ci starts bisection 2023-05-07 08:36:12.659443391 +0000 UTC m=+99202.921095210
bisecting fixing commit since 0d1409e4ff08aa4a9a254d3f723410db32aa7552
building syzkaller on 67be1ae742603edad9c97d30b6ed69f9bbe2ffa8
ensuring issue is reproducible on original commit 0d1409e4ff08aa4a9a254d3f723410db32aa7552

testing commit 0d1409e4ff08aa4a9a254d3f723410db32aa7552 gcc
compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2
kernel signature: cb4115b42bd4921825b0e2109515fb547a5e6f9938ccf1d5c5dda6e801c6ca8e
run #0: crashed: KASAN: use-after-free Read in set_de_name_and_namelen
run #1: crashed: KASAN: use-after-free Read in set_de_name_and_namelen
run #2: crashed: KASAN: use-after-free Read in set_de_name_and_namelen
run #3: crashed: KASAN: use-after-free Read in set_de_name_and_namelen
run #4: crashed: KASAN: use-after-free Read in set_de_name_and_namelen
run #5: crashed: KASAN: use-after-free Read in set_de_name_and_namelen
run #6: crashed: KASAN: use-after-free Read in set_de_name_and_namelen
run #7: crashed: KASAN: use-after-free Read in set_de_name_and_namelen
run #8: crashed: KASAN: out-of-bounds Read in set_de_name_and_namelen
run #9: crashed: KASAN: use-after-free Read in set_de_name_and_namelen
run #10: crashed: KASAN: use-after-free Read in set_de_name_and_namelen
run #11: crashed: KASAN: out-of-bounds Read in set_de_name_and_namelen
run #12: crashed: KASAN: use-after-free Read in set_de_name_and_namelen
run #13: crashed: KASAN: use-after-free Read in set_de_name_and_namelen
run #14: crashed: KASAN: use-after-free Read in set_de_name_and_namelen
run #15: crashed: KASAN: out-of-bounds Read in set_de_name_and_namelen
run #16: crashed: KASAN: use-after-free Read in set_de_name_and_namelen
run #17: crashed: KASAN: use-after-free Read in set_de_name_and_namelen
run #18: crashed: KASAN: use-after-free Read in set_de_name_and_namelen
run #19: crashed: KASAN: use-after-free Read in set_de_name_and_namelen
testing current HEAD fc4354c6e5c21257cf4a50b32f7c11c7d65c55b3
testing commit fc4354c6e5c21257cf4a50b32f7c11c7d65c55b3 gcc
compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2
kernel signature: 3a6e687de6a0697cca5088d57a1853948e8621f58ff3131126744b4c5ac67f21
run #0: crashed: KASAN: use-after-free Read in set_de_name_and_namelen
run #1: crashed: KASAN: use-after-free Read in set_de_name_and_namelen
run #2: crashed: KASAN: out-of-bounds Read in set_de_name_and_namelen
run #3: crashed: KASAN: use-after-free Read in set_de_name_and_namelen
run #4: crashed: KASAN: use-after-free Read in set_de_name_and_namelen
run #5: crashed: KASAN: use-after-free Read in set_de_name_and_namelen
run #6: crashed: KASAN: use-after-free Read in set_de_name_and_namelen
run #7: crashed: KASAN: use-after-free Read in set_de_name_and_namelen
run #8: crashed: KASAN: use-after-free Read in set_de_name_and_namelen
run #9: crashed: KASAN: use-after-free Read in set_de_name_and_namelen
crash still not fixed/happens on the oldest tested release
revisions tested: 2, total time: 25m26.548318929s (build: 18m23.645851404s, test: 5m53.658297629s)
crash still not fixed on HEAD or HEAD had kernel test errors
commit msg: Merge tag 'mm-stable-2023-05-06-10-49' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
crash: KASAN: use-after-free Read in set_de_name_and_namelen
REISERFS (device loop0): journal params: device loop0, size 512, journal first block 18, max trans len 256, max batch 225, max commit age 30, max trans age 30
REISERFS (device loop0): checking transaction log (loop0)
REISERFS (device loop0): Using r5 hash to sort names
REISERFS (device loop0): Created .reiserfs_priv - reserved for xattr storage.
==================================================================
BUG: KASAN: use-after-free in strlen+0x7d/0xa0 lib/string.c:418
Read of size 1 at addr ffff88806e56e9cc by task syz-executor.0/5417

