splice-bind deadlock (was: [PATCH] af_unix: Revert 'lock_interruptible' in stream receive code)

Rainer Weikusat writes: > Hannes Frederic Sowa writes: > > [...] > >> There is still a deadlock lingering around > > [...] > >> http://lists.openwall.net/netdev/2015/11/10/4 [...] > (a while ago) A: socketpair() > > B: splice() from a pipe to /mnt/regular_file >

splice-bind deadlock (was: [PATCH] af_unix: Revert 'lock_interruptible' in stream receive code)

Rainer Weikusat writes: > Hannes Frederic Sowa writes: > > [...] > >> There is still a deadlock lingering around > > [...] > >> http://lists.openwall.net/netdev/2015/11/10/4 [...] > (a while ago) A: socketpair() >

Re: [PATCH] af_unix: Revert 'lock_interruptible' in stream receive code

Hannes Frederic Sowa writes: [...] > There is still a deadlock lingering around [...] > http://lists.openwall.net/netdev/2015/11/10/4 Interesting problem. Assuming the description (a while ago) A: socketpair() B: splice() from a pipe to /mnt/regular_file

Re: [PATCH] af_unix: Revert 'lock_interruptible' in stream receive code

From: Rainer Weikusat Date: Wed, 16 Dec 2015 20:09:25 + > With b3ca9b02b00704053a38bfe4c31dbbb9c13595d0, the AF_UNIX SOCK_STREAM > receive code was changed from using mutex_lock(>readlock) to > mutex_lock_interruptible(>readlock) to prevent signals from being > delayed for an indefinite time

Re: [PATCH] af_unix: Revert 'lock_interruptible' in stream receive code

On 17.12.2015 16:28, Rainer Weikusat wrote: > Hannes Frederic Sowa writes: >> On 16.12.2015 21:09, Rainer Weikusat wrote: >>> With b3ca9b02b00704053a38bfe4c31dbbb9c13595d0, the AF_UNIX SOCK_STREAM >>> receive code was changed from using mutex_lock(>readlock) to >>>

Re: [PATCH] af_unix: Revert 'lock_interruptible' in stream receive code

Hannes Frederic Sowa writes: > On 16.12.2015 21:09, Rainer Weikusat wrote: >> With b3ca9b02b00704053a38bfe4c31dbbb9c13595d0, the AF_UNIX SOCK_STREAM >> receive code was changed from using mutex_lock(>readlock) to >> mutex_lock_interruptible(>readlock) to prevent signals from being >> delayed for

Re: [PATCH] af_unix: Revert 'lock_interruptible' in stream receive code

On 16.12.2015 21:09, Rainer Weikusat wrote: > With b3ca9b02b00704053a38bfe4c31dbbb9c13595d0, the AF_UNIX SOCK_STREAM > receive code was changed from using mutex_lock(>readlock) to > mutex_lock_interruptible(>readlock) to prevent signals from being > delayed for an indefinite time if a thread

Re: [PATCH] af_unix: Revert 'lock_interruptible' in stream receive code

On 16.12.2015 21:09, Rainer Weikusat wrote: > With b3ca9b02b00704053a38bfe4c31dbbb9c13595d0, the AF_UNIX SOCK_STREAM > receive code was changed from using mutex_lock(>readlock) to > mutex_lock_interruptible(>readlock) to prevent signals from being > delayed for an indefinite time if a thread

Re: [PATCH] af_unix: Revert 'lock_interruptible' in stream receive code

Hannes Frederic Sowa writes: > On 16.12.2015 21:09, Rainer Weikusat wrote: >> With b3ca9b02b00704053a38bfe4c31dbbb9c13595d0, the AF_UNIX SOCK_STREAM >> receive code was changed from using mutex_lock(>readlock) to >> mutex_lock_interruptible(>readlock) to prevent

Re: [PATCH] af_unix: Revert 'lock_interruptible' in stream receive code

On 17.12.2015 16:28, Rainer Weikusat wrote: > Hannes Frederic Sowa writes: >> On 16.12.2015 21:09, Rainer Weikusat wrote: >>> With b3ca9b02b00704053a38bfe4c31dbbb9c13595d0, the AF_UNIX SOCK_STREAM >>> receive code was changed from using mutex_lock(>readlock) to >>>

Re: [PATCH] af_unix: Revert 'lock_interruptible' in stream receive code

From: Rainer Weikusat Date: Wed, 16 Dec 2015 20:09:25 + > With b3ca9b02b00704053a38bfe4c31dbbb9c13595d0, the AF_UNIX SOCK_STREAM > receive code was changed from using mutex_lock(>readlock) to > mutex_lock_interruptible(>readlock) to prevent signals from

Re: [PATCH] af_unix: Revert 'lock_interruptible' in stream receive code

Hannes Frederic Sowa writes: [...] > There is still a deadlock lingering around [...] > http://lists.openwall.net/netdev/2015/11/10/4 Interesting problem. Assuming the description (a while ago) A: socketpair() B: splice() from a pipe to

[PATCH] af_unix: Revert 'lock_interruptible' in stream receive code

With b3ca9b02b00704053a38bfe4c31dbbb9c13595d0, the AF_UNIX SOCK_STREAM receive code was changed from using mutex_lock(>readlock) to mutex_lock_interruptible(>readlock) to prevent signals from being delayed for an indefinite time if a thread sleeping on the mutex happened to be selected for

[PATCH] af_unix: Revert 'lock_interruptible' in stream receive code

With b3ca9b02b00704053a38bfe4c31dbbb9c13595d0, the AF_UNIX SOCK_STREAM receive code was changed from using mutex_lock(>readlock) to mutex_lock_interruptible(>readlock) to prevent signals from being delayed for an indefinite time if a thread sleeping on the mutex happened to be selected for