ci2 starts bisection 2023-11-01 09:38:22.974392213 +0000 UTC m=+22790.150663921 bisecting fixing commit since ca87e77a2ef8b298aa9f69658d5898e72ee450fe building syzkaller on f3921d4d63f97d1f1fb49a69ea85744bb7ef184b ensuring issue is reproducible on original commit ca87e77a2ef8b298aa9f69658d5898e72ee450fe testing commit ca87e77a2ef8b298aa9f69658d5898e72ee450fe gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 8e8ce50f419df133040ce77bc07eb17e0b6d3fde6f6c4b3a5566b87c48d185bf run #0: crashed: KASAN: use-after-free Read in ext4_search_dir run #1: crashed: KASAN: use-after-free Read in ext4_search_dir run #2: crashed: KASAN: use-after-free Read in ext4_search_dir run #3: crashed: KASAN: slab-out-of-bounds Read in ext4_search_dir run #4: crashed: KASAN: use-after-free Read in ext4_search_dir run #5: crashed: KASAN: use-after-free Read in ext4_search_dir run #6: crashed: KASAN: use-after-free Read in ext4_search_dir run #7: crashed: KASAN: use-after-free Read in ext4_search_dir run #8: crashed: KASAN: use-after-free Read in ext4_search_dir run #9: crashed: KASAN: use-after-free Read in ext4_search_dir run #10: crashed: KASAN: use-after-free Read in ext4_search_dir run #11: crashed: KASAN: use-after-free Read in ext4_search_dir run #12: crashed: KASAN: use-after-free Read in ext4_search_dir run #13: crashed: KASAN: use-after-free Read in ext4_search_dir run #14: crashed: KASAN: use-after-free Read in ext4_search_dir run #15: crashed: KASAN: use-after-free Read in ext4_search_dir run #16: crashed: KASAN: use-after-free Read in ext4_search_dir run #17: crashed: KASAN: use-after-free Read in ext4_search_dir run #18: crashed: KASAN: use-after-free Read in ext4_search_dir run #19: crashed: KASAN: use-after-free Read in ext4_search_dir representative crash: KASAN: use-after-free Read in ext4_search_dir, types: [KASAN] check whether we can drop unnecessary instrumentation disabling configs for [LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN BUG], they are not needed testing commit ca87e77a2ef8b298aa9f69658d5898e72ee450fe gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 0ff1aa08a60a95fdc1769a913f410135a433c82a28f5b43a627182b1444a0630 run #0: crashed: KASAN: use-after-free Read in ext4_search_dir run #1: crashed: KASAN: use-after-free Read in ext4_search_dir run #2: crashed: KASAN: out-of-bounds Read in ext4_search_dir run #3: crashed: KASAN: use-after-free Read in ext4_search_dir run #4: crashed: KASAN: use-after-free Read in ext4_search_dir run #5: crashed: KASAN: use-after-free Read in ext4_search_dir run #6: crashed: KASAN: use-after-free Read in ext4_search_dir run #7: crashed: KASAN: slab-out-of-bounds Read in ext4_search_dir run #8: crashed: KASAN: use-after-free Read in ext4_search_dir run #9: crashed: KASAN: use-after-free Read in ext4_search_dir representative crash: KASAN: use-after-free Read in ext4_search_dir, types: [KASAN] the bug reproduces without the instrumentation disabling configs for [LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN BUG], they are not needed kconfig minimization: base=3820 full=7523 leaves diff=1995 split chunks (needed=false): <1995> split chunk #0 of len 1995 into 5 parts testing without sub-chunk 1/5 disabling configs for [LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN BUG], they are not needed testing commit ca87e77a2ef8b298aa9f69658d5898e72ee450fe gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 4ae687b76e0961fc715472a9f2b4f2de5d365605c8f1693a0a5623a6f8c63b9c run #0: crashed: KASAN: use-after-free Read in ext4_search_dir run #1: crashed: KASAN: use-after-free Read in ext4_search_dir run #2: crashed: KASAN: use-after-free Read in ext4_search_dir run #3: crashed: KASAN: slab-out-of-bounds Read in ext4_search_dir run #4: crashed: KASAN: use-after-free Read in ext4_search_dir run #5: crashed: KASAN: use-after-free Read in ext4_search_dir run #6: crashed: KASAN: use-after-free Read in ext4_search_dir run #7: crashed: KASAN: use-after-free Read in ext4_search_dir run #8: crashed: KASAN: use-after-free Read in ext4_search_dir run #9: crashed: KASAN: use-after-free Read in ext4_search_dir representative crash: KASAN: use-after-free Read in ext4_search_dir, types: [KASAN] the chunk can be dropped testing without sub-chunk 2/5 disabling