================================================================== BUG: KASAN: slab-out-of-bounds in atomic_read include/asm-generic/atomic-instrumented.h:26 [inline] BUG: KASAN: slab-out-of-bounds in atomic_fetch_add_unless include/linux/atomic-fallback.h:1086 [inline] BUG: KASAN: slab-out-of-bounds in atomic_add_unless include/linux/atomic-fallback.h:1111 [inline] BUG: KASAN: slab-out-of-bounds in atomic_inc_not_zero include/linux/atomic-fallback.h:1127 [inline] BUG: KASAN: slab-out-of-bounds in dst_hold_safe include/net/dst.h:297 [inline] BUG: KASAN: slab-out-of-bounds in ip6_hold_safe+0xad/0x380 net/ipv6/route.c:1050 Read of size 4 at addr ffff88809a4e58c0 by task syz-executor.4/10183 CPU: 1 PID: 10183 Comm: syz-executor.4 Not tainted 5.2.0-rc1+ #5 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x172/0x1f0 lib/dump_stack.c:113 print_address_description.cold+0x7c/0x20d mm/kasan/report.c:188 __kasan_report.cold+0x1b/0x40 mm/kasan/report.c:317 kasan_report+0x12/0x20 mm/kasan/common.c:614 check_memory_region_inline mm/kasan/generic.c:185 [inline] check_memory_region+0x123/0x190 mm/kasan/generic.c:191 kasan_check_read+0x11/0x20 mm/kasan/common.c:94 atomic_read include/asm-generic/atomic-instrumented.h:26 [inline] atomic_fetch_add_unless include/linux/atomic-fallback.h:1086 [inline] atomic_add_unless include/linux/atomic-fallback.h:1111 [inline] atomic_inc_not_zero include/linux/atomic-fallback.h:1127 [inline] dst_hold_safe include/net/dst.h:297 [inline] ip6_hold_safe+0xad/0x380 net/ipv6/route.c:1050 rt6_get_pcpu_route net/ipv6/route.c:1277 [inline] ip6_pol_route+0x336/0x1050 net/ipv6/route.c:2028 ip6_pol_route_input+0x65/0x80 net/ipv6/route.c:2047 fib6_rule_lookup+0x133/0x5a0 net/ipv6/fib6_rules.c:116 ip6_route_input_lookup+0xb7/0xd0 net/ipv6/route.c:2059 ip6_route_input+0x5e2/0x9e0 net/ipv6/route.c:2194 ip6_rcv_finish_core.isra.0+0x174/0x590 net/ipv6/ip6_input.c:67 ip6_rcv_finish+0x17a/0x310 net/ipv6/ip6_input.c:78 NF_HOOK include/linux/netfilter.h:305 [inline] NF_HOOK include/linux/netfilter.h:299 [inline] ipv6_rcv+0x10e/0x420 net/ipv6/ip6_input.c:276 __netif_receive_skb_one_core+0x113/0x1a0 net/core/dev.c:4990 __netif_receive_skb+0x2c/0x1d0 net/core/dev.c:5104 netif_receive_skb_internal+0x117/0x5c0 net/core/dev.c:5207 napi_frags_finish net/core/dev.c:5774 [inline] napi_gro_frags+0xada/0xd10 net/core/dev.c:5848 tun_get_user+0x2f3c/0x3ff0 drivers/net/tun.c:1991 tun_chr_write_iter+0xbd/0x156 drivers/net/tun.c:2037 call_write_iter include/linux/fs.h:1872 [inline] do_iter_readv_writev+0x5f8/0x8f0 fs/read_write.c:693 do_iter_write fs/read_write.c:970 [inline] do_iter_write+0x184/0x610 fs/read_write.c:951 vfs_writev+0x1b3/0x2f0 fs/read_write.c:1015 do_writev+0x15b/0x330 fs/read_write.c:1058 __do_sys_writev fs/read_write.c:1131 [inline] __se_sys_writev fs/read_write.c:1128 [inline] __x64_sys_writev+0x75/0xb0 fs/read_write.c:1128 do_syscall_64+0xfd/0x680 arch/x86/entry/common.c:301 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x459131 Code: 75 14 b8 14 