Subject: kernel BUG at arch/x86/mm/physaddr.c:LINE! (4)

From: syzbot <[email-masked]>
Date: Fri, 21 Feb 2020 17:13:12 -0800

Hello,

syzbot found the following crash on:

HEAD commit:    36a44bcd Merge branch 'bnxt_en-shutdown-and-kexec-kdump-re..
git tree:       net
console output: https://syzkaller.appspot.com/x/log.txt?x=12524265e00000
kernel config:  https://syzkaller.appspot.com/x/.config?x=768cc3d3e277cc16
dashboard link: https://syzkaller.appspot.com/bug?extid=1f4d90ead370d72e450b
compiler:       gcc (GCC) 9.0.0 20181231 (experimental)
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=123d9de9e00000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=1648fe09e00000

IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: [email-masked]

------------[ cut here ]------------
kernel BUG at arch/x86/mm/physaddr.c:28!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 9873 Comm: syz-executor039 Not tainted 5.6.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:__phys_addr+0xb3/0x120 arch/x86/mm/physaddr.c:28
Code: 09 4c 89 e3 31 ff 48 d3 eb 48 89 de e8 36 e2 40 00 48 85 db 75 0f e8 8c e0 40 00 4c 89 e0 5b 41 5c 41 5d 5d c3 e8 7d e0 40 00 <0f> 0b e8 76 e0 40 00 48 c7 c0 10 50 a7 89 48 ba 00 00 00 00 00 fc
RSP: 0018:ffffc90005b47490 EFLAGS: 00010093
RAX: ffff8880944f4600 RBX: 0000000002777259 RCX: ffffffff8134ad32
RDX: 0000000000000000 RSI: ffffffff8134ad93 RDI: 0000000000000006
RBP: ffffc90005b474a8 R08: ffff8880944f4600 R09: ffffed1015d2707c
R10: ffffed1015d2707b R11: ffff8880ae9383db R12: 0000778002777259
R13: 0000000082777259 R14: ffff88809a765000 R15: 0000000000000010
FS:  0000000001436880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000200004c0 CR3: 0000000096da8000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 virt_to_head_page include/linux/mm.h:721 [inline]
 virt_to_cache mm/slab.h:472 [inline]
 kfree+0x7b/0x2c0 mm/slab.c:3749
 audit_free_lsm_field kernel/auditfilter.c:76 [inline]
 audit_free_rule kernel/auditfilter.c:91 [inline]
 audit_data_to_entry+0xb7b/0x25f0 kernel/auditfilter.c:603
 audit_rule_change+0x6b5/0x1130 kernel/auditfilter.c:1130
 audit_receive_msg+0xda5/0x28b0 kernel/audit.c:1368
 audit_receive+0x114/0x230 kernel/audit.c:1513
 netlink_unicast_kernel net/netlink/af_netlink.c:1303 [inline]
 netlink_unicast+0x59e/0x7e0 net/netlink/af_netlink.c:1329
 netlink_sendmsg+0x91c/0xea0 net/netlink/af_netlink.c:1918
 sock_sendmsg_nosec net/socket.c:652 [inline]
 sock_sendmsg+0xd7/0x130 net/socket.c:672
 ____sys_sendmsg+0x753/0x880 net/socket.c:2343
 ___sys_sendmsg+0x100/0x170 net/socket.c:2397
 __sys_sendmsg+0x105/0x1d0 net/socket.c:2430
 __do_sys_sendmsg net/socket.c:2439 [inline]
 __se_sys_sendmsg net/socket.c:2437 [inline]
 __x64_sys_sendmsg+0x78/0xb0 net/socket.c:2437
 do_syscall_64+0xfa/0x790 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x4401a9
Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 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 0f 83 fb 13 fc ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007ffd66553d28 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004401a9
RDX: 0000000000000000 RSI: 00000000200004c0 RDI: 0000000000000003
RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401a30
R13: 0000000000401ac0 R14: 0000000000000000 R15: 0000000000000000
Modules linked in:
---[ end trace 1e4db35053a9d748 ]---
RIP: 0010:__phys_addr+0xb3/0x120 arch/x86/mm/physaddr.c:28
Code: 09 4c 89 e3 31 ff 48 d3 eb 48 89 de e8 36 e2 40 00 48 85 db 75 0f e8 8c e0 40 00 4c 89 e0 5b 41 5c 41 5d 5d c3 e8 7d e0 40 00 <0f> 0b e8 76 e0 40 00 48 c7 c0 10 50 a7 89 48 ba 00 00 00 00 00 fc
RSP: 0018:ffffc90005b47490 EFLAGS: 00010093
RAX: ffff8880944f4600 RBX: 0000000002777259 RCX: ffffffff8134ad32
RDX: 0000000000000000 RSI: ffffffff8134ad93 RDI: 0000000000000006
RBP: ffffc90005b474a8 R08: ffff8880944f4600 R09: ffffed1015d2707c
R10: ffffed1015d2707b R11: ffff8880ae9383db R12: 0000778002777259
R13: 0000000082777259 R14: ffff88809a765000 R15: 0000000000000010
FS:  0000000001436880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000200004c0 CR3: 0000000096da8000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400

---
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