gfs2: fsid=syz:syz.0: first mount done, others may mount ================================================================== BUG: KASAN: slab-out-of-bounds in should_fault_in_pages fs/gfs2/file.c:784 [inline] BUG: KASAN: slab-out-of-bounds in gfs2_file_buffered_write+0x505/0x850 fs/gfs2/file.c:1069 Read of size 8 at addr ffff888066665700 by task syz.4.145/4823 CPU: 1 PID: 4823 Comm: syz.4.145 Not tainted 5.15.171-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e3/0x2d0 lib/dump_stack.c:106 print_address_description+0x63/0x3b0 mm/kasan/report.c:248 __kasan_report mm/kasan/report.c:434 [inline] kasan_report+0x16b/0x1c0 mm/kasan/report.c:451 should_fault_in_pages fs/gfs2/file.c:784 [inline] gfs2_file_buffered_write+0x505/0x850 fs/gfs2/file.c:1069 gfs2_file_write_iter+0x4a2/0xf10 fs/gfs2/file.c:1165 do_iter_readv_writev+0x594/0x7a0 do_iter_write+0x1e6/0x760 fs/read_write.c:855 iter_file_splice_write+0x806/0xfa0 fs/splice.c:689 do_splice_from fs/splice.c:767 [inline] direct_splice_actor+0xe3/0x1c0 fs/splice.c:936 splice_direct_to_actor+0x500/0xc10 fs/splice.c:891 do_splice_direct+0x285/0x3d0 fs/splice.c:979 do_sendfile+0x622/0x1000 fs/read_write.c:1249 __do_sys_sendfile64 fs/read_write.c:1317 [inline] __se_sys_sendfile64+0x178/0x1e0 fs/read_write.c:1303 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7fc8f5a0c719 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fc8f3e84038 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 RAX: ffffffffffffffda RBX: 00007fc8f5bc3f80 RCX: 00007fc8f5a0c719 RDX: 0000000000000000 RSI: 0000000000000007 RDI: 0000000000000006 RBP: 00007fc8f5a7f39e R08: 0000000000000000 R09: 0000000000000000 R10: 0001000000201005 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fc8f5bc3f80 R15: 00007ffd9e7c1428 Allocated by task 4823: kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track mm/kasan/common.c:46 [inline] set_alloc_info mm/kasan/common.c:434 [inline] ____kasan_kmalloc+0xba/0xf0 mm/kasan/common.c:513 kasan_kmalloc include/linux/kasan.h:264 [inline] __kmalloc+0x168/0x300 mm/slub.c:4407 kmalloc_array include/linux/slab.h:631 [inline] kcalloc include/linux/slab.h:660 [inline] iter_file_splice_write+0x27b/0xfa0 fs/splice.c:628 do_splice_from fs/splice.c:767 [inline] direct_splice_actor+0xe3/0x1c0 fs/splice.c:936 splice_direct_to_actor+0x500/0xc10 fs/splice.c:891 do_splice_direct+0x285/0x3d0 fs/splice.c:979 do_sendfile+0x622/0x1000 fs/read_write.c:1249 __do_sys_sendfile64 fs/read_write.c:1317 [inline] __se_sys_sendfile64+0x178/0x1e0 fs/read_write.c:1303 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 Last potentially related work creation: kasan_save_stack+0x36/0x60 mm/kasan/common.c:38 kasan_record_aux_stack+0xba/0x100 mm/kasan/generic.c:348 kvfree_call_rcu+0x118/0x8a0 kernel/rcu/tree.c:3596 drop_sysctl_table+0x317/0x460 fs/proc/proc_sysctl.c:1678 drop_sysctl_table+0x329/0x460 fs/proc/proc_sysctl.c:1681 unregister_sysctl_table+0x88/0x130 fs/proc/proc_sysctl.c:1716 neigh_sysctl_unregister+0x74/0x90 net/core/neighbour.c:3732 devinet_sysctl_unregister net/ipv4/devinet.c:2655 [inline] inetdev_event+0xe3b/0x1490 net/ipv4/devinet.c:1619 notifier_call_chain kernel/notifier.c:83 [inline] raw_notifier_call_chain+0xd0/0x170 kernel/notifier.c:391 call_netdevice_notifiers_info net/core/dev.c:2018 [inline] call_netdevice_notifiers_extack net/core/dev.c:2030 [inline] call_netdevice_notifiers net/core/dev.c:2044 [inline] dev_change_name+0x709/0x9c0 net/core/dev.c:1301 do_setlink+0x9b4/0x3d80 net/core/rtnetlink.c:2756 __rtnl_newlink net/core/rtnetlink.c:3447 [inline] rtnl_newlink+0x17d6/0x2070 net/core/rtnetlink.c:3569 rtnetlink_rcv_msg+0x993/0xee0 net/core/rtnetlink.c:5647 netlink_rcv_skb+0x1cf/0x410 net/netlink/af_netlink.c:2504 