ci2 starts bisection 2023-06-01 04:12:12.503954892 +0000 UTC m=+30358.620079525 bisecting fixing commit since f48aeeaaa64c628519273f6007a745cf55b68d95 building syzkaller on 62df2017e3b1edd786a4c737bd4ccba2b4581d88 ensuring issue is reproducible on original commit f48aeeaaa64c628519273f6007a745cf55b68d95 testing commit f48aeeaaa64c628519273f6007a745cf55b68d95 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: 017f5febc402d10cabd5449365bbce23ae764f4f2aae94afd90ccd7a254a00a6 run #0: crashed: KASAN: use-after-free Read in reiserfs_readdir_inode run #1: crashed: KASAN: use-after-free Read in reiserfs_readdir_inode run #2: crashed: KASAN: use-after-free Read in reiserfs_readdir_inode run #3: crashed: KASAN: use-after-free Read in reiserfs_readdir_inode run #4: crashed: KASAN: use-after-free Read in reiserfs_readdir_inode run #5: crashed: KASAN: use-after-free Read in reiserfs_readdir_inode run #6: crashed: KASAN: use-after-free Read in reiserfs_readdir_inode run #7: crashed: KASAN: out-of-bounds Read in reiserfs_readdir_inode run #8: crashed: KASAN: out-of-bounds Read in reiserfs_readdir_inode run #9: crashed: KASAN: use-after-free Read in reiserfs_readdir_inode run #10: crashed: KASAN: use-after-free Read in reiserfs_readdir_inode run #11: crashed: KASAN: use-after-free Read in reiserfs_readdir_inode run #12: crashed: KASAN: out-of-bounds Read in reiserfs_readdir_inode run #13: crashed: KASAN: use-after-free Read in reiserfs_readdir_inode run #14: crashed: KASAN: use-after-free Read in reiserfs_readdir_inode run #15: crashed: KASAN: use-after-free Read in reiserfs_readdir_inode run #16: crashed: KASAN: use-after-free Read in reiserfs_readdir_inode run #17: crashed: KASAN: use-after-free Read in reiserfs_readdir_inode run #18: crashed: KASAN: out-of-bounds Read in reiserfs_readdir_inode run #19: crashed: KASAN: use-after-free Read in reiserfs_readdir_inode testing current HEAD 0ab06468cbd149aac0d7f216ec00452ff8c74e0b testing commit 0ab06468cbd149aac0d7f216ec00452ff8c74e0b gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: 1b6714e850ff280c3ec949638a26588260c78cba7111b6989b6cd7df353a8c77 run #0: crashed: KASAN: out-of-bounds Read in reiserfs_readdir_inode run #1: crashed: KASAN: use-after-free Read in reiserfs_readdir_inode run #2: crashed: KASAN: use-after-free Read in reiserfs_readdir_inode run #3: crashed: KASAN: use-after-free Read in reiserfs_readdir_inode run #4: crashed: KASAN: out-of-bounds Read in reiserfs_readdir_inode run #5: crashed: KASAN: use-after-free Read in reiserfs_readdir_inode run #6: crashed: KASAN: use-after-free Read in reiserfs_readdir_inode run #7: crashed: KASAN: use-after-free Read in reiserfs_readdir_inode run #8: crashed: KASAN: use-after-free Read in reiserfs_readdir_inode run #9: crashed: KASAN: use-after-free Read in reiserfs_readdir_inode crash still not fixed/happens on the oldest tested release revisions tested: 2, total time: 32m48.508083245s (build: 25m12.796466249s, test: 6m58.687531971s) crash still not fixed on HEAD or HEAD had kernel test errors commit msg: Linux 5.15.114 crash: KASAN: use-after-free Read in reiserfs_readdir_inode 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 instrument_atomic_read include/linux/instrumented.h:71 [inline] BUG: KASAN: use-after-free in test_bit include/asm-generic/bitops/instrumented-non-atomic.h:134 [inline] BUG: KASAN: use-after-free in test_bit_le include/asm-generic/bitops/le.h:85 [inline] BUG: KASAN: use-after-free in reiserfs_readdir_inode+0xa13/0x1330 fs/reiserfs/dir.c:147 Read of size 8 at addr ffff88806a29e000 by task syz-executor.0/4150 CPU: 1 PID: 4150 