Hello, syzbot found the following issue on: HEAD commit: 5be63fc19fca Linux 6.11-rc5 git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=17d06825980000 kernel config: https://syzkaller.appspot.com/x/.config?x=522060455c43d52e dashboard link: https://syzkaller.appspot.com/bug?extid=02341e0daa42a15ce130 compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/4b3d7926efea/disk-5be63fc1.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/2e5cbee87f73/vmlinux-5be63fc1.xz kernel image: https://storage.googleapis.com/syzbot-assets/fa58f9a69ae7/bzImage-5be63fc1.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+02341e0daa42a15ce130@xxxxxxxxxxxxxxxxxxxxxxxxx ===================================================== BUG: KMSAN: uninit-value in lzo1x_1_do_compress+0x19f9/0x2510 lib/lzo/lzo1x_compress.c:178 lzo1x_1_do_compress+0x19f9/0x2510 lib/lzo/lzo1x_compress.c:178 lzogeneric1x_1_compress+0x26a/0x11b0 lib/lzo/lzo1x_compress.c:333 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 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+0x257e/0x4290 mm/vmscan.c:7223 kthread+0x3dd/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: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+0x3dd/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: copy_to_dinode+0x881/0xb30 fs/jfs/jfs_imap.c:3158 diWrite+0x1bf5/0x1f00 fs/jfs/jfs_imap.c:790 txCommit+0xdb8/0x8cd0 fs/jfs/jfs_txnmgr.c:1255 __jfs_xattr_set+0x1b7/0x1f0 fs/jfs/xattr.c:936 jfs_xattr_set+0x79/0x90 fs/jfs/xattr.c:958 __vfs_setxattr+0x844/0x8b0 fs/xattr.c:200 __vfs_setxattr_noperm+0x22f/0xb00 fs/xattr.c:234 __vfs_setxattr_locked+0x441/0x480 fs/xattr.c:295 vfs_setxattr+0x294/0x650 fs/xattr.c:321 do_setxattr fs/xattr.c:629 [inline] __do_sys_fsetxattr fs/xattr.c:710 [inline] __se_sys_fsetxattr+0x7f0/0x980 fs/xattr.c:686 __x64_sys_fsetxattr+0xe4/0x150 fs/xattr.c:686 x64_sys_call+0x19c3/0x3ba0 arch/x86/include/generated/asm/syscalls_64.h:191 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: ea_put fs/jfs/xattr.c:639 [inline] __jfs_setxattr+0x185f/0x1ae0 fs/jfs/xattr.c:785 __jfs_xattr_set+0xe6/0x1f0 fs/jfs/xattr.c:934 jfs_xattr_set+0x79/0x90 fs/jfs/xattr.c:958 __vfs_setxattr+0x844/0x8b0 fs/xattr.c:200 __vfs_setxattr_noperm+0x22f/0xb00 fs/xattr.c:234 __vfs_setxattr_locked+0x441/0x480 fs/xattr.c:295 vfs_setxattr+0x294/0x650 fs/xattr.c:321 do_setxattr fs/xattr.c:629 [inline] __do_sys_fsetxattr fs/xattr.c:710 [inline] __se_sys_fsetxattr+0x7f0/0x980 fs/xattr.c:686 __x64_sys_fsetxattr+0xe4/0x150 fs/xattr.c:686 x64_sys_call+0x19c3/0x3ba0 arch/x86/include/generated/asm/syscalls_64.h:191 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 Local variable ea_buf created at: __jfs_setxattr+0x5d/0x1ae0 fs/jfs/xattr.c:662 __jfs_xattr_set+0xe6/0x1f0 fs/jfs/xattr.c:934 CPU: 0 UID: 0 PID: 81 Comm: kswapd0 Tainted: G W 6.11.0-rc5-syzkaller #0 Tainted: [W]=WARN 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@xxxxxxxxxxxxxxxx. 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
