| Date | Name | Commit | Repro | Result |
|---|---|---|---|---|
| 2025/02/13 | lts (merge base) | c16c81c81336 | C | [report] KASAN: use-after-free Read in do_split |
| 2025/02/13 | upstream (ToT) | 4dc1d1bec898 | C | Failed due to an error; will retry later |
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| Date | Name | Commit | Repro | Result |
|---|---|---|---|---|
| 2025/02/13 | lts (merge base) | c16c81c81336 | C | [report] KASAN: use-after-free Read in do_split |
| 2025/02/13 | upstream (ToT) | 4dc1d1bec898 | C | Failed due to an error; will retry later |
| Kernel | Title | Repro | Cause bisect | Fix bisect | Count | Last | Reported | Patched | Status |
|---|---|---|---|---|---|---|---|---|---|
| android-5-10 | BUG: unable to handle kernel paging request in do_split | C | error | 25 | 3d12h | 198d | 0/2 | upstream: reported C repro on 2024/08/09 00:52 | |
| linux-6.1 | KASAN: use-after-free Read in do_split | 1 | 107d | 107d | 0/3 | auto-obsoleted due to no activity on 2025/02/15 19:28 | |||
| upstream | BUG: unable to handle kernel paging request in do_split ext4 | C | inconclusive | 17 | 225d | 238d | 27/28 | fixed on 2024/08/14 03:44 |
================================================================== BUG: KASAN: slab-out-of-bounds in dx_insert_block fs/ext4/namei.c:1387 [inline] BUG: KASAN: slab-out-of-bounds in do_split+0x1f31/0x24e0 fs/ext4/namei.c:2080 Read of size 157024 at addr ffff88812dcf6028 by task syz.6.50/511 CPU: 1 PID: 511 Comm: syz.6.50 Not tainted 5.15.178-syzkaller-00193-g058abb720bd1 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024 Call Trace: <TASK> __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x151/0x1c0 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 kasan_check_range+0x293/0x2a0 mm/kasan/generic.c:189 memmove+0x2d/0x70 mm/kasan/shadow.c:54 dx_insert_block fs/ext4/namei.c:1387 [inline] do_split+0x1f31/0x24e0 fs/ext4/namei.c:2080 make_indexed_dir+0xeb7/0x15a0 fs/ext4/namei.c:2392 ext4_add_entry+0xde2/0x12b0 fs/ext4/namei.c:2504 __ext4_link+0x4e9/0x790 fs/ext4/namei.c:3536 ext4_link+0x1f3/0x290 fs/ext4/namei.c:3577 vfs_link+0x645/0x7f0 fs/namei.c:4557 do_linkat+0x34d/0x9f0 fs/namei.c:4628 __do_sys_link fs/namei.c:4662 [inline] __se_sys_link fs/namei.c:4660 [inline] __x64_sys_link+0x86/0x90 fs/namei.c:4660 x64_sys_call+0x282/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:87 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7f4a98645169 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f4a980b7038 EFLAGS: 00000246 ORIG_RAX: 0000000000000056 RAX: ffffffffffffffda RBX: 00007f4a9885dfa0 RCX: 00007f4a98645169 RDX: 0000000000000000 RSI: 0000400000000bc0 RDI: 0000400000001240 RBP: 00007f4a986c62a0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f4a9885dfa0 R15: 00007fff1d78ba38 </TASK> The buggy address belongs to the page: page:ffffea0004b73d80 refcount:3 mapcount:1 mapping:ffff888109302c98 index:0x1 pfn:0x12dcf6 memcg:ffff88810024c000 aops:def_blk_aops ino:700006 flags: 0x400000000032201e(referenced|uptodate|dirty|lru|private|mappedtodisk|unevictable|mlocked|zone=1) raw: 400000000032201e ffff888100244040 ffffea0004b73d08 ffff888109302c98 raw: 0000000000000001 