kernel panic: [German Accent]: OOM for a small slab growth!!! (2)

[akaros] kernel panic: [German Accent]: OOM for a small slab growth!!! (2)
Status: upstream: reported C repro on 2018/07/18 18:35
Reported-by: syzbot+b2f2e3eb4ea5b282c918@syzkaller.appspotmail.com
First: 94d, last: 4h17m

Sample crash report:

kernel panic at kern/src/slab.c:518, from core 0: [German Accent]: OOM for a small slab growth!!!
Stack Backtrace on Core 0:
#01 [<0xffffffffc200a2bc>] in backtrace at src/kdebug.c:220
#02 [<0xffffffffc2009afd>] in _panic at src/init.c:268
#03 [<0xffffffffc2053591>] in __kmem_alloc_from_slab at src/slab.c:518
#04 [<0xffffffffc2053bba>] in kmem_cache_alloc at src/slab.c:592
#05 [<0xffffffffc2002267>] in arena_alloc at src/arena.c:714
#06 [<     [inline]     >] in kmem_cache_grow at src/slab.c:706
#06 [<0xffffffffc2053394>] in __kmem_alloc_from_slab at src/slab.c:513
#07 [<0xffffffffc2053bba>] in kmem_cache_alloc at src/slab.c:592
#08 [<0xffffffffc200a742>] in kmalloc at src/kmalloc.c:74
#09 [<0xffffffffc205b65e>] in user_memdup.part.3 at src/umem.c:144
#10 [<     [inline]     >] in user_memdup at src/umem.c:144
#10 [<0xffffffffc205b8fd>] in user_strdup at src/umem.c:175
#11 [<0xffffffffc205b929>] in user_strdup_errno at src/umem.c:184
#12 [<0xffffffffc205bbda>] in copy_in_path at src/umem.c:252
#13 [<0xffffffffc205887a>] in sys_openat at src/syscall.c:1801
#14 [<0xffffffffc2059439>] in syscall at src/syscall.c:2528
#15 [<0xffffffffc2059604>] in run_local_syscall at src/syscall.c:2563
#16 [<0xffffffffc2059b39>] in prep_syscalls at src/syscall.c:2583
#17 [<0xffffffffc20ab38a>] in sysenter_callwrapper at arch/x86/trap.c:854

