#syz test On Sat, Oct 5, 2024 at 8:02 PM syzbot <syzbot+01218003be74b5e1213a@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote: > > Hello, > > syzbot found the following issue on: > > HEAD commit: e32cde8d2bd7 Merge tag 'sched_ext-for-6.12-rc1-fixes-1' > of.. > git tree: upstream > console+strace: > https://urldefense.com/v3/__https://syzkaller.appspot.com/x/log.txt?x=16cf7d > d0580000__;!!JmoZiZGBv3RvKRSx!_EFM31JxDI_sBC6NhWwWIWcja8UUVBXZY > WyhK0O9vUuSsqy-ZOla4TuepNTA3X-btBmzePMIOD0CGeGE0kSF4M2hOwVy5 > 7mr5yQIbTA6$ > kernel config: > https://urldefense.com/v3/__https://syzkaller.appspot.com/x/.config?x=b1fd45 > f2013d812f__;!!JmoZiZGBv3RvKRSx!_EFM31JxDI_sBC6NhWwWIWcja8UUVBX > ZYWyhK0O9vUuSsqy-ZOla4TuepNTA3X-btBmzePMIOD0CGeGE0kSF4M2hOwV > y57mr50IfSXOd$ > dashboard link: > https://urldefense.com/v3/__https://syzkaller.appspot.com/bug?extid=012180 > 03be74b5e1213a__;!!JmoZiZGBv3RvKRSx!_EFM31JxDI_sBC6NhWwWIWcja8U > UVBXZYWyhK0O9vUuSsqy-ZOla4TuepNTA3X-btBmzePMIOD0CGeGE0kSF4M2h > OwVy57mr5-IoYOKx$ > compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) > 2.40 > syz repro: > https://urldefense.com/v3/__https://syzkaller.appspot.com/x/repro.syz?x=11cf > 7dd0580000__;!!JmoZiZGBv3RvKRSx!_EFM31JxDI_sBC6NhWwWIWcja8UUVB > XZYWyhK0O9vUuSsqy-ZOla4TuepNTA3X-btBmzePMIOD0CGeGE0kSF4M2hOw > Vy57mr58TvVCus$ > C reproducer: > https://urldefense.com/v3/__https://syzkaller.appspot.com/x/repro.c?x=11d06 > 580580000__;!!JmoZiZGBv3RvKRSx!_EFM31JxDI_sBC6NhWwWIWcja8UUVBXZ > YWyhK0O9vUuSsqy-ZOla4TuepNTA3X-btBmzePMIOD0CGeGE0kSF4M2hOwVy > 57mr5w2Sgp57$ > > Downloadable assets: > disk image: > https://urldefense.com/v3/__https://storage.googleapis.com/syzbot-assets/16 > d4da549bf4/disk-e32cde8d.raw.xz__;!!JmoZiZGBv3RvKRSx!_EFM31JxDI_sBC6 > NhWwWIWcja8UUVBXZYWyhK0O9vUuSsqy-ZOla4TuepNTA3X-btBmzePMIOD0 > CGeGE0kSF4M2hOwVy57mr54CRCyjy$ > vmlinux: > https://urldefense.com/v3/__https://storage.googleapis.com/syzbot-assets/a01 > bc9a0e174/vmlinux-e32cde8d.xz__;!!JmoZiZGBv3RvKRSx!_EFM31JxDI_sBC6N > hWwWIWcja8UUVBXZYWyhK0O9vUuSsqy-ZOla4TuepNTA3X-btBmzePMIOD0C > GeGE0kSF4M2hOwVy57mr5_9fwsZ2$ > kernel image: > https://urldefense.com/v3/__https://storage.googleapis.com/syzbot-assets/93f > 4dfad6909/bzImage-e32cde8d.xz__;!!JmoZiZGBv3RvKRSx!_EFM31JxDI_sBC6N > hWwWIWcja8UUVBXZYWyhK0O9vUuSsqy-ZOla4TuepNTA3X-btBmzePMIOD0C > GeGE0kSF4M2hOwVy57mr54HU84Yj$ > mounted in repro: > https://urldefense.com/v3/__https://storage.googleapis.com/syzbot-assets/43 > 3ba0700154/mount_0.gz__;!!JmoZiZGBv3RvKRSx!_EFM31JxDI_sBC6NhWwWI > Wcja8UUVBXZYWyhK0O9vUuSsqy-ZOla4TuepNTA3X-btBmzePMIOD0CGeGE0k > SF4M2hOwVy57mr51x55siW$ > > IMPORTANT: if you fix the issue, please add the following tag to the commit: > Reported-by: > mailto:syzbot+01218003be74b5e1213a@xxxxxxxxxxxxxxxxxxxxxxxxx > > exFAT-fs (loop0): failed to load upcase table (idx : 0x00010000, chksum : > 0x726052d3, utbl_chksum : 0xe619d30d) > ===================================================== > BUG: KMSAN: uninit-value in __exfat_get_dentry_set+0x10ca/0x14d0 > fs/exfat/dir.c:804 > __exfat_get_dentry_set+0x10ca/0x14d0 