[syzbot] [crypto?] KMSAN: uninit-value in lzo1x_1_do_compress (2)
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syzbot
Jan 14, 2024, 5:14:18 AMJan 14
to da...@davemloft.net, her...@gondor.apana.org.au, linux-...@vger.kernel.org, linux-...@vger.kernel.org, syzkall...@googlegroups.com
Hello,
syzbot found the following issue on:
HEAD commit: ac865f00af29 Merge tag 'pci-v6.7-fixes-2' of git://git.ker..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=12cc956ee80000
kernel config: https://syzkaller.appspot.com/x/.config?x=e51fe20c3e51ba7f
dashboard link: https://syzkaller.appspot.com/bug?extid=9a049ebdaacbb076e50a
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
userspace arch: i386
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/616ff65c4cd0/disk-ac865f00.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/4c25a3597c1c/vmlinux-ac865f00.xz
kernel image: https://storage.googleapis.com/syzbot-assets/db2a6f02e9fc/bzImage-ac865f00.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+9a049e...@syzkaller.appspotmail.com
=====================================================
BUG: KMSAN: uninit-value in lzo1x_1_do_compress+0x913/0x2510 lib/lzo/lzo1x_compress.c:107
lzo1x_1_do_compress+0x913/0x2510 lib/lzo/lzo1x_compress.c:107
lzogeneric1x_1_compress+0x26a/0x11a0 lib/lzo/lzo1x_compress.c:333
lzo1x_1_compress+0x47/0x70 lib/lzo/lzo1x_compress.c:383
__lzo_compress crypto/lzo.c:58 [inline]
lzo_scompress+0x98/0x180 crypto/lzo.c:79
scomp_acomp_comp_decomp+0x4b6/0x780
scomp_acomp_compress+0x32/0x40 crypto/scompress.c:159
crypto_acomp_compress include/crypto/acompress.h:302 [inline]
zswap_store+0x1b5c/0x32b0 mm/zswap.c:1314
swap_writepage+0x122/0x340 mm/page_io.c:198
shmem_writepage+0x1720/0x1e70 mm/shmem.c:1517
pageout mm/vmscan.c:654 [inline]
shrink_folio_list+0x508f/0x7760 mm/vmscan.c:1315
evict_folios+0x9bb1/0xbaa0 mm/vmscan.c:4499
try_to_shrink_lruvec+0x15ac/0x1b20 mm/vmscan.c:4704
shrink_one+0x66e/0xd70 mm/vmscan.c:4743
shrink_many mm/vmscan.c:4808 [inline]
lru_gen_shrink_node mm/vmscan.c:4923 [inline]
shrink_node+0x4bed/0x5890 mm/vmscan.c:5863
kswapd_shrink_node mm/vmscan.c:6668 [inline]
balance_pgdat mm/vmscan.c:6858 [inline]
kswapd+0x1df1/0x4260 mm/vmscan.c:7118
kthread+0x3ed/0x540 kernel/kthread.c:388
ret_from_fork+0x66/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242
<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:268 [inline]
copy_page_from_iter_atomic+0x12f1/0x2b70 lib/iov_iter.c:500
generic_perform_write+0x4ae/0xc40 mm/filemap.c:3935
shmem_file_write_iter+0x2b5/0x2e0 mm/shmem.c:2895
do_iter_write+0xceb/0x1340 fs/read_write.c:860
vfs_iter_write+0x8e/0xe0 fs/read_write.c:901
lo_write_bvec drivers/block/loop.c:249 [inline]
lo_write_simple drivers/block/loop.c:271 [inline]
do_req_filebacked drivers/block/loop.c:495 [inline]
loop_handle_cmd drivers/block/loop.c:1915 [inline]
loop_process_work+0x20c3/0x39d0 drivers/block/loop.c:1950
loop_rootcg_workfn+0x2b/0x30 drivers/block/loop.c:1981
process_one_work kernel/workqueue.c:2627 [inline]
process_scheduled_works+0x104e/0x1e70 kernel/workqueue.c:2700
worker_thread+0xf45/0x1490 kernel/workqueue.c:2781
kthread+0x3ed/0x540 kernel/kthread.c:388
ret_from_fork+0x66/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242
Uninit was stored to memory at:
ntfs_write_bh+0x64e/0xda0 fs/ntfs3/fsntfs.c:1425
indx_write fs/ntfs3/index.c:1027 [inline]
indx_update_dup+0xd7d/0xf80 fs/ntfs3/index.c:2687
ni_update_parent+0x12de/0x14a0 fs/ntfs3/frecord.c:3233
ni_write_inode+0x1c73/0x1d70 fs/ntfs3/frecord.c:3321
ntfs3_write_inode+0x94/0xb0 fs/ntfs3/inode.c:1029
write_inode fs/fs-writeback.c:1473 [inline]
__writeback_single_inode+0x843/0x12b0 fs/fs-writeback.c:1690
writeback_sb_inodes+0xb73/0x1c00 fs/fs-writeback.c:1916
wb_writeback+0x4a1/0xdf0 fs/fs-writeback.c:2092
wb_do_writeback fs/fs-writeback.c:2239 [inline]
wb_workfn+0x3a4/0x1710 fs/fs-writeback.c:2279
