================================================================== BUG: KASAN: slab-out-of-bounds in atomic_inc include/asm-generic/atomic-instrumented.h:109 [inline] BUG: KASAN: slab-out-of-bounds in extBalloc fs/jfs/jfs_extent.c:557 [inline] BUG: KASAN: slab-out-of-bounds in extAlloc+0xb8e/0xdb0 fs/jfs/jfs_extent.c:138 Write of size 4 at addr ffff8880494610d8 by task syz-executor.2/26683 CPU: 1 PID: 26683 Comm: syz-executor.2 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1fc/0x2ef lib/dump_stack.c:118 print_address_description.cold+0x54/0x219 mm/kasan/report.c:256 kasan_report_error.cold+0x8a/0x1b9 mm/kasan/report.c:354 kasan_report+0x8f/0xa0 mm/kasan/report.c:412 atomic_inc include/asm-generic/atomic-instrumented.h:109 [inline] extBalloc fs/jfs/jfs_extent.c:557 [inline] extAlloc+0xb8e/0xdb0 fs/jfs/jfs_extent.c:138 jfs_get_block+0x1f5/0xae0 fs/jfs/inode.c:258 nobh_write_begin+0x446/0x1030 fs/buffer.c:2619 jfs_write_begin+0x3e/0x1a0 fs/jfs/inode.c:323 generic_perform_write+0x1f8/0x4d0 mm/filemap.c:3170 __generic_file_write_iter+0x24b/0x610 mm/filemap.c:3295 generic_file_write_iter+0x3f8/0x730 mm/filemap.c:3323 call_write_iter include/linux/fs.h:1821 [inline] new_sync_write fs/read_write.c:474 [inline] __vfs_write+0x51b/0x770 fs/read_write.c:487 vfs_write+0x1f3/0x540 fs/read_write.c:549 ksys_write+0x12b/0x2a0 fs/read_write.c:599 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f215ef9c5a9 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f215d90f168 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007f215f0bcf80 RCX: 00007f215ef9c5a9 RDX: 000000000208e24b RSI: 0000000020000480 RDI: 0000000000000004 RBP: 00007f215eff7580 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffe32ad023f R14: 00007f215d90f300 R15: 0000000000022000 Allocated by task 26683: kmem_cache_alloc_trace+0x12f/0x380 mm/slab.c:3625 kmalloc include/linux/slab.h:515 [inline] dbMount+0x4d/0x880 fs/jfs/jfs_dmap.c:176 jfs_mount+0x124/0x3d0 fs/jfs/jfs_mount.c:133 jfs_fill_super+0x55c/0xb50 fs/jfs/super.c:589 sysfs: cannot create duplicate filename '/class/ieee80211/©,í…×;qO!' mount_bdev+0x2fc/0x3b0 fs/super.c:1158 mount_fs+0xa3/0x310 fs/super.c:1261 vfs_kern_mount.part.0+0x68/0x470 fs/namespace.c:961 vfs_kern_mount fs/namespace.c:951 [inline] do_new_mount fs/namespace.c:2492 [inline] do_mount+0x115c/0x2f50 fs/namespace.c:2822 ksys_mount+0xcf/0x130 fs/namespace.c:3038 __do_sys_mount fs/namespace.c:3052 [inline] __se_sys_mount fs/namespace.c:3049 [inline] __x64_sys_mount+0xba/0x150 fs/namespace.c:3049 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe Freed by task 25834: __cache_free mm/slab.c:3503 [inline] kfree+0xcc/0x210 mm/slab.c:3822 skb_free_head net/core/skbuff.c:563 [inline] skb_release_data+0x6de/0x920 net/core/skbuff.c:583 CPU: 0 PID: 26707 Comm: syz-executor.4 Not tainted 4.19.211-syzkaller #0 skb_release_all net/core/skbuff.c:640 [inline] __kfree_skb+0x46/0x60 net/core/skbuff.c:654 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022 Call Trace: sk_wmem_free_skb include/net/sock.h:1468 [inline] tcp_rtx_queue_unlink_and_free include/net/tcp.h:1769 [inline] tcp_clean_rtx_queue net/ipv4/tcp_input.c:3160 [inline] tcp_ack+0x1d1e/0x51d0 net/ipv4/tcp_input.c:3695 __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1fc/0x2ef lib/dump_stack.c:118 tcp_rcv_established+0x66b/0x1ef0 net/ipv4/tcp_input.c:5670 sysfs_warn_dup.cold+0x1c/0x29 fs/sysfs/dir.c:30 tcp_v4_do_rcv+0x5d6/0x870 net/ipv4/tcp_ipv4.c:1547 sysfs_do_create_link_sd+0x116/0x130 fs/sysfs/symlink.c:50 tcp_v4_rcv+0x2c03/0x3b80 net/ipv4/tcp_ipv4.c:1832 sysfs_do_create_link fs/sysfs/symlink.c:79 [inline] sysfs_create_link+0x5f/0xc0 fs/sysfs/symlink.c:91 ip_local_deliver_finish+0x495/0xc00 net/ipv4/ip_input.c:215 device_add_class_symlinks drivers/base/core.c:1934 [inline] device_add+0x7d1/0x16d0 drivers/base/core.c:2136 NF_HOOK include/linux/netfilter.h:289 [inline] ip_local_deliver+0x188/0x500 net/ipv4/ip_input.c:256 dst_input include/net/dst.h:461 [inline] ip_rcv_finish+0x1ca/0x2e0 net/ipv4/ip_input.c:414 NF_HOOK include/linux/netfilter.h:289 [inline] ip_rcv+0xca/0x3c0 net/ipv4/ip_input.c:524 wiphy_register+0x1664/0x2130 net/wireless/core.c:832 __netif_receive_skb_one_core+0x114/0x180 net/core/dev.c:4954 __netif_receive_skb+0x27/0x1c0 net/core/dev.c:5066 netif_receive_skb_internal+0xf0/0x3f0 net/core/dev.c:5156 napi_skb_finish net/core/dev.c:5601 [inline] napi_gro_receive+0x2e6/0x450 net/core/dev.c:5632 receive_buf+0xc2c/0x6780 drivers/net/virtio_net.c:1088 virtnet_receive drivers/net/virtio_net.c:1352 [inline] virtnet_poll+0x568/0xe00 drivers/net/virtio_net.c:1457 ieee80211_register_hw+0x13be/0x3550 net/mac80211/main.c:1106 napi_poll net/core/dev.c:6280 [inline] net_rx_action+0x4ac/0xfb0 net/core/dev.c:6346 __do_softirq+0x265/0x980 kernel/softirq.c:292 The buggy address belongs to the object at ffff888049460a00 which belongs to the cache kmalloc-2048 of size 2048 The buggy address is located 1752 bytes inside of 2048-byte region [ffff888049460a00, ffff888049461200) mac80211_hwsim_new_radio+0x1d3f/0x3c60 drivers/net/wireless/mac80211_hwsim.c:2896 The buggy address belongs to the page: page:ffffea0001251800 count:1 mapcount:0 mapping:ffff88813bff0c40 index:0x0 compound_mapcount: 0 flags: 0xfff00000008100(slab|head) raw: 00fff00000008100 ffffea000231aa08 ffffea0002bc0708 ffff88813bff0c40 hwsim_new_radio_nl+0x5c3/0x850 drivers/net/wireless/mac80211_hwsim.c:3374 raw: 0000000000000000 ffff888049460180 0000000100000003 0000000000000000 page dumped because: kasan: bad access detected genl_family_rcv_msg+0x642/0xc40 net/netlink/genetlink.c:602 Memory state around the buggy address: ffff888049460f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff888049461000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff888049461080: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc ^ genl_rcv_msg+0xbf/0x160 net/netlink/genetlink.c:627 ffff888049461100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc netlink_rcv_skb+0x160/0x440 net/netlink/af_netlink.c:2463 ffff888049461180: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================