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List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6638:1383:b0:4bb:624c:5a7f with SMTP id 8926c6da1cb9f-4c63d51ff5bmr304730173.1.1722302063619; Mon, 29 Jul 2024 18:14:23 -0700 (PDT) Date: Mon, 29 Jul 2024 18:14:23 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000b2c0fc061e6cb26b@google.com> Subject: [syzbot] [bcachefs?] KASAN: slab-out-of-bounds Read in journal_entry_dev_usage_to_text From: syzbot To: kent.overstreet@linux.dev, linux-bcachefs@vger.kernel.org, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 1722389b0d86 Merge tag 'net-6.11-rc1' of git://git.kernel... git tree: upstream console+strace: https://syzkaller.appspot.com/x/log.txt?x=1544b603980000 kernel config: https://syzkaller.appspot.com/x/.config?x=b698a1b2fcd7ef5f dashboard link: https://syzkaller.appspot.com/bug?extid=05d7520be047c9be86e0 compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1686c69d980000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=150a1611980000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/e3f4ec8ccf7c/disk-1722389b.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/f19bcd908282/vmlinux-1722389b.xz kernel image: https://storage.googleapis.com/syzbot-assets/d93604974a98/bzImage-1722389b.xz mounted in repro: https://storage.googleapis.com/syzbot-assets/f4a9cf51fd0b/mount_0.gz The issue was bisected to: commit 03ef80b469d5d83530ce1ce15be78a40e5300f9b Author: Kent Overstreet Date: Sat Sep 23 22:41:51 2023 +0000 bcachefs: Ignore unknown mount options bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=147b3b0d980000 final oops: https://syzkaller.appspot.com/x/report.txt?x=167b3b0d980000 console output: https://syzkaller.appspot.com/x/log.txt?x=127b3b0d980000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+05d7520be047c9be86e0@syzkaller.appspotmail.com Fixes: 03ef80b469d5 ("bcachefs: Ignore unknown mount options") loop0: detected capacity change from 0 to 32768 ================================================================== BUG: KASAN: slab-out-of-bounds in journal_entry_dev_usage_to_text+0x109/0x1d0 fs/bcachefs/journal_io.c:731 Read of size 8 at addr ffff88807a286000 by task syz-executor816/5214 CPU: 1 UID: 0 PID: 5214 Comm: syz-executor816 Not tainted 6.10.0-syzkaller-12562-g1722389b0d86 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024 Call Trace: __dump_stack lib/dump_stack.c:93 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:119 print_address_description mm/kasan/report.c:377 [inline] print_report+0x169/0x550 mm/kasan/report.c:488 kasan_report+0x143/0x180 mm/kasan/report.c:601 journal_entry_dev_usage_to_text+0x109/0x1d0 fs/bcachefs/journal_io.c:731 bch2_sb_clean_to_text+0x138/0x240 fs/bcachefs/sb-clean.c:251 bch2_sb_field_validate+0x201/0x2e0 fs/bcachefs/super-io.c:1229 bch2_sb_validate+0xa69/0xe00 fs/bcachefs/super-io.c:468 __bch2_read_super+0xc1b/0x1370 fs/bcachefs/super-io.c:823 bch2_fs_open+0x246/0xdf0 fs/bcachefs/super.c:2084 bch2_fs_get_tree+0x731/0x1700 fs/bcachefs/fs.c:1933 vfs_get_tree+0x90/0x2a0 fs/super.c:1789 do_new_mount+0x2be/0xb40 fs/namespace.c:3472 do_mount fs/namespace.c:3812 [inline] __do_sys_mount fs/namespace.c:4020 [inline] __se_sys_mount+0x2d6/0x3c0 fs/namespace.c:3997 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f14389cf06a Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 5e 04 00 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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:00007ffe1945e9d8 EFLAGS: 00000282 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007ffe1945e9f0 RCX: 00007f14389cf06a RDX: 0000000020005b00 RSI: 0000000020005b40 RDI: 00007ffe1945e9f0 RBP: 0000000000000004 R08: 00007ffe1945ea30 R09: 0000000000005b72 R10: 0000000000000000 R11: 0000000000000282 R12: 0000000000000000 R13: 00007ffe1945ea30 R14: 0000000000000003 R15: 0000000001000000 Allocated by task 5214: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 poison_kmalloc_redzone mm/kasan/common.c:370 [inline] __kasan_kmalloc+0x98/0xb0 mm/kasan/common.c:387 kasan_kmalloc include/linux/kasan.h:211 [inline] __do_kmalloc_node mm/slub.c:4158 [inline] __kmalloc_node_track_caller_noprof+0x225/0x440 mm/slub.c:4177 __do_krealloc mm/slab_common.c:1280 [inline] krealloc_noprof+0x7d/0x120 mm/slab_common.c:1313 bch2_sb_realloc+0x2d2/0x660 fs/bcachefs/super-io.c:189 read_one_super+0x73b/0xf40 fs/bcachefs/super-io.c:660 __bch2_read_super+0x873/0x1370 fs/bcachefs/super-io.c:751 bch2_fs_open+0x246/0xdf0 