ci2 starts bisection 2023-05-30 02:06:00.318346859 +0000 UTC m=+290453.279785803 bisecting fixing commit since 1e760fa3596e8c7f08412712c168288b79670d78 building syzkaller on 9700afae0a79ffbe2070dec1a857a60356157e85 ensuring issue is reproducible on original commit 1e760fa3596e8c7f08412712c168288b79670d78 testing commit 1e760fa3596e8c7f08412712c168288b79670d78 gcc compiler: Debian clang version 15.0.7, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: 39a379f7ba06a34953ef01e66a0549ad91402913e89a6d42bb824e3fbd7e6346 run #0: crashed: KASAN: use-after-free Read in reiserfs_get_unused_objectid run #1: crashed: KASAN: use-after-free Read in reiserfs_get_unused_objectid run #2: crashed: fatal error: fault run #3: crashed: KASAN: use-after-free Read in reiserfs_get_unused_objectid run #4: crashed: SYZFATAL: executor failed NUM times: executor NUM: EOF run #5: crashed: KASAN: use-after-free Read in reiserfs_get_unused_objectid run #6: crashed: KASAN: use-after-free Read in reiserfs_get_unused_objectid run #7: crashed: KASAN: use-after-free Read in reiserfs_get_unused_objectid run #8: crashed: KASAN: use-after-free Read in reiserfs_get_unused_objectid run #9: crashed: KASAN: use-after-free Read in reiserfs_get_unused_objectid run #10: crashed: KASAN: use-after-free Read in reiserfs_get_unused_objectid run #11: crashed: KASAN: use-after-free Read in reiserfs_get_unused_objectid run #12: crashed: KASAN: use-after-free Read in reiserfs_get_unused_objectid run #13: crashed: KASAN: use-after-free Read in reiserfs_get_unused_objectid run #14: crashed: KASAN: use-after-free Read in reiserfs_get_unused_objectid run #15: crashed: KASAN: use-after-free Read in reiserfs_get_unused_objectid run #16: crashed: KASAN: use-after-free Read in reiserfs_get_unused_objectid run #17: crashed: KASAN: use-after-free Read in reiserfs_get_unused_objectid run #18: crashed: KASAN: use-after-free Read in reiserfs_get_unused_objectid run #19: crashed: KASAN: use-after-free Read in reiserfs_get_unused_objectid 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: 676ff33f1d0a081cd255e777ab0cd6b06c119b812f3149e76902cecb1ef3a668 run #0: crashed: fatal error: unexpected signal during runtime execution run #1: crashed: panic: runtime error: invalid memory address or nil pointer dereference run #2: crashed: fatal error: unknown caller pc run #3: crashed: KASAN: use-after-free Read in reiserfs_get_unused_objectid run #4: crashed: KASAN: use-after-free Read in reiserfs_get_unused_objectid run #5: crashed: KASAN: use-after-free Read in reiserfs_get_unused_objectid run #6: crashed: KASAN: use-after-free Read in reiserfs_get_unused_objectid run #7: crashed: KASAN: use-after-free Read in reiserfs_get_unused_objectid run #8: crashed: KASAN: use-after-free Read in reiserfs_get_unused_objectid run #9: crashed: KASAN: use-after-free Read in reiserfs_get_unused_objectid crash still not fixed/happens on the oldest tested release revisions tested: 2, total time: 41m20.763710445s (build: 33m53.288684264s, test: 6m32.993400927s) 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_get_unused_objectid REISERFS warning: read_super_block: reiserfs filesystem is deprecated and scheduled to be removed from the kernel in 2025 REISERFS (device loop0): found reiserfs format "3.5" with non-standard journal REISERFS (device loop0): using ordered data mode reiserfs: using flush barriers 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 reiserfs_get_unused_objectid+0x1e7/0x3f0 