September 2024 - Kernel - mailweb.openeuler.org

[PATCH openEuler-22.03-LTS-SP1] nilfs2: fix general protection fault in nilfs_btree_insert()
by Yang Yingliang 18 Sep '24

18 Sep '24

From: Ryusuke Konishi <konishi.ryusuke(a)gmail.com> stable inclusion from stable-v5.10.165 commit 712bd74eccb9d3626a0a236641962eca8e11a243 category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/IALLDY CVE: CVE-2023-52900 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id… -------------------------------- commit 7633355e5c7f29c049a9048e461427d1d8ed3051 upstream. If nilfs2 reads a corrupted disk image and tries to reads a b-tree node block by calling __nilfs_btree_get_block() against an invalid virtual block address, it returns -ENOENT because conversion of the virtual block address to a disk block address fails. However, this return value is the same as the internal code that b-tree lookup routines return to indicate that the block being searched does not exist, so functions that operate on that b-tree may misbehave. When nilfs_btree_insert() receives this spurious 'not found' code from nilfs_btree_do_lookup(), it misunderstands that the 'not found' check was successful and continues the insert operation using incomplete lookup path data, causing the following crash: general protection fault, probably for non-canonical address 0xdffffc0000000005: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000028-0x000000000000002f] ... RIP: 0010:nilfs_btree_get_nonroot_node fs/nilfs2/btree.c:418 [inline] RIP: 0010:nilfs_btree_prepare_insert fs/nilfs2/btree.c:1077 [inline] RIP: 0010:nilfs_btree_insert+0x6d3/0x1c10 fs/nilfs2/btree.c:1238 Code: bc 24 80 00 00 00 4c 89 f8 48 c1 e8 03 42 80 3c 28 00 74 08 4c 89 ff e8 4b 02 92 fe 4d 8b 3f 49 83 c7 28 4c 89 f8 48 c1 e8 03 <42> 80 3c 28 00 74 08 4c 89 ff e8 2e 02 92 fe 4d 8b 3f 49 83 c7 02 ... Call Trace: <TASK> nilfs_bmap_do_insert fs/nilfs2/bmap.c:121 [inline] nilfs_bmap_insert+0x20d/0x360 fs/nilfs2/bmap.c:147 nilfs_get_block+0x414/0x8d0 fs/nilfs2/inode.c:101 __block_write_begin_int+0x54c/0x1a80 fs/buffer.c:1991 __block_write_begin fs/buffer.c:2041 [inline] block_write_begin+0x93/0x1e0 fs/buffer.c:2102 nilfs_write_begin+0x9c/0x110 fs/nilfs2/inode.c:261 generic_perform_write+0x2e4/0x5e0 mm/filemap.c:3772 __generic_file_write_iter+0x176/0x400 mm/filemap.c:3900 generic_file_write_iter+0xab/0x310 mm/filemap.c:3932 call_write_iter include/linux/fs.h:2186 [inline] new_sync_write fs/read_write.c:491 [inline] vfs_write+0x7dc/0xc50 fs/read_write.c:584 ksys_write+0x177/0x2a0 fs/read_write.c:637 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd ... </TASK> This patch fixes the root cause of this problem by replacing the error code that __nilfs_btree_get_block() returns on block address conversion failure from -ENOENT to another internal code -EINVAL which means that the b-tree metadata is corrupted. By returning -EINVAL, it propagates without glitches, and for all relevant b-tree operations, functions in the upper bmap layer output an error message indicating corrupted b-tree metadata via nilfs_bmap_convert_error(), and code -EIO will be eventually returned as it should be. Link: https://lkml.kernel.org/r/000000000000bd89e205f0e38355@google.com Link: https://lkml.kernel.org/r/20230105055356.8811-1-konishi.ryusuke@gmail.com Signed-off-by: Ryusuke Konishi <konishi.ryusuke(a)gmail.com> Reported-by: syzbot+ede796cecd5296353515(a)syzkaller.appspotmail.com Tested-by: Ryusuke Konishi <konishi.ryusuke(a)gmail.com> Cc: <stable(a)vger.kernel.org> Signed-off-by: Andrew Morton <akpm(a)linux-foundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> Signed-off-by: Yang Yingliang <yangyingliang(a)huawei.com> --- fs/nilfs2/btree.c | 15 ++++++++++++--- 1 file changed, 12 insertions(+), 3 deletions(-) diff --git a/fs/nilfs2/btree.c b/fs/nilfs2/btree.c index 270c5422df86..90842645328b 100644 --- a/fs/nilfs2/btree.c +++ b/fs/nilfs2/btree.c @@ -480,9 +480,18 @@ static int __nilfs_btree_get_block(const struct nilfs_bmap *btree, __u64 ptr, ret = nilfs_btnode_submit_block(btnc, ptr, 0, REQ_OP_READ, 0, &bh, &submit_ptr); if (ret) { - if (ret != -EEXIST) - return ret; - goto out_check; + if (likely(ret == -EEXIST)) + goto out_check; + if (ret == -ENOENT) { + /* + * Block address translation failed due to invalid + * value of 'ptr'. In this case, return internal code + * -EINVAL (broken bmap) to notify bmap layer of fatal + * metadata corruption. + */ + ret = -EINVAL; + } + return ret; } if (ra) { -- 2.25.1

