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authorGeorge Kennedy <george.kennedy@oracle.com>2022-11-28 21:18:25 +0100
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2023-01-20 13:06:10 +0100
commit1a726cb47fd204109c767409fa9ca15a96328f14 (patch)
treefb977d0771d52c0c8c386e668f4d72c033bff22e /drivers/misc/sgi-xp
parentfirmware: stratix10-svc: fix error handle while alloc/add device failed (diff)
downloadlinux-1a726cb47fd204109c767409fa9ca15a96328f14.tar.xz
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VMCI: check context->notify_page after call to get_user_pages_fast() to avoid GPF
The call to get_user_pages_fast() in vmci_host_setup_notify() can return NULL context->notify_page causing a GPF. To avoid GPF check if context->notify_page == NULL and return error if so. general protection fault, probably for non-canonical address 0xe0009d1000000060: 0000 [#1] PREEMPT SMP KASAN NOPTI KASAN: maybe wild-memory-access in range [0x0005088000000300- 0x0005088000000307] CPU: 2 PID: 26180 Comm: repro_34802241 Not tainted 6.1.0-rc4 #1 Hardware name: Red Hat KVM, BIOS 1.15.0-2.module+el8.6.0 04/01/2014 RIP: 0010:vmci_ctx_check_signal_notify+0x91/0xe0 Call Trace: <TASK> vmci_host_unlocked_ioctl+0x362/0x1f40 __x64_sys_ioctl+0x1a1/0x230 do_syscall_64+0x3a/0x90 entry_SYSCALL_64_after_hwframe+0x63/0xcd Fixes: a1d88436d53a ("VMCI: Fix two UVA mapping bugs") Reported-by: syzkaller <syzkaller@googlegroups.com> Signed-off-by: George Kennedy <george.kennedy@oracle.com> Reviewed-by: Vishnu Dasa <vdasa@vmware.com> Link: https://lore.kernel.org/r/1669666705-24012-1-git-send-email-george.kennedy@oracle.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/misc/sgi-xp')
0 files changed, 0 insertions, 0 deletions