fs/exfat/dir.c:804 > exfat_get_dentry_set+0x58/0xec0 fs/exfat/dir.c:859 > __exfat_write_inode+0x3c1/0xe30 fs/exfat/inode.c:46 > __exfat_truncate+0x7f3/0xbb0 fs/exfat/file.c:211 > exfat_truncate+0xee/0x2a0 fs/exfat/file.c:257 > exfat_write_failed fs/exfat/inode.c:421 [inline] > exfat_direct_IO+0x5a3/0x900 fs/exfat/inode.c:485 > generic_file_direct_write+0x275/0x6a0 mm/filemap.c:3977 > __generic_file_write_iter+0x242/0x460 mm/filemap.c:4141 > exfat_file_write_iter+0x894/0xfb0 fs/exfat/file.c:598 > do_iter_readv_writev+0x88a/0xa30 > vfs_writev+0x56a/0x14f0 fs/read_write.c:1064 > do_pwritev fs/read_write.c:1165 [inline] > __do_sys_pwritev2 fs/read_write.c:1224 [inline] > __se_sys_pwritev2+0x280/0x470 fs/read_write.c:1215 > __x64_sys_pwritev2+0x11f/0x1a0 fs/read_write.c:1215 > x64_sys_call+0x2edb/0x3ba0 > arch/x86/include/generated/asm/syscalls_64.h:329 > do_syscall_x64 arch/x86/entry/common.c:52 [inline] > do_syscall_64+0xcd/0x1e0 arch/x86/entry/common.c:83 > entry_SYSCALL_64_after_hwframe+0x77/0x7f > > Uninit was stored to memory at: > memcpy_to_iter lib/iov_iter.c:65 [inline] > iterate_bvec include/linux/iov_iter.h:123 [inline] > iterate_and_advance2 include/linux/iov_iter.h:304 [inline] > iterate_and_advance include/linux/iov_iter.h:328 [inline] > _copy_to_iter+0xe53/0x2b30 lib/iov_iter.c:185 > copy_page_to_iter+0x419/0x880 lib/iov_iter.c:362 > shmem_file_read_iter+0xa09/0x12b0 mm/shmem.c:3167 > do_iter_readv_writev+0x88a/0xa30 > vfs_iter_read+0x278/0x760 fs/read_write.c:923 > lo_read_simple drivers/block/loop.c:283 [inline] > do_req_filebacked drivers/block/loop.c:516 [inline] > loop_handle_cmd drivers/block/loop.c:1910 [inline] > loop_process_work+0x20fc/0x3750 drivers/block/loop.c:1945 > loop_rootcg_workfn+0x2b/0x40 drivers/block/loop.c:1976 > process_one_work kernel/workqueue.c:3229 [inline] > process_scheduled_works+0xae0/0x1c40 kernel/workqueue.c:3310 > worker_thread+0xea7/0x14f0 kernel/workqueue.c:3391 > kthread+0x3e2/0x540 kernel/kthread.c:389 > ret_from_fork+0x6d/0x90 arch/x86/kernel/process.c:147 > ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 > > Uninit was stored to memory at: > memcpy_from_iter lib/iov_iter.c:73 [inline] > iterate_bvec include/linux/iov_iter.h:123 [inline] > iterate_and_advance2 include/linux/iov_iter.h:304 [inline] > iterate_and_advance include/linux/iov_iter.h:328 [inline] > __copy_from_iter lib/iov_iter.c:249 [inline] > copy_page_from_iter_atomic+0x12b7/0x3100 lib/iov_iter.c:481 > copy_folio_from_iter_atomic include/linux/uio.h:201 [inline] > generic_perform_write+0x8d1/0x1080 mm/filemap.c:4066 > shmem_file_write_iter+0x2ba/0x2f0 mm/shmem.c:3221 > do_iter_readv_writev+0x88a/0xa30 > vfs_iter_write+0x44d/0xd40 fs/read_write.c:988 > lo_write_bvec drivers/block/loop.c:243 [inline] > lo_write_simple drivers/block/loop.c:264 [inline] > do_req_filebacked drivers/block/loop.c:511 [inline] > loop_handle_cmd drivers/block/loop.c:1910 [inline] > loop_process_work+0x15e6/0x3750 drivers/block/loop.c:1945 > loop_rootcg_workfn+0x2b/0x40 drivers/block/loop.c:1976 > process_one_work kernel/workqueue.c:3229 [inline] > process_scheduled_works+0xae0/0x1c40 kernel/workqueue.c:3310 > worker_thread+0xea7/0x14f0 kernel/workqueue.c:3391 > kthread+0x3e2/0x540 kernel/kthread.c:389 > ret_from_fork+0x6d/0x90 arch/x86/kernel/process.c:147 > ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 > > Uninit was created at: > __alloc_pages_noprof+0x9d6/0xe70 mm/page_alloc.c:4756 > alloc_pages_mpol_noprof+0x299/0x990 mm/mempolicy.c:2265 > alloc_pages_noprof mm/mempolicy.c:2345 [inline] > folio_alloc_noprof+0x1db/0x310 mm/mempolicy.c:2352 > filemap_alloc_folio_noprof+0xa6/0x440 mm/filemap.c:1010 > __filemap_get_folio+0xac4/0x1550 mm/filemap.c:1952 > block_write_begin+0x6e/0x2b0 fs/buffer.c:2226 > exfat_write_begin+0xfb/0x400 fs/exfat/inode.c:434 > exfat_extend_valid_size fs/exfat/file.c:553 [inline] > exfat_file_write_iter+0x474/0xfb0 fs/exfat/file.c:588 > do_iter_readv_writev+0x88a/0xa30 > vfs_writev+0x56a/0x14f0 fs/read_write.c:1064 > do_pwritev fs/read_write.c:1165 [inline] > __do_sys_pwritev2 fs/read_write.c:1224 [inline] > __se_sys_pwritev2+0x280/0x470 fs/read_write.c:1215 > __x64_sys_pwritev2+0x11f/0x1a0 fs/read_write.c:1215 > x64_sys_call+0x2edb/0x3ba0 > arch/x86/include/generated/asm/syscalls_64.h:329 > do_syscall_x64 arch/x86/entry/common.c:52 [inline] > do_syscall_64+0xcd/0x1e0 arch/x86/entry/common.c:83 > entry_SYSCALL_64_after_hwframe+0x77/0x7f > > CPU: 0 UID: 0 PID: 5188 Comm: syz-executor221 Not tainted > 6.12.0-rc1-syzkaller-00031-ge32cde8d2bd7 #0 > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS > Google 09/13/2024 > ===================================================== > > > --- > This report is generated by a bot. It may contain errors. > See > https://urldefense.com/v3/__https://goo.gl/tpsmEJ__;!!JmoZiZGBv3RvKRSx!_E > FM31JxDI_sBC6NhWwWIWcja8UUVBXZYWyhK0O9vUuSsqy-ZOla4TuepNTA3X- > btBmzePMIOD0CGeGE0kSF4M2hOwVy57mr50hLBEHu$ for more information > about syzbot. > syzbot engineers can be reached at mailto:syzkaller@xxxxxxxxxxxxxxxx. > > syzbot will keep track of this issue. See: > https://urldefense.com/v3/__https://goo.gl/tpsmEJ*status__;Iw!!JmoZiZGBv3R > vKRSx!_EFM31JxDI_sBC6NhWwWIWcja8UUVBXZYWyhK0O9vUuSsqy-ZOla4Tu > epNTA3X-btBmzePMIOD0CGeGE0kSF4M2hOwVy57mr55Eybub8$ for how to > communicate with syzbot. > > If the report is already addressed, let syzbot know by replying with: > #syz fix: exact-commit-title > > If you want syzbot to run the reproducer, reply with: > #syz test: git://repo/address.git branch-or-commit-hash > If you attach or paste a git patch, syzbot will apply it before testing. > > If you want to overwrite report's subsystems, reply with: > #syz set subsystems: new-subsystem > (See the list of subsystem names on the web dashboard) > > If the report is a duplicate of another one, reply with: > #syz dup: exact-subject-of-another-report > > If you want to undo deduplication, reply with: > #syz undup
Attachment:
0001-exfat-check-alignment-before-extending-valid_size.patch
Description: 0001-exfat-check-alignment-before-extending-valid_size.patch