2 1

[PATCH openEuler-22.03-LTS-SP1] NFSD: Fix ia_size underflow
by Xia Fukun 18 Sep '24

18 Sep '24

From: Chuck Lever <chuck.lever(a)oracle.com> stable inclusion from stable-v5.10.221 commit 38d02ba22e43b6fc7d291cf724bc6e3b7be6626b category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/IADGCI CVE: CVE-2022-48828 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=… -------------------------------- [ Upstream commit e6faac3f58c7c4176b66f63def17a34232a17b0e ] iattr::ia_size is a loff_t, which is a signed 64-bit type. NFSv3 and NFSv4 both define file size as an unsigned 64-bit type. Thus there is a range of valid file size values an NFS client can send that is already larger than Linux can handle. Currently decode_fattr4() dumps a full u64 value into ia_size. If that value happens to be larger than S64_MAX, then ia_size underflows. I'm about to fix up the NFSv3 behavior as well, so let's catch the underflow in the common code path: nfsd_setattr(). Cc: stable(a)vger.kernel.org [ cel: context adjusted, 2f221d6f7b88 has not been applied ] Signed-off-by: Chuck Lever <chuck.lever(a)oracle.com> Signed-off-by: Sasha Levin <sashal(a)kernel.org> Signed-off-by: Xia Fukun <xiafukun(a)huawei.com> --- fs/nfsd/vfs.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/fs/nfsd/vfs.c b/fs/nfsd/vfs.c index 31edb883afd0d..7820945e2d075 100644 --- a/fs/nfsd/vfs.c +++ b/fs/nfsd/vfs.c @@ -448,6 +448,10 @@ nfsd_setattr(struct svc_rqst *rqstp, struct svc_fh *fhp, struct iattr *iap, .ia_size = iap->ia_size, }; + host_err = -EFBIG; + if (iap->ia_size < 0) + goto out_unlock; + host_err = notify_change(dentry, &size_attr, NULL); if (host_err) goto out_unlock; -- 2.34.1

2 1

[PATCH OLK-5.10] NFSD: Fix ia_size underflow
by Xia Fukun 18 Sep '24

18 Sep '24

From: Chuck Lever <chuck.lever(a)oracle.com> stable inclusion from stable-v5.10.221 commit 38d02ba22e43b6fc7d291cf724bc6e3b7be6626b category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/IADGCI CVE: CVE-2022-48828 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=… -------------------------------- [ Upstream commit e6faac3f58c7c4176b66f63def17a34232a17b0e ] iattr::ia_size is a loff_t, which is a signed 64-bit type. NFSv3 and NFSv4 both define file size as an unsigned 64-bit type. Thus there is a range of valid file size values an NFS client can send that is already larger than Linux can handle. Currently decode_fattr4() dumps a full u64 value into ia_size. If that value happens to be larger than S64_MAX, then ia_size underflows. I'm about to fix up the NFSv3 behavior as well, so let's catch the underflow in the common code path: nfsd_setattr(). Cc: stable(a)vger.kernel.org [ cel: context adjusted, 2f221d6f7b88 has not been applied ] Signed-off-by: Chuck Lever <chuck.lever(a)oracle.com> Signed-off-by: Sasha Levin <sashal(a)kernel.org> Signed-off-by: Xia Fukun <xiafukun(a)huawei.com> --- fs/nfsd/vfs.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/fs/nfsd/vfs.c b/fs/nfsd/vfs.c index 31edb883afd0d..7820945e2d075 100644 --- a/fs/nfsd/vfs.c +++ b/fs/nfsd/vfs.c @@ -448,6 +448,10 @@ nfsd_setattr(struct svc_rqst *rqstp, struct svc_fh *fhp, struct iattr *iap, .ia_size = iap->ia_size, }; + host_err = -EFBIG; + if (iap->ia_size < 0) + goto out_unlock; + host_err = notify_change(dentry, &size_attr, NULL); if (host_err) goto out_unlock; -- 2.34.1

2 1

[PATCH OLK-6.6 0/8] support poison recover from migrate folio
by Tong Tiangen 18 Sep '24

