bisecting cause commit starting from 6e764bcd1cf72a2846c0e53d3975a09b242c04c9
building syzkaller on b599f2fcc734e2183016a340d4f6fc2891d8e41f
testing commit 6e764bcd1cf72a2846c0e53d3975a09b242c04c9
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.1
kernel signature: c7fc4fa7d121c2bb2e3f5701d39b8718d23b5031c78362d9fd1605f577277924
all runs: crashed: KASAN: use-after-free Read in netlbl_catmap_walk
testing release v5.13
testing commit 62fb9874f5da54fdb243003b386128037319b219
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.1
kernel signature: eaab50170f966c8b3eb39852b91e95d9bc7e454d96827a490e5a435720d1ffbe
all runs: crashed: KASAN: use-after-free Read in netlbl_catmap_walk
testing release v5.12
testing commit 9f4ad9e425a1d3b6a34617b8ea226d56a119a717
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.1
kernel signature: a2c67d0aa4cd9031fb2dccc0e9429d13c38be324308c26aa1ef6b084265ddb79
all runs: crashed: KASAN: use-after-free Read in netlbl_catmap_walk
testing release v5.11
testing commit f40ddce88593482919761f74910f42f4b84c004b
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.1
kernel signature: 760afc9eb3d03287b34ea942b7a411382f5645571be3e022de43df2d69784b74
all runs: crashed: KASAN: use-after-free Read in netlbl_catmap_walk
testing release v5.10
testing commit 2c85ebc57b3e1817b6ce1a6b703928e113a90442
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.1
kernel signature: ed87a01106570e960457a093defc61da2463f8df499a22d92a19e05b34bca040
all runs: crashed: KASAN: use-after-free Read in netlbl_catmap_walk
testing release v5.9
testing commit bbf5c979011a099af5dc76498918ed7df445635b
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.1
kernel signature: a6ff38e82dd9e7b72f8594f21d4456e9f130fed2d0baffe8f9a1ac831a8846b8
all runs: crashed: KASAN: use-after-free Read in netlbl_catmap_walk
testing release v5.8
testing commit bcf876870b95592b52519ed4aafcf9d95999bc9c
compiler: gcc (GCC) 8.4.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.1
kernel signature: 148af9454d2419d8c534f359dc0ada77e2a0b73e26499bd1d569517b33bb77e1
all runs: crashed: KASAN: use-after-free Read in _netlbl_catmap_getnode
testing release v5.7
testing commit 3d77e6a8804abcc0504c904bd6e5cdf3a5cf8162
compiler: gcc version 8.4.1 20210217 (GCC), GNU ld (GNU Binutils for Debian) 2.35.1
kernel signature: c39813ac1b4cf9ee17cd9581d29834c9312d7a9e2d37c5149682cd29e326d445
run #0: crashed: KASAN: use-after-free Read in _netlbl_catmap_getnode
run #1: crashed: KASAN: use-after-free Read in _netlbl_catmap_getnode
run #2: crashed: KASAN: use-after-free Read in _netlbl_catmap_getnode
run #3: crashed: KASAN: use-after-free Read in _netlbl_catmap_getnode
run #4: crashed: KASAN: use-after-free Read in _netlbl_catmap_getnode
run #5: crashed: KASAN: use-after-free Read in _netlbl_catmap_getnode
run #6: crashed: KASAN: use-after-free Read in _netlbl_catmap_getnode
run #7: crashed: KASAN: use-after-free Read in _netlbl_catmap_getnode
run #8: crashed: KASAN: use-after-free Read in netlbl_catmap_walk
run #9: crashed: KASAN: use-after-free Read in _netlbl_catmap_getnode
testing release v5.6
testing commit 7111951b8d4973bda27ff663f2cf18b663d15b48
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 65e9f41c1707ffe281e68adea77024db743fc3aec52e15a3092851b775aa1091
all runs: crashed: KASAN: use-after-free Read in _netlbl_catmap_getnode