process_one_work kernel/workqueue.c:2627 [inline]
process_scheduled_works+0x104e/0x1e70 kernel/workqueue.c:2700
worker_thread+0xf45/0x1490 kernel/workqueue.c:2781
kthread+0x3ed/0x540 kernel/kthread.c:388
ret_from_fork+0x66/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242
Uninit was stored to memory at:
ntfs_read_run_nb+0x6d5/0xf60 fs/ntfs3/fsntfs.c:1227
ntfs_read_bh+0x64/0xde0 fs/ntfs3/fsntfs.c:1288
indx_read+0x44e/0x17b0 fs/ntfs3/index.c:1067
indx_find+0xd08/0x1430 fs/ntfs3/index.c:1181
indx_update_dup+0x607/0xf80 fs/ntfs3/index.c:2659
ni_update_parent+0x12de/0x14a0 fs/ntfs3/frecord.c:3233
ni_write_inode+0x1c73/0x1d70 fs/ntfs3/frecord.c:3321
ntfs3_write_inode+0x94/0xb0 fs/ntfs3/inode.c:1029
write_inode fs/fs-writeback.c:1473 [inline]
__writeback_single_inode+0x843/0x12b0 fs/fs-writeback.c:1690
writeback_sb_inodes+0xb73/0x1c00 fs/fs-writeback.c:1916
wb_writeback+0x4a1/0xdf0 fs/fs-writeback.c:2092
wb_do_writeback fs/fs-writeback.c:2239 [inline]
wb_workfn+0x3a4/0x1710 fs/fs-writeback.c:2279
process_one_work kernel/workqueue.c:2627 [inline]
process_scheduled_works+0x104e/0x1e70 kernel/workqueue.c:2700
worker_thread+0xf45/0x1490 kernel/workqueue.c:2781
kthread+0x3ed/0x540 kernel/kthread.c:388
ret_from_fork+0x66/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242
Uninit was stored to memory at:
ntfs_write_bh+0x64e/0xda0 fs/ntfs3/fsntfs.c:1425
indx_write fs/ntfs3/index.c:1027 [inline]
indx_insert_into_buffer+0xd8b/0x2000 fs/ntfs3/index.c:1804
indx_insert_entry+0xa3c/0xee0 fs/ntfs3/index.c:1981
ntfs_create_inode+0x4619/0x4fc0 fs/ntfs3/inode.c:1655
ntfs_symlink+0x88/0x110 fs/ntfs3/namei.c:202
vfs_symlink+0x1e6/0x3e0 fs/namei.c:4464
do_symlinkat+0x257/0x890 fs/namei.c:4490
__do_sys_symlinkat fs/namei.c:4506 [inline]
__se_sys_symlinkat fs/namei.c:4503 [inline]
__ia32_sys_symlinkat+0xf3/0x160 fs/namei.c:4503
do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline]
__do_fast_syscall_32+0xa2/0x100 arch/x86/entry/common.c:321
do_fast_syscall_32+0x37/0x70 arch/x86/entry/common.c:346
do_SYSENTER_32+0x1f/0x30 arch/x86/entry/common.c:384
entry_SYSENTER_compat_after_hwframe+0x70/0x7a
Uninit was stored to memory at:
ntfs_read_run_nb+0x6d5/0xf60 fs/ntfs3/fsntfs.c:1227
ntfs_read_bh+0x64/0xde0 fs/ntfs3/fsntfs.c:1288
indx_read+0x44e/0x17b0 fs/ntfs3/index.c:1067
indx_find+0xd08/0x1430 fs/ntfs3/index.c:1181
indx_insert_entry+0xadf/0xee0 fs/ntfs3/index.c:1958
ntfs_create_inode+0x4619/0x4fc0 fs/ntfs3/inode.c:1655
ntfs_symlink+0x88/0x110 fs/ntfs3/namei.c:202
vfs_symlink+0x1e6/0x3e0 fs/namei.c:4464
do_symlinkat+0x257/0x890 fs/namei.c:4490
__do_sys_symlinkat fs/namei.c:4506 [inline]
__se_sys_symlinkat fs/namei.c:4503 [inline]
__ia32_sys_symlinkat+0xf3/0x160 fs/namei.c:4503
do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline]
__do_fast_syscall_32+0xa2/0x100 arch/x86/entry/common.c:321
do_fast_syscall_32+0x37/0x70 arch/x86/entry/common.c:346
do_SYSENTER_32+0x1f/0x30 arch/x86/entry/common.c:384
entry_SYSENTER_compat_after_hwframe+0x70/0x7a
Uninit was stored to memory at:
ntfs_write_bh+0x64e/0xda0 fs/ntfs3/fsntfs.c:1425
indx_write fs/ntfs3/index.c:1027 [inline]
indx_insert_into_buffer+0xd8b/0x2000 fs/ntfs3/index.c:1804
indx_insert_entry+0xa3c/0xee0 fs/ntfs3/index.c:1981
ntfs_create_inode+0x4619/0x4fc0 fs/ntfs3/inode.c:1655
ntfs_mkdir+0x5c/0xe0 fs/ntfs3/namei.c:216
vfs_mkdir+0x49a/0x700 fs/namei.c:4106
do_mkdirat+0x529/0x800 fs/namei.c:4129
__do_sys_mkdirat fs/namei.c:4144 [inline]
__se_sys_mkdirat fs/namei.c:4142 [inline]
__ia32_sys_mkdirat+0xc8/0x120 fs/namei.c:4142
do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline]
__do_fast_syscall_32+0xa2/0x100 arch/x86/entry/common.c:321
do_fast_syscall_32+0x37/0x70 arch/x86/entry/common.c:346
do_SYSENTER_32+0x1f/0x30 arch/x86/entry/common.c:384
entry_SYSENTER_compat_after_hwframe+0x70/0x7a
Uninit was stored to memory at:
hdr_insert_de fs/ntfs3/index.c:838 [inline]