18 Sep '24

The folio migration is widely used in kernel, memory compaction, memory hotplug, soft offline page, numa balance, memory demote/promotion, etc, but once access a poisoned source folio when migrating, the kernel will panic. There is a mechanism in the kernel to recover from uncorrectable memory errors, ARCH_HAS_COPY_MC(eg, Machine Check Safe Memory Copy on x86), which is already used in NVDIMM or core-mm paths(eg, CoW, khugepaged, coredump, ksm copy), see copy_mc_to_{user,kernel}, copy_mc_{user_}highpage callers. This series of patches provide the recovery mechanism from folio copy for the widely used folio migration. Please note, because folio migration is no guarantee of success, so we could chose to make folio migration tolerant of memory failures, adding folio_mc_copy() which is a #MC versions of folio_copy(), once accessing a poisoned source folio, we could return error and make the folio migration fail, and this could avoid the similar panic shown below. CPU: 1 PID: 88343 Comm: test_softofflin Kdump: loaded Not tainted 6.6.0 pc : copy_page+0x10/0xc0 lr : copy_highpage+0x38/0x50 ... Call trace: copy_page+0x10/0xc0 folio_copy+0x78/0x90 migrate_folio_extra+0x54/0xa0 move_to_new_folio+0xd8/0x1f0 migrate_folio_move+0xb8/0x300 migrate_pages_batch+0x528/0x788 migrate_pages_sync+0x8c/0x258 migrate_pages+0x440/0x528 soft_offline_in_use_page+0x2ec/0x3c0 soft_offline_page+0x238/0x310 soft_offline_page_store+0x6c/0xc0 dev_attr_store+0x20/0x40 sysfs_kf_write+0x4c/0x68 kernfs_fop_write_iter+0x130/0x1c8 new_sync_write+0xa4/0x138 vfs_write+0x238/0x2d8 ksys_write+0x74/0x110 Kefeng Wang (8): mm: migrate: simplify __buffer_migrate_folio() mm: migrate_device: unify migrate folio for MIGRATE_SYNC_NO_COPY mm: migrate: remove migrate_folio_extra() mm: move memory_failure_queue() into copy_mc_[user]_highpage() mm: add folio_mc_copy() mm: migrate: split folio_migrate_mapping() mm: migrate: support poisoned recover from migrate folio fs: hugetlbfs: support poisoned recover from hugetlbfs_migrate_folio() fs/hugetlbfs/inode.c | 5 +- include/linux/highmem.h | 6 +++ include/linux/migrate.h | 2 - include/linux/mm.h | 1 + mm/ksm.c | 1 - mm/memory.c | 13 ++--- mm/migrate.c | 102 ++++++++++++++++++++-------------------- mm/migrate_device.c | 16 ++++--- mm/util.c | 17 +++++++ 9 files changed, 88 insertions(+), 75 deletions(-) -- 2.25.1

2 9

[openeuler:openEuler-1.0-LTS 20295/23714] drivers/net/bonding/bond_sysctl.c:9:25: sparse: sparse: symbol 'bond_broadcast_arp_or_nd_table_header' was not declared. Should it be static?
by kernel test robot 17 Sep '24

17 Sep '24

tree: https://gitee.com/openeuler/kernel.git openEuler-1.0-LTS head: 37aeb7e817053fbf532b214aa02858b3c23af0b1 commit: 0397c33121652647d544d4bcdceb9f2d868146af [20295/23714] anolis: bond: broadcast ARP or ND messages to all slaves config: x86_64-randconfig-123-20240915 (https://download.01.org/0day-ci/archive/20240917/202409170243.8clAJD1d-lkp@…) compiler: gcc-12 (Debian 12.2.0-14) 12.2.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240917/202409170243.8clAJD1d-lkp@…) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <lkp(a)intel.com> | Closes: https://lore.kernel.org/oe-kbuild-all/202409170243.8clAJD1d-lkp@intel.com/ sparse warnings: (new ones prefixed by >>) >> drivers/net/bonding/bond_sysctl.c:9:25: sparse: sparse: symbol 'bond_broadcast_arp_or_nd_table_header' was not declared. Should it be static? vim +/bond_broadcast_arp_or_nd_table_header +9 drivers/net/bonding/bond_sysctl.c 8 > 9 struct ctl_table_header *bond_broadcast_arp_or_nd_table_header; 10 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki

1 0

[openeuler:openEuler-1.0-LTS 19376/23714] net/ax25/ax25_dev.o: warning: objtool: missing symbol for section .exit.text
by kernel test robot 17 Sep '24

