mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-28 11:18:45 +07:00
02a9e08d73
'ath10k_htt_tx_free_cont_txbuf' and 'ath10k_htt_tx_free_cont_frag_desc' have NULL pointer checks to avoid crash if they are called twice but this is as of now not sufficient as these pointers are not assigned to NULL once the contiguous DMA memory allocation is freed, fix this. Though this may not be hit with the explicity check of state variable 'tx_mem_allocated' check, good to have this addressed as well. Below BUG_ON is hit when the above scenario is simulated with kernel debugging enabled page:f6d09a00 count:0 mapcount:-127 mapping: (null) index:0x0 flags: 0x40000000() page dumped because: VM_BUG_ON_PAGE(page_ref_count(page) == 0) ------------[ cut here ]------------ kernel BUG at ./include/linux/mm.h:445! invalid opcode: 0000 [#1] SMP DEBUG_PAGEALLOC EIP is at put_page_testzero.part.88+0xd/0xf Call Trace: [<c118a2cc>] __free_pages+0x3c/0x40 [<c118a30e>] free_pages+0x3e/0x50 [<c10222b4>] dma_generic_free_coherent+0x24/0x30 [<f8c1d9a8>] ath10k_htt_tx_free_cont_txbuf+0xf8/0x140 [<f8c1e2a9>] ath10k_htt_tx_destroy+0x29/0xa0 [<f8c143e0>] ath10k_core_destroy+0x60/0x80 [ath10k_core] [<f8acd7e9>] ath10k_pci_remove+0x79/0xa0 [ath10k_pci] [<c13ed7a8>] pci_device_remove+0x38/0xb0 [<c14d3492>] __device_release_driver+0x72/0x100 [<c14d36b7>] driver_detach+0x97/0xa0 [<c14d29c0>] bus_remove_driver+0x40/0x80 [<c14d427a>] driver_unregister+0x2a/0x60 [<c13ec768>] pci_unregister_driver+0x18/0x70 [<f8aced4f>] ath10k_pci_exit+0xd/0x2be [ath10k_pci] [<c1101e78>] SyS_delete_module+0x158/0x210 [<c11b34f1>] ? __might_fault+0x41/0xa0 [<c11b353b>] ? __might_fault+0x8b/0xa0 [<c1001a4b>] do_fast_syscall_32+0x9b/0x1c0 [<c178da34>] sysenter_past_esp+0x45/0x74 Signed-off-by: Mohammed Shafi Shajakhan <mohammed@qti.qualcomm.com> Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com> |
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| .. | ||
| appletalk | ||
| arcnet | ||
| bonding | ||
| caif | ||
| can | ||
| cris | ||
| dsa | ||
| ethernet | ||
| fddi | ||
| fjes | ||
| hamradio | ||
| hippi | ||
| hyperv | ||
| ieee802154 | ||
| ipvlan | ||
| irda | ||
| phy | ||
| plip | ||
| ppp | ||
| slip | ||
| team | ||
| usb | ||
| vmxnet3 | ||
| wan | ||
| wimax | ||
| wireless | ||
| xen-netback | ||
| dummy.c | ||
| eql.c | ||
| geneve.c | ||
| gtp.c | ||
| ifb.c | ||
| Kconfig | ||
| LICENSE.SRC | ||
| loopback.c | ||
| macsec.c | ||
| macvlan.c | ||
| macvtap.c | ||
| Makefile | ||
| mdio.c | ||
| mii.c | ||
| netconsole.c | ||
| nlmon.c | ||
| ntb_netdev.c | ||
| rionet.c | ||
| sb1000.c | ||
| Space.c | ||
| sungem_phy.c | ||
| tun.c | ||
| veth.c | ||
| virtio_net.c | ||
| vrf.c | ||
| vxlan.c | ||
| xen-netfront.c | ||