Warning: Permanently added '[localhost]:24914' (ECDSA) to the list of known hosts. syzkaller login: [ 101.803050][ T46] kauditd_printk_skb: 7 callbacks suppressed [ 101.803063][ T46] audit: type=1400 audit(1609072102.931:42): avc: denied { map } for pid=10186 comm="syz-fuzzer" path="/syz-fuzzer" dev="sda1" ino=16526 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:file_t:s0 tclass=file permissive=1 2020/12/27 12:28:22 fuzzer started [ 102.373597][T10186] ================================================================================ [ 102.385785][T10186] UBSAN: invalid-load in kernel/params.c:302:33 [ 102.394171][T10186] load of value 255 is not a valid value for type '_Bool' [ 102.404371][T10186] CPU: 0 PID: 10186 Comm: syz-fuzzer Not tainted 5.10.0-syzkaller #0 [ 102.413284][T10186] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.12.0-59-gc9ba5276e321-prebuilt.qemu.org 04/01/2014 [ 102.414297][T10186] Call Trace: [ 102.414297][T10186] dump_stack+0x107/0x163 [ 102.414297][T10186] ubsan_epilogue+0xb/0x5a [ 102.414297][T10186] __ubsan_handle_load_invalid_value.cold+0x62/0x6c [ 102.414297][T10186] param_get_bool.cold+0x14/0x19 [ 102.414297][T10186] param_attr_show+0x14a/0x220 [ 102.414297][T10186] ? kernel_param_unlock+0x40/0x40 [ 102.414297][T10186] module_attr_show+0x48/0x70 [ 102.414297][T10186] ? func_ptr_is_kernel_text+0x80/0x80 [ 102.414297][T10186] sysfs_kf_seq_show+0x1f8/0x400 [ 102.414297][T10186] seq_read_iter+0x4d3/0x1220 [ 102.414297][T10186] seq_read+0x3dd/0x5b0 [ 102.414297][T10186] ? seq_read_iter+0x1220/0x1220 [ 102.414297][T10186] ? __sanitizer_cov_trace_const_cmp1+0x22/0x80 [ 102.414297][T10186] ? selinux_file_permission+0xcc/0x5a0 [ 102.414297][T10186] kernfs_fop_read+0xe9/0x590 [ 102.414297][T10186] ? rw_verify_area+0x11d/0x350 [ 102.414297][T10186] ? kernfs_vma_page_mkwrite+0x230/0x230 [ 102.414297][T10186] vfs_read+0x1b5/0x570 [ 102.414297][T10186] ksys_read+0x12d/0x250 [ 102.414297][T10186] ? vfs_write+0xa80/0xa80 [ 102.414297][T10186] ? syscall_enter_from_user_mode+0x1d/0x50 [ 102.414297][T10186] do_syscall_64+0x2d/0x70 [ 102.414297][T10186] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 102.414297][T10186] RIP: 0033:0x4ad4a0 [ 102.414297][T10186] Code: 8b 7c 24 10 48 8b 74 24 18 48 8b 54 24 20 49 c7 c2 00 00 00 00 49 c7 c0 00 00 00 00 49 c7 c1 00 00 00 00 48 8b 44 24 08 0f 05 <48> 3d 01 f0 ff ff 76 20 48 c7 44 24 28 ff ff ff ff 48 c7 44 24 30 [ 102.414297][T10186] RSP: 002b:000000c0003d5678 EFLAGS: 00000212 ORIG_RAX: 0000000000000000 [ 102.414297][T10186] RAX: ffffffffffffffda RBX: 000000c00001e500 RCX: 00000000004ad4a0 [ 102.414297][T10186] RDX: 0000000000001200 RSI: 000000c000363300 RDI: 0000000000000003 [ 102.414297][T10186] RBP: 000000c0003d56c8 R08: 0000000000000000 R09: 0000000000000000 [ 102.414297][T10186] R10: 0000000000000000 R11: 0000000000000212 R12: ffffffffffffffff [ 102.414297][T10186] R13: 0000000000000002 R14: 0000000000000001 R15: 0000000000000005 [ 102.671635][T10186] ================================================================================ [ 102.684366][T10186] Kernel panic - not syncing: panic_on_warn set ... [ 102.691442][T10186] CPU: 2 PID: 10186 Comm: syz-fuzzer Not tainted 5.10.0-syzkaller #0 [ 102.694233][T10186] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.12.0-59-gc9ba5276e321-prebuilt.qemu.org 04/01/2014 [ 102.694233][T10186] Call Trace: [ 102.694233][T10186] dump_stack+0x107/0x163 [ 102.694233][T10186] panic+0x343/0x77f [ 102.694233][T10186] ? __warn_printk+0xf3/0xf3 [ 102.694233][T10186] ? ubsan_epilogue+0x3e/0x5a [ 102.694233][T10186] ubsan_epilogue+0x54/0x5a [ 102.694233][T10186] __ubsan_handle_load_invalid_value.cold+0x62/0x6c [ 102.694233][T10186] param_get_bool.cold+0x14/0x19 [ 102.694233][T10186] param_attr_show+0x14a/0x220 [ 102.694233][T10186] ? kernel_param_unlock+0x40/0x40 [ 102.694233][T10186] module_attr_show+0x48/0x70 [ 102.694233][T10186] ? func_ptr_is_kernel_text+0x80/0x80 [ 102.694233][T10186] sysfs_kf_seq_show+0x1f8/0x400 [ 102.694233][T10186] seq_read_iter+0x4d3/0x1220 [ 102.694233][T10186] seq_read+0x3dd/0x5b0 [ 102.694233][T10186] ? seq_read_iter+0x1220/0x1220 [ 102.694233][T10186] ? __sanitizer_cov_trace_const_cmp1+0x22/0x80 [ 102.694233][T10186] ? selinux_file_permission+0xcc/0x5a0 [ 102.694233][T10186] kernfs_fop_read+0xe9/0x590 [ 102.694233][T10186] ? rw_verify_area+0x11d/0x350 [ 102.694233][T10186] ? kernfs_vma_page_mkwrite+0x230/0x230 [ 102.694233][T10186] vfs_read+0x1b5/0x570 [ 102.694233][T10186] ksys_read+0x12d/0x250 [ 102.694233][T10186] ? vfs_write+0xa80/0xa80 [ 102.694233][T10186] ? syscall_enter_from_user_mode+0x1d/0x50 [ 102.694233][T10186] do_syscall_64+0x2d/0x70 [ 102.852188][T10186] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 102.852188][T10186] RIP: 0033:0x4ad4a0 [ 102.852188][T10186] Code: 8b 7c 24 10 48 8b 74 24 18 48 8b 54 24 20 49 c7 c2 00 00 00 00 49 c7 c0 00 00 00 00 49 c7 c1 00 00 00 00 48 8b 44 24 08 0f 05 <48> 3d 01 f0 ff ff 76 20 48 c7 44 24 28 ff ff ff ff 48 c7 44 24 30 [ 102.852188][T10186] RSP: 002b:000000c0003d5678 EFLAGS: 00000212 ORIG_RAX: 0000000000000000 [ 102.852188][T10186] RAX: ffffffffffffffda RBX: 000000c00001e500 RCX: 00000000004ad4a0 [ 102.852188][T10186] RDX: 0000000000001200 RSI: 000000c000363300 RDI: 0000000000000003 [ 102.852188][T10186] RBP: 000000c0003d56c8 R08: 0000000000000000 R09: 0000000000000000 [ 102.852188][T10186] R10: 0000000000000000 R11: 0000000000000212 R12: ffffffffffffffff [ 102.852188][T10186] R13: 0000000000000002 R14: 0000000000000001 R15: 0000000000000005 [ 102.852188][T10186] Kernel Offset: disabled [ 102.852188][T10186] Rebooting in 86400 seconds.. VM DIAGNOSIS: 12:28:24 Registers: info registers vcpu 0 RAX=000000000000005d RBX=0000000000000000 RCX=0000000000000000 RDX=00000000000003f8 RSI=ffffffff841a5371 RDI=ffffffff9042abe0 RBP=ffffffff9042aba0 RSP=ffffc900014576c0 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff841a5362 R11=000000000000001f R12=000000000000005d R13=0000000000000000 R14=ffffffff9042aba0 R15=dffffc0000000000 RIP=ffffffff841a539c RFL=00000002 [-------] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 ffffffff 00c00000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 ffffffff 00c00000 FS =0000 0000000001ad4c30 ffffffff 00c00000 GS =0000 ffff88802ca00000 ffffffff 00c00000 LDT=0000 0000000000000000 ffffffff 00c00000 TR =0040 fffffe0000003000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000001000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007fd6671d08c0 CR3=0000000015cd8000 CR4=00350ef0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000fffe0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001fa0 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=00000000000000000000000000000000 XMM01=000000c00015f3800000000000000001 XMM02=6574656d617261702f6d766b2f656c75 XMM03=73656761705f656775685f786e2f7372 XMM04=00000000004fb0cb00000000004ce60a