17 Sep '24

tree: https://gitee.com/openeuler/kernel.git openEuler-1.0-LTS head: 37aeb7e817053fbf532b214aa02858b3c23af0b1 commit: 5ba8a3eb026f02aa75f4a22099250bfd4db659cb [19376/23714] ax25: add refcount in ax25_dev to avoid UAF bugs config: x86_64-buildonly-randconfig-005-20240915 (https://download.01.org/0day-ci/archive/20240917/202409170005.Q9skpI8V-lkp@…) compiler: clang version 18.1.8 (https://github.com/llvm/llvm-project 3b5b5c1ec4a3095ab096dd780e84d7ab81f3d7ff) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240917/202409170005.Q9skpI8V-lkp@…) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <lkp(a)intel.com> | Closes: https://lore.kernel.org/oe-kbuild-all/202409170005.Q9skpI8V-lkp@intel.com/ All warnings (new ones prefixed by >>): >> net/ax25/ax25_dev.o: warning: objtool: missing symbol for section .exit.text -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki

1 0

[openeuler:openEuler-1.0-LTS 9570/23714] drivers/scsi/scsi_logging.o: warning: objtool: missing symbol for section .text
by kernel test robot 16 Sep '24

16 Sep '24

Hi Bart, FYI, the error/warning still remains. tree: https://gitee.com/openeuler/kernel.git openEuler-1.0-LTS head: 37aeb7e817053fbf532b214aa02858b3c23af0b1 commit: 63b053c4efdb2e27f350bc9c1db4fed08a30801d [9570/23714] scsi: core: Reduce memory required for SCSI logging config: x86_64-buildonly-randconfig-002-20240915 (https://download.01.org/0day-ci/archive/20240916/202409162223.ddty3va3-lkp@…) compiler: gcc-12 (Debian 12.2.0-14) 12.2.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240916/202409162223.ddty3va3-lkp@…) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <lkp(a)intel.com> | Closes: https://lore.kernel.org/oe-kbuild-all/202409162223.ddty3va3-lkp@intel.com/ All warnings (new ones prefixed by >>): >> drivers/scsi/scsi_logging.o: warning: objtool: missing symbol for section .text -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki

1 0

[openeuler:openEuler-1.0-LTS 17157/23714] drivers/md/bcache/request.c:1333:27: sparse: sparse: incorrect type in argument 1 (different address spaces)
by kernel test robot 16 Sep '24

16 Sep '24

tree: https://gitee.com/openeuler/kernel.git openEuler-1.0-LTS head: 37aeb7e817053fbf532b214aa02858b3c23af0b1 commit: cb004e127a5500466043986dbc4cc43ec63d849e [17157/23714] Add traffic policy for low cache available. config: x86_64-randconfig-123-20240915 (https://download.01.org/0day-ci/archive/20240916/202409162232.mD47BzHq-lkp@…) compiler: gcc-12 (Debian 12.2.0-14) 12.2.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240916/202409162232.mD47BzHq-lkp@…) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <lkp(a)intel.com> | Closes: https://lore.kernel.org/oe-kbuild-all/202409162232.mD47BzHq-lkp@intel.com/ sparse warnings: (new ones prefixed by >>) drivers/md/bcache/request.c: note: in included file (through drivers/md/bcache/bcache.h): include/uapi/linux/bcache.h:294:38: sparse: sparse: array of flexible structures drivers/md/bcache/request.c: note: in included file (through drivers/md/bcache/bcache.h): drivers/md/bcache/bset.h:231:36: sparse: sparse: array of flexible structures >> drivers/md/bcache/request.c:1333:27: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void [noderef] <asn:1> *to @@ got struct get_bcache_status * @@ drivers/md/bcache/request.c:1333:27: sparse: expected void [noderef] <asn:1> *to drivers/md/bcache/request.c:1333:27: sparse: got struct get_bcache_status * >> drivers/md/bcache/request.c:1346:33: sparse: sparse: incorrect type in argument 2 (different address spaces) @@ expected void const [noderef] <asn:1> *from @@ got struct set_bcache_status * @@ drivers/md/bcache/request.c:1346:33: sparse: expected void const [noderef] <asn:1> *from drivers/md/bcache/request.c:1346:33: sparse: got struct set_bcache_status * vim +1333 drivers/md/bcache/request.c 1315 1316 static int bcache_get_write_status(struct cached_dev *dc, unsigned long arg) 1317 { 1318 struct get_bcache_status a; 1319 uint64_t cache_sectors; 1320 struct cache_set *c = dc->disk.c; 1321 1322 if (c == NULL) 1323 return -ENODEV; 1324 1325 a.writeback_sector_size_per_sec = dc->writeback_sector_size_per_sec; 1326 a.writeback_io_num_per_sec = dc->writeback_io_num_per_sec; 1327 a.front_io_num_per_sec = dc->front_io_num_per_sec; 1328 cache_sectors = c->nbuckets * c->sb.bucket_size - 1329 atomic_long_read(&c->flash_dev_dirty_sectors); 1330 a.dirty_rate = div64_u64(bcache_dev_sectors_dirty(&dc->disk) * 100, 1331 cache_sectors); 1332 a.available = 100 - c->gc_stats.in_use; > 1333 if (copy_to_user((struct get_bcache_status *)arg, &a, 1334 sizeof(struct get_bcache_status))) 1335 return -EFAULT; 1336 return 0; 1337 } 1338 1339 static int bcache_set_write_status(struct cached_dev *dc, unsigned long arg) 1340 { 1341 struct set_bcache_status a; 1342 struct cache_set *c = dc->disk.c; 1343 1344 if (c == NULL) 1345 return -ENODEV; > 1346 if (copy_from_user(&a, (struct set_bcache_status *)arg, 1347 sizeof(struct set_bcache_status))) 1348 return -EFAULT; 1349 1350 if (c->traffic_policy_start != a.traffic_policy_start) 1351 pr_info("%s traffic policy %s", dc->disk.disk->disk_name, 1352 (a.traffic_policy_start == true) ? "enable" : "disable"); 1353 if (c->force_write_through != a.force_write_through) 1354 pr_info("%s force write through %s", dc->disk.disk->disk_name, 1355 (a.force_write_through == true) ? "enable" : "disable"); 1356 if (a.trigger_gc) { 1357 pr_info("trigger %s gc", dc->disk.disk->disk_name); 1358 atomic_set(&c->sectors_to_gc, -1); 1359 wake_up_gc(c); 1360 } 1361 if ((a.cutoff_writeback_sync >= MIN_CUTOFF_WRITEBACK_SYNC) && 1362 (a.cutoff_writeback_sync <= MAX_CUTOFF_WRITEBACK_SYNC)) { 1363 c->cutoff_writeback_sync = a.cutoff_writeback_sync; 1364 } 1365 1366 dc->max_sector_size = a.write_token_sector_size; 1367 dc->max_io_num = a.write_token_io_num; 1368 c->traffic_policy_start = a.traffic_policy_start; 1369 c->force_write_through = a.force_write_through; 1370 c->gc_sectors = a.gc_sectors; 1371 dc->writeback_state = a.writeback_state; 1372 return 0; 1373 } 1374 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki

1 0

[openeuler:openEuler-1.0-LTS 15748/23714] include/linux/uaccess.h:112:17: warning: 'kmask' may be used uninitialized
by kernel test robot 16 Sep '24

16 Sep '24

tree: https://gitee.com/openeuler/kernel.git openEuler-1.0-LTS head: 37aeb7e817053fbf532b214aa02858b3c23af0b1 commit: b77633c8236f2383f8d994249b40ed1bd3d012c0 [15748/23714] signal: simplify set_user_sigmask/restore_user_sigmask config: arm64-randconfig-001-20240913 (https://download.01.org/0day-ci/archive/20240916/202409162133.aY7fqmYk-lkp@…) compiler: aarch64-linux-gcc (GCC) 14.1.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240916/202409162133.aY7fqmYk-lkp@…) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <lkp(a)intel.com> | Closes: https://lore.kernel.org/oe-kbuild-all/202409162133.aY7fqmYk-lkp@intel.com/ Note: it may well be a FALSE warning. FWIW you are at least aware of it now. http://gcc.gnu.org/wiki/Better_Uninitialized_Warnings All warnings (new ones prefixed by >>): | ^~~~~~~~~~~ In file included from include/asm-generic/termios.h:6, from ./arch/arm64/include/generated/uapi/asm/termios.h:1, from include/uapi/linux/termios.h:6, from include/linux/tty.h:7, from kernel/signal.c:23: In function '_copy_from_user', inlined from 'copy_from_user' at include/linux/uaccess.h:144:7, inlined from '__do_sys_sigaltstack' at kernel/signal.c:3635:13, inlined from '__se_sys_sigaltstack' at kernel/signal.c:3631:1: include/linux/uaccess.h:112:17: warning: 'new' may be used uninitialized [-Wmaybe-uninitialized] 112 | kasan_check_write(to, n); | ^~~~~~~~~~~~~~~~~~~~~~~~ In file included from include/linux/compiler.h:251, from include/asm-generic/bug.h:5, from arch/arm64/include/asm/bug.h:37, from include/linux/bug.h:5, from include/linux/mmdebug.h:5, from include/linux/gfp.h:5, from include/linux/slab.h:15, from kernel/signal.c:13: include/linux/kasan-checks.h: In function '__se_sys_sigaltstack': include/linux/kasan-checks.h:7:6: note: by argument 1 of type 'const volatile void *' to 'kasan_check_write' declared here 7 | void kasan_check_write(const volatile void *p, unsigned int size); | ^~~~~~~~~~~~~~~~~ kernel/signal.c:3633:17: note: 'new' declared here 3633 | stack_t new, old; | ^~~ In function '_copy_from_user', inlined from 'copy_from_user' at include/linux/uaccess.h:144:7, inlined from 'do_compat_sigaltstack' at kernel/signal.c:3678:7: include/linux/uaccess.h:112:17: warning: 'uss32' may be used uninitialized [-Wmaybe-uninitialized] 112 | kasan_check_write(to, n); | ^~~~~~~~~~~~~~~~~~~~~~~~ include/linux/kasan-checks.h: In function 'do_compat_sigaltstack': include/linux/kasan-checks.h:7:6: note: by argument 1 of type 'const volatile void *' to 'kasan_check_write' declared here 7 | void kasan_check_write(const volatile void *p, unsigned int size); | ^~~~~~~~~~~~~~~~~ kernel/signal.c:3677:32: note: 'uss32' declared here 3677 | compat_stack_t uss32; | ^~~~~ In function '_copy_from_user', inlined from 'copy_from_user' at include/linux/uaccess.h:144:7, inlined from '__do_sys_rt_tgsigqueueinfo' at kernel/signal.c:3496:6, inlined from '__se_sys_rt_tgsigqueueinfo' at kernel/signal.c:3491:1: include/linux/uaccess.h:112:17: warning: 'info' may be used uninitialized [-Wmaybe-uninitialized] 112 | kasan_check_write(to, n); | ^~~~~~~~~~~~~~~~~~~~~~~~ include/linux/kasan-checks.h: In function '__se_sys_rt_tgsigqueueinfo': include/linux/kasan-checks.h:7:6: note: by argument 1 of type 'const volatile void *' to 'kasan_check_write' declared here 7 | void kasan_check_write(const volatile void *p, unsigned int size); | ^~~~~~~~~~~~~~~~~ kernel/signal.c:3494:19: note: 'info' declared here 3494 | siginfo_t info; | ^~~~ In function '_copy_from_user', inlined from 'copy_from_user' at include/linux/uaccess.h:144:7, inlined from '__do_sys_rt_sigqueueinfo' at kernel/signal.c:3454:6, inlined from '__se_sys_rt_sigqueueinfo' at kernel/signal.c:3450:1: include/linux/uaccess.h:112:17: warning: 'info' may be used uninitialized [-Wmaybe-uninitialized] 