ffff8881004fef18 0000000300000000 ffff88810024c000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 0, migratetype Unmovable, gfp_mask 0x112c40(GFP_NOFS|__GFP_NOWARN|__GFP_NORETRY|__GFP_HARDWALL), pid 471, ts 38028918242, free_ts 38013344233 set_page_owner include/linux/page_owner.h:33 [inline] post_alloc_hook+0x1a3/0x1b0 mm/page_alloc.c:2605 prep_new_page+0x1b/0x110 mm/page_alloc.c:2611 get_page_from_freelist+0x3550/0x35d0 mm/page_alloc.c:4485 __alloc_pages+0x27e/0x8f0 mm/page_alloc.c:5780 __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] page_cache_ra_unbounded+0x334/0xa50 mm/readahead.c:227 do_page_cache_ra mm/readahead.c:280 [inline] force_page_cache_ra+0x3c0/0x420 mm/readahead.c:312 page_cache_sync_ra+0x2d5/0x4d0 mm/readahead.c:590 page_cache_sync_readahead include/linux/pagemap.h:831 [inline] filemap_get_pages mm/filemap.c:2560 [inline] filemap_read+0x785/0x2490 mm/filemap.c:2644 generic_file_read_iter+0xae/0x420 mm/filemap.c:2804 blkdev_read_iter+0x135/0x190 block/fops.c:560 call_read_iter include/linux/fs.h:2200 [inline] new_sync_read fs/read_write.c:404 [inline] vfs_read+0xa81/0xd40 fs/read_write.c:485 ksys_read+0x199/0x2c0 fs/read_write.c:623 __do_sys_read fs/read_write.c:633 [inline] __se_sys_read fs/read_write.c:631 [inline] __x64_sys_read+0x7b/0x90 fs/read_write.c:631 x64_sys_call+0x28/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:1 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 page last free stack trace: reset_page_owner include/linux/page_owner.h:26 [inline] free_pages_prepare mm/page_alloc.c:1472 [inline] free_pcp_prepare mm/page_alloc.c:1544 [inline] free_unref_page_prepare+0x7c8/0x7d0 mm/page_alloc.c:3534 free_unref_page+0xe8/0x750 mm/page_alloc.c:3616 free_the_page mm/page_alloc.c:805 [inline] __free_pages+0x61/0xf0 mm/page_alloc.c:5856 __free_slab+0xec/0x1d0 mm/slub.c:2020 free_slab mm/slub.c:2035 [inline] discard_slab mm/slub.c:2041 [inline] __unfreeze_partials+0x165/0x1a0 mm/slub.c:2527 put_cpu_partial+0xc4/0x120 mm/slub.c:2607 __slab_free+0x1c8/0x290 mm/slub.c:3390 do_slab_free mm/slub.c:3509 [inline] ___cache_free+0x109/0x120 mm/slub.c:3530 qlink_free+0x4d/0x90 mm/kasan/quarantine.c:157 qlist_free_all+0x44/0xb0 mm/kasan/quarantine.c:176 kasan_quarantine_reduce+0x15a/0x180 mm/kasan/quarantine.c:283 __kasan_slab_alloc+0x2f/0xe0 mm/kasan/common.c:443 kasan_slab_alloc include/linux/kasan.h:217 [inline] slab_post_alloc_hook+0x53/0x2c0 mm/slab.h:550 slab_alloc_node mm/slub.c:3240 [inline] slab_alloc mm/slub.c:3250 [inline] kmem_cache_alloc+0xf5/0x250 mm/slub.c:3255 getname_flags+0xba/0x520 fs/namei.c:138 getname+0x19/0x20 fs/namei.c:217 Memory state around the buggy address: ffff88812dcf7f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88812dcf8000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff88812dcf8080: 00 fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 ^ ffff88812dcf8100: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc ffff88812dcf8180: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ================================================================== EXT4-fs error (device loop6): ext4_dx_csum_set:531: inode #2: comm syz.6.50: dir seems corrupt? Run e2fsck -D.