Error Id 48237
Callaghan Email Updates: Status: Closed Impact on me: None Category:MySQL Server: InnoDB Plugin storage engine Severity:S3 (Non-critical) Version:5.0,5.1,5.1 plugin OS:Linux Assigned to: Satya B Tags: error, innodb, os_mem_alloc_large Triage: Triaged: D2 (Serious) View Add Comment Files Developer Edit Submission View Progress Log Contributions [22 Oct 2009 16:41] Mark Callaghan Description: Error handling in os_mem_alloc_large for failures from shmat() appears to be wrong as code that follows doesn't check for 'ptr == (void*) -1'. When it fails and 'ptr == (void*) -1', then: * shmctl will still be called * the 'if (ptr)' block will be entered Code from os_mem_alloc_large in os/os0proc.c shmid = shmget(IPC_PRIVATE, (size_t)size, SHM_HUGETLB | SHM_R | SHM_W); if (shmid < 0) { fprintf(stderr, "InnoDB: HugeTLB: Warning: Failed to allocate" " %lu bytes. errno %d\n", size, errno); ptr = NULL; } else { ptr = shmat(shmid, NULL, 0); if (ptr == (void *)-1) { fprintf(stderr, "InnoDB: HugeTLB: Warning: Failed to" " attach shared memory segment, errno %d\n", errno); } /* Remove the shared memory segment so that it will be automatically freed after memory is detached or process exits */ shmctl(shmid, IPC_RMID, &buf); } if (ptr) { *n = size; os_fast_mutex_lock(&ut_list_mutex); ut_total_allocated_memory += size; os_fast_mutex_unlock(&ut_list_mutex); # ifdef UNIV_SET_MEM_TO_ZERO memset(ptr, '\0', size); # endif UNIV_MEM_ALLOC(ptr, size); return(ptr); } How to repeat: review the code Suggested fix: check for 'ptr == (void*) -1' [22 Oct 2009 17:39] Harrison Fisk This is primarily a problem with the InnoDB plugin since more work is done in the if (ptr) block, however it does affect earlier version of InnoDB as well. Note that currently, this is only called if you use the --large-pages start-up option. It is a relatively trivial, unrisky fix to do imo. [23 Oct 2009 11:10] Mikhail Izioumtchenko Jimmy, could you have a look. Mark, we still need to call shmctl() to remove the shared memory segment if shmat() fails. My proposed fiz therefore is to add ptr = NULL; after that shmctl to avoid entering if (ptr) block [27 Oct 2009 3:53] Jimmy Yang Agreed. In case of shm
Callaghan Email Updates: Status: Closed Impact on me: None Category:MySQL Server: InnoDB Plugin storage engine Severity:S3 (Non-critical) Version:5.0,5.1,5.1 plugin OS:Linux Assigned to: Satya B Tags: error, innodb, os_mem_alloc_large Triage: Triaged: D2 (Serious) View Add Comment Files Developer Edit Submission View Progress Log Contributions [22 Oct 2009 16:41] Mark Callaghan Description: Error handling in os_mem_alloc_large for failures from shmat() appears to be wrong as code that follows doesn't check for 'ptr == (void*) -1'. When it fails and 'ptr == (void*) -1', then: * shmctl will still be https://bugs.mysql.com/bug.php?id=48237&files=1 called * the 'if (ptr)' block will be entered Code from os_mem_alloc_large in os/os0proc.c shmid = shmget(IPC_PRIVATE, (size_t)size, SHM_HUGETLB | SHM_R | SHM_W); if (shmid < 0) { fprintf(stderr, "InnoDB: HugeTLB: Warning: Failed to allocate" " %lu bytes. errno %d\n", size, errno); ptr = NULL; } else { ptr = shmat(shmid, NULL, 0); if (ptr == (void *)-1) { fprintf(stderr, "InnoDB: HugeTLB: https://bugs.mysql.com/bug.php?id=48237&contribs=1 Warning: Failed to" " attach shared memory segment, errno %d\n", errno); } /* Remove the shared memory segment so that it will be automatically freed after memory is detached or process exits */ shmctl(shmid, IPC_RMID, &buf); } if (ptr) { *n = size; os_fast_mutex_lock(&ut_list_mutex); ut_total_allocated_memory += size; os_fast_mutex_unlock(&ut_list_mutex); # ifdef UNIV_SET_MEM_TO_ZERO memset(ptr, '\0', size); # endif UNIV_MEM_ALLOC(ptr, size); return(ptr); } How to repeat: review the code Suggested fix: check for 'ptr == (void*) -1' [22 Oct 2009 17:39] Harrison Fisk This is primarily a problem with the InnoDB plugin since more work is done in the if (ptr) block, however it does affect earlier version of InnoDB as well. Note that currently, this is only called if you use the --large-pages start-up option. It is a relatively trivial, unrisky fix to do imo. [23 Oct 2009 11:10] Mikhail Izioumtchenko Jimmy, could you have a look. Mark, we still need to call shmctl() to remove the shared memory segment if shmat() fails. My proposed fiz therefore is to add ptr = NULL; after that shmctl to avoid entering if (ptr) block [27 Oct 2
searchesMessagesNotification Back to home page |Listed in category: eBay Motors > Parts & Accessories > Boat Parts > Outboard Engines & Components > Other Picture Information Image http://www.ebay.com/itm/Force-48237-BUSHING-NYLON-SHIFT-LEVER-3-8-I-D-/162042972357 not available Photos not available for this variation Mouse over to https://www.walgreens.com/locator/walgreens-13550+w+9+mile+rd-oak+park-mi-48237/id=5425 Zoom-Click to enlarge X Have one to sell? Sell now Get an immediate offer Up to Details about Force 48237 BUSHING, NYLON - SHIFT LEVER (3/8" I.D.) Exhaust Plate Be the first to write a review Force 48237 BUSHING, NYLON - SHIFT LEVER (3/8" error id I.D.) Email to friends Share on Facebook - opens in a new window or tab Share on Twitter - opens in a new window or tab Share on Pinterest - opens in a new window or tab | Add to watch list Seller information boatsmarketplace (22516 ) 99.7%Positive feedback Follow this seller Visit store: BoatsMarketplace error id 48237 See other items More... See all boatsmarketplace has no other items for sale. Item Information Item condition: New Compatibility: See compatible vehicles Quantity: 3 available Please enter a quantity of $qty_dummy$ or less Please enter a quantity of 1 Purchases are limited to $qty_dummy$ per buyer Please enter quantity of 1 or more Please enter a lower number Choose quantity that is less than $qty_dummy1$ or equal to $qty_dummy$ You can only choose quantity that is equal to $qty_dummy$ List price: $1.61 What does this price mean? This is the price (excluding shipping and handling fees) a seller has provided at which the same item, or one that is nearly identical to it, is being offered for sale or has been offered for sale in the recent past. The price may be the seller's own price elsewhere or another seller's price. The "off" amount and percentage simply signifies the calculated difference between the seller-provided price for the item elsewhere and the seller
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