ci2 starts bisection 2023-05-01 12:38:23.575215217 +0000 UTC m=+248157.595586407
bisecting fixing commit since 7364b7abbafbeaab61d763c46d84145488b98a3c
building syzkaller on f325deb023e4e2fb9197004be1b3da738680429c
ensuring issue is reproducible on original commit 7364b7abbafbeaab61d763c46d84145488b98a3c

testing commit 7364b7abbafbeaab61d763c46d84145488b98a3c gcc
compiler: Debian clang version 15.0.7, GNU ld (GNU Binutils for Debian) 2.35.2
kernel signature: bb7f23063ef2c53089e62dca71c5dfd52a7229fdeeebaae16c6cd5d985f3f3a4
run #0: crashed: kernel BUG in ext4_writepages
run #1: crashed: kernel BUG in ext4_writepages
run #2: crashed: KASAN: use-after-free Read in ext4_find_extent
run #3: crashed: KASAN: use-after-free Read in ext4_find_extent
run #4: crashed: KASAN: use-after-free Read in ext4_find_extent
run #5: crashed: kernel BUG in ext4_writepages
run #6: crashed: KASAN: use-after-free Read in ext4_find_extent
run #7: crashed: KASAN: use-after-free Read in ext4_find_extent
run #8: crashed: KASAN: use-after-free Read in ext4_find_extent
run #9: crashed: KASAN: use-after-free Read in ext4_find_extent
run #10: crashed: KASAN: use-after-free Read in ext4_find_extent
run #11: crashed: KASAN: use-after-free Read in ext4_find_extent
run #12: crashed: KASAN: use-after-free Read in ext4_find_extent
run #13: crashed: KASAN: use-after-free Read in ext4_find_extent
run #14: crashed: KASAN: use-after-free Read in ext4_find_extent
run #15: crashed: kernel BUG in ext4_writepages
run #16: crashed: kernel BUG in ext4_writepages
run #17: crashed: KASAN: use-after-free Read in ext4_find_extent
run #18: crashed: kernel BUG in ext4_writepages
run #19: crashed: KASAN: use-after-free Read in ext4_find_extent
testing current HEAD 6d40cb68a6574b87010d46930eb0c2f830835cc2
testing commit 6d40cb68a6574b87010d46930eb0c2f830835cc2 gcc
compiler: Debian clang version 15.0.7, GNU ld (GNU Binutils for Debian) 2.35.2
kernel signature: 1d3853ea66b8f0af07f038d31e433fc2a8606979f1afc9f7ccd0ca6f27769a8e
run #0: crashed: KASAN: use-after-free Read in ext4_find_extent
run #1: crashed: KASAN: use-after-free Read in ext4_find_extent
run #2: crashed: KASAN: slab-out-of-bounds Read in ext4_find_extent
run #3: crashed: kernel BUG in ext4_writepages
run #4: crashed: KASAN: use-after-free Read in ext4_find_extent
run #5: crashed: KASAN: use-after-free Read in ext4_find_extent
run #6: crashed: KASAN: use-after-free Read in ext4_find_extent
run #7: crashed: kernel BUG in ext4_writepages
run #8: crashed: KASAN: use-after-free Read in ext4_find_extent
run #9: crashed: KASAN: use-after-free Read in ext4_find_extent
revisions tested: 2, total time: 18m21.270801747s (build: 11m41.61508631s, test: 6m7.607597066s)
the crash still happens on HEAD
commit msg: Revert "HID: core: Provide new max_buffer_size attribute to over-ride the default"
crash: KASAN: use-after-free Read in ext4_find_extent
EXT4-fs error (device loop0): __ext4_get_inode_loc:4347: comm kworker/u4:0: Invalid inode table block 0 in block_group 0
==================================================================
BUG: KASAN: use-after-free in ext4_ext_binsearch fs/ext4/extents.c:827 [inline]
BUG: KASAN: use-after-free in ext4_find_extent+0xb60/0xd10 fs/ext4/extents.c:946
