================================================================== BUG: KASAN: slab-out-of-bounds in __ext4_iget+0x26c/0x3390 fs/ext4/inode.c:4716 Read of size 8 at addr ffff00012c157f30 by task syz-executor.5/9236 CPU: 0 PID: 9236 Comm: syz-executor.5 Not tainted 6.7.0-rc6-syzkaller-gaafe7ad77b91 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023 Call trace: dump_backtrace+0x1b8/0x1e4 arch/arm64/kernel/stacktrace.c:291 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:298 __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd0/0x124 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:364 [inline] print_report+0x174/0x514 mm/kasan/report.c:475 kasan_report+0xd8/0x138 mm/kasan/report.c:588 __asan_report_load8_noabort+0x20/0x2c mm/kasan/report_generic.c:381 __ext4_iget+0x26c/0x3390 fs/ext4/inode.c:4716 __ext4_fill_super fs/ext4/super.c:5482 [inline] ext4_fill_super+0x44a8/0x5818 fs/ext4/super.c:5712 get_tree_bdev+0x33c/0x4a8 fs/super.c:1598 ext4_get_tree+0x28/0x38 fs/ext4/super.c:5744 vfs_get_tree+0x90/0x288 fs/super.c:1771 do_new_mount+0x25c/0x8c8 fs/namespace.c:3337 path_mount+0x590/0xe04 fs/namespace.c:3664 do_mount fs/namespace.c:3677 [inline] __do_sys_mount fs/namespace.c:3886 [inline] __se_sys_mount fs/namespace.c:3863 [inline] __arm64_sys_mount+0x45c/0x594 fs/namespace.c:3863 __invoke_syscall arch/arm64/kernel/syscall.c:37 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:51 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:136 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:155 el0_svc+0x54/0x158 arch/arm64/kernel/entry-common.c:678 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:696 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:595 Allocated by task 8970: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4c/0x7c mm/kasan/common.c:52 kasan_save_alloc_info+0x24/0x30 mm/kasan/generic.c:511 __kasan_slab_alloc+0x74/0x8c mm/kasan/common.c:328 kasan_slab_alloc include/linux/kasan.h:188 [inline] slab_post_alloc_hook+0x90/0x498 mm/slab.h:763 slab_alloc_node mm/slub.c:3478 [inline] slab_alloc mm/slub.c:3486 [inline] __kmem_cache_alloc_lru mm/slub.c:3493 [inline] kmem_cache_alloc+0x288/0x410 mm/slub.c:3502 kmem_cache_zalloc include/linux/slab.h:711 [inline] ext4_mb_new_blocks+0x4c0/0x445c fs/ext4/mballoc.c:6171 ext4_alloc_branch fs/ext4/indirect.c:340 [inline] ext4_ind_map_blocks+0xd3c/0x2200 fs/ext4/indirect.c:635 ext4_map_blocks+0x7c4/0x1810 fs/ext4/inode.c:623 ext4_iomap_alloc fs/ext4/inode.c:3320 [inline] ext4_iomap_begin+0x65c/0xa18 fs/ext4/inode.c:3370 iomap_iter+0x5e8/0x1018 fs/iomap/iter.c:91 __iomap_dio_rw+0x1204/0x2114 fs/iomap/direct-io.c:658 iomap_dio_rw+0x5c/0xa8 fs/iomap/direct-io.c:748 ext4_dio_write_iter fs/ext4/file.c:577 [inline] ext4_file_write_iter+0x13cc/0x1740 fs/ext4/file.c:696 call_write_iter include/linux/fs.h:2020 [inline] aio_write+0x380/0x504 fs/aio.c:1582 io_submit_one+0x794/0x14f8 fs/aio.c:2001 __do_sys_io_submit fs/aio.c:2060 [inline] __se_sys_io_submit fs/aio.c:2030 [inline] __arm64_sys_io_submit+0x248/0x3c8 fs/aio.c:2030 __invoke_syscall arch/arm64/kernel/syscall.c:37 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:51 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:136 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:155 el0_svc+0x54/0x158 arch/arm64/kernel/entry-common.c:678 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:696 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:595 Freed by task 8970: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4c/0x7c mm/kasan/common.c:52 kasan_save_free_info+0x38/0x5c mm/kasan/generic.c:522 ____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:164 [inline] slab_free_hook mm/slub.c:1800 [inline] slab_free_freelist_hook mm/slub.c:1826 [inline] slab_free mm/slub.c:3809 [inline] kmem_cache_free+0x2e4/0x56c mm/slub.c:3831 ext4_mb_new_blocks+0x2140/0x445c fs/ext4/mballoc.c:6236 ext4_alloc_branch fs/ext4/indirect.c:340 [inline] ext4_ind_map_blocks+0xd3c/0x2200 fs/ext4/indirect.c:635 ext4_map_blocks+0x7c4/0x1810 fs/ext4/inode.c:623 ext4_iomap_alloc fs/ext4/inode.c:3320 [inline] ext4_iomap_begin+0x65c/0xa18 fs/ext4/inode.c:3370 iomap_iter+0x5e8/0x1018 fs/iomap/iter.c:91 __iomap_dio_rw+0x1204/0x2114 fs/iomap/direct-io.c:658 iomap_dio_rw+0x5c/0xa8 fs/iomap/direct-io.c:748 ext4_dio_write_iter fs/ext4/file.c:577 [inline] ext4_file_write_iter+0x13cc/0x1740 fs/ext4/file.c:696 call_write_iter include/linux/fs.h:2020 [inline] aio_write+0x380/0x504 fs/aio.c:1582 io_submit_one+0x794/0x14f8 fs/aio.c:2001 __do_sys_io_submit fs/aio.c:2060 [inline] __se_sys_io_submit fs/aio.c:2030 [inline] __arm64_sys_io_submit+0x248/0x3c8 fs/aio.c:2030 __invoke_syscall arch/arm64/kernel/syscall.c:37 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:51 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:136 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:155 el0_svc+0x54/0x158 arch/arm64/kernel/entry-common.c:678 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:696 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:595 The buggy address belongs to the object at ffff00012c157e58 which belongs to the cache ext4_allocation_context of size 152 The buggy address is located 64 bytes to the right of allocated 152-byte region [ffff00012c157e58, ffff00012c157ef0) The buggy address belongs to the physical page: page:000000008f16e6bb refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16c157 anon flags: 0x5ffc00000000800(slab|node=0|zone=2|lastcpupid=0x7ff) page_type: 0xffffffff() raw: 05ffc00000000800 ffff0000c4025dc0 fffffc0004c57fc0 0000000000000005 raw: 0000000000000000 0000000000120012 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff00012c157e00: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb ffff00012c157e80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc >ffff00012c157f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff00012c157f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff00012c158000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ================================================================== EXT4-fs (loop5): corrupt root inode, run e2fsck EXT4-fs (loop5): mount failed