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Message-ID: <00000000000097e14f0621951335@google.com> Date: Sat, 07 Sep 2024 22:40:22 -0700 From: syzbot <syzbot+17cae3c0a5b0acdc327d@...kaller.appspotmail.com> To: almaz.alexandrovich@...agon-software.com, davem@...emloft.net, haren@...ibm.com, herbert@...dor.apana.org.au, linux-crypto@...r.kernel.org, linux-kernel@...r.kernel.org, ntfs3@...ts.linux.dev, syzkaller-bugs@...glegroups.com Subject: [syzbot] [crypto?] [ntfs3?] KMSAN: uninit-value in sw842_compress Hello, syzbot found the following issue on: HEAD commit: 88fac17500f4 Merge tag 'fuse-fixes-6.11-rc7' of git://git... git tree: upstream console+strace: https://syzkaller.appspot.com/x/log.txt?x=14d165b7980000 kernel config: https://syzkaller.appspot.com/x/.config?x=35c699864e165c51 dashboard link: https://syzkaller.appspot.com/bug?extid=17cae3c0a5b0acdc327d compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=156a4e8f980000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=13a2c309980000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/6e5a9ba13ba0/disk-88fac175.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/229238ec073e/vmlinux-88fac175.xz kernel image: https://storage.googleapis.com/syzbot-assets/64327bdcda24/bzImage-88fac175.xz mounted in repro: https://storage.googleapis.com/syzbot-assets/e120b354c45a/mount_0.gz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+17cae3c0a5b0acdc327d@...kaller.appspotmail.com ===================================================== BUG: KMSAN: uninit-value in check_template lib/842/842_compress.c:391 [inline] BUG: KMSAN: uninit-value in process_next lib/842/842_compress.c:456 [inline] BUG: KMSAN: uninit-value in sw842_compress+0x15eb/0x5990 lib/842/842_compress.c:543 check_template lib/842/842_compress.c:391 [inline] process_next lib/842/842_compress.c:456 [inline] sw842_compress+0x15eb/0x5990 lib/842/842_compress.c:543 crypto842_scompress+0x4f/0x70 crypto/842.c:78 scomp_acomp_comp_decomp+0x7c6/0xb90 scomp_acomp_compress+0x32/0x40 crypto/scompress.c:187 crypto_acomp_compress include/crypto/acompress.h:251 [inline] zswap_compress+0x368/0xad0 mm/zswap.c:927 zswap_store+0x1af3/0x2dd0 mm/zswap.c:1459 swap_writepage+0x11f/0x470 mm/page_io.c:198 shmem_writepage+0x1a75/0x1f70 mm/shmem.c:1536 pageout mm/vmscan.c:680 [inline] shrink_folio_list+0x577f/0x7cb0 mm/vmscan.c:1360 evict_folios+0x9bce/0xbc80 mm/vmscan.c:4580 try_to_shrink_lruvec+0x13a3/0x1750 mm/vmscan.c:4775 shrink_one+0x646/0xd20 mm/vmscan.c:4813 shrink_many mm/vmscan.c:4876 [inline] lru_gen_shrink_node mm/vmscan.c:4954 [inline] shrink_node+0x451a/0x50f0 mm/vmscan.c:5934 kswapd_shrink_node mm/vmscan.c:6762 [inline] balance_pgdat mm/vmscan.c:6954 [inline] kswapd+0x2627/0x4350 mm/vmscan.c:7223 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 <Zero or more stacks not recorded to save memory> Uninit was stored to memory at: memcpy_from_iter lib/iov_iter.c:73 [inline] iterate_bvec include/linux/iov_iter.h:122 [inline] iterate_and_advance2 include/linux/iov_iter.h:249 [inline] iterate_and_advance include/linux/iov_iter.h:271 [inline] __copy_from_iter lib/iov_iter.c:249 [inline] copy_page_from_iter_atomic+0x12bb/0x2ae0 lib/iov_iter.c:481 copy_folio_from_iter_atomic include/linux/uio.h:186 [inline] generic_perform_write+0x896/0x12e0 mm/filemap.c:4032 shmem_file_write_iter+0x2bd/0x2f0 