All crashes (224):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro
ci-akaros-main	2018/07/20 21:46	https://github.com/akaros/akaros.git master	9196d29a	8cc079c3	.config	log	report	syz	C
ci-akaros-main	2018/07/24 05:33	https://github.com/akaros/akaros.git master	c5f7000d	912c93d7	.config	log	report	syz	C
ci-akaros-main	2018/07/22 20:43	https://github.com/akaros/akaros.git master	9196d29a	8cc079c3	.config	log	report	syz	C
ci-akaros-main	2018/07/22 16:23	https://github.com/akaros/akaros.git master	9196d29a	8cc079c3	.config	log	report	syz	C
ci-akaros-main	2018/07/22 13:33	https://github.com/akaros/akaros.git master	9196d29a	8cc079c3	.config	log	report	syz	C
ci-akaros-main	2018/07/21 18:29	https://github.com/akaros/akaros.git master	9196d29a	8cc079c3	.config	log	report	syz	C
ci-akaros-main	2018/07/21 15:49	https://github.com/akaros/akaros.git master	9196d29a	8cc079c3	.config	log	report	syz	C
ci-akaros-main	2018/09/11 18:27	https://github.com/akaros/akaros.git master	09363dc1	4ae17b1f	.config	log	report	syz
ci-akaros-main	2018/09/10 07:02	https://github.com/akaros/akaros.git master	09363dc1	6b5120a4	.config	log	report	syz
ci-akaros-main	2018/09/02 23:39	https://github.com/akaros/akaros.git master	09363dc1	8d971420	.config	log	report	syz
ci-akaros-main	2018/08/12 20:10	https://github.com/akaros/akaros.git master	8b21413c	7a88b141	.config	log	report	syz
ci-akaros-main	2018/08/08 04:43	https://github.com/akaros/akaros.git master	8b21413c	1beb8136	.config	log	report	syz
ci-akaros-main	2018/08/05 08:32	https://github.com/akaros/akaros.git master	8b21413c	3476a2df	.config	log	report	syz
ci-akaros-main	2018/07/31 18:17	https://github.com/akaros/akaros.git master	6f34e34a	1a381291	.config	log	report	syz
ci-akaros-main	2018/07/18 18:34	https://github.com/akaros/akaros.git master	bf9a9ba0	49f35839	.config	log	report
ci-akaros-main	2018/10/21 01:20	https://github.com/akaros/akaros.git master	73001cbb	ecb386fe	.config	log	report
ci-akaros-main	2018/10/20 18:57	https://github.com/akaros/akaros.git master	73001cbb	ecb386fe	.config	log	report
ci-akaros-main	2018/10/20 10:40	https://github.com/akaros/akaros.git master	73001cbb	ecb386fe	.config	log	report
ci-akaros-main	2018/10/20 07:12	https://github.com/akaros/akaros.git master	73001cbb	ecb386fe	.config	log	report
ci-akaros-main	2018/10/20 05:52	https://github.com/akaros/akaros.git master	73001cbb	ecb386fe	.config	log	report
ci-akaros-main	2018/10/19 20:05	https://github.com/akaros/akaros.git master	73001cbb	ecb386fe	.config	log	report
ci-akaros-main	2018/10/19 01:26	https://github.com/akaros/akaros.git master	73001cbb	9aba67b5	.config	log	report
ci-akaros-main	2018/10/18 23:07	https://github.com/akaros/akaros.git master	73001cbb	9aba67b5	.config	log	report
ci-akaros-main	2018/10/18 19:16	https://github.com/akaros/akaros.git master	73001cbb	d257b2d2	.config	log	report
ci-akaros-main	2018/10/18 16:00	https://github.com/akaros/akaros.git master	73001cbb	d257b2d2	.config	log	report
ci-akaros-main	2018/10/18 14:18	https://github.com/akaros/akaros.git master	73001cbb	d257b2d2	.config	log	report
ci-akaros-main	2018/10/18 06:01	https://github.com/akaros/akaros.git master	73001cbb	b2695b95	.config	log	report
ci-akaros-main	2018/10/18 00:38	https://github.com/akaros/akaros.git master	73001cbb	b2695b95	.config	log	report
ci-akaros-main	2018/10/16 20:11	https://github.com/akaros/akaros.git master	73001cbb	1ba7fd7e	.config	log	report
ci-akaros-main	2018/10/16 17:55	https://github.com/akaros/akaros.git master	73001cbb	1ba7fd7e	.config	log	report
ci-akaros-main	2018/10/16 14:55	https://github.com/akaros/akaros.git master	73001cbb	1ba7fd7e	.config	log	report
ci-akaros-main	2018/10/16 01:56	https://github.com/akaros/akaros.git master	73001cbb	8cd30605	.config	log	report
ci-akaros-main	2018/10/15 16:45	https://github.com/akaros/akaros.git master	73001cbb	caf12900	.config	log	report
ci-akaros-main	2018/10/15 14:01	https://github.com/akaros/akaros.git master	73001cbb	caf12900	.config	log	report
ci-akaros-main	2018/10/15 11:27	https://github.com/akaros/akaros.git master	73001cbb	caf12900	.config	log	report
ci-akaros-main	2018/10/15 03:11	https://github.com/akaros/akaros.git master	73001cbb	caf12900	.config	log	report
ci-akaros-main	2018/10/15 02:46	https://github.com/akaros/akaros.git master	73001cbb	caf12900	.config	log	report
ci-akaros-main	2018/10/14 14:39	https://github.com/akaros/akaros.git master	73001cbb	caf12900	.config	log	report
ci-akaros-main	2018/10/13 23:32	https://github.com/akaros/akaros.git master	73001cbb	caf12900	.config	log	report
ci-akaros-main	2018/10/13 21:49	https://github.com/akaros/akaros.git master	73001cbb	caf12900	.config	log	report
ci-akaros-main	2018/10/13 19:18	https://github.com/akaros/akaros.git master	73001cbb	caf12900	.config	log	report
ci-akaros-main	2018/10/13 01:46	https://github.com/akaros/akaros.git master	73001cbb	caf12900	.config	log	report
ci-akaros-main	2018/10/12 12:50	https://github.com/akaros/akaros.git master	73001cbb	ba6ddb43	.config	log	report
ci-akaros-main	2018/10/12 01:27	https://github.com/akaros/akaros.git master	73001cbb	42c78641	.config	log	report
ci-akaros-main	2018/10/11 21:04	https://github.com/akaros/akaros.git master	cde6e108	42c78641	.config	log	report
ci-akaros-main	2018/10/11 16:56	https://github.com/akaros/akaros.git master	cde6e108	5f818b4b	.config	log	report
ci-akaros-main	2018/10/11 11:41	https://github.com/akaros/akaros.git master	cde6e108	5f818b4b	.config	log	report
ci-akaros-main	2018/10/11 08:35	https://github.com/akaros/akaros.git master	cde6e108	5f818b4b	.config	log	report
ci-akaros-main	2018/10/11 05:37	https://github.com/akaros/akaros.git master	cde6e108	5f818b4b	.config	log	report
ci-akaros-main	2018/10/11 03:45	https://github.com/akaros/akaros.git master	cde6e108	5f818b4b	.config	log	report
ci-akaros-main	2018/10/11 01:45	https://github.com/akaros/akaros.git master	cde6e108	5f818b4b	.config	log	report
ci-akaros-main	2018/10/10 23:45	https://github.com/akaros/akaros.git master	cde6e108	5f818b4b	.config	log	report
ci-akaros-main	2018/10/10 01:48	https://github.com/akaros/akaros.git master	fce2e832	8b311eaf	.config	log	report
ci-akaros-main	2018/10/09 21:44	https://github.com/akaros/akaros.git master	fce2e832	8b311eaf	.config	log	report
ci-akaros-main	2018/10/09 10:47	https://github.com/akaros/akaros.git master	fce2e832	8b311eaf	.config	log	report
ci-akaros-main	2018/10/08 20:43	https://github.com/akaros/akaros.git master	fce2e832	8b311eaf	.config	log	report
ci-akaros-main	2018/10/08 18:43	https://github.com/akaros/akaros.git master	fce2e832	8b311eaf	.config	log	report
ci-akaros-main	2018/10/08 00:50	https://github.com/akaros/akaros.git master	fce2e832	8b311eaf	.config	log	report