112 | kasan_check_write(to, n); | ^~~~~~~~~~~~~~~~~~~~~~~~ include/linux/kasan-checks.h: In function '__se_sys_rt_sigqueueinfo': include/linux/kasan-checks.h:7:6: note: by argument 1 of type 'const volatile void *' to 'kasan_check_write' declared here 7 | void kasan_check_write(const volatile void *p, unsigned int size); | ^~~~~~~~~~~~~~~~~ kernel/signal.c:3453:19: note: 'info' declared here 3453 | siginfo_t info; | ^~~~ In function '_copy_from_user', inlined from 'copy_from_user' at include/linux/uaccess.h:144:7, inlined from '__do_sys_sigprocmask' at kernel/signal.c:3783:7, inlined from '__se_sys_sigprocmask' at kernel/signal.c:3774:1: include/linux/uaccess.h:112:17: warning: 'new_set' may be used uninitialized [-Wmaybe-uninitialized] 112 | kasan_check_write(to, n); | ^~~~~~~~~~~~~~~~~~~~~~~~ include/linux/kasan-checks.h: In function '__se_sys_sigprocmask': include/linux/kasan-checks.h:7:6: note: by argument 1 of type 'const volatile void *' to 'kasan_check_write' declared here 7 | void kasan_check_write(const volatile void *p, unsigned int size); | ^~~~~~~~~~~~~~~~~ kernel/signal.c:3777:31: note: 'new_set' declared here 3777 | old_sigset_t old_set, new_set; | ^~~~~~~ In function '_copy_from_user', inlined from 'copy_from_user' at include/linux/uaccess.h:144:7, inlined from '__do_sys_rt_sigprocmask' at kernel/signal.c:2887:7, inlined from '__se_sys_rt_sigprocmask' at kernel/signal.c:2874:1: include/linux/uaccess.h:112:17: warning: 'new_set' may be used uninitialized [-Wmaybe-uninitialized] 112 | kasan_check_write(to, n); | ^~~~~~~~~~~~~~~~~~~~~~~~ include/linux/kasan-checks.h: In function '__se_sys_rt_sigprocmask': include/linux/kasan-checks.h:7:6: note: by argument 1 of type 'const volatile void *' to 'kasan_check_write' declared here 7 | void kasan_check_write(const volatile void *p, unsigned int size); | ^~~~~~~~~~~~~~~~~ kernel/signal.c:2877:27: note: 'new_set' declared here 2877 | sigset_t old_set, new_set; | ^~~~~~~ In function '_copy_from_user', inlined from 'copy_from_user' at include/linux/uaccess.h:144:7, inlined from 'set_user_sigmask' at kernel/signal.c:2836:6: >> include/linux/uaccess.h:112:17: warning: 'kmask' may be used uninitialized [-Wmaybe-uninitialized] 112 | kasan_check_write(to, n); | ^~~~~~~~~~~~~~~~~~~~~~~~ include/linux/kasan-checks.h: In function 'set_user_sigmask': include/linux/kasan-checks.h:7:6: note: by argument 1 of type 'const volatile void *' to 'kasan_check_write' declared here 7 | void kasan_check_write(const volatile void *p, unsigned int size); | ^~~~~~~~~~~~~~~~~ kernel/signal.c:2830:18: note: 'kmask' declared here 2830 | sigset_t kmask; | ^~~~~ In function '_copy_from_user', inlined from 'copy_from_user' at include/linux/uaccess.h:144:7, inlined from '__do_sys_rt_sigtimedwait' at kernel/signal.c:3281:6, inlined from '__se_sys_rt_sigtimedwait' at kernel/signal.c:3268:1: include/linux/uaccess.h:112:17: warning: 'these' may be used uninitialized [-Wmaybe-uninitialized] 112 | kasan_check_write(to, n); | ^~~~~~~~~~~~~~~~~~~~~~~~ include/linux/kasan-checks.h: In function '__se_sys_rt_sigtimedwait': include/linux/kasan-checks.h:7:6: note: by argument 1 of type 'const volatile void *' to 'kasan_check_write' declared here 7 | void kasan_check_write(const volatile void *p, unsigned int size); | ^~~~~~~~~~~~~~~~~ kernel/signal.c:3272:18: note: 'these' declared here 3272 | sigset_t these; | ^~~~~ In function '_copy_from_user', inlined from 'copy_from_user' at include/linux/uaccess.h:144:7, inlined from 'copy_siginfo_from_user32' at kernel/signal.c:3125:6: include/linux/uaccess.h:112:17: warning: 'from' may be used uninitialized [-Wmaybe-uninitialized] 112 | kasan_check_write(to, n); | ^~~~~~~~~~~~~~~~~~~~~~~~ include/linux/kasan-checks.h: In function 'copy_siginfo_from_user32': include/linux/kasan-checks.h:7:6: note: by argument 1 of type 'const volatile void *' to 'kasan_check_write' declared here 7 | void kasan_check_write(const volatile void *p, unsigned int size); | ^~~~~~~~~~~~~~~~~ kernel/signal.c:3123:31: note: 'from' declared here 3123 | struct compat_siginfo from; | ^~~~ In function '_copy_from_user', inlined from 'copy_from_user' at include/linux/uaccess.h:144:7, inlined from '__do_sys_rt_sigaction' at kernel/signal.c:3834:13, inlined from '__se_sys_rt_sigaction' at kernel/signal.c:3822:1: include/linux/uaccess.h:112:17: warning: 'new_sa' may be used uninitialized [-Wmaybe-uninitialized] 112 | kasan_check_write(to, n); | ^~~~~~~~~~~~~~~~~~~~~~~~ include/linux/kasan-checks.h: In function '__se_sys_rt_sigaction': include/linux/kasan-checks.h:7:6: note: by argument 1 of type 'const volatile void *' to 'kasan_check_write' declared here 7 | void kasan_check_write(const volatile void *p, unsigned int size); | ^~~~~~~~~~~~~~~~~ kernel/signal.c:3827:28: note: 'new_sa' declared here 3827 | struct k_sigaction new_sa, old_sa; | ^~~~~~ In function '_copy_from_user', inlined from 'copy_from_user' at include/linux/uaccess.h:144:7, inlined from 'restore_altstack' at kernel/signal.c:3648:6: include/linux/uaccess.h:112:17: warning: 'new' may be used uninitialized [-Wmaybe-uninitialized] 112 | kasan_check_write(to, n); | ^~~~~~~~~~~~~~~~~~~~~~~~ include/linux/kasan-checks.h: In function 'restore_altstack': include/linux/kasan-checks.h:7:6: note: by argument 1 of type 'const volatile void *' to 'kasan_check_write' declared here 7 | void kasan_check_write(const volatile void *p, unsigned int size); | ^~~~~~~~~~~~~~~~~ kernel/signal.c:3647:17: note: 'new' declared here 3647 | stack_t new; | ^~~ In function '_copy_from_user', inlined from 'copy_from_user' at include/linux/uaccess.h:144:7, inlined from '__do_sys_rt_sigsuspend' at kernel/signal.c:4053:6, inlined from '__se_sys_rt_sigsuspend' at kernel/signal.c:4045:1, inlined from '__arm64_sys_rt_sigsuspend' at kernel/signal.c:4045:1: include/linux/uaccess.h:112:17: warning: 'newset' may be used uninitialized [-Wmaybe-uninitialized] 112 | kasan_check_write(to, n); | ^~~~~~~~~~~~~~~~~~~~~~~~ include/linux/kasan-checks.h: In function '__arm64_sys_rt_sigsuspend': include/linux/kasan-checks.h:7:6: note: by argument 1 of type 'const volatile void *' to 'kasan_check_write' declared here 7 | void kasan_check_write(const volatile void *p, unsigned int size); | ^~~~~~~~~~~~~~~~~ kernel/signal.c:4047:18: note: 'newset' declared here 4047 | sigset_t newset; | ^~~~~~ vim +/kmask +112 include/linux/uaccess.h d597580d373774 Al Viro 2017-03-20 104 d597580d373774 Al Viro 2017-03-20 105 #ifdef INLINE_COPY_FROM_USER d597580d373774 Al Viro 2017-03-20 106 static inline unsigned long d597580d373774 Al Viro 2017-03-20 107 _copy_from_user(void *to, const void __user *from, unsigned long n) d597580d373774 Al Viro 2017-03-20 108 { d597580d373774 Al Viro 2017-03-20 109 unsigned long res = n; 9c5f6908de03a4 Al Viro 2017-06-29 110 might_fault(); 4983cb67a383a7 Linus Torvalds 2019-02-14 111 if (likely(access_ok(from, n))) { 9c5f6908de03a4 Al Viro 2017-06-29 @112 kasan_check_write(to, n); d597580d373774 Al Viro 2017-03-20 113 res = raw_copy_from_user(to, from, n); 9c5f6908de03a4 Al Viro 2017-06-29 114 } d597580d373774 Al Viro 2017-03-20 115 if (unlikely(res)) d597580d373774 Al Viro 2017-03-20 116 memset(to + (n - res), 0, res); d597580d373774 Al Viro 2017-03-20 117 return res; d597580d373774 Al Viro 2017-03-20 118 } d597580d373774 Al Viro 2017-03-20 119 #else d597580d373774 Al Viro 2017-03-20 120 extern unsigned long d597580d373774 Al Viro 2017-03-20 121 _copy_from_user(void *, const void __user *, unsigned long); d597580d373774 Al Viro 2017-03-20 122 #endif d597580d373774 Al Viro 2017-03-20 123 :::::: The code at line 112 was first introduced by commit :::::: 9c5f6908de03a4f52ba7364b11fcd6116225480c copy_{from,to}_user(): move kasan checks and might_fault() out-of-line :::::: TO: Al Viro <viro(a)zeniv.linux.org.uk> :::::: CC: Al Viro <viro(a)zeniv.linux.org.uk> -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki

