[syzbot] [crypto?] [ntfs3?] KMSAN: uninit-value in sw842_compress
From: syzbot
Date: Sun Sep 08 2024 - 01:40:35 EST
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@xxxxxxxxxxxxxxxxxxxxxxxxx
=====================================================
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
=====================================================
---
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