EXT4-fs (loop1): failed to convert unwritten extents to written extents -- potential data loss! (inode 19, error -117) ================================================================== BUG: KASAN: use-after-free in ext4_ext_binsearch fs/ext4/extents.c:827 [inline] BUG: KASAN: use-after-free in ext4_find_extent+0xbab/0xdb0 fs/ext4/extents.c:946 Read of size 4 at addr ffff88811e422474 by task kworker/u4:1/10 CPU: 0 PID: 10 Comm: kworker/u4:1 Not tainted 5.15.148-syzkaller-1069047-g993bed180178 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024 Workqueue: ext4-rsv-conversion ext4_end_io_rsv_work Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x151/0x1b7 lib/dump_stack.c:106 print_address_description+0x87/0x3b0 mm/kasan/report.c:248 __kasan_report mm/kasan/report.c:427 [inline] kasan_report+0x179/0x1c0 mm/kasan/report.c:444 __asan_report_load4_noabort+0x14/0x20 mm/kasan/report_generic.c:308 ext4_ext_binsearch fs/ext4/extents.c:827 [inline] ext4_find_extent+0xbab/0xdb0 fs/ext4/extents.c:946 ext4_ext_map_blocks+0x254/0x7250 fs/ext4/extents.c:4103 ext4_map_blocks+0xaa7/0x1e00 fs/ext4/inode.c:646 ext4_convert_unwritten_extents+0x2e0/0x6c0 fs/ext4/extents.c:4815 ext4_convert_unwritten_io_end_vec+0x104/0x180 fs/ext4/extents.c:4854 ext4_end_io_end fs/ext4/page-io.c:186 [inline] ext4_do_flush_completed_IO fs/ext4/page-io.c:259 [inline] ext4_end_io_rsv_work+0x358/0x690 fs/ext4/page-io.c:273 process_one_work+0x6bb/0xc10 kernel/workqueue.c:2325 worker_thread+0xad5/0x12a0 kernel/workqueue.c:2472 kthread+0x421/0x510 kernel/kthread.c:337 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298 The buggy address belongs to the page: page:ffffea0004790880 refcount:0 mapcount:0 mapping:0000000000000000 index:0x1 pfn:0x11e422 flags: 0x4000000000000000(zone=1) raw: 4000000000000000 ffffea000478a1c8 ffffea0004794e88 0000000000000000 raw: 0000000000000001 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as freed page last allocated via order 0, migratetype Movable, gfp_mask 0x100cca(GFP_HIGHUSER_MOVABLE), pid 403, ts 43840497032, free_ts 44265447467 set_page_owner include/linux/page_owner.h:33 [inline] post_alloc_hook+0x1a3/0x1b0 mm/page_alloc.c:2604 prep_new_page+0x1b/0x110 mm/page_alloc.c:2610 get_page_from_freelist+0x3550/0x35d0 mm/page_alloc.c:4484 __alloc_pages+0x27e/0x8f0 mm/page_alloc.c:5776 __alloc_pages_node include/linux/gfp.h:591 [inline] alloc_pages_node include/linux/gfp.h:605 [inline] alloc_pages include/linux/gfp.h:618 [inline] shmem_alloc_page mm/shmem.c:1587 [inline] shmem_alloc_and_acct_page+0x4bd/0xa80 mm/shmem.c:1612 shmem_getpage_gfp+0x1388/0x23c0 mm/shmem.c:1907 shmem_getpage mm/shmem.c:152 [inline] shmem_write_begin+0xca/0x1b0 mm/shmem.c:2478 generic_perform_write+0x2bc/0x5a0 mm/filemap.c:3843 __generic_file_write_iter+0x25b/0x4b0 mm/filemap.c:3970 generic_file_write_iter+0xaf/0x1c0 mm/filemap.c:4002 call_write_iter include/linux/fs.h:2202 [inline] new_sync_write fs/read_write.c:507 [inline] vfs_write+0xd5d/0x1110 fs/read_write.c:594 ksys_write+0x199/0x2c0 fs/read_write.c:647 __do_sys_write fs/read_write.c:659 [inline] __se_sys_write fs/read_write.c:656 [inline] __x64_sys_write+0x7b/0x90 fs/read_write.c:656 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x61/0xcb page last free stack trace: reset_page_owner include/linux/page_owner.h:26 [inline] free_pages_prepare mm/page_alloc.c:1471 [inline] free_pcp_prepare mm/page_alloc.c:1543 [inline] free_unref_page_prepare+0x7c8/0x7d0 mm/page_alloc.c:3533 free_unref_page_list+0x14b/0xa60 mm/page_alloc.c:3670 release_pages+0x1310/0x1370 mm/swap.c:1009 __pagevec_release+0x84/0x100 mm/swap.c:1029 pagevec_release include/linux/pagevec.h:81 [inline] shmem_undo_range+0x604/0x1560 mm/shmem.c:965 shmem_truncate_range mm/shmem.c:1064 [inline] shmem_evict_inode+0x215/0x9d0 mm/shmem.c:1146 evict+0x2a3/0x630 fs/inode.c:587 iput_final fs/inode.c:1705 [inline] iput+0x63b/0x7e0 fs/inode.c:1731 dentry_unlink_inode+0x34f/0x440 fs/dcache.c:376 __dentry_kill+0x447/0x660 fs/dcache.c:582 dentry_kill+0xc0/0x2a0 dput+0x165/0x320 fs/dcache.c:888 __fput+0x662/0x910 fs/file_table.c:288 ____fput+0x15/0x20 fs/file_table.c:308 task_work_run+0x129/0x190 kernel/task_work.c:164 tracehook_notify_resume include/linux/tracehook.h:189 [inline] exit_to_user_mode_loop+0xc4/0xe0 kernel/entry/common.c:175 Memory state around the buggy address: ffff88811e422300: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff88811e422380: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff >ffff88811e422400: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ^ ffff88811e422480: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff88811e422500: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ================================================================== EXT4-fs error (device loop1): ext4_map_blocks:716: inode #19: block 41: comm kworker/u4:1: lblock 41 mapped to illegal pblock 41 (length 1) EXT4-fs warning (device loop1): ext4_convert_unwritten_extents:4822: inode #19: block 41: len 1: ext4_ext_map_blocks returned -117 EXT4-fs error (device loop1): __ext4_get_inode_loc:4340: comm kworker/u4:1: Invalid inode table block 34360905424 in block_group 0 EXT4-fs (loop1): failed to convert unwritten extents to written extents -- potential data loss! (inode 19, error -117) EXT4-fs warning (device loop1): ext4_convert_unwritten_extents:4822: inode #19: block 42: len 1: ext4_ext_map_blocks returned -117 EXT4-fs (loop1): failed to convert unwritten extents to written extents -- potential data loss! (inode 19, error -117) EXT4-fs warning (device loop1): ext4_convert_unwritten_extents:4822: inode #19: block 43: len 1: ext4_ext_map_blocks returned -117 EXT4-fs (loop1): failed to convert unwritten extents to written extents -- potential data loss! (inode 19, error -117) EXT4-fs warning (device loop1): ext4_convert_unwritten_extents:4822: inode #19: block 44: len 1: ext4_ext_map_blocks returned -117 EXT4-fs (loop1): failed to convert unwritten extents to written extents -- potential data loss! (inode 19, error -117) EXT4-fs warning (device loop1): ext4_convert_unwritten_extents:4822: inode #19: block 45: len 1: ext4_ext_map_blocks returned -117 EXT4-fs (loop1): failed to convert unwritten extents to written extents -- potential data loss! (inode 19, error -117) EXT4-fs warning (device loop1): ext4_convert_unwritten_extents:4822: inode #19: block 46: len 1: ext4_ext_map_blocks returned -117 EXT4-fs (loop1): failed to convert unwritten extents to written extents -- potential data loss! (inode 19, error -117) EXT4-fs warning (device loop1): ext4_convert_unwritten_extents:4822: inode #19: block 47: len 1: ext4_ext_map_blocks returned -117 EXT4-fs (loop1): failed to convert unwritten extents to written extents -- potential data loss! (inode 19, error -117) EXT4-fs error (device loop4): ext4_map_blocks:716: inode #19: block 199: comm kworker/u4:1: lblock 7 mapped to illegal pblock 199 (length 1) EXT4-fs warning (device loop4): ext4_convert_unwritten_extents:4822: inode #19: block 7: len 1: ext4_ext_map_blocks returned -117 EXT4-fs error (device loop4): __ext4_get_inode_loc:4340: comm kworker/u4:1: Invalid inode table block 34360905424 in block_group 0 EXT4-fs error (device loop4) in ext4_reserve_inode_write:5820: Corrupt filesystem EXT4-fs error (device loop4): ext4_convert_unwritten_extents:4823: inode #19: comm kworker/u4:1: mark_inode_dirty error EXT4-fs (loop4): failed to convert unwritten extents to written extents -- potential data loss! (inode 19, error -117) EXT4-fs error (device loop4): ext4_find_extent:929: inode #19: comm kworker/u4:1: pblk 208 bad header/extent: invalid magic - magic 6f69, entries 29795, max 9324(0), depth 20297(0) EXT4-fs warning (device loop4): ext4_convert_unwritten_extents:4822: inode #19: block 8: len 1: ext4_ext_map_blocks returned -117 EXT4-fs error (device loop4): __ext4_get_inode_loc:4340: comm kworker/u4:1: Invalid inode table block 34360905424 in block_group 0 EXT4-fs error (device loop4) in ext4_reserve_inode_write:5820: Corrupt filesystem EXT4-fs error (device loop4): ext4_convert_unwritten_extents:4823: inode #19: comm kworker/u4:1: mark_inode_dirty error EXT4-fs (loop4): failed to