================================================================== BUG: KASAN: slab-use-after-free in ocfs2_replay_truncate_records fs/ocfs2/alloc.c:5959 [inline] BUG: KASAN: slab-use-after-free in __ocfs2_flush_truncate_log+0x6c8/0x1168 fs/ocfs2/alloc.c:6054 Read of size 4 at addr ffff0000c7f1b2c0 by task syz-executor/6617 CPU: 1 UID: 0 PID: 6617 Comm: syz-executor Not tainted 6.12.0-rc3-syzkaller-g86cada34bc3a #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Call trace: show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:484 (C) __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0xe4/0x150 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:377 [inline] print_report+0x198/0x538 mm/kasan/report.c:488 kasan_report+0xd8/0x138 mm/kasan/report.c:601 __asan_report_load4_noabort+0x20/0x2c mm/kasan/report_generic.c:380 ocfs2_replay_truncate_records fs/ocfs2/alloc.c:5959 [inline] __ocfs2_flush_truncate_log+0x6c8/0x1168 fs/ocfs2/alloc.c:6054 ocfs2_flush_truncate_log fs/ocfs2/alloc.c:6076 [inline] ocfs2_truncate_log_shutdown+0x11c/0x2a0 fs/ocfs2/alloc.c:6320 ocfs2_dismount_volume+0x1f4/0x920 fs/ocfs2/super.c:1879 ocfs2_put_super+0xec/0x368 fs/ocfs2/super.c:1608 generic_shutdown_super+0x12c/0x2bc fs/super.c:642 kill_block_super+0x44/0x90 fs/super.c:1696 deactivate_locked_super+0xc4/0x12c fs/super.c:473 deactivate_super+0xe0/0x100 fs/super.c:506 cleanup_mnt+0x34c/0x3dc fs/namespace.c:1373 __cleanup_mnt+0x20/0x30 fs/namespace.c:1380 task_work_run+0x230/0x2e0 kernel/task_work.c:228 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] do_notify_resume+0x178/0x1f4 arch/arm64/kernel/entry-common.c:151 exit_to_user_mode_prepare arch/arm64/kernel/entry-common.c:169 [inline] exit_to_user_mode arch/arm64/kernel/entry-common.c:178 [inline] el0_svc+0xac/0x168 arch/arm64/kernel/entry-common.c:745 el0t_64_sync_handler+0x84/0x108 arch/arm64/kernel/entry-common.c:762 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600 Allocated by task 7924: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x40/0x78 mm/kasan/common.c:68 kasan_save_alloc_info+0x40/0x50 mm/kasan/generic.c:565 unpoison_slab_object mm/kasan/common.c:319 [inline] __kasan_slab_alloc+0x74/0x8c mm/kasan/common.c:345 kasan_slab_alloc include/linux/kasan.h:247 [inline] slab_post_alloc_hook mm/slub.c:4085 [inline] slab_alloc_node mm/slub.c:4134 [inline] kmem_cache_alloc_node_noprof+0x204/0x3a8 mm/slub.c:4186 __alloc_skb+0x1e0/0x420 net/core/skbuff.c:668 alloc_skb include/linux/skbuff.h:1322 [inline] alloc_uevent_skb+0x78/0x1e4 lib/kobject_uevent.c:289 uevent_net_broadcast_tagged lib/kobject_uevent.c:352 [inline] kobject_uevent_net_broadcast+0x15c/0x548 lib/kobject_uevent.c:413 kobject_uevent_env+0x530/0x894 lib/kobject_uevent.c:608 kobject_uevent+0x2c/0x3c lib/kobject_uevent.c:656 device_add+0x54c/0xa6c drivers/base/core.c:3656 netdev_register_kobject+0x15c/0x2d8 net/core/net-sysfs.c:2139 register_netdevice+0xb88/0x11a8 net/core/dev.c:10491 veth_newlink+0x50c/0xb64 drivers/net/veth.c:1830 rtnl_newlink_create net/core/rtnetlink.c:3539 [inline] __rtnl_newlink net/core/rtnetlink.c:3759 [inline] rtnl_newlink+0x1188/0x1bd0 net/core/rtnetlink.c:3772 rtnetlink_rcv_msg+0x630/0xa9c net/core/rtnetlink.c:6675 netlink_rcv_skb+0x214/0x3c4 net/netlink/af_netlink.c:2551 rtnetlink_rcv+0x28/0x38 net/core/rtnetlink.c:6693 netlink_unicast_kernel net/netlink/af_netlink.c:1331 [inline] netlink_unicast+0x668/0x8a4 net/netlink/af_netlink.c:1357 netlink_sendmsg+0x7a4/0xa8c net/netlink/af_netlink.c:1901 sock_sendmsg_nosec net/socket.c:729 [inline] __sock_sendmsg net/socket.c:744 [inline] __sys_sendto+0x374/0x4f4 net/socket.c:2214 __do_sys_sendto net/socket.c:2226 [inline] __se_sys_sendto net/socket.c:2222 [inline] __arm64_sys_sendto+0xd8/0xf8 net/socket.c:2222 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x54/0x168 arch/arm64/kernel/entry-common.c:744 