indx_insert_into_buffer+0xcdb/0x2000 fs/ntfs3/index.c:1800
indx_insert_entry+0xa3c/0xee0 fs/ntfs3/index.c:1981
ntfs_create_inode+0x4619/0x4fc0 fs/ntfs3/inode.c:1655
ntfs_mkdir+0x5c/0xe0 fs/ntfs3/namei.c:216
vfs_mkdir+0x49a/0x700 fs/namei.c:4106
do_mkdirat+0x529/0x800 fs/namei.c:4129
__do_sys_mkdirat fs/namei.c:4144 [inline]
__se_sys_mkdirat fs/namei.c:4142 [inline]
__ia32_sys_mkdirat+0xc8/0x120 fs/namei.c:4142
do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline]
__do_fast_syscall_32+0xa2/0x100 arch/x86/entry/common.c:321
do_fast_syscall_32+0x37/0x70 arch/x86/entry/common.c:346
do_SYSENTER_32+0x1f/0x30 arch/x86/entry/common.c:384
entry_SYSENTER_compat_after_hwframe+0x70/0x7a
Uninit was created at:
slab_post_alloc_hook+0x129/0xa70 mm/slab.h:768
slab_alloc_node mm/slub.c:3478 [inline]
slab_alloc mm/slub.c:3486 [inline]
__kmem_cache_alloc_lru mm/slub.c:3493 [inline]
kmem_cache_alloc+0x579/0xa90 mm/slub.c:3502
ntfs_create_inode+0x658/0x4fc0 fs/ntfs3/inode.c:1303
ntfs_mkdir+0x5c/0xe0 fs/ntfs3/namei.c:216
vfs_mkdir+0x49a/0x700 fs/namei.c:4106
do_mkdirat+0x529/0x800 fs/namei.c:4129
__do_sys_mkdirat fs/namei.c:4144 [inline]
__se_sys_mkdirat fs/namei.c:4142 [inline]
__ia32_sys_mkdirat+0xc8/0x120 fs/namei.c:4142
do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline]
__do_fast_syscall_32+0xa2/0x100 arch/x86/entry/common.c:321
do_fast_syscall_32+0x37/0x70 arch/x86/entry/common.c:346
do_SYSENTER_32+0x1f/0x30 arch/x86/entry/common.c:384
entry_SYSENTER_compat_after_hwframe+0x70/0x7a
CPU: 0 PID: 76 Comm: kswapd0 Not tainted 6.7.0-rc8-syzkaller-00024-gac865f00af29 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
=====================================================
---
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If the report is already addressed, let syzbot know by replying with:
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If you want to overwrite report's subsystems, reply with:
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(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
syzbot found the following issue on:
HEAD commit: ac865f00af29 Merge tag 'pci-v6.7-fixes-2' of git://git.ker..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=12cc956ee80000
kernel config: https://syzkaller.appspot.com/x/.config?x=e51fe20c3e51ba7f
dashboard link: https://syzkaller.appspot.com/bug?extid=9a049ebdaacbb076e50a
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
userspace arch: i386
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/616ff65c4cd0/disk-ac865f00.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/4c25a3597c1c/vmlinux-ac865f00.xz
kernel image: https://storage.googleapis.com/syzbot-assets/db2a6f02e9fc/bzImage-ac865f00.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+9a049e...@syzkaller.appspotmail.com
=====================================================
BUG: KMSAN: uninit-value in lzo1x_1_do_compress+0x913/0x2510 lib/lzo/lzo1x_compress.c:107
lzo1x_1_do_compress+0x913/0x2510 lib/lzo/lzo1x_compress.c:107
lzogeneric1x_1_compress+0x26a/0x11a0 lib/lzo/lzo1x_compress.c:333
lzo1x_1_compress+0x47/0x70 lib/lzo/lzo1x_compress.c:383
__lzo_compress crypto/lzo.c:58 [inline]
lzo_scompress+0x98/0x180 crypto/lzo.c:79
scomp_acomp_comp_decomp+0x4b6/0x780
scomp_acomp_compress+0x32/0x40 crypto/scompress.c:159
crypto_acomp_compress include/crypto/acompress.h:302 [inline]
zswap_store+0x1b5c/0x32b0 mm/zswap.c:1314
swap_writepage+0x122/0x340 mm/page_io.c:198
shmem_writepage+0x1720/0x1e70 mm/shmem.c:1517
pageout mm/vmscan.c:654 [inline]
shrink_folio_list+0x508f/0x7760 mm/vmscan.c:1315
evict_folios+0x9bb1/0xbaa0 mm/vmscan.c:4499
try_to_shrink_lruvec+0x15ac/0x1b20 mm/vmscan.c:4704
shrink_one+0x66e/0xd70 mm/vmscan.c:4743
shrink_many mm/vmscan.c:4808 [inline]
lru_gen_shrink_node mm/vmscan.c:4923 [inline]
shrink_node+0x4bed/0x5890 mm/vmscan.c:5863
kswapd_shrink_node mm/vmscan.c:6668 [inline]
balance_pgdat mm/vmscan.c:6858 [inline]
kswapd+0x1df1/0x4260 mm/vmscan.c:7118
kthread+0x3ed/0x540 kernel/kthread.c:388
ret_from_fork+0x66/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242
<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:268 [inline]
copy_page_from_iter_atomic+0x12f1/0x2b70 lib/iov_iter.c:500
generic_perform_write+0x4ae/0xc40 mm/filemap.c:3935
shmem_file_write_iter+0x2b5/0x2e0 mm/shmem.c:2895
do_iter_write+0xceb/0x1340 fs/read_write.c:860
vfs_iter_write+0x8e/0xe0 fs/read_write.c:901
lo_write_bvec drivers/block/loop.c:249 [inline]
lo_write_simple drivers/block/loop.c:271 [inline]
do_req_filebacked drivers/block/loop.c:495 [inline]
loop_handle_cmd drivers/block/loop.c:1915 [inline]
loop_process_work+0x20c3/0x39d0 drivers/block/loop.c:1950
loop_rootcg_workfn+0x2b/0x30 drivers/block/loop.c:1981
process_one_work kernel/workqueue.c:2627 [inline]
process_scheduled_works+0x104e/0x1e70 kernel/workqueue.c:2700
worker_thread+0xf45/0x1490 kernel/workqueue.c:2781
kthread+0x3ed/0x540 kernel/kthread.c:388
ret_from_fork+0x66/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242
Uninit was stored to memory at:
ntfs_write_bh+0x64e/0xda0 fs/ntfs3/fsntfs.c:1425
indx_write fs/ntfs3/index.c:1027 [inline]
indx_update_dup+0xd7d/0xf80 fs/ntfs3/index.c:2687
ni_update_parent+0x12de/0x14a0 fs/ntfs3/frecord.c:3233
ni_write_inode+0x1c73/0x1d70 fs/ntfs3/frecord.c:3321
ntfs3_write_inode+0x94/0xb0 fs/ntfs3/inode.c:1029
write_inode fs/fs-writeback.c:1473 [inline]
__writeback_single_inode+0x843/0x12b0 fs/fs-writeback.c:1690
writeback_sb_inodes+0xb73/0x1c00 fs/fs-writeback.c:1916
wb_writeback+0x4a1/0xdf0 fs/fs-writeback.c:2092
wb_do_writeback fs/fs-writeback.c:2239 [inline]
wb_workfn+0x3a4/0x1710 fs/fs-writeback.c:2279
process_one_work kernel/workqueue.c:2627 [inline]
process_scheduled_works+0x104e/0x1e70 kernel/workqueue.c:2700
worker_thread+0xf45/0x1490 kernel/workqueue.c:2781
kthread+0x3ed/0x540 kernel/kthread.c:388
ret_from_fork+0x66/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242
Uninit was stored to memory at:
ntfs_read_run_nb+0x6d5/0xf60 fs/ntfs3/fsntfs.c:1227
ntfs_read_bh+0x64/0xde0 fs/ntfs3/fsntfs.c:1288
indx_read+0x44e/0x17b0 fs/ntfs3/index.c:1067
indx_find+0xd08/0x1430 fs/ntfs3/index.c:1181
indx_update_dup+0x607/0xf80 fs/ntfs3/index.c:2659
ni_update_parent+0x12de/0x14a0 fs/ntfs3/frecord.c:3233
ni_write_inode+0x1c73/0x1d70 fs/ntfs3/frecord.c:3321
ntfs3_write_inode+0x94/0xb0 fs/ntfs3/inode.c:1029
write_inode fs/fs-writeback.c:1473 [inline]
__writeback_single_inode+0x843/0x12b0 fs/fs-writeback.c:1690
writeback_sb_inodes+0xb73/0x1c00 fs/fs-writeback.c:1916
wb_writeback+0x4a1/0xdf0 fs/fs-writeback.c:2092
wb_do_writeback fs/fs-writeback.c:2239 [inline]
wb_workfn+0x3a4/0x1710 fs/fs-writeback.c:2279
process_one_work kernel/workqueue.c:2627 [inline]
process_scheduled_works+0x104e/0x1e70 kernel/workqueue.c:2700
worker_thread+0xf45/0x1490 kernel/workqueue.c:2781
kthread+0x3ed/0x540 kernel/kthread.c:388
ret_from_fork+0x66/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242
Uninit was stored to memory at:
ntfs_write_bh+0x64e/0xda0 fs/ntfs3/fsntfs.c:1425
indx_write fs/ntfs3/index.c:1027 [inline]
indx_insert_into_buffer+0xd8b/0x2000 fs/ntfs3/index.c:1804
indx_insert_entry+0xa3c/0xee0 fs/ntfs3/index.c:1981
ntfs_create_inode+0x4619/0x4fc0 fs/ntfs3/inode.c:1655
ntfs_symlink+0x88/0x110 fs/ntfs3/namei.c:202
vfs_symlink+0x1e6/0x3e0 fs/namei.c:4464
do_symlinkat+0x257/0x890 fs/namei.c:4490
__do_sys_symlinkat fs/namei.c:4506 [inline]
__se_sys_symlinkat fs/namei.c:4503 [inline]
__ia32_sys_symlinkat+0xf3/0x160 fs/namei.c:4503
do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline]
__do_fast_syscall_32+0xa2/0x100 arch/x86/entry/common.c:321
do_fast_syscall_32+0x37/0x70 arch/x86/entry/common.c:346
do_SYSENTER_32+0x1f/0x30 arch/x86/entry/common.c:384
entry_SYSENTER_compat_after_hwframe+0x70/0x7a
Uninit was stored to memory at:
ntfs_read_run_nb+0x6d5/0xf60 fs/ntfs3/fsntfs.c:1227
