===================================================== BUG: KMSAN: uninit-value in process_next lib/842/842_compress.c:456 [inline] BUG: KMSAN: uninit-value in sw842_compress+0x1767/0x5990 lib/842/842_compress.c:543 process_next lib/842/842_compress.c:456 [inline] sw842_compress+0x1767/0x5990 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 mm/zswap.c:918 [inline] zswap_store+0x1cea/0x3650 mm/zswap.c:1460 swap_writepage+0xa67/0x17f0 mm/page_io.c:279 shmem_writepage+0x2117/0x2450 mm/shmem.c:1572 pageout mm/vmscan.c:689 [inline] shrink_folio_list+0x5e7f/0x7dd0 mm/vmscan.c:1367 evict_folios+0x9813/0xbaf0 mm/vmscan.c:4589 try_to_shrink_lruvec+0x13a3/0x1750 mm/vmscan.c:4784 shrink_one+0x646/0xd20 mm/vmscan.c:4822 shrink_many mm/vmscan.c:4885 [inline] lru_gen_shrink_node mm/vmscan.c:4963 [inline] shrink_node+0x451b/0x5170 mm/vmscan.c:5943 shrink_zones mm/vmscan.c:6201 [inline] do_try_to_free_pages+0x820/0x2550 mm/vmscan.c:6263 try_to_free_pages+0xbed/0x17c0 mm/vmscan.c:6513 __perform_reclaim mm/page_alloc.c:3927 [inline] __alloc_pages_direct_reclaim+0x107/0x330 mm/page_alloc.c:3949 __alloc_pages_slowpath+0x995/0x16e0 mm/page_alloc.c:4380 __alloc_pages_noprof+0xa4c/0xe00 mm/page_alloc.c:4764 alloc_pages_mpol_noprof+0x299/0x990 mm/mempolicy.c:2265 alloc_pages_noprof+0x1bf/0x1e0 mm/mempolicy.c:2345 relay_alloc_buf kernel/relay.c:121 [inline] relay_create_buf kernel/relay.c:162 [inline] relay_open_buf+0x42c/0x17a0 kernel/relay.c:384 relay_open+0x4bb/0xf20 kernel/relay.c:517 do_blk_trace_setup+0x6a6/0xe50 kernel/trace/blktrace.c:590 __blk_trace_setup kernel/trace/blktrace.c:630 [inline] blk_trace_setup+0x117/0x230 kernel/trace/blktrace.c:648 sg_ioctl_common drivers/scsi/sg.c:1121 [inline] sg_ioctl+0xd92/0x48b0 drivers/scsi/sg.c:1163 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:906 [inline] __se_sys_ioctl+0x246/0x440 fs/ioctl.c:892 __x64_sys_ioctl+0x96/0xe0 fs/ioctl.c:892 x64_sys_call+0x19f0/0x3c30 arch/x86/include/generated/asm/syscalls_64.h:17 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: get_next_data lib/842/842_compress.c:412 [inline] sw842_compress+0xdfc/0x5990 lib/842/842_compress.c:522 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 mm/zswap.c:918 [inline] zswap_store+0x1cea/0x3650 mm/zswap.c:1460 swap_writepage+0xa67/0x17f0 mm/page_io.c:279 shmem_writepage+0x2117/0x2450 mm/shmem.c:1572 pageout mm/vmscan.c:689 [inline] shrink_folio_list+0x5e7f/0x7dd0 mm/vmscan.c:1367 evict_folios+0x9813/0xbaf0 mm/vmscan.c:4589 try_to_shrink_lruvec+0x13a3/0x1750 mm/vmscan.c:4784 shrink_one+0x646/0xd20 mm/vmscan.c:4822 shrink_many mm/vmscan.c:4885 [inline] lru_gen_shrink_node mm/vmscan.c:4963 [inline] shrink_node+0x451b/0x5170 mm/vmscan.c:5943 shrink_zones mm/vmscan.c:6201 [inline] do_try_to_free_pages+0x820/0x2550 mm/vmscan.c:6263 try_to_free_pages+0xbed/0x17c0 mm/vmscan.c:6513 __perform_reclaim mm/page_alloc.c:3927 [inline] __alloc_pages_direct_reclaim+0x107/0x330 mm/page_alloc.c:3949 __alloc_pages_slowpath+0x995/0x16e0 mm/page_alloc.c:4380 __alloc_pages_noprof+0xa4c/0xe00 mm/page_alloc.c:4764 alloc_pages_mpol_noprof+0x299/0x990 mm/mempolicy.c:2265 alloc_pages_noprof+0x1bf/0x1e0 mm/mempolicy.c:2345 relay_alloc_buf kernel/relay.c:121 [inline] relay_create_buf kernel/relay.c:162 [inline] relay_open_buf+0x42c/0x17a0 kernel/relay.c:384 relay_open+0x4bb/0xf20 kernel/relay.c:517 do_blk_trace_setup+0x6a6/0xe50 kernel/trace/blktrace.c:590 __blk_trace_setup kernel/trace/blktrace.c:630 [inline] blk_trace_setup+0x117/0x230 kernel/trace/blktrace.c:648 sg_ioctl_common drivers/scsi/sg.c:1121 [inline] sg_ioctl+0xd92/0x48b0 drivers/scsi/sg.c:1163 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:906 [inline] __se_sys_ioctl+0x246/0x440 fs/ioctl.c:892 __x64_sys_ioctl+0x96/0xe0 fs/ioctl.c:892 x64_sys_call+0x19f0/0x3c30 arch/x86/include/generated/asm/syscalls_64.h:17 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_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+0x1299/0x30c0 lib/iov_iter.c:483 copy_folio_from_iter_atomic include/linux/uio.h:201 [inline] generic_perform_write+0x8d1/0x1080 mm/filemap.c:4068 shmem_file_write_iter+0x2ba/0x2f0 mm/shmem.c:3269 do_iter_readv_writev+0x88a/0xa30 vfs_iter_write+0x44d/0xd40 fs/read_write.c:974 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:1909 [inline] loop_process_work+0x15fb/0x3760 drivers/block/loop.c:1944 loop_workfn+0x48/0x60 drivers/block/loop.c:1968 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: lmWriteRecord+0xf4c/0x1870 fs/jfs/jfs_logmgr.c:473 lmLogInit+0x1c4c/0x25f0 fs/jfs/jfs_logmgr.c:1367 open_inline_log fs/jfs/jfs_logmgr.c:1175 [inline] lmLogOpen+0xc05/0x20a0 fs/jfs/jfs_logmgr.c:1069 jfs_mount_rw+0xf2/0x9f0 fs/jfs/jfs_mount.c:257 jfs_fill_super+0xcfb/0x17c0 fs/jfs/super.c:532 get_tree_bdev_flags+0x6ec/0x910 fs/super.c:1636 get_tree_bdev+0x37/0x50 fs/super.c:1659 jfs_get_tree+0x34/0x40 fs/jfs/super.c:635 vfs_get_tree+0xb1/0x5a0 fs/super.c:1814 do_new_mount+0x71f/0x15e0 fs/namespace.c:3507 path_mount+0x742/0x1f10 fs/namespace.c:3834 do_mount fs/namespace.c:3847 [inline] __do_sys_mount fs/namespace.c:4057 [inline] __se_sys_mount+0x722/0x810 fs/namespace.c:4034 __x64_sys_mount+0xe4/0x150 fs/namespace.c:4034 x64_sys_call+0x39bf/0x3c30 arch/x86/include/generated/asm/syscalls_64.h:166 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 lrd created at: lmLogInit+0x41/0x25f0 fs/jfs/jfs_logmgr.c:1243 open_inline_log fs/jfs/jfs_logmgr.c:1175 [inline] lmLogOpen+0xc05/0x20a0 fs/jfs/jfs_logmgr.c:1069 CPU: 0 UID: 0 PID: 10473 Comm: syz.7.989 Not tainted 6.12.0-syzkaller-03657-g43fb83c17ba2 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024 =====================================================