Comm: syz-executor.0 Not tainted 5.15.114-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/25/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x57/0x7d lib/dump_stack.c:106 print_address_description.constprop.0.cold+0x6c/0x309 mm/kasan/report.c:248 __kasan_report mm/kasan/report.c:434 [inline] kasan_report.cold+0x83/0xdf mm/kasan/report.c:451 check_region_inline mm/kasan/generic.c:183 [inline] kasan_check_range+0x13d/0x180 mm/kasan/generic.c:189 instrument_atomic_read include/linux/instrumented.h:71 [inline] test_bit include/asm-generic/bitops/instrumented-non-atomic.h:134 [inline] test_bit_le include/asm-generic/bitops/le.h:85 [inline] reiserfs_readdir_inode+0xa13/0x1330 fs/reiserfs/dir.c:147 iterate_dir+0x487/0x6d0 fs/readdir.c:65 __do_sys_getdents64 fs/readdir.c:369 [inline] __se_sys_getdents64 fs/readdir.c:354 [inline] __x64_sys_getdents64+0x124/0x240 fs/readdir.c:354 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x61/0xcb RIP: 0033:0x7fc6624d6169 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:00007fc661848168 EFLAGS: 00000246 ORIG_RAX: 00000000000000d9 RAX: ffffffffffffffda RBX: 00007fc6625f5f80 RCX: 00007fc6624d6169 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004 RBP: 00007fc662531ca1 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffcbb7f003f R14: 00007fc661848300 R15: 0000000000022000 The buggy address belongs to the page: page:ffffea0001a8a780 refcount:0 mapcount:0 mapping:0000000000000000 index:0x1 pfn:0x6a29e flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000000000 ffffea0001aa2908 ffffea0001a8a908 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 0x1100cca(GFP_HIGHUSER_MOVABLE), pid 4160, ts 67207506618, free_ts 67209734911 prep_new_page mm/page_alloc.c:2426 [inline] get_page_from_freelist+0xa76/0x2f80 mm/page_alloc.c:4159 __alloc_pages+0x1b2/0x470 mm/page_alloc.c:5421 alloc_pages_vma+0xed/0x6b0 mm/mempolicy.c:2146 wp_page_copy+0x18e/0x1c90 mm/memory.c:3016 handle_pte_fault mm/memory.c:4626 [inline] __handle_mm_fault+0x1a9d/0x41e0 mm/memory.c:4743 handle_mm_fault+0x166/0x5e0 mm/memory.c:4841 do_user_addr_fault+0x2dc/0xcd0 arch/x86/mm/fault.c:1397 handle_page_fault arch/x86/mm/fault.c:1485 [inline] exc_page_fault+0x5a/0xc0 arch/x86/mm/fault.c:1541 asm_exc_page_fault+0x22/0x30 arch/x86/include/asm/idtentry.h:568 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1340 [inline] free_pcp_prepare+0x2c5/0x780 mm/page_alloc.c:1391 free_unref_page_prepare mm/page_alloc.c:3317 [inline] free_unref_page_list+0x16f/0xf40 mm/page_alloc.c:3433 release_pages+0xbe3/0x14c0 mm/swap.c:963 tlb_batch_pages_flush mm/mmu_gather.c:49 [inline] tlb_flush_mmu_free mm/mmu_gather.c:240 [inline] tlb_flush_mmu mm/mmu_gather.c:247 [inline] tlb_finish_mmu+0x127/0x790 mm/mmu_gather.c:338 exit_mmap+0x1b7/0x540 mm/mmap.c:3188 __mmput+0xed/0x430 kernel/fork.c:1118 exit_mm kernel/exit.c:548 [inline] do_exit+0x91f/0x2400 kernel/exit.c:859 do_group_exit+0xe7/0x290 kernel/exit.c:994 __do_sys_exit_group kernel/exit.c:1005 [inline] __se_sys_exit_group kernel/exit.c:1003 [inline] __x64_sys_exit_group+0x35/0x40 kernel/exit.c:1003 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x61/0xcb Memory state around the buggy address: ffff88806a29df00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88806a29df80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff88806a29e000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ^ ffff88806a29e080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff88806a29e100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ==================================================================