EXT4-fs error (device loop0): __ext4_get_inode_loc:4409: comm kworker/u4:3: Invalid inode table block 0 in block_group 0
EXT4-fs error (device loop0): __ext4_get_inode_loc:4409: comm kworker/u4:3: Invalid inode table block 0 in block_group 0
==================================================================
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 ffff88811eb40078 by task kworker/u4:3/360

CPU: 0 PID: 360 Comm: kworker/u4:3 Not tainted 5.10.214-syzkaller-1002110-gd3c4d815bf09 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
Workqueue: writeback wb_workfn (flush-7:0)
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
 mpage_map_one_extent fs/ext4/inode.c:2423 [inline]
 mpage_map_and_submit_extent fs/ext4/inode.c:2476 [inline]
 ext4_writepages+0x148b/0x3c00 fs/ext4/inode.c:2844
 do_writepages+0x12e/0x270 mm/page-writeback.c:2358
 __writeback_single_inode+0xd7/0xac0 fs/fs-writeback.c:1470
 writeback_sb_inodes+0x99c/0x16b0 fs/fs-writeback.c:1733
 wb_writeback+0x404/0xc60 fs/fs-writeback.c:1908
 wb_do_writeback fs/fs-writeback.c:2053 [inline]
 wb_workfn+0x3d9/0x1110 fs/fs-writeback.c:2094
 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:ffffea00047ad000 refcount:0 mapcount:0 mapping:0000000000000000 index:0x1 pfn:0x11eb40
flags: 0x4000000000000000()
raw: 4000000000000000 ffffea00047ad048 ffffea00047ab5c8 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 0x8100dca(GFP_HIGHUSER_MOVABLE|__GFP_ZERO|0x8000000), pid 374, ts 42870179205, free_ts 42877059618
 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:5346
 __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]
 do_anonymous_page mm/memory.c:3935 [inline]
 handle_pte_fault+0x1782/0x3e30 mm/memory.c:4758
 ___handle_speculative_fault mm/memory.c:5191 [inline]
 __handle_speculative_fault+0x13a6/0x1ec0 mm/memory.c:5240
 handle_speculative_fault include/linux/mm.h:1824 [inline]
 do_user_addr_fault arch/x86/mm/fault.c:1310 [inline]
 handle_page_fault arch/x86/mm/fault.c:1453 [inline]
 exc_page_fault+0x234/0x5b0 arch/x86/mm/fault.c:1509
 asm_exc_page_fault+0x1e/0x30 arch/x86/include/asm/idtentry.h:571
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
 free_pages_and_swap_cache+0x8a/0xa0 mm/swap_state.c:356
 tlb_batch_pages_flush mm/mmu_gather.c:49 [inline]
 tlb_flush_mmu_free mm/mmu_gather.c:240 [inline]
 tlb_flush_mmu mm/mmu_gather.c:247 [inline]
 tlb_finish_mmu+0x177/0x320 mm/mmu_gather.c:326
 unmap_region+0x31c/0x370 mm/mmap.c:2810
 __do_munmap+0x699/0x8c0 mm/mmap.c:3041
 __vm_munmap mm/mmap.c:3064 [inline]
 __do_sys_munmap mm/mmap.c:3090 [inline]
 __se_sys_munmap+0x120/0x1a0 mm/mmap.c:3086
 __x64_sys_munmap+0x5b/0x70 mm/mmap.c:3086
 do_syscall_64+0x34/0x70
 entry_SYSCALL_64_after_hwframe+0x61/0xc6

Memory state around the buggy address:
 ffff88811eb3ff00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff88811eb3ff80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff88811eb40000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
                                                                ^
 ffff88811eb40080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff88811eb40100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
==================================================================
------------[ cut here ]------------
kernel BUG at fs/ext4/inode.c:2435!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 360 Comm: kworker/u4:3 Tainted: G    B             5.10.214-syzkaller-1002110-gd3c4d815bf09 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
Workqueue: writeback wb_workfn (flush-7:0)
RIP: 0010:mpage_map_one_extent fs/ext4/inode.c:2435 [inline]
RIP: 0010:mpage_map_and_submit_extent fs/ext4/inode.c:2476 [inline]
RIP: 0010:ext4_writepages+0x3b44/0x3c00 fs/ext4/inode.c:2844
Code: 00 74 08 48 89 df e8 4b e4 c9 ff 48 8b 3b 48 8b 74 24 28 48 8b 54 24 50 44 89 e1 45 89 f8 e8 53 d8 07 00 eb 5d e8 3c 54 8c ff <0f> 0b e8 35 54 8c ff eb 3b e8 2e 54 8c ff eb 77 e8 27 54 8c ff 31
RSP: 0018:ffffc90000f470a0 EFLAGS: 00010293
RAX: ffffffff81de5764 RBX: dffffc0000000000 RCX: ffff88810c8fe2c0
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90000f47490 R08: ffffffff81de3369 R09: ffffed10238cd3d5
R10: 0000000000000000 R11: dffffc0000000001 R12: ffffc90000f473b0
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8881f7200000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000200090bf CR3: 000000010bad7000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 do_writepages+0x12e/0x270 mm/page-writeback.c:2358
 __writeback_single_inode+0xd7/0xac0 fs/fs-writeback.c:1470
 writeback_sb_inodes+0x99c/0x16b0 fs/fs-writeback.c:1733
 wb_writeback+0x404/0xc60 fs/fs-writeback.c:1908
 wb_do_writeback fs/fs-writeback.c:2053 [inline]
 wb_workfn+0x3d9/0x1110 fs/fs-writeback.c:2094
 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
Modules linked in:
---[ end trace 50591c049faba27e ]---
RIP: 0010:mpage_map_one_extent fs/ext4/inode.c:2435 [inline]
RIP: 0010:mpage_map_and_submit_extent fs/ext4/inode.c:2476 [inline]
RIP: 0010:ext4_writepages+0x3b44/0x3c00 fs/ext4/inode.c:2844
Code: 00 74 08 48 89 df e8 4b e4 c9 ff 48 8b 3b 48 8b 74 24 28 48 8b 54 24 50 44 89 e1 45 89 f8 e8 53 d8 07 00 eb 5d e8 3c 54 8c ff <0f> 0b e8 35 54 8c ff eb 3b e8 2e 54 8c ff eb 77 e8 27 54 8c ff 31
RSP: 0018:ffffc90000f470a0 EFLAGS: 00010293
RAX: ffffffff81de5764 RBX: dffffc0000000000 RCX: ffff88810c8fe2c0
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90000f47490 R08: ffffffff81de3369 R09: ffffed10238cd3d5
R10: 0000000000000000 R11: dffffc0000000001 R12: ffffc90000f473b0
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8881f7200000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000200090bf CR3: 000000010bad7000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400