srikanth007m
srikanth007m
/ double free in release_user_cpus_ptr
Created
October 27, 2022 11:01
32bit tasks which is being freed p->user_cpus_ptr which has been freed.
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| Dmesg log Call stack: object(user_mask) has been freed which in slab’s page->freelist. Sourcecode: user_mask has been freed.And user_mask is got from p->user_cpus_ptr | |
| [71053.256528][ T535] ------------[ cut here ]------------ | |
| [71053.256537][ T535] kernel BUG at mm/slub.c:363! | |
| [71053.261534][ T535] Internal error: Oops - BUG: 0 [#1] PREEMPT SMP | |
| [71053.268068][ T535] Skip md ftrace buffer dump for: 0xa00f50 | |
| [71053.834135][ T535] CPU: 5 PID: 535 Comm: default_npth_th Tainted: G S W OE 5.15.41 #1 | |
| [71053.843167][ T535] Hardware name: Qualcomm Technologies, Inc. 8550 socrates (DT) | |
| [71053.850855][ T535] pstate: 62400005 (nZCv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--) |
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| python3 memleak.py | |
| /virtual/main.c:217:1: warning: declaration of 'struct tracepoint__kmem__kmalloc' will not be visible outside of this function [-Wvisibility] | |
| TRACEPOINT_PROBE(kmem, kmalloc) { | |
| ^ | |
| /virtual/include/bcc/helpers.h:874:46: note: expanded from macro 'TRACEPOINT_PROBE' | |
| int tracepoint__##category##__##event(struct tracepoint__##category##__##event *args) | |
| ^ | |
| <scratch space>:63:1: note: expanded from here | |
| tracepoint__kmem__kmalloc | |
| ^ |
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