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Tue, 29 Sep 2026 07:19:47 +0000 Message-ID: <11e76ef6-e59b-4c4a-91a8-276398b0d785@suse.de> Date: Tue, 29 Sep 2026 09:19:46 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v2] [gdb] Detect corrupt link map with zero l_ld and l_addr From: Tom de Vries To: Simon Marchi , gdb-patches@sourceware.org References: <20260927063055.1997027-1-tdevries@suse.de> <1fac98af-e3d1-47ba-a0b6-c97344bfe6c9@suse.de> Content-Language: en-US In-Reply-To: <1fac98af-e3d1-47ba-a0b6-c97344bfe6c9@suse.de> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit X-Rspamd-Action: no action X-Rspamd-Server: rspamd2.dmz-prg2.suse.org X-Rspamd-Queue-Id: AF4B921B82 X-Spamd-Result: default: False [-4.51 / 50.00]; BAYES_HAM(-3.00)[99.99%]; NEURAL_HAM_LONG(-1.00)[-1.000]; R_DKIM_ALLOW(-0.20)[suse.de:s=susede2_rsa,suse.de:s=susede2_ed25519]; NEURAL_HAM_SHORT(-0.20)[-0.999]; MIME_GOOD(-0.10)[text/plain]; MX_GOOD(-0.01)[]; URIBL_BLOCKED(0.00)[suse.de:dkim,suse.de:mid,imap1.dmz-prg2.suse.org:rdns,imap1.dmz-prg2.suse.org:helo]; TO_DN_SOME(0.00)[]; ARC_NA(0.00)[]; DKIM_SIGNED(0.00)[suse.de:s=susede2_rsa,suse.de:s=susede2_ed25519]; RCPT_COUNT_TWO(0.00)[2]; MIME_TRACE(0.00)[0:+]; RBL_SPAMHAUS_BLOCKED_OPENRESOLVER(0.00)[2a07:de40:b281:104:10:150:64:97:from]; FROM_HAS_DN(0.00)[]; SPAMHAUS_XBL(0.00)[2a07:de40:b281:104:10:150:64:97:from]; MID_RHS_MATCH_FROM(0.00)[]; RCVD_COUNT_TWO(0.00)[2]; FROM_EQ_ENVFROM(0.00)[]; TO_MATCH_ENVRCPT_ALL(0.00)[]; RECEIVED_SPAMHAUS_BLOCKED_OPENRESOLVER(0.00)[2a07:de40:b281:106:10:150:64:167:received]; DKIM_TRACE(0.00)[suse.de:+]; RCVD_VIA_SMTP_AUTH(0.00)[]; RCVD_TLS_ALL(0.00)[]; DBL_BLOCKED_OPENRESOLVER(0.00)[suse.de:dkim, suse.de:mid, imap1.dmz-prg2.suse.org:rdns, imap1.dmz-prg2.suse.org:helo] X-BeenThere: gdb-patches@sourceware.org X-Mailman-Version: 2.1.30 Precedence: list List-Id: Gdb-patches mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: gdb-patches-bounces~public-inbox=simark.ca@sourceware.org On 9/28/26 5:30 PM, Tom de Vries wrote: >> Returning 0 means we stop reading the shared library list, is that >> expected?  The known case of this isn't really that the shared library >> list is corrupted, just that this entry is incomplete.  We could maybe >> skip over this entry and keep reading the list, to be able to present >> all the loaded shared libraries to the user? >> > > Hi Simon, > > thanks for the review. > > I think you're right, using continue instead of return 0 is more > appropriate. > >> Is the warning printed every time the library list is read (like at each >> stop)?  Does that become annoying for the user? >> >> In the end maybe we don't care too much about these concerns, because >> it's for one specific version of one specific distro, and only when >> debugging programs that use multiple namespaces (which are quite rare I >> think). >> > > It could be annoying, agreed. > > I'm treating this though as a corruption that is triggered by one > specific version of one specific distro, but might happen otherwise. > > So I think there is information in how many times the warning triggers. > > We could keep track for which shared libs the warning triggers, and emit > a summary instead.  But I don't think it's worth the bother at this point. > I've tested the continue approach, and submitted a v3 ( https://sourceware.org/pipermail/gdb-patches/2026-September/230704.html ). Thanks, - Tom > Thanks, > - Tom