Seems that compat_core_sys_select() is using kmalloc(0) and SLUB is
picking up on it. Occuring on an older x86_64 numa system.
BUG: at include/linux/slub_def.h:88 kmalloc_index()
Call Trace:
[<ffffffff80270392>] get_slab+0x50/0x1f7
[<ffffffff802706d0>] __kmalloc+0xf/0x6d
[<ffffffff802a0421>] compat_core_sys_select+0x7e/0x1d8
[<ffffffff802a061d>] compat_sys_select+0xa2/0x131
[<ffffffff8021acb2>] ia32_sysret+0x0/0xa
This appears to occur when a 32 bit app uses select(0, ...) as a
timeout. I think its safe as it is, in that we'll never touch the
pointers if n==0 but more eyes would help. It might be clearer to
special case the n==0 case to avoid all this.
-apw
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