mm/shmem.c:3074 do_iter_readv_writev+0x8a1/0xa40 vfs_iter_write+0x459/0xd50 fs/read_write.c:895 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+0x15ec/0x3750 drivers/block/loop.c:1945 loop_rootcg_workfn+0x2b/0x40 drivers/block/loop.c:1976 process_one_work kernel/workqueue.c:3231 [inline] process_scheduled_works+0xae0/0x1c40 kernel/workqueue.c:3312 worker_thread+0xea7/0x14d0 kernel/workqueue.c:3389 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: ntfs_write_bh+0x652/0xdb0 fs/ntfs3/fsntfs.c:1450 indx_write fs/ntfs3/index.c:1027 [inline] indx_update_dup+0xd81/0xf80 fs/ntfs3/index.c:2694 ni_update_parent+0x12de/0x14b0 fs/ntfs3/frecord.c:3301 ni_write_inode+0x1cf4/0x1de0 fs/ntfs3/frecord.c:3392 ntfs3_write_inode+0x94/0xb0 fs/ntfs3/inode.c:1052 write_inode fs/fs-writeback.c:1497 [inline] __writeback_single_inode+0x849/0x12c0 fs/fs-writeback.c:1716 writeback_sb_inodes+0xc95/0x1e00 fs/fs-writeback.c:1947 __writeback_inodes_wb+0x14c/0x440 fs/fs-writeback.c:2018 wb_writeback+0x50b/0xea0 fs/fs-writeback.c:2129 wb_check_background_flush fs/fs-writeback.c:2199 [inline] wb_do_writeback fs/fs-writeback.c:2287 [inline] wb_workfn+0x122c/0x1940 fs/fs-writeback.c:2314 process_one_work kernel/workqueue.c:3231 [inline] process_scheduled_works+0xae0/0x1c40 kernel/workqueue.c:3312 worker_thread+0xea7/0x14d0 kernel/workqueue.c:3389 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: ntfs_read_run_nb+0x786/0x1070 fs/ntfs3/fsntfs.c:1252 ntfs_read_bh+0x64/0xde0 fs/ntfs3/fsntfs.c:1313 indx_read+0x44e/0x17b0 fs/ntfs3/index.c:1067 indx_find+0xd12/0x1440 fs/ntfs3/index.c:1181 indx_update_dup+0x607/0xf80 fs/ntfs3/index.c:2666 ni_update_parent+0x12de/0x14b0 fs/ntfs3/frecord.c:3301 ni_write_inode+0x1cf4/0x1de0 fs/ntfs3/frecord.c:3392 ntfs3_write_inode+0x94/0xb0 fs/ntfs3/inode.c:1052 write_inode fs/fs-writeback.c:1497 [inline] __writeback_single_inode+0x849/0x12c0 fs/fs-writeback.c:1716 writeback_sb_inodes+0xc95/0x1e00 fs/fs-writeback.c:1947 __writeback_inodes_wb+0x14c/0x440 fs/fs-writeback.c:2018 wb_writeback+0x50b/0xea0 fs/fs-writeback.c:2129 wb_check_background_flush fs/fs-writeback.c:2199 [inline] wb_do_writeback fs/fs-writeback.c:2287 [inline] wb_workfn+0x122c/0x1940 fs/fs-writeback.c:2314 process_one_work kernel/workqueue.c:3231 [inline] process_scheduled_works+0xae0/0x1c40 kernel/workqueue.c:3312 worker_thread+0xea7/0x14d0 kernel/workqueue.c:3389 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: ntfs_write_bh+0x652/0xdb0 fs/ntfs3/fsntfs.c:1450 indx_write fs/ntfs3/index.c:1027 [inline] indx_update_dup+0xd81/0xf80 fs/ntfs3/index.c:2694 ni_update_parent+0x12de/0x14b0 fs/ntfs3/frecord.c:3301 ni_write_inode+0x1cf4/0x1de0 fs/ntfs3/frecord.c:3392 ntfs3_write_inode+0x94/0xb0 fs/ntfs3/inode.c:1052 write_inode fs/fs-writeback.c:1497 [inline] __writeback_single_inode+0x849/0x12c0 fs/fs-writeback.c:1716 writeback_sb_inodes+0xc95/0x1e00 fs/fs-writeback.c:1947 __writeback_inodes_wb+0x14c/0x440 fs/fs-writeback.c:2018 wb_writeback+0x50b/0xea0 fs/fs-writeback.c:2129 wb_check_background_flush fs/fs-writeback.c:2199 [inline] wb_do_writeback fs/fs-writeback.c:2287 [inline] wb_workfn+0x122c/0x1940 fs/fs-writeback.c:2314 process_one_work kernel/workqueue.c:3231 [inline] process_scheduled_works+0xae0/0x1c40 kernel/workqueue.c:3312 worker_thread+0xea7/0x14d0 kernel/workqueue.c:3389 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: ntfs_read_run_nb+0x786/0x1070 fs/ntfs3/fsntfs.c:1252 ntfs_read_bh+0x64/0xde0 fs/ntfs3/fsntfs.c:1313 indx_read+0x44e/0x17b0 fs/ntfs3/index.c:1067 indx_find+0xd12/0x1440 fs/ntfs3/index.c:1181 indx_update_dup+0x607/0xf80 fs/ntfs3/index.c:2666 ni_update_parent+0x12de/0x14b0 fs/ntfs3/frecord.c:3301 ni_write_inode+0x1cf4/0x1de0 fs/ntfs3/frecord.c:3392 ntfs3_write_inode+0x94/0xb0 fs/ntfs3/inode.c:1052 write_inode fs/fs-writeback.c:1497 [inline] __writeback_single_inode+0x849/0x12c0 fs/fs-writeback.c:1716 writeback_sb_inodes+0xc95/0x1e00 fs/fs-writeback.c:1947 __writeback_inodes_wb+0x14c/0x440 fs/fs-writeback.c:2018 wb_writeback+0x50b/0xea0 fs/fs-writeback.c:2129 wb_check_background_flush fs/fs-writeback.c:2199 [inline] wb_do_writeback fs/fs-writeback.c:2287 [inline] wb_workfn+0x122c/0x1940 fs/fs-writeback.c:2314 process_one_work kernel/workqueue.c:3231 [inline] process_scheduled_works+0xae0/0x1c40 kernel/workqueue.c:3312 worker_thread+0xea7/0x14d0 kernel/workqueue.c:3389 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: ntfs_write_bh+0x652/0xdb0 fs/ntfs3/fsntfs.c:1450 indx_write fs/ntfs3/index.c:1027 [inline] indx_insert_into_buffer+0xd8f/0x2010 fs/ntfs3/index.c:1811 indx_insert_entry+0xa3c/0xee0 fs/ntfs3/index.c:1988 ni_add_name+0xe5d/0x10d0 fs/ntfs3/frecord.c:3123 ntfs_link_inode+0x265/0x310 fs/ntfs3/inode.c:1768 ntfs_link+0x21d/0x500 fs/ntfs3/namei.c:146 vfs_link+0x93d/0xb70 fs/namei.c:4692 do_linkat+0x4f5/0xfd0 fs/namei.c:4762 __do_sys_link fs/namei.c:4796 [inline] __se_sys_link fs/namei.c:4794 [inline] __x64_sys_link+0xe8/0x140 fs/namei.c:4794 x64_sys_call+0x2853/0x3ba0 arch/x86/include/generated/asm/syscalls_64.h:87 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: hdr_insert_de fs/ntfs3/index.c:838 [inline] indx_insert_into_buffer+0xcdf/0x2010 fs/ntfs3/index.c:1807 indx_insert_entry+0xa3c/0xee0 fs/ntfs3/index.c:1988 ni_add_name+0xe5d/0x10d0 fs/ntfs3/frecord.c:3123 ntfs_link_inode+0x265/0x310 fs/ntfs3/inode.c:1768 ntfs_link+0x21d/0x500 fs/ntfs3/namei.c:146 vfs_link+0x93d/0xb70 fs/namei.c:4692 do_linkat+0x4f5/0xfd0 fs/namei.c:4762 __do_sys_link fs/namei.c:4796 [inline] __se_sys_link fs/namei.c:4794 [inline] __x64_sys_link+0xe8/0x140 fs/namei.c:4794 x64_sys_call+0x2853/0x3ba0 arch/x86/include/generated/asm/syscalls_64.h:87 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 created at: slab_post_alloc_hook mm/slub.c:3994 [inline] slab_alloc_node mm/slub.c:4037 [inline] kmem_cache_alloc_noprof+0x637/0xb20 mm/slub.c:4044 ntfs_link_inode+0x8f/0x310 fs/ntfs3/inode.c:1756 ntfs_link+0x21d/0x500 fs/ntfs3/namei.c:146 vfs_link+0x93d/0xb70 fs/namei.c:4692 do_linkat+0x4f5/0xfd0 fs/namei.c:4762 __do_sys_link fs/namei.c:4796 [inline] __se_sys_link fs/namei.c:4794 [inline] __x64_sys_link+0xe8/0x140 fs/namei.c:4794 x64_sys_call+0x2853/0x3ba0 arch/x86/include/generated/asm/syscalls_64.h:87 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: 1 UID: 0 PID: 83 Comm: kswapd0 Not tainted 6.11.0-rc6-syzkaller-00026-g88fac17500f4 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024 ===================================================== --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@...glegroups.com. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status 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
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