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[openeuler:openEuler-1.0-LTS 16693/23714] arch/x86/kernel/unwind_orc.o: warning: objtool: missing symbol for section .text
by kernel test robot 16 Sep '24

16 Sep '24

tree: https://gitee.com/openeuler/kernel.git openEuler-1.0-LTS head: 37aeb7e817053fbf532b214aa02858b3c23af0b1 commit: badd79c400ed404df871e1d035bed971d20ead4c [16693/23714] x86/unwind/orc: Remove boot-time ORC unwind tables sorting config: x86_64-buildonly-randconfig-005-20240915 (https://download.01.org/0day-ci/archive/20240916/202409162123.h3UocbtQ-lkp@…) compiler: clang version 18.1.8 (https://github.com/llvm/llvm-project 3b5b5c1ec4a3095ab096dd780e84d7ab81f3d7ff) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240916/202409162123.h3UocbtQ-lkp@…) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <lkp(a)intel.com> | Closes: https://lore.kernel.org/oe-kbuild-all/202409162123.h3UocbtQ-lkp@intel.com/ All warnings (new ones prefixed by >>): arch/x86/kernel/unwind_orc.c:179:13: warning: unused function 'orc_sort_swap' [-Wunused-function] 179 | static void orc_sort_swap(void *_a, void *_b, int size) | ^~~~~~~~~~~~~ arch/x86/kernel/unwind_orc.c:199:12: warning: unused function 'orc_sort_cmp' [-Wunused-function] 199 | static int orc_sort_cmp(const void *_a, const void *_b) | ^~~~~~~~~~~~ 2 warnings generated. >> arch/x86/kernel/unwind_orc.o: warning: objtool: missing symbol for section .text -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki

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