ci starts bisection 2023-05-06 02:40:03.264855559 +0000 UTC m=+35027.758662806 bisecting fixing commit since fff5a5e7f528b2ed2c335991399a766c2cf01103 building syzkaller on f94b4a29b579b3de9aab3b41915e3663e6f7094e ensuring issue is reproducible on original commit fff5a5e7f528b2ed2c335991399a766c2cf01103 testing commit fff5a5e7f528b2ed2c335991399a766c2cf01103 gcc compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: 0e9da5e5caaa9adef5088c9ef194c3ee87b1eac6a31be4eb91396b0edd3c5f15 run #0: crashed: KASAN: slab-out-of-bounds Read in jfs_readdir run #1: crashed: KASAN: use-after-free Read in jfs_readdir run #2: crashed: KASAN: slab-out-of-bounds Read in jfs_readdir run #3: crashed: KASAN: slab-out-of-bounds Read in jfs_readdir run #4: crashed: KASAN: use-after-free Read in jfs_readdir run #5: crashed: KASAN: slab-use-after-free Read in jfs_readdir run #6: crashed: KASAN: slab-use-after-free Read in jfs_readdir run #7: crashed: KASAN: slab-use-after-free Read in jfs_readdir run #8: crashed: KASAN: slab-out-of-bounds Read in jfs_readdir run #9: crashed: KASAN: use-after-free Read in jfs_readdir run #10: crashed: KASAN: slab-out-of-bounds Read in jfs_readdir run #11: crashed: KASAN: slab-out-of-bounds Read in jfs_readdir run #12: crashed: KASAN: use-after-free Read in jfs_readdir run #13: crashed: KASAN: slab-use-after-free Read in jfs_readdir run #14: crashed: KASAN: slab-out-of-bounds Read in jfs_readdir run #15: crashed: KASAN: use-after-free Read in jfs_readdir run #16: crashed: KASAN: slab-out-of-bounds Read in jfs_readdir run #17: crashed: KASAN: slab-out-of-bounds Read in jfs_readdir run #18: crashed: KASAN: slab-out-of-bounds Read in jfs_readdir run #19: crashed: KASAN: slab-out-of-bounds Read in jfs_readdir testing current HEAD 2e1e1337881b0e9844d687982aa54b31b1269b11 testing commit 2e1e1337881b0e9844d687982aa54b31b1269b11 gcc compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: dd3e60efe82d3654ab3d145394c4d100b377e0f28f2cac28d9003c76936f6963 run #0: crashed: KASAN: use-after-free Read in jfs_readdir run #1: crashed: KASAN: slab-use-after-free Read in jfs_readdir run #2: crashed: KASAN: slab-out-of-bounds Read in jfs_readdir run #3: crashed: KASAN: use-after-free Read in jfs_readdir run #4: crashed: KASAN: slab-out-of-bounds Read in jfs_readdir run #5: crashed: KASAN: slab-out-of-bounds Read in jfs_readdir run #6: crashed: KASAN: slab-out-of-bounds Read in jfs_readdir run #7: crashed: KASAN: slab-out-of-bounds Read in jfs_readdir run #8: crashed: KASAN: slab-use-after-free Read in jfs_readdir run #9: crashed: KASAN: slab-use-after-free Read in jfs_readdir revisions tested: 2, total time: 23m54.737885831s (build: 17m24.847823709s, test: 5m50.268401613s) the crash still happens on HEAD commit msg: Merge tag '6.4-rc-ksmbd-server-fixes-part2' of git://git.samba.org/ksmbd crash: KASAN: slab-use-after-free Read in jfs_readdir loop0: detected capacity change from 0 to 32768 ================================================================== BUG: KASAN: slab-use-after-free in jfs_readdir+0x2a98/0x3610 fs/jfs/jfs_dtree.c:2889 Read of size 1 at addr ffff88806fc69b35 by task syz-executor.0/5712 CPU: 0 PID: 5712 Comm: syz-executor.0 Not tainted 6.3.