================================================================== BUG: KASAN: slab-out-of-bounds in udf_write_aext+0x4c0/0x668 fs/udf/inode.c:2088 Write of size 4 at addr ffff0001130b7ff0 by task syz-executor.4/13649 CPU: 0 PID: 13649 Comm: syz-executor.4 Not tainted 6.2.0-syzkaller-18295-ga9b06ec42c0f #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/21/2023 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+0xd0/0x124 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:306 [inline] print_report+0x178/0x4e0 mm/kasan/report.c:417 kasan_report+0xd4/0x130 mm/kasan/report.c:517 __asan_report_store_n_noabort+0x28/0x34 mm/kasan/report_generic.c:367 udf_write_aext+0x4c0/0x668 fs/udf/inode.c:2088 udf_add_entry+0x11e0/0x28b0 fs/udf/namei.c:482 udf_mkdir+0x158/0x7e0 fs/udf/namei.c:681 vfs_mkdir+0x334/0x4e4 fs/namei.c:4036 do_mkdirat+0x200/0x5f8 fs/namei.c:4061 __do_sys_mkdirat fs/namei.c:4076 [inline] __se_sys_mkdirat fs/namei.c:4074 [inline] __arm64_sys_mkdirat+0x90/0xa8 fs/namei.c:4074 __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+0x64/0x198 arch/arm64/kernel/syscall.c:193 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+0x190/0x194 arch/arm64/kernel/entry.S:591 Allocated by task 6042: 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:512 __kasan_slab_alloc+0x74/0x8c mm/kasan/common.c:328 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook+0x80/0x4e0 mm/slab.h:761 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+0x288/0x37c mm/slub.c:3476 rds_tcp_data_recv+0x144/0x894 net/rds/tcp_recv.c:173 tcp_read_sock+0x1bc/0x8ac net/ipv4/tcp.c:1705 rds_tcp_read_sock net/rds/tcp_recv.c:276 [inline] rds_tcp_data_ready+0x2ac/0x5f0 net/rds/tcp_recv.c:325 tcp_data_ready+0x22c/0x450 net/ipv4/tcp_input.c:5006 tcp_data_queue+0x1cc8/0x53e4 net/ipv4/tcp_input.c:5080 tcp_rcv_established+0xce0/0x2310 net/ipv4/tcp_input.c:6017 tcp_v6_do_rcv+0x444/0x1184 net/ipv6/tcp_ipv6.c:1487 sk_backlog_rcv include/net/sock.h:1113 [inline] __release_sock+0x1a8/0x408 net/core/sock.c:2930 release_sock+0x68/0x1cc net/core/sock.c:3486 tcp_sock_set_cork+0x100/0x188 net/ipv4/tcp.c:3343 rds_tcp_xmit_path_prepare+0x7c/0x8c net/rds/tcp_send.c:45 rds_send_xmit+0x35c/0x2260 net/rds/send.c:194 rds_send_worker+0x84/0x36c net/rds/threads.c:200 process_one_work+0x848/0x16b4 kernel/workqueue.c:2289 worker_thread+0x8e4/0xfec kernel/workqueue.c:2436 kthread+0x24c/0x2d4 kernel/kthread.c:376 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:870 Freed by task 6042: 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:523 ____kasan_slab_free+0x144/0x20c 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:1781 [inline] slab_free_freelist_hook mm/slub.c:1807 [inline] slab_free mm/slub.c:3787 [inline] kmem_cache_free+0x328/0x638 mm/slub.c:3809 rds_tcp_inc_free+0x30/0x40 net/rds/tcp_recv.c:56 rds_inc_put+0xf8/0x184 net/rds/recv.c:82 rds_tcp_data_recv+0x740/0x894 net/rds/tcp_recv.c:250 tcp_read_sock+0x1bc/0x8ac net/ipv4/tcp.c:1705 rds_tcp_read_sock net/rds/tcp_recv.c:276 [inline] rds_tcp_data_ready+0x2ac/0x5f0 net/rds/tcp_recv.c:325 tcp_data_ready+0x22c/0x450 net/ipv4/tcp_input.c:5006 tcp_data_queue+0x1cc8/0x53e4 net/ipv4/tcp_input.c:5080 tcp_rcv_established+0xce0/0x2310 net/ipv4/tcp_input.c:6017 tcp_v6_do_rcv+0x444/0x1184 net/ipv6/tcp_ipv6.c:1487 sk_backlog_rcv include/net/sock.h:1113 [inline] __release_sock+0x1a8/0x408 net/core/sock.c:2930 release_sock+0x68/0x1cc net/core/sock.c:3486 tcp_sock_set_cork+0x100/0x188 net/ipv4/tcp.c:3343 rds_tcp_xmit_path_prepare+0x7c/0x8c net/rds/tcp_send.c:45 rds_send_xmit+0x35c/0x2260 net/rds/send.c:194 rds_send_worker+0x84/0x36c net/rds/threads.c:200 process_one_work+0x848/0x16b4 kernel/workqueue.c:2289 worker_thread+0x8e4/0xfec kernel/workqueue.c:2436 kthread+0x24c/0x2d4 kernel/kthread.c:376 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:870 The buggy address belongs to the object at ffff0001130b7ea0 which belongs to the cache rds_tcp_incoming of size 248 The buggy address is located 88 bytes to the right of 248-byte region [ffff0001130b7ea0, ffff0001130b7f98) The buggy address belongs to the physical page: page:00000000ce904d77 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1530b7 flags: 0x5ffc00000000200(slab|node=0|zone=2|lastcpupid=0x7ff) raw: 05ffc00000000200 ffff0000d2882000 dead000000000122 0000000000000000 raw: 0000000000000000 00000000000d000d 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff0001130b7e80: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb ffff0001130b7f00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff0001130b7f80: fb fb fb fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff0001130b8000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff0001130b8080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ==================================================================