================================================================== BUG: KASAN: slab-out-of-bounds in __ext4_iget+0x254/0x31b4 fs/ext4/inode.c:4822 Read of size 8 at addr ffff00011279ff30 by task syz-executor.4/14838 CPU: 0 PID: 14838 Comm: syz-executor.4 Not tainted 6.1.39-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/03/2023 Call trace: dump_backtrace+0x1c8/0x1f4 arch/arm64/kernel/stacktrace.c:158 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:165 __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x108/0x170 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:284 [inline] print_report+0x174/0x4c0 mm/kasan/report.c:395 kasan_report+0xd4/0x130 mm/kasan/report.c:495 __asan_report_load8_noabort+0x2c/0x38 mm/kasan/report_generic.c:351 __ext4_iget+0x254/0x31b4 fs/ext4/inode.c:4822 __ext4_fill_super fs/ext4/super.c:5399 [inline] ext4_fill_super+0x5a80/0x75d0 fs/ext4/super.c:5661 get_tree_bdev+0x360/0x54c fs/super.c:1346 ext4_get_tree+0x28/0x38 fs/ext4/super.c:5691 vfs_get_tree+0x90/0x274 fs/super.c:1553 do_new_mount+0x25c/0x8c4 fs/namespace.c:3040 path_mount+0x590/0xe58 fs/namespace.c:3370 do_mount fs/namespace.c:3383 [inline] __do_sys_mount fs/namespace.c:3591 [inline] __se_sys_mount fs/namespace.c:3568 [inline] __arm64_sys_mount+0x45c/0x594 fs/namespace.c:3568 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x64/0x218 arch/arm64/kernel/syscall.c:206 el0_svc+0x58/0x168 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:581 Allocated by task 14654: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4c/0x80 mm/kasan/common.c:52 kasan_save_alloc_info+0x24/0x30 mm/kasan/generic.c:505 __kasan_slab_alloc+0x74/0x8c mm/kasan/common.c:328 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook+0x74/0x458 mm/slab.h:737 slab_alloc_node mm/slub.c:3398 [inline] slab_alloc mm/slub.c:3406 [inline] __kmem_cache_alloc_lru mm/slub.c:3413 [inline] kmem_cache_alloc_lru+0x1ac/0x2f8 mm/slub.c:3429 alloc_inode_sb include/linux/fs.h:3131 [inline] proc_alloc_inode+0x2c/0xb8 fs/proc/inode.c:67 alloc_inode fs/inode.c:259 [inline] new_inode_pseudo+0x68/0x1d0 fs/inode.c:1018 new_inode+0x38/0x174 fs/inode.c:1046 proc_pid_make_inode+0x34/0x1b0 fs/proc/base.c:1897 proc_ns_instantiate fs/proc/namespaces.c:105 [inline] proc_ns_dir_lookup+0x19c/0x2f8 fs/proc/namespaces.c:172 lookup_open fs/namei.c:3391 [inline] open_last_lookups fs/namei.c:3481 [inline] path_openat+0xd3c/0x2548 fs/namei.c:3711 do_filp_open+0x1bc/0x3cc fs/namei.c:3741 do_sys_openat2+0x128/0x3d8 fs/open.c:1318 do_sys_open fs/open.c:1334 [inline] __do_sys_openat fs/open.c:1350 [inline] __se_sys_openat fs/open.c:1345 [inline] __arm64_sys_openat+0x1f0/0x240 fs/open.c:1345 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x64/0x218 arch/arm64/kernel/syscall.c:206 el0_svc+0x58/0x168 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:581 Freed by task 15: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4c/0x80 mm/kasan/common.c:52 kasan_save_free_info+0x38/0x5c mm/kasan/generic.c:516 ____kasan_slab_free+0x144/0x1c0 mm/kasan/common.c:236 __kasan_slab_free+0x18/0x28 mm/kasan/common.c:244 kasan_slab_free include/linux/kasan.h:177 [inline] slab_free_hook mm/slub.c:1724 [inline] slab_free_freelist_hook mm/slub.c:1750 [inline] slab_free mm/slub.c:3661 [inline] kmem_cache_free+0x2f0/0x588 mm/slub.c:3683 proc_free_inode+0x28/0x38 fs/proc/inode.c:83 i_callback+0x50/0x78 fs/inode.c:248 rcu_do_batch kernel/rcu/tree.c:2251 [inline] rcu_core+0x878/0x1c10 kernel/rcu/tree.c:2511 rcu_core_si+0x10/0x1c kernel/rcu/tree.c:2528 __do_softirq+0x30c/0xea0 kernel/softirq.c:571 Last potentially related work creation: kasan_save_stack+0x40/0x70 mm/kasan/common.c:45 __kasan_record_aux_stack+0xcc/0xe8 mm/kasan/generic.c:486 kasan_record_aux_stack_noalloc+0x14/0x20 mm/kasan/generic.c:496 call_rcu+0xfc/0xa40 kernel/rcu/tree.c:2799 destroy_inode fs/inode.c:314 [inline] evict+0x5fc/0x68c fs/inode.c:679 iput_final fs/inode.c:1789 [inline] iput+0x7c0/0x8a4 fs/inode.c:1815 dentry_unlink_inode+0x370/0x4b0 fs/dcache.c:401 __dentry_kill+0x324/0x5e4 fs/dcache.c:607 shrink_dentry_list+0x41c/0x850 fs/dcache.c:1201 shrink_dcache_parent+0xbc/0x434 d_invalidate+0x114/0x2a0 fs/dcache.c:1737 proc_invalidate_siblings_dcache+0x3b8/0x660 fs/proc/inode.c:148 proc_flush_pid+0x24/0x34 fs/proc/base.c:3409 release_task+0x137c/0x1550 kernel/exit.c:278 wait_task_zombie kernel/exit.c:1205 [inline] wait_consider_task+0x15fc/0x2754 kernel/exit.c:1432 do_wait_thread kernel/exit.c:1495 [inline] do_wait+0x314/0xb40 kernel/exit.c:1612 kernel_wait4+0x24c/0x3d8 kernel/exit.c:1775 __do_sys_wait4 kernel/exit.c:1803 [inline] __se_sys_wait4 kernel/exit.c:1799 [inline] __arm64_sys_wait4+0x11c/0x2a0 kernel/exit.c:1799 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x64/0x218 arch/arm64/kernel/syscall.c:206 el0_svc+0x58/0x168 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:581 Second to last potentially related work creation: kasan_save_stack+0x40/0x70 mm/kasan/common.c:45 __kasan_record_aux_stack+0xcc/0xe8 mm/kasan/generic.c:486 kasan_record_aux_stack_noalloc+0x14/0x20 mm/kasan/generic.c:496 call_rcu+0xfc/0xa40 kernel/rcu/tree.c:2799 destroy_inode fs/inode.c:314 [inline] evict+0x5fc/0x68c fs/inode.c:679 iput_final fs/inode.c:1789 [inline] iput+0x7c0/0x8a4 fs/inode.c:1815 dentry_unlink_inode+0x370/0x4b0 fs/dcache.c:401 __dentry_kill+0x324/0x5e4 fs/dcache.c:607 shrink_dentry_list+0x41c/0x850 fs/dcache.c:1201 shrink_dcache_parent+0xbc/0x434 d_invalidate+0x114/0x2a0 fs/dcache.c:1737 proc_invalidate_siblings_dcache+0x3b8/0x660 fs/proc/inode.c:148 proc_flush_pid+0x24/0x34 fs/proc/base.c:3409 release_task+0x137c/0x1550 kernel/exit.c:278 wait_task_zombie kernel/exit.c:1205 [inline] wait_consider_task+0x15fc/0x2754 kernel/exit.c:1432 do_wait_thread kernel/exit.c:1495 [inline] do_wait+0x314/0xb40 kernel/exit.c:1612 kernel_wait4+0x24c/0x3d8 kernel/exit.c:1775 __do_sys_wait4 kernel/exit.c:1803 [inline] __se_sys_wait4 kernel/exit.c:1799 [inline] __arm64_sys_wait4+0x11c/0x2a0 kernel/exit.c:1799 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x64/0x218 arch/arm64/kernel/syscall.c:206 el0_svc+0x58/0x168 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:581 The buggy address belongs to the object at ffff00011279f590 which belongs to the cache proc_inode_cache of size 1240 The buggy address is located 1224 bytes to the right of 1240-byte region [ffff00011279f590, ffff00011279fa68) The buggy address belongs to the physical page: page:000000004b3eb4fd refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x152798 head:000000004b3eb4fd order:3 compound_mapcount:0 compound_pincount:0 memcg:ffff0000d0f94c01 flags: 0x5ffc00000010200(slab|head|node=0|zone=2|lastcpupid=0x7ff) raw: 05ffc00000010200 fffffc0004713200 dead000000000002 ffff0000c0887380 raw: 0000000000000000 0000000000170017 00000001ffffffff ffff0000d0f94c01 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff00011279fe00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff00011279fe80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff00011279ff00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff00011279ff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff0001127a0000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ================================================================== EXT4-fs (loop4): corrupt root inode, run e2fsck EXT4-fs (loop4): mount failed