Read of size 4 at addr ffff888122ea2058 by task kworker/u4:0/8

CPU: 1 PID: 8 Comm: kworker/u4:0 Not tainted 5.15.104-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/14/2023
Workqueue: writeback wb_workfn (flush-7:0)
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x105/0x148 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+0xb60/0xd10 fs/ext4/extents.c:946
 ext4_ext_map_blocks+0x262/0x68c0 fs/ext4/extents.c:4103
 ext4_map_blocks+0x87b/0x18d0 fs/ext4/inode.c:646
 mpage_map_one_extent fs/ext4/inode.c:2419 [inline]
 mpage_map_and_submit_extent fs/ext4/inode.c:2472 [inline]
 ext4_writepages+0x14cd/0x33b0 fs/ext4/inode.c:2840
 do_writepages+0x433/0x6a0 mm/page-writeback.c:2366
 __writeback_single_inode+0xae/0x720 fs/fs-writeback.c:1622
 writeback_sb_inodes+0x87e/0x1500 fs/fs-writeback.c:1905
 wb_writeback+0x357/0x810 fs/fs-writeback.c:2079
 wb_do_writeback fs/fs-writeback.c:2222 [inline]
 wb_workfn+0x3ac/0xe90 fs/fs-writeback.c:2263
 process_one_work+0x635/0xa70 kernel/workqueue.c:2313
 worker_thread+0x8bb/0xf40 kernel/workqueue.c:2460
 kthread+0x3a1/0x480 kernel/kthread.c:319
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298
 </TASK>

The buggy address belongs to the page:
page:ffffea00048ba880 refcount:0 mapcount:0 mapping:0000000000000000 index:0x1 pfn:0x122ea2
flags: 0x4000000000000000(zone=1)
raw: 4000000000000000 ffffea00048ba8c8 ffffea00047f1c88 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 0x101cca(GFP_HIGHUSER_MOVABLE|__GFP_WRITE), pid 355, ts 46679640404, free_ts 46679710323
 set_page_owner include/linux/page_owner.h:33 [inline]
 post_alloc_hook+0x1a3/0x1b0 mm/page_alloc.c:2502
 prep_new_page mm/page_alloc.c:2508 [inline]
 get_page_from_freelist+0x2c14/0x2cf0 mm/page_alloc.c:4291
 __alloc_pages+0x386/0x7b0 mm/page_alloc.c:5569
 __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]
 __page_cache_alloc include/linux/pagemap.h:305 [inline]
 pagecache_get_page+0x74c/0x960 mm/filemap.c:1940
 grab_cache_page_write_begin+0x48/0x80 mm/filemap.c:3785
 ext4_write_begin+0x237/0xf00 fs/ext4/inode.c:1194
 ext4_da_write_begin+0x3ed/0x910 fs/ext4/inode.c:2986
 generic_perform_write+0x2ad/0x4e0 mm/filemap.c:3831
 ext4_buffered_write_iter+0x3fa/0x540 fs/ext4/file.c:271
 ext4_file_write_iter+0x441/0x1890
 call_write_iter include/linux/fs.h:2159 [inline]
 new_sync_write fs/read_write.c:507 [inline]
 vfs_write+0x713/0xd00 fs/read_write.c:594
 ksys_write+0x15c/0x240 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+0x76/0x80 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:1370 [inline]
 free_pcp_prepare mm/page_alloc.c:1442 [inline]
 free_unref_page_prepare+0x7c8/0x7d0 mm/page_alloc.c:3441
 free_unref_page+0xac/0x2c0 mm/page_alloc.c:3521
 __put_single_page mm/swap.c:98 [inline]
 __put_page+0x7e/0x90 mm/swap.c:129
 put_page include/linux/mm.h:1295 [inline]
 ext4_write_begin+0xb69/0xf00 fs/ext4/inode.c:1276
 ext4_da_write_begin+0x3ed/0x910 fs/ext4/inode.c:2986
 generic_perform_write+0x2ad/0x4e0 mm/filemap.c:3831
 ext4_buffered_write_iter+0x3fa/0x540 fs/ext4/file.c:271
 ext4_file_write_iter+0x441/0x1890
 call_write_iter include/linux/fs.h:2159 [inline]
 new_sync_write fs/read_write.c:507 [inline]
 vfs_write+0x713/0xd00 fs/read_write.c:594
