Messages in this thread | | | Date | Thu, 23 Jun 2022 11:22:28 +0200 | From | Francois Romieu <> | Subject | Re: [PATCH] epic100: fix use after free on rmmod |
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Tong Zhang <ztong0001@gmail.com> : > epic_close() calls epic_rx() and uses dma buffer, but in epic_remove_one() > we already freed the dma buffer. To fix this issue, reorder function calls > like in the .probe function. > > BUG: KASAN: use-after-free in epic_rx+0xa6/0x7e0 [epic100] > Call Trace: > epic_rx+0xa6/0x7e0 [epic100] > epic_close+0xec/0x2f0 [epic100] > unregister_netdev+0x18/0x20 > epic_remove_one+0xaa/0xf0 [epic100] > > Fixes: ae150435b59e ("smsc: Move the SMC (SMSC) drivers") > Reported-by: Yilun Wu <yiluwu@cs.stonybrook.edu> > Signed-off-by: Tong Zhang <ztong0001@gmail.com>
The "Fixes:" tag is a bit misleading: this code path predates the move by several years. Ignoring pci_* vs dma_* API changes, this is pre-2005 material.
Reviewed-by: Francois Romieu <romieu@fr.zoreil.com>
-- Ueimor
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