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authorMike Snitzer <snitzer@redhat.com>2017-01-25 16:24:52 +0100
committerMike Snitzer <snitzer@redhat.com>2017-02-03 10:18:43 -0500
commit4087a1fffe38106e10646606a27f10d40451862d (patch)
treebba4836d57a0ff1922c1831c62ba22b6bfd43794 /net/sched/sch_tbf.c
parentd19a55ccad15a486ffe03030570744e5d5bd9f8e (diff)
dm rq: cope with DM device destruction while in dm_old_request_fn()
Fixes a crash in dm_table_find_target() due to a NULL struct dm_table being passed from dm_old_request_fn() that races with DM device destruction. Reported-by: artem@flashgrid.io Signed-off-by: Mike Snitzer <snitzer@redhat.com> Cc: stable@vger.kernel.org
Diffstat (limited to 'net/sched/sch_tbf.c')
0 files changed, 0 insertions, 0 deletions
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Merge branch 'sparc64-non-resumable-user-error-recovery'
Liam R. Howlett says: ==================== sparc64: Recover from userspace non-resumable PIO & MEM errors A non-resumable error from userspace is able to cause a kernel panic or trap loop due to the setup and handling of the queued traps once in the kernel. This patch series addresses both of these issues. The queues are fixed by simply zeroing the memory before use. PIO errors from userspace will result in a SIGBUS being sent to the user process. The MEM errors form userspace will result in a SIGKILL and also cause the offending pages to be claimed so they are no longer used in future tasks. SIGKILL is used to ensure that the process does not try to coredump and result in an attempt to read the memory again from within kernel space. Although there is a HV call to scrub the memory (mem_scrub), there is no easy way to guarantee that the real memory address(es) are not used by other tasks. Clearing the error with mem_scrub would zero the memory and cause the other processes to proceed with bad data. The handling of other non-resumable errors remain unchanged and will cause a panic. ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/tcp_minisocks.c')