ci2 starts bisection 2023-02-01 22:23:05.400415917 +0000 UTC m=+44124.153699546 bisecting fixing commit since 1b929c02afd37871d5afb9d498426f83432e71c2 building syzkaller on 9da18ae8fa827d046ef8da48cc23c97418553c23 ensuring issue is reproducible on original commit 1b929c02afd37871d5afb9d498426f83432e71c2 testing commit 1b929c02afd37871d5afb9d498426f83432e71c2 gcc compiler: Debian clang version 13.0.1-6~deb11u1, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: 3cb141242583c88df7d8a046ffc9f0402d49d974a54c493c8372722d44191428 run #0: crashed: KASAN: use-after-free Read in ext4_find_extent run #1: crashed: KASAN: slab-out-of-bounds Read in ext4_find_extent run #2: crashed: KASAN: use-after-free Read in ext4_find_extent run #3: crashed: KASAN: slab-out-of-bounds Read in ext4_find_extent run #4: crashed: KASAN: use-after-free Read in ext4_find_extent run #5: crashed: KFENCE: use-after-free in ext4_find_extent run #6: crashed: KASAN: use-after-free Read in ext4_find_extent run #7: crashed: KASAN: use-after-free Read in ext4_find_extent run #8: crashed: KASAN: slab-out-of-bounds Read in ext4_find_extent run #9: crashed: KASAN: slab-out-of-bounds Read in ext4_find_extent run #10: crashed: KASAN: use-after-free Read in ext4_find_extent run #11: crashed: KASAN: slab-out-of-bounds Read in ext4_find_extent run #12: crashed: KASAN: slab-out-of-bounds Read in ext4_find_extent run #13: crashed: KASAN: use-after-free Read in ext4_find_extent run #14: crashed: KASAN: use-after-free Read in ext4_find_extent run #15: crashed: KASAN: use-after-free Read in ext4_find_extent run #16: crashed: KASAN: slab-out-of-bounds Read in ext4_find_extent run #17: crashed: KASAN: use-after-free Read in ext4_find_extent run #18: crashed: KASAN: slab-out-of-bounds Read in ext4_find_extent run #19: crashed: KASAN: use-after-free Read in ext4_find_extent testing current HEAD 9f266ccaa2f5228bfe67ad58a94ca4e0109b954a testing commit 9f266ccaa2f5228bfe67ad58a94ca4e0109b954a gcc compiler: Debian clang version 13.0.1-6~deb11u1, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: 2cdb124e5173ed52cb31bf8130aef9e44ca4eecd30b091bae1cc523ff844c037 run #0: crashed: KASAN: use-after-free Read in ext4_find_extent run #1: crashed: KASAN: slab-out-of-bounds Read in ext4_find_extent run #2: crashed: KASAN: use-after-free Read in ext4_find_extent run #3: crashed: KASAN: use-after-free Read in ext4_find_extent run #4: crashed: KASAN: use-after-free Read in ext4_find_extent run #5: crashed: KASAN: use-after-free Read in ext4_find_extent run #6: crashed: KASAN: slab-out-of-bounds Read in ext4_find_extent run #7: crashed: KASAN: use-after-free Read in ext4_find_extent run #8: crashed: KASAN: use-after-free Read in ext4_find_extent run #9: crashed: KASAN: use-after-free Read in ext4_find_extent revisions tested: 2, total time: 40m26.795765859s (build: 31m20.167063229s, test: 6m53.372540732s) the crash still happens on HEAD commit msg: Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost crash: KASAN: use-after-free Read in ext4_find_extent loop0: detected capacity change from 0 to 2048 EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 without journal. Quota mode: none. ================================================================== BUG: KASAN: use-after-free in ext4_ext_binsearch_idx fs/ext4/extents.c:768 [inline] BUG: KASAN: use-after-free in ext4_find_extent+0x76f/0xc90 fs/ext4/extents.c:931 Read of size 4 at addr ffff88807658e938 by task syz-executor.0/5573 CPU: 1 PID: 5573 Comm: syz-executor.0 Not tainted 6.2.0-rc6-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x12a/0x1c0 lib/dump_stack.c:106 print_address_description+0x74/0x340 mm/kasan/report.c:306 print_report+0x107/0x1f0 