==================================================================
BUG: KASAN: use-after-free in ext4_ext_binsearch fs/ext4/extents.c:826 [inline]
BUG: KASAN: use-after-free in ext4_find_extent+0xbab/0xdb0 fs/ext4/extents.c:945
Read of size 4 at addr ffff8881222dfa58 by task kworker/u4:6/474

CPU: 1 PID: 474 Comm: kworker/u4:6 Not tainted 5.10.215-syzkaller-1002366-gb58b8f9dad93 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
Workqueue: ext4-rsv-conversion ext4_end_io_rsv_work
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack_lvl+0x1e2/0x24b lib/dump_stack.c:118
 print_address_description+0x81/0x3b0 mm/kasan/report.c:248
 __kasan_report mm/kasan/report.c:435 [inline]
 kasan_report+0x179/0x1c0 mm/kasan/report.c:452
 __asan_report_load4_noabort+0x14/0x20 mm/kasan/report_generic.c:308
 ext4_ext_binsearch fs/ext4/extents.c:826 [inline]
 ext4_find_extent+0xbab/0xdb0 fs/ext4/extents.c:945
 ext4_ext_map_blocks+0x26a/0x6ee0 fs/ext4/extents.c:4137
 ext4_map_blocks+0xa65/0x1d10 fs/ext4/inode.c:644
 ext4_convert_unwritten_extents+0x2a3/0x5a0 fs/ext4/extents.c:4838
 ext4_convert_unwritten_io_end_vec+0x104/0x180 fs/ext4/extents.c:4877
 ext4_end_io_end fs/ext4/page-io.c:189 [inline]
 ext4_do_flush_completed_IO fs/ext4/page-io.c:262 [inline]
 ext4_end_io_rsv_work+0x358/0x690 fs/ext4/page-io.c:276
 process_one_work+0x6dc/0xbd0 kernel/workqueue.c:2301
 worker_thread+0xaea/0x1510 kernel/workqueue.c:2447
 kthread+0x34b/0x3d0 kernel/kthread.c:313
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:299

The buggy address belongs to the page:
page:ffffea000488b7c0 refcount:0 mapcount:0 mapping:0000000000000000 index:0x1 pfn:0x1222df
flags: 0x4000000000000000()
raw: 4000000000000000 ffffea00047f2588 ffffea000488b788 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 439, ts 49816175847, free_ts 50252500583
 set_page_owner include/linux/page_owner.h:35 [inline]
 post_alloc_hook mm/page_alloc.c:2456 [inline]
 prep_new_page+0x166/0x180 mm/page_alloc.c:2462
 get_page_from_freelist+0x2d8c/0x2f30 mm/page_alloc.c:4254
 __alloc_pages_nodemask+0x435/0xaf0 mm/page_alloc.c:5348
 __alloc_pages include/linux/gfp.h:544 [inline]
 __alloc_pages_node include/linux/gfp.h:557 [inline]
 alloc_pages_node include/linux/gfp.h:571 [inline]
 alloc_pages include/linux/gfp.h:590 [inline]
 shmem_alloc_page+0x257/0x420 mm/shmem.c:1580
 shmem_alloc_and_acct_page+0x395/0x8e0 mm/shmem.c:1605
 shmem_getpage_gfp+0x891/0x2480 mm/shmem.c:1918
 shmem_getpage mm/shmem.c:161 [inline]
 shmem_write_begin+0xca/0x1b0 mm/shmem.c:2500
 generic_perform_write+0x2cd/0x570 mm/filemap.c:3509
 __generic_file_write_iter+0x23c/0x560 mm/filemap.c:3638
 generic_file_write_iter+0xaf/0x1c0 mm/filemap.c:3670
 call_write_iter include/linux/fs.h:2021 [inline]
 new_sync_write fs/read_write.c:518 [inline]
 vfs_write+0xb55/0xe70 fs/read_write.c:605
 ksys_write+0x199/0x2c0 fs/read_write.c:658
 __do_sys_write fs/read_write.c:670 [inline]
 __se_sys_write fs/read_write.c:667 [inline]
 __x64_sys_write+0x7b/0x90 fs/read_write.c:667
 do_syscall_64+0x34/0x70
 entry_SYSCALL_64_after_hwframe+0x61/0xc6
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:28 [inline]
 free_pages_prepare mm/page_alloc.c:1349 [inline]
 free_pcp_prepare mm/page_alloc.c:1421 [inline]
 free_unref_page_prepare+0x2ae/0x2d0 mm/page_alloc.c:3336
 free_unref_page_list+0x122/0xb20 mm/page_alloc.c:3443