netlink_unicast_kernel net/netlink/af_netlink.c:1326 [inline] netlink_unicast+0x7b6/0x980 net/netlink/af_netlink.c:1352 netlink_sendmsg+0xa30/0xd60 net/netlink/af_netlink.c:1920 sock_sendmsg_nosec net/socket.c:704 [inline] __sock_sendmsg net/socket.c:716 [inline] __sys_sendto+0x564/0x720 net/socket.c:2063 __do_sys_sendto net/socket.c:2075 [inline] __se_sys_sendto net/socket.c:2071 [inline] __x64_sys_sendto+0xda/0xf0 net/socket.c:2071 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 The buggy address belongs to the object at ffff888066665600 which belongs to the cache kmalloc-256 of size 256 The buggy address is located 0 bytes to the right of 256-byte region [ffff888066665600, ffff888066665700) The buggy address belongs to the page: page:ffffea0001999900 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x66664 head:ffffea0001999900 order:1 compound_mapcount:0 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000010200 ffffea000092b480 0000000300000003 ffff888017041b40 raw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 1, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 4174, ts 53515163282, free_ts 11608058135 prep_new_page mm/page_alloc.c:2426 [inline] get_page_from_freelist+0x3b78/0x3d40 mm/page_alloc.c:4192 __alloc_pages+0x272/0x700 mm/page_alloc.c:5464 alloc_slab_page mm/slub.c:1775 [inline] allocate_slab mm/slub.c:1912 [inline] new_slab+0xbb/0x4b0 mm/slub.c:1975 ___slab_alloc+0x6f6/0xe10 mm/slub.c:3008 __slab_alloc mm/slub.c:3095 [inline] slab_alloc_node mm/slub.c:3186 [inline] slab_alloc mm/slub.c:3228 [inline] __kmalloc+0x1c9/0x300 mm/slub.c:4403 kmalloc include/linux/slab.h:596 [inline] kzalloc include/linux/slab.h:721 [inline] new_dir fs/proc/proc_sysctl.c:952 [inline] get_subdir fs/proc/proc_sysctl.c:997 [inline] __register_sysctl_table+0x9f1/0x1220 fs/proc/proc_sysctl.c:1346 __devinet_sysctl_register+0x1d3/0x2a0 net/ipv4/devinet.c:2603 devinet_sysctl_register+0x13a/0x1a0 net/ipv4/devinet.c:2643 inetdev_init+0x282/0x4a0 net/ipv4/devinet.c:277 inetdev_event+0x29b/0x1490 net/ipv4/devinet.c:1543 notifier_call_chain kernel/notifier.c:83 [inline] raw_notifier_call_chain+0xd0/0x170 kernel/notifier.c:391 call_netdevice_notifiers_info net/core/dev.c:2018 [inline] call_netdevice_notifiers_extack net/core/dev.c:2030 [inline] call_netdevice_notifiers+0x145/0x1b0 net/core/dev.c:2044 register_netdevice+0x12e8/0x1720 net/core/dev.c:10396 nsim_init_netdevsim drivers/net/netdevsim/netdev.c:317 [inline] nsim_create+0x329/0x3e0 drivers/net/netdevsim/netdev.c:365 __nsim_dev_port_add+0x6de/0xb90 drivers/net/netdevsim/dev.c:1312 nsim_dev_port_add_all+0x35/0x110 drivers/net/netdevsim/dev.c:1372 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1340 [inline] free_pcp_prepare mm/page_alloc.c:1391 [inline] free_unref_page_prepare+0xc34/0xcf0 mm/page_alloc.c:3317 free_unref_page+0x95/0x2d0 mm/page_alloc.c:3396 free_contig_range+0x95/0xf0 mm/page_alloc.c:9383 destroy_args+0xfe/0x980 mm/debug_vm_pgtable.c:1018 debug_vm_pgtable+0x40d/0x470 mm/debug_vm_pgtable.c:1331 do_one_initcall+0x22b/0x7a0 init/main.c:1302 do_initcall_level+0x157/0x210 init/main.c:1375 do_initcalls+0x49/0x90 init/main.c:1391 kernel_init_freeable+0x425/0x5c0 init/main.c:1615 kernel_init+0x19/0x290 init/main.c:1506 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287 Memory state around the buggy address: ffff888066665600: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff888066665680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff888066665700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff888066665780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff888066665800: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ==================================================================