fs/reiserfs/objectid.c:87 Read of size 250888 at addr ffff88806eaae058 by task syz-executor.0/5729 CPU: 1 PID: 5729 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 __asan_memmove+0x29/0x70 mm/kasan/shadow.c:94 reiserfs_get_unused_objectid+0x1e7/0x3f0 fs/reiserfs/objectid.c:87 reiserfs_new_inode+0x298/0x1a20 fs/reiserfs/inode.c:1944 reiserfs_mkdir+0x543/0x870 fs/reiserfs/namei.c:843 xattr_mkdir fs/reiserfs/xattr.c:77 [inline] create_privroot fs/reiserfs/xattr.c:890 [inline] reiserfs_xattr_init+0x2d0/0x5b0 fs/reiserfs/xattr.c:1006 reiserfs_fill_super+0x1b9a/0x2070 fs/reiserfs/super.c:2175 mount_bdev+0x283/0x370 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+0x1e5/0x930 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: 0033:0x7fa8ee88d62a 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:00007fa8ef567f88 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000000001138 RCX: 00007fa8ee88d62a RDX: 0000000020000080 RSI: 0000000020000040 RDI: 00007fa8ef567fe0 RBP: 00007fa8ef568020 R08: 00007fa8ef568020 R09: 0000000000008008 R10: 0000000000008008 R11: 0000000000000246 R12: 0000000020000080 R13: 0000000020000040 R14: 00007fa8ef567fe0 R15: 00000000200000c0 The buggy address belongs to the physical page: page:ffffea0001baab80 refcount:3 mapcount:0 mapping:ffff88801a5012e8 index:0x10 pfn:0x6eaae memcg:ffff88801b21e000 aops:def_blk_aops ino:700000 flags: 0xfff00000002022(referenced|active|private|node=0|zone=1|lastcpupid=0x7ff) page_type: 0xffffffff() raw: 00fff00000002022 0000000000000000 dead000000000122 ffff88801a5012e8 raw: 0000000000000010 ffff88806fd25488 00000003ffffffff ffff88801b21e000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 0, migratetype Movable, gfp_mask 0x148c48(GFP_NOFS|__GFP_NOFAIL|__GFP_COMP|__GFP_HARDWALL|__GFP_MOVABLE), pid 5729, tgid 5728 (syz-executor.0), ts 77952418900, free_ts 77943013412 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/mempolicy.c:2289 filemap_alloc_folio+0xc6/0x3e0 mm/filemap.c:976 __filemap_get_folio+0x17c/0x620 mm/filemap.c:1965 pagecache_get_page+0x13/0x160 mm/folio-compat.c:99 find_or_create_page include/linux/pagemap.h:635 [inline] grow_dev_page fs/buffer.c:995 [inline] grow_buffers fs/buffer.c:1060 [inline] __getblk_slow fs/buffer.c:1087 [inline] __getblk_gfp+0x1bf/0x900 fs/buffer.c:1382 __bread_gfp+0xe/0x220 fs/buffer.c:1416 sb_bread include/linux/buffer_head.h:347 [inline] read_super_block+0x84/0x700 fs/reiserfs/super.c:1604 reiserfs_fill_super+0xa22/0x2070 fs/reiserfs/super.c:1966 mount_bdev+0x283/0x370 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+0x1e5/0x930 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 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 unmap_region+0x247/0x2a0 mm/mmap.c:2222 do_vmi_align_munmap+0xe43/0x1470 mm/mmap.c:2473 do_vmi_munmap+0x199/0x1f0 mm/mmap.c:2530 __vm_munmap+0x1ff/0x3d0 mm/mmap.c:2805 __do_sys_munmap mm/mmap.c:2830 [inline] __se_sys_munmap mm/mmap.c:2827 [inline] __x64_sys_munmap+0x5b/0x70 mm/mmap.c:2827 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: ffff88806eaaff00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88806eaaff80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff88806eab0000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ^ ffff88806eab0080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff88806eab0100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ==================================================================