 release_pages+0xea0/0xef0 mm/swap.c:1103
 __pagevec_release+0x84/0x100 mm/swap.c:1123
 pagevec_release include/linux/pagevec.h:88 [inline]
 shmem_undo_range+0x7d1/0x1a60 mm/shmem.c:965
 shmem_truncate_range mm/shmem.c:1069 [inline]
 shmem_evict_inode+0x215/0x9d0 mm/shmem.c:1169
 evict+0x2a3/0x6c0 fs/inode.c:577
 iput_final fs/inode.c:1697 [inline]
 iput+0x632/0x7e0 fs/inode.c:1723
 dentry_unlink_inode+0x2e5/0x3d0 fs/dcache.c:374
 __dentry_kill+0x447/0x650 fs/dcache.c:579
 dentry_kill+0xc0/0x2a0
 dput+0x40/0x80 fs/dcache.c:879
 __fput+0x4f4/0x760 fs/file_table.c:294
 ____fput+0x15/0x20 fs/file_table.c:314
 task_work_run+0x129/0x190 kernel/task_work.c:165
 tracehook_notify_resume include/linux/tracehook.h:188 [inline]
 exit_to_user_mode_loop+0xbf/0xd0 kernel/entry/common.c:172

Memory state around the buggy address:
 ffff8881222df900: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff8881222df980: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
>ffff8881222dfa00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
                                                    ^
 ffff8881222dfa80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff8881222dfb00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
==================================================================
EXT4-fs error (device loop3): ext4_map_blocks:710: inode #19: block 27: comm kworker/u4:6: lblock 27 mapped to illegal pblock 27 (length 1)
EXT4-fs warning (device loop3): ext4_convert_unwritten_extents:4845: inode #19: block 27: len 1: ext4_ext_map_blocks returned -117
EXT4-fs error (device loop3): __ext4_get_inode_loc:4409: comm kworker/u4:6: Invalid inode table block 34360905424 in block_group 0
EXT4-fs error (device loop3) in ext4_reserve_inode_write:5869: Corrupt filesystem
EXT4-fs error (device loop3): ext4_convert_unwritten_extents:4846: inode #19: comm kworker/u4:6: mark_inode_dirty error
EXT4-fs (loop3): failed to convert unwritten extents to written extents -- potential data loss!  (inode 19, error -117)
EXT4-fs error (device loop3): ext4_map_blocks:710: inode #19: block 28: comm kworker/u4:6: lblock 28 mapped to illegal pblock 28 (length 1)
EXT4-fs warning (device loop3): ext4_convert_unwritten_extents:4845: inode #19: block 28: len 1: ext4_ext_map_blocks returned -117
EXT4-fs error (device loop3): __ext4_get_inode_loc:4409: comm kworker/u4:6: Invalid inode table block 34360905424 in block_group 0
EXT4-fs error (device loop3) in ext4_reserve_inode_write:5869: Corrupt filesystem
EXT4-fs error (device loop3): ext4_convert_unwritten_extents:4846: inode #19: comm kworker/u4:6: mark_inode_dirty error
EXT4-fs (loop3): failed to convert unwritten extents to written extents -- potential data loss!  (inode 19, error -117)
EXT4-fs error (device loop2): __ext4_get_inode_loc:4409: comm kworker/u4:6: Invalid inode table block 34360905424 in block_group 0
EXT4-fs error (device loop2): ext4_map_blocks:710: inode #19: block 196: comm kworker/u4:6: lblock 4 mapped to illegal pblock 196 (length 1)
EXT4-fs warning (device loop2): ext4_convert_unwritten_extents:4845: inode #19: block 4: len 1: ext4_ext_map_blocks returned -117
EXT4-fs error (device loop2): __ext4_get_inode_loc:4409: comm kworker/u4:6: Invalid inode table block 34360905424 in block_group 0
EXT4-fs error (device loop2) in ext4_reserve_inode_write:5869: Corrupt filesystem