ntfs_read_bh+0x64/0xde0 fs/ntfs3/fsntfs.c:1288
indx_read+0x44e/0x17b0 fs/ntfs3/index.c:1067
indx_find+0xd08/0x1430 fs/ntfs3/index.c:1181
indx_insert_entry+0xadf/0xee0 fs/ntfs3/index.c:1958
ntfs_create_inode+0x4619/0x4fc0 fs/ntfs3/inode.c:1655
ntfs_symlink+0x88/0x110 fs/ntfs3/namei.c:202
vfs_symlink+0x1e6/0x3e0 fs/namei.c:4464
do_symlinkat+0x257/0x890 fs/namei.c:4490
__do_sys_symlinkat fs/namei.c:4506 [inline]
__se_sys_symlinkat fs/namei.c:4503 [inline]
__ia32_sys_symlinkat+0xf3/0x160 fs/namei.c:4503
do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline]
__do_fast_syscall_32+0xa2/0x100 arch/x86/entry/common.c:321
do_fast_syscall_32+0x37/0x70 arch/x86/entry/common.c:346
do_SYSENTER_32+0x1f/0x30 arch/x86/entry/common.c:384
entry_SYSENTER_compat_after_hwframe+0x70/0x7a
Uninit was stored to memory at:
ntfs_write_bh+0x64e/0xda0 fs/ntfs3/fsntfs.c:1425
indx_write fs/ntfs3/index.c:1027 [inline]
indx_insert_into_buffer+0xd8b/0x2000 fs/ntfs3/index.c:1804
indx_insert_entry+0xa3c/0xee0 fs/ntfs3/index.c:1981
ntfs_create_inode+0x4619/0x4fc0 fs/ntfs3/inode.c:1655
ntfs_mkdir+0x5c/0xe0 fs/ntfs3/namei.c:216
vfs_mkdir+0x49a/0x700 fs/namei.c:4106
do_mkdirat+0x529/0x800 fs/namei.c:4129
__do_sys_mkdirat fs/namei.c:4144 [inline]
__se_sys_mkdirat fs/namei.c:4142 [inline]
__ia32_sys_mkdirat+0xc8/0x120 fs/namei.c:4142
do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline]
__do_fast_syscall_32+0xa2/0x100 arch/x86/entry/common.c:321
do_fast_syscall_32+0x37/0x70 arch/x86/entry/common.c:346
do_SYSENTER_32+0x1f/0x30 arch/x86/entry/common.c:384
entry_SYSENTER_compat_after_hwframe+0x70/0x7a
Uninit was stored to memory at:
hdr_insert_de fs/ntfs3/index.c:838 [inline]
indx_insert_into_buffer+0xcdb/0x2000 fs/ntfs3/index.c:1800
indx_insert_entry+0xa3c/0xee0 fs/ntfs3/index.c:1981
ntfs_create_inode+0x4619/0x4fc0 fs/ntfs3/inode.c:1655
ntfs_mkdir+0x5c/0xe0 fs/ntfs3/namei.c:216
vfs_mkdir+0x49a/0x700 fs/namei.c:4106
do_mkdirat+0x529/0x800 fs/namei.c:4129
__do_sys_mkdirat fs/namei.c:4144 [inline]
__se_sys_mkdirat fs/namei.c:4142 [inline]
__ia32_sys_mkdirat+0xc8/0x120 fs/namei.c:4142
do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline]
__do_fast_syscall_32+0xa2/0x100 arch/x86/entry/common.c:321
do_fast_syscall_32+0x37/0x70 arch/x86/entry/common.c:346
do_SYSENTER_32+0x1f/0x30 arch/x86/entry/common.c:384
entry_SYSENTER_compat_after_hwframe+0x70/0x7a
Uninit was created at:
slab_post_alloc_hook+0x129/0xa70 mm/slab.h:768
slab_alloc_node mm/slub.c:3478 [inline]
slab_alloc mm/slub.c:3486 [inline]
__kmem_cache_alloc_lru mm/slub.c:3493 [inline]
kmem_cache_alloc+0x579/0xa90 mm/slub.c:3502
ntfs_create_inode+0x658/0x4fc0 fs/ntfs3/inode.c:1303
ntfs_mkdir+0x5c/0xe0 fs/ntfs3/namei.c:216
vfs_mkdir+0x49a/0x700 fs/namei.c:4106
do_mkdirat+0x529/0x800 fs/namei.c:4129
__do_sys_mkdirat fs/namei.c:4144 [inline]
__se_sys_mkdirat fs/namei.c:4142 [inline]
__ia32_sys_mkdirat+0xc8/0x120 fs/namei.c:4142
do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline]
__do_fast_syscall_32+0xa2/0x100 arch/x86/entry/common.c:321
do_fast_syscall_32+0x37/0x70 arch/x86/entry/common.c:346
do_SYSENTER_32+0x1f/0x30 arch/x86/entry/common.c:384
entry_SYSENTER_compat_after_hwframe+0x70/0x7a
CPU: 0 PID: 76 Comm: kswapd0 Not tainted 6.7.0-rc8-syzkaller-00024-gac865f00af29 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
=====================================================
---
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 syzk...@googlegroups.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 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
syzbot
Apr 22, 2024, 1:59:19 AM (5 days ago) Apr 22
to da...@davemloft.net, her...@gondor.apana.org.au, linux-...@vger.kernel.org, linux-...@vger.kernel.org, syzkall...@googlegroups.com
syzbot has found a reproducer for the following issue on:
HEAD commit: 3b68086599f8 Merge tag 'sched_urgent_for_v6.9_rc5' of git:..