configs for [LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN BUG], they are not needed testing commit ca87e77a2ef8b298aa9f69658d5898e72ee450fe gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: eb8def0bbc683ec1eb63c64fa2a29c6775398cfd21571f500fb788698aed2d50 run #0: crashed: KASAN: use-after-free Read in ext4_search_dir run #1: crashed: KASAN: use-after-free Read in ext4_search_dir run #2: crashed: KASAN: use-after-free Read in ext4_search_dir run #3: crashed: KASAN: use-after-free Read in ext4_search_dir run #4: crashed: KASAN: use-after-free Read in ext4_search_dir run #5: crashed: KASAN: use-after-free Read in ext4_search_dir run #6: crashed: KASAN: use-after-free Read in ext4_search_dir run #7: crashed: KASAN: use-after-free Read in ext4_search_dir run #8: boot failed: can't ssh into the instance run #9: boot failed: can't ssh into the instance representative crash: KASAN: use-after-free Read in ext4_search_dir, types: [KASAN] the chunk can be dropped testing without sub-chunk 3/5 disabling configs for [ATOMIC_SLEEP HANG LEAK UBSAN BUG LOCKDEP], they are not needed testing commit ca87e77a2ef8b298aa9f69658d5898e72ee450fe gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 48ebf24be909ccc473df104410f0883ca7ae496b76b94afec6f544a8b67321b7 run #0: crashed: KASAN: use-after-free Read in ext4_search_dir run #1: crashed: KASAN: use-after-free Read in ext4_search_dir run #2: crashed: KASAN: use-after-free Read in ext4_search_dir run #3: crashed: KASAN: use-after-free Read in ext4_search_dir run #4: crashed: KASAN: use-after-free Read in ext4_search_dir run #5: crashed: KASAN: use-after-free Read in ext4_search_dir run #6: crashed: KASAN: use-after-free Read in ext4_search_dir run #7: crashed: KASAN: slab-out-of-bounds Read in ext4_search_dir run #8: crashed: KASAN: use-after-free Read in ext4_search_dir run #9: crashed: KASAN: use-after-free Read in ext4_search_dir representative crash: KASAN: use-after-free Read in ext4_search_dir, types: [KASAN] the chunk can be dropped testing without sub-chunk 4/5 disabling configs for [LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN BUG], they are not needed testing commit ca87e77a2ef8b298aa9f69658d5898e72ee450fe gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 91820eba49cb7672af1efbce63a488ae4bd5880b76068c2b25ad6f6eb40e679b run #0: crashed: KASAN: slab-out-of-bounds Read in ext4_search_dir run #1: crashed: KASAN: use-after-free Read in ext4_search_dir run #2: crashed: KASAN: use-after-free Read in ext4_search_dir run #3: crashed: KASAN: use-after-free Read in ext4_search_dir run #4: crashed: KASAN: use-after-free Read in ext4_search_dir run #5: crashed: KASAN: use-after-free Read in ext4_search_dir run #6: crashed: KASAN: slab-out-of-bounds Read in ext4_search_dir run #7: crashed: KASAN: use-after-free Read in ext4_search_dir run #8: crashed: KASAN: slab-out-of-bounds Read in ext4_search_dir run #9: crashed: KASAN: use-after-free Read in ext4_search_dir representative crash: KASAN: slab-out-of-bounds Read in ext4_search_dir, types: [KASAN] the chunk can be dropped testing without sub-chunk 5/5 disabling configs for [HANG LEAK UBSAN BUG LOCKDEP ATOMIC_SLEEP], they are not needed testing commit ca87e77a2ef8b298aa9f69658d5898e72ee450fe gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 8017ff7f03d02a2b7e224298830d9dc828f76a4e339b967ef481985c996a6b05 all runs: crashed: KASAN: use-after-free Read in ext4_search_dir representative crash: KASAN: use-after-free Read in ext4_search_dir, types: [KASAN] the chunk can be dropped disabling configs for [HANG LEAK UBSAN BUG LOCKDEP ATOMIC_SLEEP], they are not needed testing current HEAD 32c9cdbe383c153af23cfa1df0a352b97ab3df7a testing commit 32c9cdbe383c153af23cfa1df0a352b97ab3df7a gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 0bdea7cabbe46c270ac82054e3679d678b0a700b6b4975ba3bdec8f25d993adc all runs: crashed: KASAN: use-after-free Read in ext4_search_dir representative crash: KASAN: use-after-free Read in ext4_search_dir, types: [KASAN] crash still not fixed/happens on the oldest tested release revisions tested: 8, total time: 1h22m48.168736823s (build: 39m37.724980398s, test: 32m49.10940907s) crash still not fixed or there were kernel test errors commit msg: Linux 6.1.60 crash: KASAN: use-after-free Read in ext4_search_dir EXT4-fs: Ignoring removed bh option EXT4-fs (loop0): mounting ext3 file system using the ext4 subsystem EXT4-fs (loop0): 1 truncate cleaned up EXT4-fs (loop0): mounted filesystem without journal. Quota mode: none. ================================================================== BUG: KASAN: use-after-free in ext4_search_dir+0x148/0x250 fs/ext4/namei.c:1543 Read of size 1 at addr ffff8881257333ed by task syz-executor.0/1506 CPU: 1 PID: 1506 Comm: syz-executor.0 Not tainted 6.1.60-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xf4/0x251 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:284 [inline] print_report+0x15f/0x4f0 mm/kasan/report.c:395 kasan_report+0x136/0x160 mm/kasan/report.c:495 ext4_search_dir+0x148/0x250 fs/ext4/namei.c:1543 ext4_find_inline_entry+0x367/0x540 fs/ext4/inline.c:1722 __ext4_find_entry+0x2dc/0x1a10 fs/ext4/namei.c:1616 ext4_lookup_entry fs/ext4/namei.c:1771 [inline] ext4_lookup+0x1ab/0x5f0 fs/ext4/namei.c:1839 lookup_open fs/namei.c:3392 [inline] open_last_lookups fs/namei.c:3482 [inline] path_openat+0xdb6/0x2410 fs/namei.c:3712 do_filp_open+0x226/0x430 fs/namei.c:3742 do_sys_openat2+0x10b/0x420 fs/open.c:1318 do_sys_open fs/open.c:1334 [inline] __do_sys_open fs/open.c:1342 [inline] __se_sys_open fs/open.c:1338 [inline] __x64_sys_open+0x1eb/0x240 fs/open.c:1338 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0x80 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f1283f87b29 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 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 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f1283b0a0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 00007f12840a6f80 RCX: 00007f1283f87b29 RDX: 0000000000000000 RSI: 0000000000141042 RDI: 0000000020000100 RBP: 00007f1283fd347a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000006 R14: 00007f12840a6f80 R15: 00007ffed570b248 The buggy address belongs to the physical page: page:ffffea000495ccc0 refcount:0 mapcount:0 mapping:0000000000000000 index:0x1 pfn:0x125733 flags: 0x200000000000000(node=0|zone=2) raw: 0200000000000000 ffffea000495cd08 ffffea000495cc88 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 1379, tgid 1379 (modprobe), ts 52914120111, free_ts 52923551954 set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook+0x286/0x2b0 mm/page_alloc.c:2513 prep_new_page mm/page_alloc.c:2520 [inline] get_page_from_freelist+0x2ba7/0x2de0 mm/page_alloc.c:4279 __alloc_pages+0x251/0x640 mm/page_alloc.c:5545 vma_alloc_folio+0x689/0x870 mm/mempolicy.c:2241 alloc_page_vma include/linux/gfp.h:284 [inline] wp_page_copy+0x1e6/0x1610 mm/memory.c:3134 handle_pte_fault mm/memory.c:5011 [inline] __handle_mm_fault mm/memory.c:5135 [inline] handle_mm_fault+0x91a/0x2bf0 mm/memory.c:5256 do_user_addr_fault arch/x86/mm/fault.c:1380 [inline] handle_page_fault arch/x86/mm/fault.c:1471 [inline] exc_page_fault+0x22a/0x5e0 arch/x86/mm/fault.c:1527 asm_exc_page_fault+0x22/0x30 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:1440 [inline] free_pcp_prepare mm/page_alloc.c:1490 [inline] free_unref_page_prepare+0xca9/0xd80 mm/page_alloc.c:3358 free_unref_page_list+0xaa/0x690 mm/page_alloc.c:3499 release_pages+0x1763/0x1900 mm/swap.c:1055 tlb_batch_pages_flush mm/mmu_gather.c:59 [inline] tlb_flush_mmu_free mm/mmu_gather.c:254 [inline] tlb_flush_mmu+0x26f/0x3d0 mm/mmu_gather.c:261 tlb_finish_mmu+0xb0/0x1b0 mm/mmu_gather.c:361 exit_mmap+0x311/0x700 mm/mmap.c:3226 __mmput+0x61/0x290 kernel/fork.c:1199 exit_mm+0x122/0x1b0 kernel/exit.c:563 do_exit+0x81e/0x23a0 kernel/exit.c:856 do_group_exit+0x1b5/0x280 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+0x3b/0x40 kernel/exit.c:1028 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0x80 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd Memory state around the buggy address: ffff888125733280: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff888125733300: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff >ffff888125733380: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ^ ffff888125733400: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff888125733480: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ==================================================================