ci2 starts bisection 2023-04-24 23:31:07.34247657 +0000 UTC m=+41981.294785957 bisecting fixing commit since ceaa837f96adb69c0df0397937cd74991d5d821a building syzkaller on 957959cbd5c40f4e7be0c363495e34454cd2fde6 ensuring issue is reproducible on original commit ceaa837f96adb69c0df0397937cd74991d5d821a testing commit ceaa837f96adb69c0df0397937cd74991d5d821a gcc compiler: Debian clang version 15.0.7, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: 932aa8db1166a1f1ce02e0aacfb3ae5ca51b3968321da55808d2b2d37986f89a all runs: crashed: unregister_netdevice: waiting for DEV to become free testing current HEAD 61d325dcbc05d8fef88110d35ef7776f3ac3f68b testing commit 61d325dcbc05d8fef88110d35ef7776f3ac3f68b gcc compiler: Debian clang version 15.0.7, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: a1c47cf52aa2e2f0c4ed06c71ce76316ff29eed14635c862b10531369e58830c all runs: crashed: KASAN: use-after-free Read in reiserfs_find_entry revisions tested: 2, total time: 47m48.543508627s (build: 38m28.584730374s, test: 8m26.987710805s) the crash still happens on HEAD commit msg: Merge tag 'erofs-for-6.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/xiang/erofs crash: KASAN: use-after-free Read in reiserfs_find_entry 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 ================================================================== BUG: KASAN: use-after-free in strlen+0x58/0x70 lib/string.c:418 Read of size 1 at addr ffff88806d7620c4 by task syz-executor.0/5402 CPU: 1 PID: 5402 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: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x167/0x220 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:319 [inline] print_report+0x163/0x540 mm/kasan/report.c:430 kasan_report+0x176/0x1b0 mm/kasan/report.c:536 strlen+0x58/0x70 lib/string.c:418 set_de_name_and_namelen fs/reiserfs/namei.c:82 [inline] linear_search_in_dir_item fs/reiserfs/namei.c:262 [inline] reiserfs_find_entry+0x8c8/0x1a30 fs/reiserfs/namei.c:331 reiserfs_lookup+0x1ba/0x4c0 fs/reiserfs/namei.c:368 __lookup_slow+0x203/0x2f0 fs/namei.c:1686 lookup_one_len+0x208/0x250 fs/namei.c:2712 reiserfs_lookup_privroot+0x84/0x150 fs/reiserfs/xattr.c:976 reiserfs_fill_super+0x14eb/0x2070 fs/reiserfs/super.c:2192 mount_bdev+0x27f/0x370 fs/super.c:1380 legacy_get_tree+0xe9/0x170 fs/fs_context.c:610 vfs_get_tree+0x7f/0x220 fs/super.c:1510 do_new_mount+0x1e5/0x940 fs/namespace.c:3039 do_mount fs/namespace.c:3382 [inline] __do_sys_mount fs/namespace.c:3591 [inline] __se_sys_mount+0x232/0x2c0 fs/namespace.c:3568 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f6814a8d62a Code: 48 c7 c2 b8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff eb d2 e8 b8 04 00 00 0f 1f 84 00 00 00 00 00 49 89 ca b8 a5 00 00 00 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:00007f6813dfdf88 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000000001120 RCX: 00007f6814a8d62a RDX: 00000000200000c0 RSI: 0000000020000040 RDI: 00007f6813dfdfe0 RBP: 00007f6813dfe020 R08: 00007f6813dfe020 R09: 0000000000008001 R10: 0000000000008001 R11: 0000000000000246 R12: 00000000200000c0 R13: 0000000020000040 R14: 00007f6813dfdfe0 R15: 0000000020000300 The buggy address belongs to the physical page: page:ffffea0001b5d880 refcount:0 mapcount:0 mapping:0000000000000000 index:0x1 pfn:0x6d762 flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000000000 ffffea0001b5d8c8 ffffea0001b3db48 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 0x140cca(GFP_HIGHUSER_MOVABLE|__GFP_COMP), pid 5406, tgid 5406 (dhcpcd-run-hook), ts 75558897911, free_ts 75560567714 prep_new_page mm/page_alloc.c:2553 [inline] get_page_from_freelist+0x3246/0x33c0 mm/page_alloc.c:4326 __alloc_pages+0x255/0x670 mm/page_alloc.c:5592 __folio_alloc+0x13/0x30 mm/page_alloc.c:5624 vma_alloc_folio+0x308/0x680 mm/mempolicy.c:2238 wp_page_copy mm/memory.c:3068 [inline] do_wp_page+0x8d1/0x2600 mm/memory.c:3426 handle_pte_fault mm/memory.c:4941 [inline] __handle_mm_fault mm/memory.c:5065 [inline] handle_mm_fault+0x1fe0/0x3ce0 mm/memory.c:5211 do_user_addr_fault arch/x86/mm/fault.c:1407 [inline] handle_page_fault arch/x86/mm/fault.c:1498 [inline] exc_page_fault+0x5b1/0x7c0 arch/x86/mm/fault.c:1554 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1454 [inline] free_pcp_prepare mm/page_alloc.c:1504 [inline] free_unref_page_prepare+0xe2f/0xe70 mm/page_alloc.c:3388 free_unref_page_list+0x596/0x830 mm/page_alloc.c:3529 release_pages+0x1a0f/0x1bc0 mm/swap.c:1042 tlb_batch_pages_flush mm/mmu_gather.c:97 [inline] tlb_flush_mmu_free mm/mmu_gather.c:292 [inline] tlb_flush_mmu+0xe9/0x1e0 mm/mmu_gather.c:299 tlb_finish_mmu+0xb6/0x1c0 mm/mmu_gather.c:391 exit_mmap+0x358/0x7d0 mm/mmap.c:3081 __mmput+0xcb/0x300 kernel/fork.c:1208 exit_mm+0x1de/0x290 kernel/exit.c:563 do_exit+0x4f2/0x1d10 kernel/exit.c:856 do_group_exit+0x1b9/0x280 kernel/exit.c:1019 __do_sys_exit_group kernel/exit.c:1030 [inline] __se_sys_exit_group kernel/exit.c:1028 [inline] __x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1028 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd Memory state around the buggy address: ffff88806d761f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88806d762000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff >ffff88806d762080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ^ ffff88806d762100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff88806d762180: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ==================================================================