testing release v5.5
testing commit d5226fa6dbae0569ee43ecfc08bdcd6770fc4755
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: df229a265ef77d7ea04c00e82025c3f1c0476396510a270bc6ec4e905f5dd17e
all runs: crashed: KASAN: use-after-free Read in _netlbl_catmap_getnode
testing release v5.4
testing commit 219d54332a09e8d8741c1e1982f5eae56099de85
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 4db262e20e001154554aacba8ee069cf005e1d0d472bd35a6ff08601ed7ef2f2
all runs: crashed: KASAN: use-after-free Read in _netlbl_catmap_getnode
testing release v5.3
testing commit 4d856f72c10ecb060868ed10ff1b1453943fc6c8
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 8a03cb69477372e7c3f6c0fee23e5ea1b68880d5ca37439f59113cf3c4eda96e
run #0: crashed: KASAN: use-after-free Read in _netlbl_catmap_getnode
run #1: crashed: KASAN: use-after-free Read in _netlbl_catmap_getnode
run #2: crashed: KASAN: use-after-free Read in _netlbl_catmap_getnode
run #3: crashed: KASAN: use-after-free Read in _netlbl_catmap_getnode
run #4: crashed: KASAN: use-after-free Read in _netlbl_catmap_getnode
run #5: crashed: KASAN: use-after-free Read in _netlbl_catmap_getnode
run #6: crashed: KASAN: use-after-free Read in netlbl_catmap_walk
run #7: crashed: KASAN: use-after-free Read in _netlbl_catmap_getnode
run #8: crashed: KASAN: use-after-free Read in _netlbl_catmap_getnode
run #9: crashed: KASAN: use-after-free Read in _netlbl_catmap_getnode
testing release v5.2
testing commit 0ecfebd2b52404ae0c54a878c872bb93363ada36
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: a63def1637c68d4b2393eca6fa64f291c241df7444f98d045fce92c45e3140a6
run #0: crashed: KASAN: use-after-free Read in _netlbl_catmap_getnode
run #1: crashed: KASAN: use-after-free Read in _netlbl_catmap_getnode
run #2: crashed: KASAN: use-after-free Read in _netlbl_catmap_getnode
run #3: crashed: KASAN: use-after-free Read in _netlbl_catmap_getnode
run #4: crashed: KASAN: use-after-free Read in _netlbl_catmap_getnode
run #5: crashed: KASAN: use-after-free Read in _netlbl_catmap_getnode
run #6: crashed: KASAN: use-after-free Read in _netlbl_catmap_getnode
run #7: crashed: KASAN: use-after-free Read in _netlbl_catmap_getnode
run #8: crashed: KASAN: use-after-free Read in netlbl_catmap_walk
run #9: crashed: KASAN: use-after-free Read in _netlbl_catmap_getnode
testing release v5.1
testing commit e93c9c99a629c61837d5a7fc2120cd2b6c70dbdd
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: f8efdfe78b77cd25d04aab4225a16b81c92c36c009eef26f6201701b40898542
all runs: crashed: KASAN: use-after-free Read in _netlbl_catmap_getnode
testing release v5.0
testing commit 1c163f4c7b3f621efff9b28a47abb36f7378d783
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 8febb2553a8c0a5b6ddbcecc9d82d1b651fdece6c7b63653a085e30edb3aa2ec
all runs: crashed: KASAN: use-after-free Read in _netlbl_catmap_getnode
testing release v4.20
testing commit 8fe28cb58bcb235034b64cbbb7550a8a43fd88be
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 088c9c1f2727cdad9bcf18d7cbc3fa61081c4539479271be1acc28655005b7ed
run #0: crashed: KASAN: use-after-free Read in _netlbl_catmap_getnode
run #1: crashed: KASAN: use-after-free Read in _netlbl_catmap_getnode
run #2: crashed: KASAN: use-after-free Read in _netlbl_catmap_getnode
run #3: crashed: KASAN: use-after-free Read in _netlbl_catmap_getnode
run #4: crashed: KASAN: use-after-free Read in _netlbl_catmap_getnode
run #5: crashed: KASAN: use-after-free Read in netlbl_catmap_walk
run #6: crashed: KASAN: use-after-free Read in _netlbl_catmap_getnode
run #7: crashed: KASAN: use-after-free Read in _netlbl_catmap_getnode
run #8: crashed: KASAN: use-after-free Read in _netlbl_catmap_getnode
run #9: crashed: KASAN: use-after-free Read in _netlbl_catmap_getnode
testing release v4.19
testing commit 84df9525b0c27f3ebc2ebb1864fa62a97fdedb7d
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 5c26584e6e520dc04ff242183f0bd78fe383ad683cd050b63c38841a5c02c78b
run #0: crashed: KASAN: use-after-free Read in _netlbl_catmap_getnode
run #1: crashed: KASAN: use-after-free Read in _netlbl_catmap_getnode
run #2: crashed: KASAN: use-after-free Read in netlbl_catmap_walk
run #3: crashed: KASAN: use-after-free Read in _netlbl_catmap_getnode
run #4: crashed: KASAN: use-after-free Read in _netlbl_catmap_getnode
run #5: crashed: KASAN: use-after-free Read in _netlbl_catmap_getnode
run #6: crashed: KASAN: use-after-free Read in _netlbl_catmap_getnode
run #7: crashed: KASAN: use-after-free Read in _netlbl_catmap_getnode
run #8: crashed: KASAN: use-after-free Read in _netlbl_catmap_getnode
run #9: crashed: KASAN: use-after-free Read in _netlbl_catmap_getnode
testing release v4.18
testing commit 94710cac0ef4ee177a63b5227664b38c95bbf703
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: c48b919a2ad7b3c65ad10b0e078710499ec2a7c280038026840523979d42eda8
all runs: crashed: KASAN: use-after-free Read in _netlbl_catmap_getnode
testing release v4.17
testing commit 29dcea88779c856c7dc92040a0c01233263101d4
failed to run ["make" "-j" "64" "ARCH=x86_64" "CC=/syzkaller/shared/bisect_bin/gcc-8.1.0/bin/gcc" "bzImage"]: exit status 2
testing release v4.16
testing commit 0adb32858b0bddf4ada5f364a84ed60b196dbcda
elf.c:135:2: error: 'elf_getshnum' is deprecated [-Werror=deprecated-declarations]
elf.c:140:2: error: 'elf_getshstrndx' is deprecated [-Werror=deprecated-declarations]
orc_dump.c:106:2: error: 'elf_getshnum' is deprecated [-Werror=deprecated-declarations]
orc_dump.c:111:2: error: 'elf_getshstrndx' is deprecated [-Werror=deprecated-declarations]
testing release v4.15
testing commit d8a5b80568a9cb66810e75b182018e9edb68e8ff
orc_dump.c:106:2: error: 'elf_getshnum' is deprecated [-Werror=deprecated-declarations]
orc_dump.c:111:2: error: 'elf_getshstrndx' is deprecated [-Werror=deprecated-declarations]
elf.c:135:2: error: 'elf_getshnum' is deprecated [-Werror=deprecated-declarations]
elf.c:140:2: error: 'elf_getshstrndx' is deprecated [-Werror=deprecated-declarations]
pager.c:36:12: error: passing argument 2 to 'restrict'-qualified parameter aliases with argument 4 [-Werror=restrict]
testing release v4.14
testing commit bebc6082da0a9f5d47a1ea2edc099bf671058bd4
orc_dump.c:105:2: error: 'elf_getshnum' is deprecated [-Werror=deprecated-declarations]
orc_dump.c:110:2: error: 'elf_getshstrndx' is deprecated [-Werror=deprecated-declarations]
elf.c:134:2: error: 'elf_getshnum' is deprecated [-Werror=deprecated-declarations]
elf.c:139:2: error: 'elf_getshstrndx' is deprecated [-Werror=deprecated-declarations]
pager.c:36:12: error: passing argument 2 to 'restrict'-qualified parameter aliases with argument 4 [-Werror=restrict]
testing release v4.13
testing commit 569dbb88e80deb68974ef6fdd6a13edb9d686261
elf.c:144:2: error: 'elf_getshnum' is deprecated [-Werror=deprecated-declarations]
elf.c:149:2: error: 'elf_getshstrndx' is deprecated [-Werror=deprecated-declarations]
pager.c:35:12: error: passing argument 2 to 'restrict'-qualified parameter aliases with argument 4 [-Werror=restrict]
testing release v4.12
testing commit 6f7da290413ba713f0cdd9ff1a2a9bb129ef4f6c
pager.c:35:12: error: passing argument 2 to 'restrict'-qualified parameter aliases with argument 4 [-Werror=restrict]
elf.c:141:2: error: 'elf_getshnum' is deprecated [-Werror=deprecated-declarations]
elf.c:146:2: error: 'elf_getshstrndx' is deprecated [-Werror=deprecated-declarations]
testing release v4.11
testing commit a351e9b9fc24e982ec2f0e76379a49826036da12
pager.c:35:12: error: passing argument 2 to 'restrict'-qualified parameter aliases with argument 4 [-Werror=restrict]
elf.c:141:2: error: 'elf_getshnum' is deprecated [-Werror=deprecated-declarations]
elf.c:146:2: error: 'elf_getshstrndx' is deprecated [-Werror=deprecated-declarations]
testing release v4.10
testing commit c470abd4fde40ea6a0846a2beab642a578c0b8cd
tools/include/linux/log2.h:19:1: error: ignoring attribute 'noreturn' because it conflicts with attribute 'const' [-Werror=attributes]
elf.c:129:2: error: 'elf_getshnum' is deprecated [-Werror=deprecated-declarations]
elf.c:134:2: error: 'elf_getshstrndx' is deprecated [-Werror=deprecated-declarations]
pager.c:35:12: error: passing argument 2 to 'restrict'-qualified parameter aliases with argument 4 [-Werror=restrict]
testing release v4.9
testing commit 69973b830859bc6529a7a0468ba0d80ee5117826
tools/include/linux/log2.h:19:1: error: ignoring attribute 'noreturn' because it conflicts with attribute 'const' [-Werror=attributes]
elf.c:129:2: error: 'elf_getshnum' is deprecated [-Werror=deprecated-declarations]
elf.c:134:2: error: 'elf_getshstrndx' is deprecated [-Werror=deprecated-declarations]
pager.c:35:12: error: passing argument 2 to 'restrict'-qualified parameter aliases with argument 4 [-Werror=restrict]
testing release v4.8
testing commit c8d2bc9bc39ebea8437fd974fdbc21847bb897a3
tools/include/linux/log2.h:19:1: error: ignoring attribute 'noreturn' because it conflicts with attribute 'const' [-Werror=attributes]
elf.c:129:2: error: 'elf_getshnum' is deprecated [-Werror=deprecated-declarations]
elf.c:134:2: error: 'elf_getshstrndx' is deprecated [-Werror=deprecated-declarations]
pager.c:33:12: error: passing argument 2 to 'restrict'-qualified parameter aliases with argument 4 [-Werror=restrict]
testing release v4.7
testing commit 523d939ef98fd712632d93a5a2b588e477a7565e
tools/include/linux/log2.h:19:1: error: ignoring attribute 'noreturn' because it conflicts with attribute 'const' [-Werror=attributes]
elf.c:122:2: error: 'elf_getshnum' is deprecated [-Werror=deprecated-declarations]
elf.c:127:2: error: 'elf_getshstrndx' is deprecated [-Werror=deprecated-declarations]
pager.c:33:12: error: passing argument 2 to 'restrict'-qualified parameter aliases with argument 4 [-Werror=restrict]
testing release v4.6
testing commit 2dcd0af568b0cf583645c8a317dd12e344b1c72a
tools/include/linux/log2.h:19:1: error: ignoring attribute 'noreturn' because it conflicts with attribute 'const' [-Werror=attributes]
pager.c:33:12: error: passing argument 2 to 'restrict'-qualified parameter aliases with argument 4 [-Werror=restrict]
revisions tested: 18, total time: 3h6m16.008803174s (build: 2h3m0.794700346s, test: 57m57.308709488s)
the crash already happened on the oldest tested release
commit msg: Linux 4.18
crash: KASAN: use-after-free Read in _netlbl_catmap_getnode
Bluetooth: hci1: command 0x0419 tx timeout
Bluetooth: hci5: command 0x0419 tx timeout
Bluetooth: hci4: command 0x0419 tx timeout
Bluetooth: hci2: command 0x0419 tx timeout
==================================================================
BUG: KASAN: use-after-free in _netlbl_catmap_getnode+0x254/0x330 net/netlabel/netlabel_kapi.c:578
Read of size 4 at addr ffff8800a5334f00 by task syz-executor.4/12314

CPU: 1 PID: 12314 Comm: syz-executor.4 Not tainted 4.18.0-syzkaller #0
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+0x15a/0x20d lib/dump_stack.c:113
 print_address_description.cold.6+0x9/0x244 mm/kasan/report.c:256
 kasan_report_error mm/kasan/report.c:354 [inline]
 kasan_report mm/kasan/report.c:412 [inline]
 kasan_report.cold.7+0x242/0x305 mm/kasan/report.c:396
 __asan_report_load4_noabort+0x14/0x20 mm/kasan/report.c:432
 _netlbl_catmap_getnode+0x254/0x330 net/netlabel/netlabel_kapi.c:578
 netlbl_catmap_walk+0x78/0x260 net/netlabel/netlabel_kapi.c:629
 cipso_seq_show+0x155/0x1a0 security/smack/smackfs.c:818
 traverse+0x2f6/0x950 fs/seq_file.c:114
 seq_lseek+0x122/0x3e0 fs/seq_file.c:337
 vfs_llseek fs/read_write.c:300 [inline]
 ksys_lseek+0xc8/0x150 fs/read_write.c:313
 __do_sys_lseek fs/read_write.c:324 [inline]
 __se_sys_lseek fs/read_write.c:322 [inline]
 __x64_sys_lseek+0x6e/0xb0 fs/read_write.c:322
 do_syscall_64+0xda/0x540 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x4665e9
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 bc ff ff ff f7 d8 64 89 01 48 
RSP: 002b:00007f085aa17188 EFLAGS: 00000246 ORIG_RAX: 0000000000000008
RAX: ffffffffffffffda RBX: 000000000056c038 RCX: 00000000004665e9
RDX: 0000000000000000 RSI: 0000000100000001 RDI: 0000000000000003
RBP: 00000000004bfcc4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056c038
R13: 00007fffc737e6ff R14: 00007f085aa17300 R15: 0000000000022000

Allocated by task 12313:
 save_stack mm/kasan/kasan.c:448 [inline]
 set_track mm/kasan/kasan.c:460 [inline]
 kasan_kmalloc.part.1+0x62/0xf0 mm/kasan/kasan.c:553
 kasan_kmalloc+0xaf/0xc0 mm/kasan/kasan.c:538
 kmem_cache_alloc_trace+0x142/0x350 mm/slub.c:2735
 kmalloc include/linux/slab.h:513 [inline]
 kzalloc include/linux/slab.h:707 [inline]
 netlbl_catmap_alloc include/net/netlabel.h:331 [inline]
 _netlbl_catmap_getnode+0x11b/0x330 net/netlabel/netlabel_kapi.c:596
 netlbl_catmap_setbit+0x17/0xb0 net/netlabel/netlabel_kapi.c:790
 smk_netlbl_mls+0xfe/0x200 security/smack/smack_access.c:506
 smk_set_cipso.isra.10+0x3cf/0x540 security/smack/smackfs.c:933
 smk_write_cipso+0x14/0x20 security/smack/smackfs.c:960
 __vfs_write+0xe3/0x880 fs/read_write.c:485
 vfs_write+0x150/0x4f0 fs/read_write.c:549
 ksys_write+0xcd/0x1b0 fs/read_write.c:598
 __do_sys_write fs/read_write.c:610 [inline]
 __se_sys_write fs/read_write.c:607 [inline]
 __x64_sys_write+0x6e/0xb0 fs/read_write.c:607
 do_syscall_64+0xda/0x540 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe

Freed by task 12309:
 save_stack mm/kasan/kasan.c:448 [inline]