 ksys_write+0x15c/0x240 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+0x76/0x80 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

Memory state around the buggy address:
 ffff888122ea1f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff888122ea1f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff888122ea2000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
                                                    ^
 ffff888122ea2080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff888122ea2100: 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:2431!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 8 Comm: kworker/u4:0 Tainted: G    B             5.15.104-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/14/2023
Workqueue: writeback wb_workfn (flush-7:0)
RIP: 0010:mpage_map_one_extent fs/ext4/inode.c:2431 [inline]
RIP: 0010:mpage_map_and_submit_extent fs/ext4/inode.c:2472 [inline]
RIP: 0010:ext4_writepages+0x339e/0x33b0 fs/ext4/inode.c:2840
Code: 00 65 ff 0d 5c f6 38 7e 49 bf 00 00 00 00 00 fc ff df 4c 8b a4 24 b8 00 00 00 0f 85 50 fb ff ff e8 7f f6 36 ff e9 46 fb ff ff <0f> 0b 0f 0b 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 55 48 89 e5
RSP: 0018:ffffc90000087060 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffffc90000087340 RCX: 1ffff92000010e6e
RDX: 0000000000000001 RSI: 0000000000000008 RDI: 0000000000000001
RBP: ffffc90000087470 R08: dffffc0000000000 R09: ffffed1021fcd82d
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000000
R13: 0000000000000000 R14: ffff88810fe6c1a0 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8881f7300000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005555574d3728 CR3: 000000010b6b1000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 do_writepages+0x433/0x6a0 mm/page-writeback.c:2366
 __writeback_single_inode+0xae/0x720 fs/fs-writeback.c:1622
 writeback_sb_inodes+0x87e/0x1500 fs/fs-writeback.c:1905
 wb_writeback+0x357/0x810 fs/fs-writeback.c:2079
 wb_do_writeback fs/fs-writeback.c:2222 [inline]
 wb_workfn+0x3ac/0xe90 fs/fs-writeback.c:2263
 process_one_work+0x635/0xa70 kernel/workqueue.c:2313
 worker_thread+0x8bb/0xf40 kernel/workqueue.c:2460
 kthread+0x3a1/0x480 kernel/kthread.c:319
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298
 </TASK>
Modules linked in:
---[ end trace cd2aa10cbe9ae133 ]---
RIP: 0010:mpage_map_one_extent fs/ext4/inode.c:2431 [inline]
RIP: 0010:mpage_map_and_submit_extent fs/ext4/inode.c:2472 [inline]
RIP: 0010:ext4_writepages+0x339e/0x33b0 fs/ext4/inode.c:2840
Code: 00 65 ff 0d 5c f6 38 7e 49 bf 00 00 00 00 00 fc ff df 4c 8b a4 24 b8 00 00 00 0f 85 50 fb ff ff e8 7f f6 36 ff e9 46 fb ff ff <0f> 0b 0f 0b 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 55 48 89 e5
RSP: 0018:ffffc90000087060 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffffc90000087340 RCX: 1ffff92000010e6e
RDX: 0000000000000001 RSI: 0000000000000008 RDI: 0000000000000001
RBP: ffffc90000087470 R08: dffffc0000000000 R09: ffffed1021fcd82d
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000000
R13: 0000000000000000 R14: ffff88810fe6c1a0 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8881f7300000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005555574d3728 CR3: 000000010b6b1000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400