Revision 757fed1d0898b893d7daa84183947c70f27632f3 authored by Wang Hai on 28 January 2021, 11:32:50 UTC, committed by Linus Torvalds on 28 January 2021, 17:05:44 UTC
This reverts commit dde3c6b72a16c2db826f54b2d49bdea26c3534a2. syzbot report a double-free bug. The following case can cause this bug. - mm/slab_common.c: create_cache(): if the __kmem_cache_create() fails, it does: out_free_cache: kmem_cache_free(kmem_cache, s); - but __kmem_cache_create() - at least for slub() - will have done sysfs_slab_add(s) -> sysfs_create_group() .. fails .. -> kobject_del(&s->kobj); .. which frees s ... We can't remove the kmem_cache_free() in create_cache(), because other error cases of __kmem_cache_create() do not free this. So, revert the commit dde3c6b72a16 ("mm/slub: fix a memory leak in sysfs_slab_add()") to fix this. Reported-by: syzbot+d0bd96b4696c1ef67991@syzkaller.appspotmail.com Fixes: dde3c6b72a16 ("mm/slub: fix a memory leak in sysfs_slab_add()") Acked-by: Vlastimil Babka <vbabka@suse.cz> Signed-off-by: Wang Hai <wanghai38@huawei.com> Cc: <stable@vger.kernel.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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File | Mode | Size |
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Kconfig | -rw-r--r-- | 287 bytes |
Makefile | -rw-r--r-- | 991 bytes |
af_llc.c | -rw-r--r-- | 31.4 KB |
llc_c_ac.c | -rw-r--r-- | 35.5 KB |
llc_c_ev.c | -rw-r--r-- | 21.3 KB |
llc_c_st.c | -rw-r--r-- | 151.9 KB |
llc_conn.c | -rw-r--r-- | 27.4 KB |
llc_core.c | -rw-r--r-- | 4.1 KB |
llc_if.c | -rw-r--r-- | 4.5 KB |
llc_input.c | -rw-r--r-- | 5.9 KB |
llc_output.c | -rw-r--r-- | 2.0 KB |
llc_pdu.c | -rw-r--r-- | 10.6 KB |
llc_proc.c | -rw-r--r-- | 6.0 KB |
llc_s_ac.c | -rw-r--r-- | 5.9 KB |
llc_s_ev.c | -rw-r--r-- | 3.5 KB |
llc_s_st.c | -rw-r--r-- | 5.7 KB |
llc_sap.c | -rw-r--r-- | 11.3 KB |
llc_station.c | -rw-r--r-- | 3.2 KB |
sysctl_net_llc.c | -rw-r--r-- | 1.8 KB |
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