mm/kasan/report.c:417 kasan_report+0xcd/0x100 mm/kasan/report.c:517 ext4_ext_binsearch_idx fs/ext4/extents.c:768 [inline] ext4_find_extent+0x76f/0xc90 fs/ext4/extents.c:931 ext4_clu_mapped+0xcb/0x7e0 fs/ext4/extents.c:5809 ext4_insert_delayed_block fs/ext4/inode.c:1696 [inline] ext4_da_map_blocks fs/ext4/inode.c:1806 [inline] ext4_da_get_block_prep+0x85f/0x1010 fs/ext4/inode.c:1870 ext4_block_write_begin+0x459/0x1840 fs/ext4/inode.c:1098 ext4_da_write_begin+0x468/0x5f0 fs/ext4/inode.c:3082 generic_perform_write+0x2bb/0x510 mm/filemap.c:3772 ext4_buffered_write_iter+0xf5/0x2e0 fs/ext4/file.c:285 ext4_file_write_iter+0x192/0x1470 call_write_iter include/linux/fs.h:2189 [inline] new_sync_write fs/read_write.c:491 [inline] vfs_write+0x7b2/0xb00 fs/read_write.c:584 ksys_write+0x11d/0x200 fs/read_write.c:637 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f84c428c0a9 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:00007f84c4f97168 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007f84c43abf80 RCX: 00007f84c428c0a9 RDX: 00000000175d9003 RSI: 0000000020000200 RDI: 0000000000000004 RBP: 00007f84c42e7ae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffe2d09f3ef R14: 00007f84c4f97300 R15: 0000000000022000 Allocated by task 5507: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x3d/0x60 mm/kasan/common.c:52 __kasan_slab_alloc+0x65/0x70 mm/kasan/common.c:325 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook mm/slab.h:761 [inline] slab_alloc_node mm/slub.c:3452 [inline] slab_alloc mm/slub.c:3460 [inline] __kmem_cache_alloc_lru mm/slub.c:3467 [inline] kmem_cache_alloc_lru+0x183/0x320 mm/slub.c:3483 alloc_inode_sb include/linux/fs.h:3119 [inline] sock_alloc_inode+0x1c/0xb0 net/socket.c:304 alloc_inode fs/inode.c:259 [inline] new_inode_pseudo+0x56/0x180 fs/inode.c:1018 sock_alloc net/socket.c:627 [inline] __sock_create+0xc1/0x6e0 net/socket.c:1479 sock_create net/socket.c:1566 [inline] __sys_socket_create net/socket.c:1603 [inline] __sys_socket+0xfc/0x310 net/socket.c:1636 __do_sys_socket net/socket.c:1649 [inline] __se_sys_socket net/socket.c:1647 [inline] __x64_sys_socket+0x71/0x80 net/socket.c:1647 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd Freed by task 21: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x3d/0x60 mm/kasan/common.c:52 kasan_save_free_info+0x27/0x40 mm/kasan/generic.c:518 ____kasan_slab_free+0xd6/0x120 mm/kasan/common.c:236 kasan_slab_free include/linux/kasan.h:177 [inline] slab_free_hook mm/slub.c:1781 [inline] slab_free_freelist_hook+0x12e/0x1a0 mm/slub.c:1807 slab_free mm/slub.c:3787 [inline] kmem_cache_free+0x94/0x1d0 mm/slub.c:3809 rcu_do_batch kernel/rcu/tree.c:2246 [inline] rcu_core+0x9c1/0x1690 kernel/rcu/tree.c:2506 __do_softirq+0x277/0x738 kernel/softirq.c:571 Last potentially related work creation: kasan_save_stack+0x2b/0x50 mm/kasan/common.c:45 __kasan_record_aux_stack+0xb0/0xc0 mm/kasan/generic.c:488 __call_rcu_common kernel/rcu/tree.c:2755 [inline] call_rcu+0x163/0xa70 kernel/rcu/tree.c:2868 __dentry_kill+0x334/0x4e0 fs/dcache.c:607 dentry_kill+0xbb/0x1e0 dput+0x16c/0x300 fs/dcache.c:913 __fput+0x4cd/0x710 fs/file_table.c:328 task_work_run+0x227/0x2b0 kernel/task_work.c:179 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop+0x124/0x150 kernel/entry/common.c:171 exit_to_user_mode_prepare+0xb2/0x140 kernel/entry/common.c:203 __syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline] syscall_exit_to_user_mode+0x26/0x60 kernel/entry/common.c:296 do_syscall_64+0x49/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x63/0xcd The buggy address belongs to the object at ffff88807658e600 which belongs to the cache sock_inode_cache of size 1408 The buggy address is located 824 bytes inside of 