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 34 b9 fb ff c3 48 83 ec 08 e8 fa 2c 00 00 48 89 04 24 b8 14 00 00 00 0f 05 <48> 8b 3c 24 48 89 c2 e8 43 2d 00 00 48 89 d0 48 83 c4 08 48 3d 01 RSP: 002b:00007f1e8da0aba0 EFLAGS: 00000293 ORIG_RAX: 0000000000000014 RAX: ffffffffffffffda RBX: 000000000000003e RCX: 0000000000459131 RDX: 0000000000000001 RSI: 00007f1e8da0ac00 RDI: 00000000000000f0 RBP: 000000000075bfc0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000293 R12: 00007f1e8da0b6d4 R13: 00000000004c7d21 R14: 00000000004de160 R15: 00000000ffffffff Allocated by task 1: save_stack+0x23/0x90 mm/kasan/common.c:71 set_track mm/kasan/common.c:79 [inline] __kasan_kmalloc mm/kasan/common.c:489 [inline] __kasan_kmalloc.constprop.0+0xcf/0xe0 mm/kasan/common.c:462 kasan_kmalloc+0x9/0x10 mm/kasan/common.c:503 __do_kmalloc_node mm/slab.c:3620 [inline] __kmalloc_node+0x4e/0x70 mm/slab.c:3627 kmalloc_node include/linux/slab.h:590 [inline] kvmalloc_node+0xbd/0x100 mm/util.c:431 kvmalloc include/linux/mm.h:637 [inline] lzo_alloc_ctx crypto/lzo.c:35 [inline] lzo_init+0x23/0xd0 crypto/lzo.c:46 __crypto_alloc_tfm+0x346/0x530 crypto/api.c:378 crypto_alloc_base+0x7a/0x250 crypto/api.c:432 crypto_alloc_comp include/linux/crypto.h:1797 [inline] zswap_cpu_comp_prepare+0xb1/0x1c0 mm/zswap.c:415 cpuhp_invoke_callback+0x40c/0x1af0 kernel/cpu.c:181 cpuhp_issue_call+0x442/0x590 kernel/cpu.c:1620 __cpuhp_state_add_instance_cpuslocked+0x1ca/0x3b0 kernel/cpu.c:1682 __cpuhp_state_add_instance+0xd0/0x1c0 kernel/cpu.c:1703 cpuhp_state_add_instance include/linux/cpuhotplug.h:293 [inline] zswap_pool_create+0x24b/0x450 mm/zswap.c:552 __zswap_pool_create_fallback mm/zswap.c:613 [inline] init_zswap+0x307/0x603 mm/zswap.c:1334 do_one_initcall+0x107/0x7ba init/main.c:915 do_initcall_level init/main.c:983 [inline] do_initcalls init/main.c:991 [inline] do_basic_setup init/main.c:1009 [inline] kernel_init_freeable+0x4d4/0x5c3 init/main.c:1169 kernel_init+0x12/0x1c5 init/main.c:1087 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352 Freed by task 0: (stack is not available) The buggy address belongs to the object at ffff88809a4e0180 which belongs to the cache kmalloc-16k of size 16384 The buggy address is located 5952 bytes to the right of 16384-byte region [ffff88809a4e0180, ffff88809a4e4180) The buggy address belongs to the page: page:ffffea0002693800 refcount:1 mapcount:0 mapping:ffff8880aa402200 index:0x0 compound_mapcount: 0 flags: 0x1fffc0000010200(slab|head) raw: 01fffc0000010200 ffffea00026bce08 ffffea0002693a08 ffff8880aa402200 raw: 0000000000000000 ffff88809a4e0180 0000000100000001 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff88809a4e5780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88809a4e5800: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff88809a4e5880: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff88809a4e5900: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88809a4e5980: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================