CPU: 1 PID: 5417 Comm: syz-executor.0 Not tainted 6.3.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/14/2023
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x64/0xb0 lib/dump_stack.c:106
 print_address_description.constprop.0+0x2c/0x3c0 mm/kasan/report.c:351
 print_report mm/kasan/report.c:462 [inline]
 kasan_report+0x11c/0x130 mm/kasan/report.c:572
 strlen+0x7d/0xa0 lib/string.c:418
 __fortify_strlen include/linux/fortify-string.h:241 [inline]
 set_de_name_and_namelen+0x47a/0x670 fs/reiserfs/namei.c:82
 search_by_entry_key+0x46a/0x980 fs/reiserfs/namei.c:172
 reiserfs_readdir_inode+0x22e/0x1320 fs/reiserfs/dir.c:98
 iterate_dir+0x47f/0x6c0 fs/readdir.c:65
 __do_sys_getdents64 fs/readdir.c:369 [inline]
 __se_sys_getdents64 fs/readdir.c:354 [inline]
 __x64_sys_getdents64+0x128/0x240 fs/readdir.c:354
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f780e28c0d9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 00 00 90 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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f780f010168 EFLAGS: 00000246 ORIG_RAX: 00000000000000d9
RAX: ffffffffffffffda RBX: 00007f780e3abf80 RCX: 00007f780e28c0d9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004
RBP: 00007f780e2e7ae9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffe025ec84f R14: 00007f780f010300 R15: 0000000000022000
 </TASK>

The buggy address belongs to the physical page:
page:ffffea0001b95b80 refcount:0 mapcount:0 mapping:0000000000000000 index:0x1 pfn:0x6e56e
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xffffffff()
raw: 00fff00000000000 ffffea0001b95bc8 ffffea0001b95b48 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 0x8(__GFP_MOVABLE), pid 1, tgid 1 (swapper/0), ts 5657512856, free_ts 6164807364
 split_map_pages+0x1bb/0x470 mm/compaction.c:97
 isolate_freepages_range+0x25e/0x2e0 mm/compaction.c:735
 alloc_contig_range+0x2fa/0x4a0 mm/page_alloc.c:6869
 __alloc_contig_pages mm/page_alloc.c:6892 [inline]
 alloc_contig_pages+0x361/0x4d0 mm/page_alloc.c:6972
 debug_vm_pgtable_alloc_huge_page mm/debug_vm_pgtable.c:1090 [inline]
 init_args mm/debug_vm_pgtable.c:1273 [inline]
 debug_vm_pgtable+0x6b2/0x31a0 mm/debug_vm_pgtable.c:1311
 do_one_initcall+0xc2/0x3c0 init/main.c:1246
 do_initcall_level init/main.c:1319 [inline]
 do_initcalls init/main.c:1335 [inline]
 do_basic_setup init/main.c:1354 [inline]
 kernel_init_freeable+0x541/0x950 init/main.c:1571
 kernel_init+0x1a/0x1c0 init/main.c:1462
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:24 [inline]
 free_pages_prepare mm/page_alloc.c:1302 [inline]
 free_unref_page_prepare+0x620/0xc80 mm/page_alloc.c:2564
 free_unref_page+0x33/0x370 mm/page_alloc.c:2659
 free_contig_range+0xb5/0x180 mm/page_alloc.c:6994
 destroy_args+0x50a/0x700 mm/debug_vm_pgtable.c:1023
 debug_vm_pgtable+0x18fd/0x31a0 mm/debug_vm_pgtable.c:1403
 do_one_initcall+0xc2/0x3c0 init/main.c:1246
 do_initcall_level init/main.c:1319 [inline]
 do_initcalls init/main.c:1335 [inline]
 do_basic_setup init/main.c:1354 [inline]
 kernel_init_freeable+0x541/0x950 init/main.c:1571
 kernel_init+0x1a/0x1c0 init/main.c:1462
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308

Memory state around the buggy address:
 ffff88806e56e880: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff88806e56e900: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
>ffff88806e56e980: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
                                              ^
 ffff88806e56ea00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff88806e56ea80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
==================================================================