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In the following (rare) case down node will be always registered in epmd:
- client connects to epmd and sends ALIVE2 request
- epmd reads this request and starts to process it
- during that time client socket closes in such way that subsequent
write(2) in epmd will result in error
- at this point we have node that was registered in database, but as
the connection struct has no 'keep' flag set, the do_read() closes
connection and removes it from select fdset - and so there is no way
for this node to be cleaned up later.
We've seen several epmd instances in such state on our production
systems. And while I'm not sure what was the exact sequence of events
that leads to failed write(2), issue could be easily reproduced using
SO_LINGER option for socket.
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This happens only during processing ALIVE2 request. reply() already
performs the same delay as in the deleted code.
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* sverk/setnode-rename-bug/OTP-13076:
erts: Fix correct node name for DTRACE
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broken by 949de78331b9c4ecb9.
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* sverk/dist-ctrl-msg-overflow:
erts: Fix faulty cleanup when receiving broken dist msg
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Bug introduced in ce8279d6a48d41f9.
Thank you valgrind.
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OTP-13146 (more stuff)
* sverk/dist-ctrl-msg-overflow:
erts: Tweak hashmap heap size estimation
erts: Fix bug for remote control message containing fat maps
erts: Add test for remote exit signal with fat map
erts: Fix bug in heap_factory_undo for FACTORY_HEAP_FRAGS mode
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Fixed a mistake in commit 23885a.
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1. Change order between mul and div to not lose too much
in integer divisions.
2. Fix estimation in DEBUG to really be an *under* estimation.
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that could cause the static factory to overflow
Fix: Introduce a new factory mode FACTORY_TMP
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Conflicts:
OTP_VERSION
erts/doc/src/notes.xml
erts/vsn.mk
otp_versions.table
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The Types section is more consistent with Kostis' text in The
Reference Manual.
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Conflicts:
OTP_VERSION
erts/doc/src/notes.xml
erts/vsn.mk
lib/kernel/doc/src/notes.xml
lib/kernel/src/kernel.appup.src
lib/kernel/vsn.mk
lib/ssl/doc/src/notes.xml
lib/ssl/src/ssl.appup.src
lib/ssl/src/ssl_cipher.erl
lib/ssl/vsn.mk
otp_versions.table
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ERTS_PRINT_INVALID prevented file descriptor 0 to be used which
could cause an empty crash dump.
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* mikpe/hipe_x86_signal-musl-support:
hipe_x86_signal: add support for musl libc
OTP-13159
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Make sure a heap fragment is not deallocated before all off_heap
terms have been cleared.
The fix assumes/asserts that the off_heap-lists of all additional
heap fragments are empty.
I think this bug has been harmless as hashmap nodes, which is only
ones (?) that can cause a factory to produce more heap,
are not linked in off_heap-list.
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Also, some of the branches were testing sizes in bits against a constant
?MAX_BINSIZE, which was in bytes. The signed comparisons masked this
mistake. These branches have been removed since all sizes in bits that
fit in a machine word are valid binary sizes.
Finally, a test that reproduces the issue was added to bs_construct,
along with a test for one of the cases (bs_init<0>(...)) when the test
against ?MAX_BINSIZE must be changed to unsigned rather than removed.
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The test whether the result would fit in a smallnum could overflow into
a negative number that would fit a smallnum. A test that reproduces the
issue was added to bs_construct_SUITE.
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* sverk/rare-gc-map-overflow/OTP-13146:
erts: Fix rare case of faulty heap fragment deallocation
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* rickard/erts-print/OTP-13150:
Remove ERTS_PRINT_INVALID from erts_print()
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ERTS_PRINT_INVALID prevented file descriptor 0 to be used which
could cause an empty crash dump.
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huge_binary/1 did not consider that the Shift variable is not a
constant, and misses the case of a literal size.
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This feature was previously missing and expressions such as
<<<<1:1>>/binary>> would succeed construction when compiled with HiPE.
A primop is_divisible is introduced to handle the case when the unit
size is not a power of two.
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after major GC.
Can only be caused by distributed messages containing large maps.
Bad map hashing will increase the risk.
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OTP-13147
* sverk/cpool_fetch-dc_list-fix:
erts: Reduce alloc_SUITE:rbtree runtime for valgrind
erts: Remove double free in efile_drv
erts: Improve alloc_SUITE:migration test
erts: Pass free mem and build type to alloc_SUITE tests
erts: Fix snprintf in alloc_SUITE for windows
erts: Workaround for strange crash on win64 in alloc_SUITE test code
erts: Refactor alloc_SUITE to use NIFs instead of drivers
erts: Add enif_getenv
erts: Make key argument constant for erl_drv_{get|put}env
erts: Add alloc_SUITE:migration
erts: Add TEST allocator
erts: Fix confusion of callbacks destroying_mbc() vs remove_mbc()
erts: Fix resurrection of carriers from dc_list
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* sverk/setnode-rename-bug/OTP-13076:
erts: Fix bug in setnode/2
erts: Remove ERTS_PSD_DIST_ENTRY
erts: Remove faulty ASSERT in erts_proc_*_refc
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That double free is probably very seldom invoked as the port is already
gone leading to free_data being called instead of file_async_ready.
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In the quest to improve code coverage in cpool_fetch
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For some reason setjmp() crash when having jmp_buf heap allocated
but works when stack allocated.
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to read OS environment variables in a safe and portable way.
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* dgud/erts/fix-mixed-msys-cygwin:
win32: Fix mixed cygwin and msys configure tests
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* egil/18/fix-maps-binary_to_term/OTP-13125:
erts: More testcases for map binary_to_term/1
erts: Fix maps decode in erlang:binary_to_term/1
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Decoding a term with a large (HAMT) map in an small (FLAT) map could cause
a critical error if the external format was not produced by beam.
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* lrascao/fix/vm_crash_on_init_restart:
Fix crash on init restart
OTP-13115
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* bjorn/erts/erl_prim_loader-doc/OTP-13102:
erl_prim_loader doc: Remove description of custom loaders
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* legoscia/heart-remove-obsolete-comment:
Remove obsolete comment in heart.c
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* evnu/fix-whitespace-splitting:
Fix erroneous splitting of emulator path
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