EXT4-fs error (device loop2): ext4_convert_unwritten_extents:4846: inode #19: comm kworker/u4:6: 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 loop4): __ext4_get_inode_loc:4409: comm kworker/u4:6: Invalid inode table block 34360905424 in block_group 0
EXT4-fs error (device loop5): ext4_map_blocks:710: inode #19: block 204: comm kworker/u4:6: lblock 12 mapped to illegal pblock 204 (length 1)
EXT4-fs warning (device loop5): ext4_convert_unwritten_extents:4845: inode #19: block 12: len 1: ext4_ext_map_blocks returned -117
EXT4-fs error (device loop5): __ext4_get_inode_loc:4409: comm kworker/u4:6: Invalid inode table block 34360905424 in block_group 0
EXT4-fs error (device loop5) in ext4_reserve_inode_write:5869: Corrupt filesystem
EXT4-fs error (device loop5): ext4_convert_unwritten_extents:4846: inode #19: comm kworker/u4:6: mark_inode_dirty error
EXT4-fs (loop5): failed to convert unwritten extents to written extents -- potential data loss!  (inode 19, error -117)
EXT4-fs error (device loop5): ext4_find_extent:928: inode #19: comm kworker/u4:6: pblk 208 bad header/extent: invalid magic - magic 6f69, entries 29795, max 9324(0), depth 20297(0)
EXT4-fs warning (device loop5): ext4_convert_unwritten_extents:4845: inode #19: block 13: len 1: ext4_ext_map_blocks returned -117
EXT4-fs error (device loop5): __ext4_get_inode_loc:4409: comm kworker/u4:6: Invalid inode table block 34360905424 in block_group 0
EXT4-fs error (device loop5) in ext4_reserve_inode_write:5869: Corrupt filesystem
EXT4-fs error (device loop5): ext4_convert_unwritten_extents:4846: inode #19: comm kworker/u4:6: mark_inode_dirty error
EXT4-fs (loop5): failed to convert unwritten extents to written extents -- potential data loss!  (inode 19, error -117)
EXT4-fs error (device loop5): ext4_find_extent:928: inode #19: comm kworker/u4:6: pblk 208 bad header/extent: invalid magic - magic 6f69, entries 29795, max 9324(0), depth 20297(0)
EXT4-fs warning (device loop5): ext4_convert_unwritten_extents:4845: inode #19: block 14: len 1: ext4_ext_map_blocks returned -117
EXT4-fs (loop5): failed to convert unwritten extents to written extents -- potential data loss!  (inode 19, error -117)
EXT4-fs warning (device loop5): ext4_convert_unwritten_extents:4845: inode #19: block 15: len 1: ext4_ext_map_blocks returned -117
EXT4-fs (loop5): failed to convert unwritten extents to written extents -- potential data loss!  (inode 19, error -117)
EXT4-fs warning (device loop5): ext4_convert_unwritten_extents:4845: inode #19: block 16: len 1: ext4_ext_map_blocks returned -117
EXT4-fs (loop5): failed to convert unwritten extents to written extents -- potential data loss!  (inode 19, error -117)
EXT4-fs warning (device loop5): ext4_convert_unwritten_extents:4845: inode #19: block 17: len 1: ext4_ext_map_blocks returned -117
EXT4-fs (loop5): failed to convert unwritten extents to written extents -- potential data loss!  (inode 19, error -117)
EXT4-fs warning (device loop5): ext4_convert_unwritten_extents:4845: inode #19: block 18: len 1: ext4_ext_map_blocks returned -117
EXT4-fs (loop5): failed to convert unwritten extents to written extents -- potential data loss!  (inode 19, error -117)
EXT4-fs warning (device loop5): ext4_convert_unwritten_extents:4845: inode #19: block 19: len 1: ext4_ext_map_blocks returned -117
EXT4-fs (loop5): failed to convert unwritten extents to written extents -- potential data loss!  (inode 19, error -117)
