ci2 starts bisection 2023-05-30 18:25:55.028541311 +0000 UTC m=+9411.398947819 bisecting fixing commit since 534293368afa1a953c283310b82e4dc58309d51e building syzkaller on 7939252e4ddf50bbb9912069a40d32f6c83c4f8e ensuring issue is reproducible on original commit 534293368afa1a953c283310b82e4dc58309d51e testing commit 534293368afa1a953c283310b82e4dc58309d51e gcc compiler: Debian clang version 15.0.7, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: eefcf66aba850755a1eb052c47070d9aad7eacce48ca271f6e0e5bc67539e8bd all runs: crashed: KASAN: use-after-free Read in reiserfs_readdir_inode testing current HEAD 8b817fded42d8fe3a0eb47b1149d907851a3c942 testing commit 8b817fded42d8fe3a0eb47b1149d907851a3c942 gcc compiler: Debian clang version 15.0.7, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: 94cc788e30d43e1261eb203f41bc7b17f8e1dc0c481ab1012d4882ee3cb5b405 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: out-of-bounds Read in reiserfs_readdir_inode run #3: crashed: KASAN: out-of-bounds 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: 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: 46m7.275040225s (build: 38m13.332392176s, test: 6m40.652904751s) crash still not fixed on HEAD or HEAD had kernel test errors commit msg: Merge tag 'trace-v6.4-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace 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:68 [inline] BUG: KASAN: use-after-free in _test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline] BUG: KASAN: use-after-free in test_bit_le include/asm-generic/bitops/le.h:21 [inline] BUG: KASAN: use-after-free in reiserfs_readdir_inode+0x5a4/0x1490 fs/reiserfs/dir.c:147 Read of size 8 at addr ffff88807001c000 by task syz-executor.0/5429 CPU: 1 PID: 5429 Comm: syz-executor.0 Not tainted 6.4.0-rc4-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+0x167/0x220 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:351 [inline] print_report+0x163/0x540 mm/kasan/report.c:462 kasan_report+0x176/0x1b0 mm/kasan/report.c:572 kasan_check_range+0x283/0x290 mm/kasan/generic.c:187 instrument_atomic_read include/linux/instrumented.h:68 [inline] _test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline] test_bit_le include/asm-generic/bitops/le.h:21 [inline] reiserfs_readdir_inode+0x5a4/0x1490 fs/reiserfs/dir.c:147 iterate_dir+0x1fe/0x500 __do_sys_getdents64 fs/readdir.c:369 [inline] __se_sys_getdents64+0x1b7/0x3f0 fs/readdir.c:354 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: 0033:0x7f892908c0f9 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:00007f8929e5f168 EFLAGS: 00000246 ORIG_RAX: 00000000000000d9 RAX: ffffffffffffffda RBX: 00007f89291abf80 RCX: 00007f892908c0f9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004 RBP: 00007f89290e7b39 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffffbc539cf R14: 00007f8929e5f300 R15: 0000000000022000 The buggy address belongs to the physical page: page:ffffea0001c00700 refcount:0 mapcount:0 mapping:0000000000000000 index:0x1 pfn:0x7001c flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff) page_type: 0xffffffff() raw: 00fff00000000000 ffffea0001ba9488 ffffea0001c01b48 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 5455, tgid 5455 (dhcpcd-run-hook), ts 74184908778, free_ts 74175817879 prep_new_page mm/page_alloc.c:1738 [inline] get_page_from_freelist+0x321c/0x33a0 mm/page_alloc.c:3502 __alloc_pages+0x255/0x670 mm/page_alloc.c:4768 __folio_alloc+0x13/0x30 mm/page_alloc.c:4800 vma_alloc_folio+0x308/0x680 mm/mempolicy.c:2240 wp_page_copy mm/memory.c:3074 [inline] do_wp_page+0x8d1/0x2600 mm/memory.c:3432 handle_pte_fault mm/memory.c:4964 [inline] __handle_mm_fault mm/memory.c:5089 [inline] handle_mm_fault+0x1e84/0x41f0 mm/memory.c:5243 do_user_addr_fault arch/x86/mm/fault.c:1349 [inline] handle_page_fault arch/x86/mm/fault.c:1534 [inline] exc_page_fault+0x274/0x900 arch/x86/mm/fault.c:1590 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:1302 [inline] free_unref_page_prepare+0x8fe/0xa10 mm/page_alloc.c:2564 free_unref_page_list+0x596/0x830 mm/page_alloc.c:2705 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+0x351/0x890 mm/mmap.c:3123 __mmput+0xcb/0x300 kernel/fork.c:1351 exit_mm+0x1de/0x290 kernel/exit.c:564 do_exit+0x4f2/0x1d10 kernel/exit.c:858 do_group_exit+0x1b9/0x280 kernel/exit.c:1021 __do_sys_exit_group kernel/exit.c:1032 [inline] __se_sys_exit_group kernel/exit.c:1030 [inline] __x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1030 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: ffff88807001bf00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88807001bf80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff88807001c000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ^ ffff88807001c080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88807001c100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ==================================================================