ci2 starts bisection 2023-04-07 07:10:52.339922639 +0000 UTC m=+37703.917425034 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: 3032165c5f11bff60c33dda58561d592e4453b3ca96df6ecaee47e34745ae9b8 all runs: crashed: KASAN: use-after-free Read in set_de_name_and_namelen testing current HEAD f2afccfefe7be1f7346564fe619277110d341f9b testing commit f2afccfefe7be1f7346564fe619277110d341f9b gcc compiler: Debian clang version 15.0.7, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: f55ffa62196c32c2d7cad6349aa6081651de013e9f725266594503902998a357 run #0: crashed: KASAN: use-after-free Read in set_de_name_and_namelen run #1: crashed: KASAN: out-of-bounds 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 revisions tested: 2, total time: 46m59.616420792s (build: 38m47.53625491s, test: 6m3.744757624s) the crash still happens on HEAD commit msg: Merge tag 'net-6.3-rc6-2' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net crash: KASAN: use-after-free Read in set_de_name_and_namelen 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 ffff88806dc729cc by task syz-executor.0/5588 CPU: 1 PID: 5588 Comm: syz-executor.0 Not tainted 6.3.0-rc5-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/30/2023 Call Trace: dump_stack_lvl+0x12e/0x1d0 print_report+0x163/0x510 kasan_report+0x108/0x140 strlen+0x58/0x70 set_de_name_and_namelen+0x37b/0x610 search_by_entry_key+0x5ab/0xc00 reiserfs_readdir_inode+0x23a/0x1300 iterate_dir+0x1fe/0x500 __se_sys_getdents64+0x1ce/0x420 do_syscall_64+0x41/0xc0 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7fc028e8c0d9 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:00007fc029b82168 EFLAGS: 00000246 ORIG_RAX: 00000000000000d9 RAX: ffffffffffffffda RBX: 00007fc028fabf80 RCX: 00007fc028e8c0d9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004 RBP: 00007fc028ee7ae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffc2d2dd82f R14: 00007fc029b82300 R15: 0000000000022000 The buggy address belongs to the physical page: page:ffffea0001b71c80 refcount:0 mapcount:0 mapping:0000000000000000 index:0x1 pfn:0x6dc72 flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000000000 ffffea0001b71cc8 ffffea0001b71c48 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 5443, tgid 5443 (syz-execprog), ts 67396589360, free_ts 69776130053 get_page_from_freelist+0x31e9/0x3360 __alloc_pages+0x255/0x670 __folio_alloc+0x13/0x30 vma_alloc_folio+0x308/0x680 handle_mm_fault+0x2afa/0x3d50 exc_page_fault+0x5a4/0x7b0 asm_exc_page_fault+0x26/0x30 page last free stack trace: free_unref_page_prepare+0xe2f/0xe70 free_unref_page_list+0x596/0x830 release_pages+0x1a07/0x1bc0 tlb_flush_mmu+0xe9/0x1e0 tlb_finish_mmu+0xb6/0x1c0 zap_page_range_single+0x3a0/0x460 do_madvise+0x82d/0x3420 __x64_sys_madvise+0xa0/0xb0 do_syscall_64+0x41/0xc0 entry_SYSCALL_64_after_hwframe+0x63/0xcd Memory state around the buggy address: ffff88806dc72880: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff88806dc72900: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff >ffff88806dc72980: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ^ ffff88806dc72a00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff88806dc72a80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ==================================================================