CC: [email protected] CC: [email protected] TO: Manfred Spraul <[email protected]> CC: 0day robot <[email protected]>
Hi Manfred, First bad commit (maybe != root cause): tree: https://github.com/0day-ci/linux/commits/UPDATE-20210821-034214/Rafael-Aquini/ipc-replace-costly-bailout-check-in-sysvipc_find_ipc/20210810-043723 head: a7e49d3717b678a71049996d24ccecfc3cdb0aa1 commit: a7e49d3717b678a71049996d24ccecfc3cdb0aa1 ipc: replace costly bailout check in sysvipc_find_ipc() date: 25 hours ago :::::: branch date: 25 hours ago :::::: commit date: 25 hours ago config: x86_64-rhel-8.3-kselftests (attached as .config) compiler: gcc-9 (Debian 9.3.0-22) 9.3.0 reproduce: # apt-get install sparse # sparse version: v0.6.3-348-gf0e6938b-dirty # https://github.com/0day-ci/linux/commit/a7e49d3717b678a71049996d24ccecfc3cdb0aa1 git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review UPDATE-20210821-034214/Rafael-Aquini/ipc-replace-costly-bailout-check-in-sysvipc_find_ipc/20210810-043723 git checkout a7e49d3717b678a71049996d24ccecfc3cdb0aa1 # save the attached .config to linux build tree make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=x86_64 SHELL=/bin/bash If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <[email protected]> sparse warnings: (new ones prefixed by >>) ipc/util.c:171:29: sparse: sparse: context imbalance in 'ipc_findkey' - wrong count at exit ipc/util.c:277:5: sparse: sparse: context imbalance in 'ipc_addid' - different lock contexts for basic block ipc/util.c:431:27: sparse: sparse: context imbalance in 'ipcget_public' - unexpected unlock >> ipc/util.c:778:9: sparse: sparse: context imbalance in 'sysvipc_find_ipc' - >> wrong count at exit ipc/util.c:789:27: sparse: sparse: context imbalance in 'sysvipc_proc_next' - unexpected unlock ipc/util.c:833:27: sparse: sparse: context imbalance in 'sysvipc_proc_stop' - unexpected unlock vim +/sysvipc_find_ipc +778 ipc/util.c 03f1fc09180b34 Eric W. Biederman 2018-03-23 750 7ca7e564e049d8 Nadia Derbey 2007-10-18 751 /* a7e49d3717b678 Manfred Spraul 2021-08-20 752 * This routine locks the ipc structure found at least at index pos. 7ca7e564e049d8 Nadia Derbey 2007-10-18 753 */ b524b9adb3f655 Adrian Bunk 2008-02-06 754 static struct kern_ipc_perm *sysvipc_find_ipc(struct ipc_ids *ids, loff_t pos, 7ca7e564e049d8 Nadia Derbey 2007-10-18 755 loff_t *new_pos) ae7817745eef3b Mike Waychison 2005-09-06 756 { a7e49d3717b678 Manfred Spraul 2021-08-20 757 int tmpidx; 7ca7e564e049d8 Nadia Derbey 2007-10-18 758 struct kern_ipc_perm *ipc; 73ea41302bab5e Kirill Korotaev 2006-10-02 759 a7e49d3717b678 Manfred Spraul 2021-08-20 760 tmpidx = pos; ae7817745eef3b Mike Waychison 2005-09-06 761 a7e49d3717b678 Manfred Spraul 2021-08-20 762 ipc = idr_get_next(&ids->ipcs_idr, &tmpidx); 7ca7e564e049d8 Nadia Derbey 2007-10-18 763 if (ipc != NULL) { 32a27500109812 Davidlohr Bueso 2013-09-11 764 rcu_read_lock(); 32a27500109812 Davidlohr Bueso 2013-09-11 765 ipc_lock_object(ipc); a7e49d3717b678 Manfred Spraul 2021-08-20 766 /* a7e49d3717b678 Manfred Spraul 2021-08-20 767 * We found the object with the index tmpidx. a7e49d3717b678 Manfred Spraul 2021-08-20 768 * For next search, start with tmpidx+1 a7e49d3717b678 Manfred Spraul 2021-08-20 769 */ a7e49d3717b678 Manfred Spraul 2021-08-20 770 *new_pos = tmpidx + 1; a7e49d3717b678 Manfred Spraul 2021-08-20 771 } else { a7e49d3717b678 Manfred Spraul 2021-08-20 772 /* a7e49d3717b678 Manfred Spraul 2021-08-20 773 * EOF. seq_file can't notice that, thus a7e49d3717b678 Manfred Spraul 2021-08-20 774 * move the offset by one. a7e49d3717b678 Manfred Spraul 2021-08-20 775 */ 5e698222c70257 Vasily Averin 2020-05-13 776 *new_pos = pos + 1; a7e49d3717b678 Manfred Spraul 2021-08-20 777 } 5e698222c70257 Vasily Averin 2020-05-13 @778 return ipc; ae7817745eef3b Mike Waychison 2005-09-06 779 } ae7817745eef3b Mike Waychison 2005-09-06 780 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/[email protected]
.config.gz
Description: application/gzip
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