el0t_64_sync_handler+0x84/0x108 arch/arm64/kernel/entry-common.c:762 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600 Freed by task 7924: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x40/0x78 mm/kasan/common.c:68 kasan_save_free_info+0x54/0x6c mm/kasan/generic.c:579 poison_slab_object mm/kasan/common.c:247 [inline] __kasan_slab_free+0x64/0x8c mm/kasan/common.c:264 kasan_slab_free include/linux/kasan.h:230 [inline] slab_free_hook mm/slub.c:2342 [inline] slab_free mm/slub.c:4579 [inline] kmem_cache_free+0x19c/0x560 mm/slub.c:4681 kfree_skbmem+0x15c/0x1ec __kfree_skb net/core/skbuff.c:1205 [inline] consume_skb+0xb8/0x130 net/core/skbuff.c:1436 netlink_broadcast_filtered+0xf68/0x10ec net/netlink/af_netlink.c:1542 netlink_broadcast+0x50/0x68 net/netlink/af_netlink.c:1564 uevent_net_broadcast_tagged lib/kobject_uevent.c:373 [inline] kobject_uevent_net_broadcast+0x4b0/0x548 lib/kobject_uevent.c:413 kobject_uevent_env+0x530/0x894 lib/kobject_uevent.c:608 kobject_uevent+0x2c/0x3c lib/kobject_uevent.c:656 device_add+0x54c/0xa6c drivers/base/core.c:3656 netdev_register_kobject+0x15c/0x2d8 net/core/net-sysfs.c:2139 register_netdevice+0xb88/0x11a8 net/core/dev.c:10491 veth_newlink+0x50c/0xb64 drivers/net/veth.c:1830 rtnl_newlink_create net/core/rtnetlink.c:3539 [inline] __rtnl_newlink net/core/rtnetlink.c:3759 [inline] rtnl_newlink+0x1188/0x1bd0 net/core/rtnetlink.c:3772 rtnetlink_rcv_msg+0x630/0xa9c net/core/rtnetlink.c:6675 netlink_rcv_skb+0x214/0x3c4 net/netlink/af_netlink.c:2551 rtnetlink_rcv+0x28/0x38 net/core/rtnetlink.c:6693 netlink_unicast_kernel net/netlink/af_netlink.c:1331 [inline] netlink_unicast+0x668/0x8a4 net/netlink/af_netlink.c:1357 netlink_sendmsg+0x7a4/0xa8c net/netlink/af_netlink.c:1901 sock_sendmsg_nosec net/socket.c:729 [inline] __sock_sendmsg net/socket.c:744 [inline] __sys_sendto+0x374/0x4f4 net/socket.c:2214 __do_sys_sendto net/socket.c:2226 [inline] __se_sys_sendto net/socket.c:2222 [inline] __arm64_sys_sendto+0xd8/0xf8 net/socket.c:2222 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x54/0x168 arch/arm64/kernel/entry-common.c:744 el0t_64_sync_handler+0x84/0x108 arch/arm64/kernel/entry-common.c:762 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600 The buggy address belongs to the object at ffff0000c7f1b280 which belongs to the cache skbuff_head_cache of size 240 The buggy address is located 64 bytes inside of freed 240-byte region [ffff0000c7f1b280, ffff0000c7f1b370) The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x107f1b flags: 0x5ffc00000000000(node=0|zone=2|lastcpupid=0x7ff) page_type: f5(slab) raw: 05ffc00000000000 ffff0000c1bdf780 dead000000000122 0000000000000000 raw: 0000000000000000 00000000000c000c 00000001f5000000 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff0000c7f1b180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff0000c7f1b200: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc >ffff0000c7f1b280: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff0000c7f1b300: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc ffff0000c7f1b380: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb ================================================================== OCFS2: ERROR (device loop3): int ocfs2_validate_gd_self(struct super_block *, struct buffer_head *, int): Group descriptor #32 has an invalid bg_blkno of 150994976 On-disk corruption discovered. Please run fsck.ocfs2 once the filesystem is unmounted. (syz-executor,6617,1):_ocfs2_free_suballoc_bits:2553 ERROR: status = -30 (syz-executor,6617,1):_ocfs2_free_clusters:2650 ERROR: status = -30 (syz-executor,6617,1):ocfs2_replay_truncate_records:5976 ERROR: status = -30 (syz-executor,6617,1):__ocfs2_flush_truncate_log:6057 ERROR: status = -30 (syz-executor,6617,1):ocfs2_truncate_log_shutdown:6322 ERROR: status = -30 ocfs2: Unmounting device (7,3) on (node local)