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/14/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x64/0xb0 lib/dump_stack.c:106 print_address_description.constprop.0+0x2c/0x3c0 mm/kasan/report.c:351 print_report mm/kasan/report.c:462 [inline] kasan_report+0x11c/0x130 mm/kasan/report.c:572 jfs_readdir+0x2a98/0x3610 fs/jfs/jfs_dtree.c:2889 iterate_dir+0x1aa/0x6c0 fs/readdir.c:67 __do_sys_getdents64 fs/readdir.c:369 [inline] __se_sys_getdents64 fs/readdir.c:354 [inline] __x64_sys_getdents64+0x128/0x240 fs/readdir.c:354 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7effed48c0f9 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:00007effee1cf168 EFLAGS: 00000246 ORIG_RAX: 00000000000000d9 RAX: ffffffffffffffda RBX: 00007effed5abf80 RCX: 00007effed48c0f9 RDX: 00000000000000c5 RSI: 0000000020000200 RDI: 0000000000000004 RBP: 00007effed4e7b39 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffe8bd458cf R14: 00007effee1cf300 R15: 0000000000022000 Allocated by task 5708: kasan_save_stack+0x22/0x40 mm/kasan/common.c:45 kasan_set_track+0x25/0x30 mm/kasan/common.c:52 __kasan_slab_alloc+0x7f/0x90 mm/kasan/common.c:328 kasan_slab_alloc include/linux/kasan.h:186 [inline] slab_post_alloc_hook mm/slab.h:711 [inline] slab_alloc_node mm/slub.c:3451 [inline] slab_alloc mm/slub.c:3459 [inline] __kmem_cache_alloc_lru mm/slub.c:3466 [inline] kmem_cache_alloc_lru+0x20a/0x600 mm/slub.c:3482 alloc_inode_sb include/linux/fs.h:2705 [inline] jfs_alloc_inode+0x1e/0x50 fs/jfs/super.c:105 alloc_inode+0x56/0x1e0 fs/inode.c:260 iget_locked+0x151/0x5f0 fs/inode.c:1286 jfs_iget+0x11/0x420 fs/jfs/inode.c:29 jfs_fill_super+0x631/0xbe0 fs/jfs/super.c:580 mount_bdev+0x2d5/0x3c0 fs/super.c:1380 legacy_get_tree+0xfe/0x1f0 fs/fs_context.c:610 vfs_get_tree+0x83/0x320 fs/super.c:1510 do_new_mount fs/namespace.c:3039 [inline] path_mount+0x836/0x1a30 fs/namespace.c:3369 do_mount fs/namespace.c:3382 [inline] __do_sys_mount fs/namespace.c:3591 [inline] __se_sys_mount fs/namespace.c:3568 [inline] __x64_sys_mount+0x1f9/0x270 fs/namespace.c:3568 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd Freed by task 0: kasan_save_stack+0x22/0x40 mm/kasan/common.c:45 kasan_set_track+0x25/0x30 mm/kasan/common.c:52 kasan_save_free_info+0x2e/0x40 mm/kasan/generic.c:521 ____kasan_slab_free mm/kasan/common.c:236 [inline] ____kasan_slab_free+0x160/0x1c0 mm/kasan/common.c:200 kasan_slab_free include/linux/kasan.h:162 [inline] slab_free_hook mm/slub.c:1781 [inline] slab_free_freelist_hook+0x8b/0x1c0 mm/slub.c:1807 slab_free mm/slub.c:3786 [inline] kmem_cache_free+0xe9/0x480 mm/slub.c:3808 rcu_do_batch kernel/rcu/tree.c:2115 [inline] rcu_core+0x806/0x1ad0 kernel/rcu/tree.c:2377 __do_softirq+0x1d4/0x905 kernel/softirq.c:571 Last potentially related work creation: kasan_save_stack+0x22/0x40 mm/kasan/common.c:45 __kasan_record_aux_stack+0xbc/0xd0 mm/kasan/generic.c:491 __call_rcu_common.constprop.0+0x99/0x7e0 kernel/rcu/tree.c:2627 dispose_list+0xf0/0x1b0 fs/inode.c:698 evict_inodes+0x2b3/0x3b0 fs/inode.c:748 generic_shutdown_super+0xa3/0x420 fs/super.c:479 kill_block_super+0x9a/0xe0 fs/super.c:1407 deactivate_locked_super+0x7f/0x130 fs/super.c:331 cleanup_mnt+0x253/0x360 fs/namespace.c:1177 task_work_run+0x12f/0x220 kernel/task_work.c:179 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop kernel/entry/common.c:171 [inline] exit_to_user_mode_prepare+0x210/0x240 kernel/entry/common.c:204 __syscall_exit_to_user_mode_work kernel/entry/common.c:286 [inline] syscall_exit_to_user_mode+0x1d/0x50 kernel/entry/common.c:297 do_syscall_64+0x46/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x63/0xcd The buggy address belongs to the object at ffff88806fc69280 which belongs to the cache jfs_ip of size 2240 The buggy address is located 2229 bytes inside of freed 2240-byte region [ffff88806fc69280, ffff88806fc69b40) The buggy address belongs to the physical page: page:ffffea0001bf1a00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x6fc68 head:ffffea0001bf1a00 order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0 memcg:ffff8880709ddd01 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) page_type: 0xffffffff() raw: 00fff00000010200 ffff888017e40780 dead000000000122 0000000000000000 raw: 0000000000000000 00000000800d000d 00000001ffffffff ffff8880709ddd01 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 3, migratetype Reclaimable, gfp_mask 0x1d2050(__GFP_IO|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL|__GFP_RECLAIMABLE), pid 5708, tgid 5707 (syz-executor.0), ts 53660843807, free_ts 6042394681 prep_new_page mm/page_alloc.c:1738 [inline] get_page_from_freelist+0xf41/0x2c00 mm/page_alloc.c:3502 __alloc_pages+0x1cb/0x4a0 mm/page_alloc.c:4768 alloc_slab_page mm/slub.c:1851 [inline] allocate_slab+0x25f/0x390 mm/slub.c:1998 new_slab mm/slub.c:2051 [inline] ___slab_alloc+0xa91/0x1400 mm/slub.c:3192 __slab_alloc.constprop.0+0x56/0xa0 mm/slub.c:3291 __slab_alloc_node mm/slub.c:3344 [inline] slab_alloc_node mm/slub.c:3441 [inline] slab_alloc mm/slub.c:3459 [inline] __kmem_cache_alloc_lru mm/slub.c:3466 [inline] kmem_cache_alloc_lru+0x4a8/0x600 mm/slub.c:3482 alloc_inode_sb include/linux/fs.h:2705 [inline] jfs_alloc_inode+0x1e/0x50 fs/jfs/super.c:105 alloc_inode+0x56/0x1e0 fs/inode.c:260 new_inode_pseudo fs/inode.c:1018 [inline] new_inode+0x1a/0x240 fs/inode.c:1046 diReadSpecial+0x4d/0x650 fs/jfs/jfs_imap.c:422 jfs_mount+0x4c7/0x6e0 fs/jfs/jfs_mount.c:138 jfs_fill_super+0x553/0xbe0 fs/jfs/super.c:556 mount_bdev+0x2d5/0x3c0 fs/super.c:1380 legacy_get_tree+0xfe/0x1f0 fs/fs_context.c:610 vfs_get_tree+0x83/0x320 fs/super.c:1510 do_new_mount fs/namespace.c:3039 [inline] path_mount+0x836/0x1a30 fs/namespace.c:3369 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+0x629/0xca0 mm/page_alloc.c:2564 free_unref_page+0x33/0x370 mm/page_alloc.c:2659 free_contig_range+0xb5/0x180 mm/page_alloc.c:6994 destroy_args+0x50a/0x700 mm/debug_vm_pgtable.c:1023 debug_vm_pgtable+0x18fd/0x31a0 mm/debug_vm_pgtable.c:1403 do_one_initcall+0xc2/0x3c0 init/main.c:1246 do_initcall_level init/main.c:1319 [inline] do_initcalls init/main.c:1335 [inline] do_basic_setup init/main.c:1354 [inline] kernel_init_freeable+0x541/0x950 init/main.c:1571 kernel_init+0x1a/0x1c0 init/main.c:1462 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 Memory state around the buggy address: ffff88806fc69a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88806fc69a80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff88806fc69b00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ^ ffff88806fc69b80: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 ffff88806fc69c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ==================================================================