convert unwritten extents to written extents -- potential data loss! (inode 19, error -117) EXT4-fs error (device loop2): ext4_find_extent:929: inode #19: comm kworker/u4:1: pblk 208 bad header/extent: invalid magic - magic 6f69, entries 29795, max 9324(0), depth 20297(0) EXT4-fs warning (device loop2): ext4_convert_unwritten_extents:4822: inode #19: block 1: len 1: ext4_ext_map_blocks returned -117 EXT4-fs error (device loop2): __ext4_get_inode_loc:4340: comm kworker/u4:1: Invalid inode table block 34360905424 in block_group 0 EXT4-fs error (device loop2) in ext4_reserve_inode_write:5820: Corrupt filesystem EXT4-fs error (device loop2): ext4_convert_unwritten_extents:4823: inode #19: comm kworker/u4:1: mark_inode_dirty error EXT4-fs (loop2): failed to convert unwritten extents to written extents -- potential data loss! (inode 19, error -117) EXT4-fs error (device loop2): ext4_find_extent:929: inode #19: comm kworker/u4:1: pblk 208 bad header/extent: invalid magic - magic 6f69, entries 29795, max 9324(0), depth 20297(0) EXT4-fs warning (device loop2): ext4_convert_unwritten_extents:4822: inode #19: block 2: len 1: ext4_ext_map_blocks returned -117 EXT4-fs (loop2): failed to convert unwritten extents to written extents -- potential data loss! (inode 19, error -117) EXT4-fs warning (device loop2): ext4_convert_unwritten_extents:4822: inode #19: block 3: len 1: ext4_ext_map_blocks returned -117 EXT4-fs (loop2): failed to convert unwritten extents to written extents -- potential data loss! (inode 19, error -117) EXT4-fs warning (device loop2): ext4_convert_unwritten_extents:4822: inode #19: block 4: len 1: ext4_ext_map_blocks returned -117 EXT4-fs (loop2): failed to convert unwritten extents to written extents -- potential data loss! (inode 19, error -117) EXT4-fs error (device loop1): __ext4_get_inode_loc:4340: comm kworker/u4:1: Invalid inode table block 34360905424 in block_group 0 EXT4-fs error (device loop1): __ext4_get_inode_loc:4340: comm kworker/u4:1: Invalid inode table block 34360905424 in block_group 0 EXT4-fs error (device loop0): ext4_map_blocks:716: inode #19: block 205: comm kworker/u4:1: lblock 13 mapped to illegal pblock 205 (length 1) EXT4-fs warning (device loop0): ext4_convert_unwritten_extents:4822: inode #19: block 13: len 1: ext4_ext_map_blocks returned -117 EXT4-fs error (device loop0): __ext4_get_inode_loc:4340: comm kworker/u4:1: Invalid inode table block 34360905424 in block_group 0 EXT4-fs error (device loop0) in ext4_reserve_inode_write:5820: Corrupt filesystem EXT4-fs error (device loop0): ext4_convert_unwritten_extents:4823: inode #19: comm kworker/u4:1: mark_inode_dirty error EXT4-fs (loop0): failed to convert unwritten extents to written extents -- potential data loss! (inode 19, error -117) EXT4-fs error (device loop0): __ext4_get_inode_loc:4340: comm kworker/u4:1: Invalid inode table block 34360905424 in block_group 0 EXT4-fs error (device loop0): __ext4_get_inode_loc:4340: comm kworker/u4:1: Invalid inode table block 34360905424 in block_group 0 EXT4-fs error (device loop2): __ext4_get_inode_loc:4340: comm kworker/u4:1: Invalid inode table block 34360905424 in block_group 0 EXT4-fs error (device loop2): __ext4_get_inode_loc:4340: comm kworker/u4:1: Invalid inode table block 34360905424 in block_group 0 EXT4-fs error (device loop5): __ext4_get_inode_loc:4340: comm kworker/u4:1: Invalid inode table block 34360905424 in block_group 0 EXT4-fs error (device loop1): __ext4_get_inode_loc:4340: comm kworker/u4:1: Invalid inode table block 34360905424 in block_group 0 EXT4-fs error (device loop1): __ext4_get_inode_loc:4340: comm kworker/u4:1: Invalid inode table block 34360905424 in block_group 0 EXT4-fs error (device loop1): ext4_map_blocks:716: inode #19: block 230: comm kworker/u4:1: lblock 22 mapped to illegal pblock 230 (length 1) EXT4-fs warning (device loop1): ext4_convert_unwritten_extents:4822: inode #19: block 22: len 1: ext4_ext_map_blocks returned -117 EXT4-fs error (device loop1): __ext4_get_inode_loc:4340: comm kworker/u4:1: Invalid inode table block 34360905424 in block_group 0