fs/bcachefs/super.c:2084 bch2_fs_get_tree+0x731/0x1700 fs/bcachefs/fs.c:1933 vfs_get_tree+0x90/0x2a0 fs/super.c:1789 do_new_mount+0x2be/0xb40 fs/namespace.c:3472 do_mount fs/namespace.c:3812 [inline] __do_sys_mount fs/namespace.c:4020 [inline] __se_sys_mount+0x2d6/0x3c0 fs/namespace.c:3997 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f The buggy address belongs to the object at ffff88807a284000 which belongs to the cache kmalloc-8k of size 8192 The buggy address is located 0 bytes to the right of allocated 8192-byte region [ffff88807a284000, ffff88807a286000) The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x7a280 head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 ksm flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff) page_type: 0xfdffffff(slab) raw: 00fff00000000040 ffff888015442280 ffffea0000948200 0000000000000003 raw: 0000000000000000 0000000080020002 00000001fdffffff 0000000000000000 head: 00fff00000000040 ffff888015442280 ffffea0000948200 0000000000000003 head: 0000000000000000 0000000080020002 00000001fdffffff 0000000000000000 head: 00fff00000000003 ffffea0001e8a001 ffffffffffffffff 0000000000000000 head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd2040(__GFP_IO|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 4879, tgid 4879 (rcS), ts 34538747384, free_ts 34514158572 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1493 prep_new_page mm/page_alloc.c:1501 [inline] get_page_from_freelist+0x2e4c/0x2f10 mm/page_alloc.c:3438 __alloc_pages_noprof+0x256/0x6c0 mm/page_alloc.c:4696 __alloc_pages_node_noprof include/linux/gfp.h:269 [inline] alloc_pages_node_noprof include/linux/gfp.h:296 [inline] alloc_slab_page+0x5f/0x120 mm/slub.c:2321 allocate_slab+0x5a/0x2f0 mm/slub.c:2484 new_slab mm/slub.c:2537 [inline] ___slab_alloc+0xcd1/0x14b0 mm/slub.c:3723 __slab_alloc+0x58/0xa0 mm/slub.c:3813 __slab_alloc_node mm/slub.c:3866 [inline] slab_alloc_node mm/slub.c:4025 [inline] __kmalloc_cache_noprof+0x1d5/0x2c0 mm/slub.c:4184 kmalloc_noprof include/linux/slab.h:681 [inline] kzalloc_noprof include/linux/slab.h:807 [inline] tomoyo_print_bprm security/tomoyo/audit.c:26 [inline] tomoyo_init_log+0x11ce/0x2050 security/tomoyo/audit.c:264 tomoyo_supervisor+0x38a/0x11f0 security/tomoyo/common.c:2089 tomoyo_audit_env_log security/tomoyo/environ.c:36 [inline] tomoyo_env_perm+0x178/0x210 security/tomoyo/environ.c:63 tomoyo_environ security/tomoyo/domain.c:672 [inline] tomoyo_find_next_domain+0x1384/0x1cf0 security/tomoyo/domain.c:878 tomoyo_bprm_check_security+0x115/0x180 security/tomoyo/tomoyo.c:102 security_bprm_check+0x65/0x90 security/security.c:1191 search_binary_handler fs/exec.c:1809 [inline] exec_binprm fs/exec.c:1863 [inline] bprm_execve+0xa56/0x1770 fs/exec.c:1914 do_execveat_common+0x55f/0x6f0 fs/exec.c:2021 page last free pid 4878 tgid 4878 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1094 [inline] free_unref_page+0xd19/0xea0 mm/page_alloc.c:2608 discard_slab mm/slub.c:2583 [inline] __put_partials+0xeb/0x130 mm/slub.c:3051 put_cpu_partial+0x17c/0x250 mm/slub.c:3126 __slab_free+0x2ea/0x3d0 mm/slub.c:4343 qlink_free mm/kasan/quarantine.c:163 [inline] qlist_free_all+0x9e/0x140 mm/kasan/quarantine.c:179 kasan_quarantine_reduce+0x14f/0x170 mm/kasan/quarantine.c:286 __kasan_slab_alloc+0x23/0x80 mm/kasan/common.c:322 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook mm/slub.c:3988 [inline] slab_alloc_node mm/slub.c:4037 [inline] kmem_cache_alloc_noprof+0x135/0x2a0 mm/slub.c:4044 vm_area_alloc+0x24/0x1d0 kernel/fork.c:471 mmap_region+0xc3d/0x2090 mm/mmap.c:2944 do_mmap+0x8f9/0x1010 mm/mmap.c:1468 vm_mmap_pgoff+0x1dd/0x3d0 mm/util.c:588 ksys_mmap_pgoff+0x4f1/0x720 mm/mmap.c:1514 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f Memory state around the buggy address: ffff88807a285f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88807a285f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff88807a286000: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff88807a286080: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88807a286100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ================================================================== --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@googlegroups.com. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. For information about bisection process see: https://goo.gl/tpsmEJ#bisection If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing. If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup