04 01:03	upstream	3afe9076	624dad51	.config	log	report	syz	C	memory leak in new_inode_pseudo
ci-upstream-gce-leak	2019/10/30 23:47	upstream	320000e7	a41ca8fa	.config	log	report	syz	C
ci-upstream-gce-leak	2019/10/28 21:27	upstream	9e5eefba	439d7b14	.config	log	report	syz	C
ci-upstream-gce-leak	2019/10/28 01:03	upstream	d6d5df1d	25bb509e	.config	log	report	syz	C
ci-upstream-gce-leak	2019/10/28 00:33	upstream	d6d5df1d	25bb509e	.config	log	report	syz	C
ci-upstream-gce-leak	2019/10/28 00:11	upstream	d6d5df1d	25bb509e	.config	log	report	syz	C
ci-upstream-gce-leak	2019/10/27 22:24	upstream	d6d5df1d	25bb509e	.config	log	report	syz	C
ci-upstream-gce-leak	2019/10/25 09:37	upstream	39a38bcb	d01bb02a	.config	log	report	syz	C
ci-upstream-gce-leak	2019/10/23 17:48	upstream	13b86bc4	b602d64b	.config	log	report	syz	C
ci-upstream-gce-leak	2019/10/23 06:50	upstream	3b7c59a1	d0686497	.config	log	report	syz	C
ci-upstream-gce-leak	2019/10/22 10:31	upstream	7d194c21	c59a7cd8	.config	log	report	syz	C
ci-upstream-gce-leak	2019/10/21 16:33	upstream	7d194c21	b24d2b8a	.config	log	report	syz	C
ci-upstream-gce-leak	2019/10/21 15:49	upstream	7d194c21	b24d2b8a	.config	log	report	syz	C
ci-upstream-gce-leak	2019/10/20 19:22	upstream	4fe34d61	8c88c9c1	.config	log	report	syz	C
ci-upstream-gce-leak	2019/10/19 17:38	upstream	998d7551	8c88c9c1	.config	log	report	syz	C
ci-upstream-gce-leak	2019/10/18 11:11	upstream	283ea345	8c88c9c1	.config	log	report	syz	C
ci-upstream-gce-leak	2019/10/18 10:51	upstream	283ea345	8c88c9c1	.config	log	report	syz	C
ci-upstream-gce-leak	2019/10/18 05:22	upstream	283ea345	8c88c9c1	.config	log	report	syz	C
ci-upstream-gce-leak	2019/10/18 04:50	upstream	283ea345	8c88c9c1	.config	log	report	syz	C
ci-upstream-gce-leak	2019/10/16 17:26	upstream	3b1f00ac	d4ea592f	.config	log	report	syz	C
ci-upstream-gce-leak	2019/10/15 01:11	upstream	4f5cafb5	05ad7292	.config	log	report	syz	C
ci-upstream-gce-leak	2019/10/14 01:27	upstream	da940012	2f661ec4	.config	log	report	syz	C
ci-upstream-gce-leak	2019/10/13 12:51	upstream	da940012	2f661ec4	.config	log	report	syz	C
ci-upstream-gce-leak	2019/10/13 05:28	upstream	328fefad	426631dd	.config	log	report	syz	C
ci-upstream-gce-leak	2019/10/11 04:09	upstream	9e208aa0	1a3bad90	.config	log	report	syz	C
ci-upstream-gce-leak	2019/10/10 05:12	upstream	8a8c600d	c4b9981b	.config	log	report	syz	C
ci-upstream-gce-leak	2019/10/09 14:38	upstream	e3280b54	312c6a5a	.config	log	report	syz	C
ci-upstream-gce-leak	2019/10/06 14:40	upstream	43b815c6	f3f7d9c8	.config	log	report	syz	C
ci-upstream-gce-leak	2019/10/06 13:06	upstream	43b815c6	f3f7d9c8	.config	log	report	syz	C
ci-upstream-gce-leak	2019/10/05 16:05	upstream	4ea65534	f3f7d9c8	.config	log	report	syz	C
ci-upstream-gce-leak	2019/10/05 15:37	upstream	4ea65534	f3f7d9c8	.config	log	report	syz	C
ci-upstream-gce-leak	2019/10/05 01:13	upstream	b145b0eb	f3f7d9c8	.config	log	report	syz	C
ci-upstream-gce-leak	2019/10/04 14:32	upstream	cc3a7bfe	b2f369e5	.config	log	report	syz	C
ci-upstream-gce-leak	2019/10/04 04:08	upstream	cc3a7bfe	fc17ba49	.config	log	report	syz	C
ci-upstream-gce-leak	2019/10/04 03:40	upstream	cc3a7bfe	fc17ba49	.config	log	report	syz	C
ci-upstream-gce-leak	2019/10/03 07:55	upstream	65aa35c9	2e29b534	.config	log	report	syz	C
ci-upstream-gce-leak	2019/10/03 07:34	upstream	65aa35c9	2e29b534	.config	log	report	syz	C
ci-upstream-gce-leak	2019/07/16 08:27	upstream	be8454af	6732e2c0	.config	log	report	syz	C
ci-upstream-gce-leak	2021/05/23 05:40	upstream	23d72926	3c7fef33	.config	log	report	syz		memory leak in new_inode_pseudo
ci-upstream-gce-leak	2020/12/10 04:26	upstream	a68a0262	c090b4da	.config	log	report	syz
ci-upstream-gce-leak	2019/10/29 00:00	upstream	9e5eefba	439d7b14	.config	log	report	syz
ci-upstream-gce-leak	2019/10/25 17:51	upstream	39a38bcb	c2e837da	.config	log	report	syz
ci-upstream-gce-leak	2019/07/15 17:20	upstream	fec88ab0	139ac68a	.config	log	report	syz