git tree: upstream
console+strace: https://syzkaller.appspot.com/x/log.txt?x=1717a99f180000
kernel config: https://syzkaller.appspot.com/x/.config?x=87a805e655619c64
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=173fe0fd180000
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/6a0c6d102762/disk-3b680865.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/02126711948e/vmlinux-3b680865.xz
kernel image: https://storage.googleapis.com/syzbot-assets/7d390469c033/bzImage-3b680865.xz
mounted in repro: https://storage.googleapis.com/syzbot-assets/4f2c52f00058/mount_0.gz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+9a049e...@syzkaller.appspotmail.com
=====================================================
BUG: KMSAN: uninit-value in lzo1x_1_do_compress+0x913/0x2510 lib/lzo/lzo1x_compress.c:107
lzo1x_1_do_compress+0x913/0x2510 lib/lzo/lzo1x_compress.c:107
lzogeneric1x_1_compress+0x26a/0x11b0 lib/lzo/lzo1x_compress.c:333
lzo1x_1_compress+0x47/0x80 lib/lzo/lzo1x_compress.c:383
scomp_acomp_compress+0x32/0x40 crypto/scompress.c:187
crypto_acomp_compress include/crypto/acompress.h:308 [inline]
zswap_compress+0x377/0xb10 mm/zswap.c:1040
zswap_store+0x2180/0x2ca0 mm/zswap.c:1573
swap_writepage+0x126/0x4c0 mm/page_io.c:198
shmem_writepage+0x1826/0x1f70 mm/shmem.c:1518
pageout mm/vmscan.c:660 [inline]
shrink_folio_list+0x4a55/0x7910 mm/vmscan.c:1323
evict_folios+0x9d7f/0xcc20 mm/vmscan.c:4537
try_to_shrink_lruvec+0x160e/0x1a50 mm/vmscan.c:4733
shrink_one+0x66f/0xd40 mm/vmscan.c:4772
shrink_many mm/vmscan.c:4835 [inline]
lru_gen_shrink_node mm/vmscan.c:4935 [inline]
shrink_node+0x4856/0x55f0 mm/vmscan.c:5894
kswapd_shrink_node mm/vmscan.c:6704 [inline]
balance_pgdat mm/vmscan.c:6895 [inline]
kswapd+0x1eba/0x4460 mm/vmscan.c:7164
kthread+0x3e2/0x540 kernel/kthread.c:388
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: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+0x12b7/0x2b60 lib/iov_iter.c:481
generic_perform_write+0x4c1/0xc60 mm/filemap.c:3982
shmem_file_write_iter+0x2bd/0x2f0 mm/shmem.c:2920
do_iter_readv_writev+0x7e6/0x960
vfs_iter_write+0x459/0xd00 fs/read_write.c:895
lo_write_bvec drivers/block/loop.c:246 [inline]
lo_write_simple drivers/block/loop.c:267 [inline]
do_req_filebacked drivers/block/loop.c:491 [inline]
loop_handle_cmd drivers/block/loop.c:1907 [inline]
loop_process_work+0x1502/0x3440 drivers/block/loop.c:1942
loop_rootcg_workfn+0x2b/0x40 drivers/block/loop.c:1973
process_one_work kernel/workqueue.c:3254 [inline]
process_scheduled_works+0xa81/0x1bd0 kernel/workqueue.c:3335
worker_thread+0xea5/0x1560 kernel/workqueue.c:3416
kthread+0x3e2/0x540 kernel/kthread.c:388
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_root+0x36f4/0x37d0 fs/ntfs3/index.c:1761
indx_insert_entry+0xe1d/0xee0 fs/ntfs3/index.c:1975
ntfs_create_inode+0x49b6/0x5100 fs/ntfs3/inode.c:1671
ntfs_atomic_open+0x90a/0xbb0 fs/ntfs3/namei.c:434
atomic_open fs/namei.c:3360 [inline]
lookup_open fs/namei.c:3468 [inline]
open_last_lookups fs/namei.c:3566 [inline]
path_openat+0x2230/0x5b00 fs/namei.c:3796
do_filp_open+0x20e/0x590 fs/namei.c:3826
do_sys_openat2+0x1bf/0x2f0 fs/open.c:1406
do_sys_open fs/open.c:1421 [inline]
__do_sys_creat fs/open.c:1497 [inline]
__se_sys_creat fs/open.c:1491 [inline]
__x64_sys_creat+0xe6/0x140 fs/open.c:1491
x64_sys_call+0x2966/0x3b50 arch/x86/include/generated/asm/syscalls_64.h:86
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcf/0x1e0 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Uninit was stored to memory at:
hdr_insert_de+0x3d4/0x3f0 fs/ntfs3/index.c:838
indx_insert_into_root+0x33f6/0x37d0 fs/ntfs3/index.c:1753
indx_insert_entry+0xe1d/0xee0 fs/ntfs3/index.c:1975
ntfs_create_inode+0x49b6/0x5100 fs/ntfs3/inode.c:1671