EXT4-fs warning (device loop5): ext4_convert_unwritten_extents:4845: inode #19: block 20: len 1: ext4_ext_map_blocks returned -117
EXT4-fs warning (device loop5): ext4_convert_unwritten_extents:4845: inode #19: block 21: len 1: ext4_ext_map_blocks returned -117
EXT4-fs error (device loop5): __ext4_get_inode_loc:4409: comm kworker/u4:6: Invalid inode table block 34360905424 in block_group 0
EXT4-fs error (device loop1): ext4_map_blocks:710: inode #19: block 193: comm kworker/u4:6: lblock 1 mapped to illegal pblock 193 (length 1)
EXT4-fs warning (device loop1): ext4_convert_unwritten_extents:4845: inode #19: block 1: len 1: ext4_ext_map_blocks returned -117
EXT4-fs error (device loop1): __ext4_get_inode_loc:4409: comm kworker/u4:6: Invalid inode table block 34360905424 in block_group 0
EXT4-fs error (device loop1) in ext4_reserve_inode_write:5869: Corrupt filesystem
EXT4-fs error (device loop1): ext4_convert_unwritten_extents:4846: inode #19: comm kworker/u4:6: mark_inode_dirty error
EXT4-fs (loop1): failed to convert unwritten extents to written extents -- potential data loss!  (inode 19, error -117)
EXT4-fs error (device loop1): ext4_find_extent:928: inode #19: comm kworker/u4:6: pblk 208 bad header/extent: invalid magic - magic 6f69, entries 29795, max 9324(0), depth 20297(0)
EXT4-fs warning (device loop1): ext4_convert_unwritten_extents:4845: inode #19: block 2: len 1: ext4_ext_map_blocks returned -117
EXT4-fs error (device loop1): __ext4_get_inode_loc:4409: comm kworker/u4:6: Invalid inode table block 34360905424 in block_group 0
EXT4-fs error (device loop1) in ext4_reserve_inode_write:5869: Corrupt filesystem
EXT4-fs error (device loop1): ext4_convert_unwritten_extents:4846: inode #19: comm kworker/u4:6: mark_inode_dirty error
EXT4-fs (loop1): failed to convert unwritten extents to written extents -- potential data loss!  (inode 19, error -117)
EXT4-fs error (device loop1): ext4_find_extent:928: inode #19: comm kworker/u4:6: pblk 208 bad header/extent: invalid magic - magic 6f69, entries 29795, max 9324(0), depth 20297(0)
EXT4-fs warning (device loop1): ext4_convert_unwritten_extents:4845: inode #19: block 3: len 1: ext4_ext_map_blocks returned -117
EXT4-fs error (device loop1): __ext4_get_inode_loc:4409: comm kworker/u4:6: 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:4845: inode #19: block 4: 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:4845: inode #19: block 5: 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:4845: inode #19: block 6: 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:4845: inode #19: block 7: 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:4845: inode #19: block 8: 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:4845: inode #19: block 9: 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:4845: inode #19: block 10: 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_get_inode_loc:4409: comm kworker/u4:6: Invalid inode table block 34360905424 in block_group 0
EXT4-fs error (device loop2): ext4_map_blocks:710: inode #19: block 224: comm kworker/u4:6: lblock 16 mapped to illegal pblock 224 (length 1)
EXT4-fs warning (device loop2): ext4_convert_unwritten_extents:4845: inode #19: block 16: len 1: ext4_ext_map_blocks returned -117
EXT4-fs error (device loop2): __ext4_get_inode_loc:4409: comm kworker/u4:6: Invalid inode table block 34360905424 in block_group 0
