ci2 starts bisection 2023-02-06 05:47:33.255031864 +0000 UTC m=+143417.853354340 bisecting fixing commit since c3eb11fbb826879be773c137f281569efce67aa8 building syzkaller on 74a66371788c1eb22bde25c9c422c7754596d7f5 ensuring issue is reproducible on original commit c3eb11fbb826879be773c137f281569efce67aa8 testing commit c3eb11fbb826879be773c137f281569efce67aa8 gcc compiler: Debian clang version 15.0.7, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: c2aa483dfd2273970b6c1850125892dba070dca689b987557202588cbcde13fb 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: use-after-free 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: use-after-free 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: use-after-free 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: out-of-bounds 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 d2d11f342b179f1894a901f143ec7c008caba43e testing commit d2d11f342b179f1894a901f143ec7c008caba43e gcc compiler: Debian clang version 15.0.7, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: 12aacafb0226ff24e9c8efeb923019cb7119270412acccb39a954b9408dd867b all runs: crashed: KASAN: use-after-free Read in set_de_name_and_namelen revisions tested: 2, total time: 40m20.715612564s (build: 31m0.494798293s, test: 6m41.220277782s) the crash still happens on HEAD commit msg: Merge branch 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 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+0x58/0x70 Read of size 1 at addr ffff88806f8379cc by task syz-executor.0/5598 CPU: 1 PID: 5598 Comm: syz-executor.0 Not tainted 6.2.0-rc7-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023 Call Trace: dump_stack_lvl+0x12e/0x1d0 print_report+0x163/0x4c0 kasan_report+0xce/0x100 strlen+0x58/0x70 set_de_name_and_namelen+0x37b/0x610 search_by_entry_key+0x5ab/0xc00 reiserfs_readdir_inode+0x24d/0x1440 iterate_dir+0x1fe/0x500 __se_sys_getdents64+0x1ce/0x420 do_syscall_64+0x41/0xc0 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7fec29c8c0d9 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:00007fec2aa00168 EFLAGS: 00000246 ORIG_RAX: 00000000000000d9 RAX: ffffffffffffffda RBX: 00007fec29dabf80 RCX: 00007fec29c8c0d9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004 RBP: 00007fec29ce7ae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffd01aa910f R14: 00007fec2aa00300 R15: 0000000000022000 The buggy address belongs to the physical page: page:ffffea0001be0dc0 refcount:0 mapcount:0 mapping:0000000000000000 index:0x1 pfn:0x6f837 flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000000000 ffffea0001be0e08 ffffea0001be0d88 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 0x140dca(GFP_HIGHUSER_MOVABLE|__GFP_COMP|__GFP_ZERO), pid 5596, tgid 5596 (sed), ts 74772327334, free_ts 74776072189 get_page_from_freelist+0x3403/0x3580 __alloc_pages+0x291/0x7e0 __folio_alloc+0x13/0x30 vma_alloc_folio+0x308/0x680 handle_mm_fault+0x2891/0x3d90 exc_page_fault+0x66a/0x880 asm_exc_page_fault+0x26/0x30 page last free stack trace: free_unref_page_prepare+0xf3a/0x1040 free_unref_page_list+0x6b1/0x950 release_pages+0x1a07/0x1bc0 tlb_flush_mmu+0xe9/0x1e0 tlb_finish_mmu+0xb6/0x1c0 exit_mmap+0x264/0x740 __mmput+0xcb/0x300 exit_mm+0x1c4/0x280 do_exit+0x48d/0x1ca0 do_group_exit+0x1b9/0x280 __x64_sys_exit_group+0x3f/0x40 do_syscall_64+0x41/0xc0 entry_SYSCALL_64_after_hwframe+0x63/0xcd Memory state around the buggy address: ffff88806f837880: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff88806f837900: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff >ffff88806f837980: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ^ ffff88806f837a00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff88806f837a80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ==================================================================