1408-byte region [ffff88807658e600, ffff88807658eb80) The buggy address belongs to the physical page: page:ffffea0001d96200 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x76588 head:ffffea0001d96200 order:3 compound_mapcount:0 subpages_mapcount:0 compound_pincount:0 memcg:ffff88801fecdc01 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000010200 ffff888144fb08c0 dead000000000122 0000000000000000 raw: 0000000000000000 0000000000150015 00000001ffffffff ffff88801fecdc01 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 3, migratetype Reclaimable, gfp_mask 0x1d20d0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL|__GFP_RECLAIMABLE), pid 5507, tgid 5507 (syz-executor.0), ts 76720666032, free_ts 75409155455 prep_new_page mm/page_alloc.c:2531 [inline] get_page_from_freelist+0x742/0x7c0 mm/page_alloc.c:4283 __alloc_pages+0x259/0x560 mm/page_alloc.c:5549 alloc_slab_page+0xbd/0x190 mm/slub.c:1851 allocate_slab+0x5e/0x3c0 mm/slub.c:1998 new_slab mm/slub.c:2051 [inline] ___slab_alloc+0x782/0xe20 mm/slub.c:3193 __slab_alloc mm/slub.c:3292 [inline] __slab_alloc_node mm/slub.c:3345 [inline] slab_alloc_node mm/slub.c:3442 [inline] slab_alloc mm/slub.c:3460 [inline] __kmem_cache_alloc_lru mm/slub.c:3467 [inline] kmem_cache_alloc_lru+0x238/0x320 mm/slub.c:3483 alloc_inode_sb include/linux/fs.h:3119 [inline] sock_alloc_inode+0x1c/0xb0 net/socket.c:304 alloc_inode fs/inode.c:259 [inline] new_inode_pseudo+0x56/0x180 fs/inode.c:1018 sock_alloc net/socket.c:627 [inline] __sock_create+0xc1/0x6e0 net/socket.c:1479 sock_create net/socket.c:1566 [inline] __sys_socket_create net/socket.c:1603 [inline] __sys_socket+0xfc/0x310 net/socket.c:1636 __do_sys_socket net/socket.c:1649 [inline] __se_sys_socket net/socket.c:1647 [inline] __x64_sys_socket+0x71/0x80 net/socket.c:1647 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1446 [inline] free_pcp_prepare+0x751/0x780 mm/page_alloc.c:1496 free_unref_page_prepare mm/page_alloc.c:3369 [inline] free_unref_page+0x19/0x4c0 mm/page_alloc.c:3464 qlist_free_all+0x2b/0x70 mm/kasan/quarantine.c:187 kasan_quarantine_reduce+0x156/0x170 mm/kasan/quarantine.c:294 __kasan_slab_alloc+0x1f/0x70 mm/kasan/common.c:302 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook mm/slab.h:761 [inline] slab_alloc_node mm/slub.c:3452 [inline] __kmem_cache_alloc_node+0x1e0/0x340 mm/slub.c:3491 __do_kmalloc_node mm/slab_common.c:967 [inline] __kmalloc+0x9e/0x190 mm/slab_common.c:981 kmalloc include/linux/slab.h:584 [inline] tomoyo_add_entry security/tomoyo/common.c:2022 [inline] tomoyo_supervisor+0xc55/0x10f0 security/tomoyo/common.c:2094 tomoyo_audit_env_log security/tomoyo/environ.c:36 [inline] tomoyo_env_perm+0x114/0x1d0 security/tomoyo/environ.c:63 tomoyo_environ security/tomoyo/domain.c:672 [inline] tomoyo_find_next_domain+0x1380/0x1800 security/tomoyo/domain.c:879 tomoyo_bprm_check_security+0xe7/0x130 security/tomoyo/tomoyo.c:101 security_bprm_check+0x58/0x90 security/security.c:897 search_binary_handler fs/exec.c:1723 [inline] exec_binprm fs/exec.c:1777 [inline] bprm_execve+0x851/0x1250 fs/exec.c:1851 do_execveat_common+0x445/0x610 fs/exec.c:1956 do_execve fs/exec.c:2030 [inline] __do_sys_execve fs/exec.c:2106 [inline] __se_sys_execve fs/exec.c:2101 [inline] __x64_sys_execve+0x89/0xa0 fs/exec.c:2101 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 Memory state around the buggy address: ffff88807658e800: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88807658e880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff88807658e900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88807658e980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88807658ea00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================