EXT4-fs error (device loop2) in ext4_reserve_inode_write:5869: Corrupt filesystem
EXT4-fs error (device loop2): ext4_convert_unwritten_extents:4846: inode #19: comm kworker/u4:6: 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_map_blocks:710: inode #19: block 225: comm kworker/u4:6: lblock 17 mapped to illegal pblock 225 (length 1)
EXT4-fs warning (device loop2): ext4_convert_unwritten_extents:4845: inode #19: block 17: len 1: ext4_ext_map_blocks returned -117
EXT4-fs error (device loop2): __ext4_get_inode_loc:4409: comm kworker/u4:6: Invalid inode table block 34360905424 in block_group 0
EXT4-fs error (device loop2) in ext4_reserve_inode_write:5869: Corrupt filesystem
EXT4-fs error (device loop2): ext4_convert_unwritten_extents:4846: inode #19: comm kworker/u4:6: 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:928: inode #19: comm kworker/u4:6: 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:4845: inode #19: block 18: len 1: ext4_ext_map_blocks returned -117
EXT4-fs error (device loop2): __ext4_get_inode_loc:4409: comm kworker/u4:6: Invalid inode table block 34360905424 in block_group 0
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:4845: inode #19: block 19: 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:4845: inode #19: block 20: 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:4845: inode #19: block 21: 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:4845: inode #19: block 22: 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:4845: inode #19: block 23: 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:4845: inode #19: block 24: 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:4845: inode #19: block 25: 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:4409: comm kworker/u4:6: Invalid inode table block 34360905424 in block_group 0
EXT4-fs error (device loop4): __ext4_get_inode_loc:4409: comm kworker/u4:6: Invalid inode table block 34360905424 in block_group 0
EXT4-fs error (device loop0): __ext4_get_inode_loc:4409: comm kworker/u4:6: Invalid inode table block 34360905424 in block_group 0
EXT4-fs error (device loop5): ext4_map_blocks:710: inode #19: block 205: comm kworker/u4:6: lblock 13 mapped to illegal pblock 205 (length 1)
EXT4-fs warning (device loop5): ext4_convert_unwritten_extents:4845: inode #19: block 13: len 1: ext4_ext_map_blocks returned -117
EXT4-fs error (device loop5): __ext4_get_inode_loc:4409: comm kworker/u4:6: Invalid inode table block 34360905424 in block_group 0
EXT4-fs error (device loop5) in ext4_reserve_inode_write:5869: Corrupt filesystem
EXT4-fs error (device loop5): ext4_convert_unwritten_extents:4846: inode #19: comm kworker/u4:6: mark_inode_dirty error
EXT4-fs (loop5): failed to convert unwritten extents to written extents -- potential data loss!  (inode 19, error -117)
EXT4-fs error (device loop5): ext4_find_extent:928: inode #19: comm kworker/u4:6: pblk 208 bad header/extent: invalid magic - magic 6f69, entries 29795, max 9324(0), depth 20297(0)
EXT4-fs warning (device loop5): ext4_convert_unwritten_extents:4845: inode #19: block 14: len 1: ext4_ext_map_blocks returned -117
EXT4-fs error (device loop5): __ext4_get_inode_loc:4409: comm kworker/u4:6: Invalid inode table block 34360905424 in block_group 0
EXT4-fs error (device loop5) in ext4_reserve_inode_write:5869: Corrupt filesystem