ntfs_atomic_open+0x90a/0xbb0 fs/ntfs3/namei.c:434
atomic_open fs/namei.c:3360 [inline]
lookup_open fs/namei.c:3468 [inline]
open_last_lookups fs/namei.c:3566 [inline]
path_openat+0x2230/0x5b00 fs/namei.c:3796
do_filp_open+0x20e/0x590 fs/namei.c:3826
do_sys_openat2+0x1bf/0x2f0 fs/open.c:1406
do_sys_open fs/open.c:1421 [inline]
__do_sys_creat fs/open.c:1497 [inline]
__se_sys_creat fs/open.c:1491 [inline]
__x64_sys_creat+0xe6/0x140 fs/open.c:1491
x64_sys_call+0x2966/0x3b50 arch/x86/include/generated/asm/syscalls_64.h:86
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcf/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:3804 [inline]
slab_alloc_node mm/slub.c:3845 [inline]
kmem_cache_alloc+0x5b6/0xbe0 mm/slub.c:3852
ntfs_create_inode+0x5e0/0x5100 fs/ntfs3/inode.c:1314
ntfs_atomic_open+0x90a/0xbb0 fs/ntfs3/namei.c:434
atomic_open fs/namei.c:3360 [inline]
lookup_open fs/namei.c:3468 [inline]
open_last_lookups fs/namei.c:3566 [inline]
path_openat+0x2230/0x5b00 fs/namei.c:3796
do_filp_open+0x20e/0x590 fs/namei.c:3826
do_sys_openat2+0x1bf/0x2f0 fs/open.c:1406
do_sys_open fs/open.c:1421 [inline]
__do_sys_creat fs/open.c:1497 [inline]
__se_sys_creat fs/open.c:1491 [inline]
__x64_sys_creat+0xe6/0x140 fs/open.c:1491
x64_sys_call+0x2966/0x3b50 arch/x86/include/generated/asm/syscalls_64.h:86
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcf/0x1e0 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
CPU: 0 PID: 80 Comm: kswapd0 Not tainted 6.9.0-rc4-syzkaller-00274-g3b68086599f8 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
=====================================================
---
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.
HEAD commit: 3b68086599f8 Merge tag 'sched_urgent_for_v6.9_rc5' of git:..
git tree: upstream
console+strace: https://syzkaller.appspot.com/x/log.txt?x=1717a99f180000
kernel config: https://syzkaller.appspot.com/x/.config?x=87a805e655619c64
dashboard link: https://syzkaller.appspot.com/bug?extid=9a049ebdaacbb076e50a
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=1293271b180000
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=173fe0fd180000
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/6a0c6d102762/disk-3b680865.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/02126711948e/vmlinux-3b680865.xz
kernel image: https://storage.googleapis.com/syzbot-assets/7d390469c033/bzImage-3b680865.xz
mounted in repro: https://storage.googleapis.com/syzbot-assets/4f2c52f00058/mount_0.gz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+9a049e...@syzkaller.appspotmail.com
=====================================================
BUG: KMSAN: uninit-value in lzo1x_1_do_compress+0x913/0x2510 lib/lzo/lzo1x_compress.c:107
lzo1x_1_do_compress+0x913/0x2510 lib/lzo/lzo1x_compress.c:107
lzo1x_1_compress+0x47/0x80 lib/lzo/lzo1x_compress.c:383
__lzo_compress crypto/lzo.c:58 [inline]
lzo_scompress+0x98/0x180 crypto/lzo.c:79
scomp_acomp_comp_decomp+0x7c6/0xb90
lzo_scompress+0x98/0x180 crypto/lzo.c:79
scomp_acomp_compress+0x32/0x40 crypto/scompress.c:187
crypto_acomp_compress include/crypto/acompress.h:308 [inline]
zswap_compress+0x377/0xb10 mm/zswap.c:1040
zswap_store+0x2180/0x2ca0 mm/zswap.c:1573
swap_writepage+0x126/0x4c0 mm/page_io.c:198
shmem_writepage+0x1826/0x1f70 mm/shmem.c:1518
pageout mm/vmscan.c:660 [inline]
shrink_folio_list+0x4a55/0x7910 mm/vmscan.c:1323
evict_folios+0x9d7f/0xcc20 mm/vmscan.c:4537
try_to_shrink_lruvec+0x160e/0x1a50 mm/vmscan.c:4733
shrink_one+0x66f/0xd40 mm/vmscan.c:4772
shrink_many mm/vmscan.c:4835 [inline]
lru_gen_shrink_node mm/vmscan.c:4935 [inline]
shrink_node+0x4856/0x55f0 mm/vmscan.c:5894
kswapd_shrink_node mm/vmscan.c:6704 [inline]
balance_pgdat mm/vmscan.c:6895 [inline]
kswapd+0x1eba/0x4460 mm/vmscan.c:7164