 set_track mm/kasan/kasan.c:460 [inline]
 __kasan_slab_free+0x167/0x240 mm/kasan/kasan.c:521
 kasan_slab_free+0xe/0x10 mm/kasan/kasan.c:528
 slab_free_hook mm/slub.c:1373 [inline]
 slab_free_freelist_hook mm/slub.c:1400 [inline]
 slab_free mm/slub.c:2955 [inline]
 kfree+0x130/0x3b0 mm/slub.c:3908
 netlbl_catmap_free include/net/netlabel.h:349 [inline]
 smk_set_cipso.isra.10+0x444/0x540 security/smack/smackfs.c:935
 smk_write_cipso+0x14/0x20 security/smack/smackfs.c:960
 __vfs_write+0xe3/0x880 fs/read_write.c:485
 vfs_write+0x150/0x4f0 fs/read_write.c:549
 ksys_write+0xcd/0x1b0 fs/read_write.c:598
 __do_sys_write fs/read_write.c:610 [inline]
 __se_sys_write fs/read_write.c:607 [inline]
 __x64_sys_write+0x6e/0xb0 fs/read_write.c:607
 do_syscall_64+0xda/0x540 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe

The buggy address belongs to the object at ffff8800a5334f00
 which belongs to the cache kmalloc-64 of size 64
The buggy address is located 0 bytes inside of
 64-byte region [ffff8800a5334f00, ffff8800a5334f40)
The buggy address belongs to the page:
page:ffffea000294cd00 count:1 mapcount:0 mapping:ffff88013fe11600 index:0x0
flags: 0xfff00000000100(slab)
raw: 00fff00000000100 0000000000000000 0000000f00000001 ffff88013fe11600
raw: 0000000000000000 00000000802a002a 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page allocated via order 0, migratetype Unmovable, gfp_mask 0x6012c0(GFP_KERNEL|__GFP_NOWARN|__GFP_NORETRY)
 set_page_owner include/linux/page_owner.h:31 [inline]
 post_alloc_hook mm/page_alloc.c:1906 [inline]
 prep_new_page mm/page_alloc.c:1914 [inline]
 get_page_from_freelist+0x2f35/0x46b0 mm/page_alloc.c:3345
 __alloc_pages_nodemask+0x39e/0x2780 mm/page_alloc.c:4369
 alloc_pages_current+0xd6/0x1b0 mm/mempolicy.c:2093
 alloc_pages include/linux/gfp.h:492 [inline]
 alloc_slab_page mm/slub.c:1440 [inline]
 allocate_slab mm/slub.c:1585 [inline]
 new_slab+0x4a9/0x850 mm/slub.c:1656
 new_slab_objects mm/slub.c:2419 [inline]
 ___slab_alloc+0x609/0x940 mm/slub.c:2571
 __slab_alloc.isra.22+0x78/0xe0 mm/slub.c:2611
 slab_alloc_node mm/slub.c:2674 [inline]
 __kmalloc_node+0xef/0x530 mm/slub.c:3794
 kmalloc_node include/linux/slab.h:555 [inline]
 kvmalloc_node+0x68/0x70 mm/util.c:423
 kvmalloc include/linux/mm.h:576 [inline]
 kvzalloc include/linux/mm.h:584 [inline]
 allocate_hook_entries_size+0x30/0x70 net/netfilter/core.c:60
 nf_hook_entries_grow+0x3eb/0x860 net/netfilter/core.c:127
 __nf_register_net_hook+0x117/0x340 net/netfilter/core.c:336
 nf_register_net_hook+0x45/0xb0 net/netfilter/core.c:463
 nf_register_net_hooks+0x44/0xa0 net/netfilter/core.c:479
 arpt_register_table+0x203/0x2b0 net/ipv4/netfilter/arp_tables.c:1561
 arptable_filter_table_init.part.0+0x3f/0x60 net/ipv4/netfilter/arptable_filter.c:52
 arptable_filter_table_init+0x3d/0x50 net/ipv4/netfilter/arptable_filter.c:56

Memory state around the buggy address:
 ffff8800a5334e00: fb fb fb fb fc fc fc fc fb fb fb fb fb fb fb fb
 ffff8800a5334e80: fc fc fc fc fb fb fb fb fb fb fb fb fc fc fc fc
>ffff8800a5334f00: fb fb fb fb fb fb fb fb fc fc fc fc fb fb fb fb
                   ^
 ffff8800a5334f80: fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc fc
 ffff8800a5335000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
==================================================================