kthread+0x3e2/0x540 kernel/kthread.c:388
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:122 [inline]
iterate_and_advance2 include/linux/iov_iter.h:249 [inline]
iterate_and_advance include/linux/iov_iter.h:271 [inline]
copy_page_from_iter_atomic+0x12b7/0x2b60 lib/iov_iter.c:481
generic_perform_write+0x4c1/0xc60 mm/filemap.c:3982
shmem_file_write_iter+0x2bd/0x2f0 mm/shmem.c:2920
do_iter_readv_writev+0x7e6/0x960
vfs_iter_write+0x459/0xd00 fs/read_write.c:895
lo_write_bvec drivers/block/loop.c:246 [inline]
lo_write_simple drivers/block/loop.c:267 [inline]
do_req_filebacked drivers/block/loop.c:491 [inline]
loop_handle_cmd drivers/block/loop.c:1907 [inline]
loop_process_work+0x1502/0x3440 drivers/block/loop.c:1942
loop_rootcg_workfn+0x2b/0x40 drivers/block/loop.c:1973
process_one_work kernel/workqueue.c:3254 [inline]
process_scheduled_works+0xa81/0x1bd0 kernel/workqueue.c:3335
worker_thread+0xea5/0x1560 kernel/workqueue.c:3416
kthread+0x3e2/0x540 kernel/kthread.c:388
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:
indx_write fs/ntfs3/index.c:1027 [inline]
indx_insert_into_root+0x36f4/0x37d0 fs/ntfs3/index.c:1761
indx_insert_entry+0xe1d/0xee0 fs/ntfs3/index.c:1975
ntfs_create_inode+0x49b6/0x5100 fs/ntfs3/inode.c:1671
ntfs_atomic_open+0x90a/0xbb0 fs/ntfs3/namei.c:434
atomic_open fs/namei.c:3360 [inline]
lookup_open fs/namei.c:3468 [inline]
open_last_lookups fs/namei.c:3566 [inline]
path_openat+0x2230/0x5b00 fs/namei.c:3796
do_filp_open+0x20e/0x590 fs/namei.c:3826
do_sys_openat2+0x1bf/0x2f0 fs/open.c:1406
do_sys_open fs/open.c:1421 [inline]
__do_sys_creat fs/open.c:1497 [inline]
__se_sys_creat fs/open.c:1491 [inline]
__x64_sys_creat+0xe6/0x140 fs/open.c:1491
x64_sys_call+0x2966/0x3b50 arch/x86/include/generated/asm/syscalls_64.h:86
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcf/0x1e0 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Uninit was stored to memory at:
indx_insert_into_root+0x33f6/0x37d0 fs/ntfs3/index.c:1753
indx_insert_entry+0xe1d/0xee0 fs/ntfs3/index.c:1975
ntfs_create_inode+0x49b6/0x5100 fs/ntfs3/inode.c:1671
ntfs_atomic_open+0x90a/0xbb0 fs/ntfs3/namei.c:434
atomic_open fs/namei.c:3360 [inline]
lookup_open fs/namei.c:3468 [inline]
open_last_lookups fs/namei.c:3566 [inline]
path_openat+0x2230/0x5b00 fs/namei.c:3796
do_filp_open+0x20e/0x590 fs/namei.c:3826
do_sys_openat2+0x1bf/0x2f0 fs/open.c:1406
do_sys_open fs/open.c:1421 [inline]
__do_sys_creat fs/open.c:1497 [inline]
__se_sys_creat fs/open.c:1491 [inline]
__x64_sys_creat+0xe6/0x140 fs/open.c:1491
x64_sys_call+0x2966/0x3b50 arch/x86/include/generated/asm/syscalls_64.h:86
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcf/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:3804 [inline]
slab_alloc_node mm/slub.c:3845 [inline]
kmem_cache_alloc+0x5b6/0xbe0 mm/slub.c:3852
ntfs_create_inode+0x5e0/0x5100 fs/ntfs3/inode.c:1314
ntfs_atomic_open+0x90a/0xbb0 fs/ntfs3/namei.c:434
atomic_open fs/namei.c:3360 [inline]
lookup_open fs/namei.c:3468 [inline]
open_last_lookups fs/namei.c:3566 [inline]
path_openat+0x2230/0x5b00 fs/namei.c:3796
do_filp_open+0x20e/0x590 fs/namei.c:3826
do_sys_openat2+0x1bf/0x2f0 fs/open.c:1406
do_sys_open fs/open.c:1421 [inline]
__do_sys_creat fs/open.c:1497 [inline]
__se_sys_creat fs/open.c:1491 [inline]
__x64_sys_creat+0xe6/0x140 fs/open.c:1491
x64_sys_call+0x2966/0x3b50 arch/x86/include/generated/asm/syscalls_64.h:86
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcf/0x1e0 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
CPU: 0 PID: 80 Comm: kswapd0 Not tainted 6.9.0-rc4-syzkaller-00274-g3b68086599f8 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
=====================================================
---
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