XMM05=000000000060b23b00000000004faf60 XMM06=0000000000850991000000000060a39b XMM07=000000000045c0c100000000004300ce XMM08=000000000000000e000000c00009af70 XMM09=0000000000000005000000c00009ac07 XMM10=000000000000000e000000c00009af80 XMM11=000000000000000b000000c00009af90 XMM12=0000000000000010000000c00009afa0 XMM13=000000c0000140f00000000000000001 XMM14=000000c0003860300000000000000005 XMM15=00000000000000010000000000000001 info registers vcpu 1 RAX=0000000000042b3d RBX=ffff8880112b8380 RCX=ffffffff8912cca0 RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000000 RBP=ffffed1002257070 RSP=ffffc9000041fdf8 R8 =0000000000000001 R9 =ffff88802cb35c6b R10=ffffed1005966b8d R11=0000000000000000 R12=0000000000000001 R13=0000000000000001 R14=ffffffff8d7bd6c8 R15=0000000000000000 RIP=ffffffff8915233e RFL=00000202 [-------] CPL=0 II=0 A20=1 SMM=0 HLT=1 ES =0000 0000000000000000 ffffffff 00c00000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 ffffffff 00c00000 FS =0000 0000000000000000 ffffffff 00c00000 GS =0000 ffff88802cb00000 ffffffff 00c00000 LDT=0000 0000000000000000 00000000 00000000 TR =0040 fffffe000003e000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe000003c000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=0000000000400040 CR3=0000000015cd8000 CR4=00350ee0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000fffe0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001fa0 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=00000000000000000000000000000000 XMM01=00000000000000003f70c6f7a0b5ed8d XMM02=000000000000000043e0000000000000 XMM03=000000c0000d0b40000000c00007c990 XMM04=000000c0000cafc0000000c0000caf90 XMM05=000000c0000cb020000000c0000caff0 XMM06=000000c0000cb080000000c0000cb050 XMM07=000000c0000d1680000000c00007c9c0 XMM08=000000c0000cb200000000c0000cb1d0 XMM09=000000c0000cb260000000c0000cb230 XMM10=000000c0000cb290000000c00007c9f0 XMM11=000000c0000cb2f0000000c0000cb2c0 XMM12=000000c0000cb350000000c0000cb320 XMM13=000000c0000cb3b0000000c0000cb380 XMM14=000000c0000cb410000000c0000cb3e0 XMM15=000000c00007ca20000000c0000cb440 info registers vcpu 2 RAX=0000000000037335 RBX=ffff8880112bc3c0 RCX=ffffffff8912cca0 RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000000 RBP=ffffed1002257878 RSP=ffffc9000042fdf8 R8 =0000000000000001 R9 =ffff88802cc35c6b R10=ffffed1005986b8d R11=0000000000000000 R12=0000000000000002 R13=0000000000000002 R14=ffffffff8d7bd6c8 R15=0000000000000000 RIP=ffffffff8915233e RFL=00000206 [-----P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 ES =0000 0000000000000000 ffffffff 00c00000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 ffffffff 00c00000 FS =0000 0000000000000000 ffffffff 00c00000 GS =0000 ffff88802cc00000 ffffffff 00c00000 LDT=0000 0000000000000000 00000000 00000000 TR =0040 fffffe0000079000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000077000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=0000000001243010 CR3=0000000015cd8000 CR4=00350ee0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000fffe0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001fa0 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=00000000000000000000000000000000 XMM01=00000000000000000000000000000000 XMM02=0000000000000000c1162e42fefa39ef XMM03=0000000000000000414fffffe0000000 XMM04=61636f6c2f7273752f3a6e6962732f6c XMM05=3a6e6962732f7273752f3a6e69622f6c XMM06=2f3a6e6962732f3a6e69622f7273752f XMM07=3131582f6e69622f7273752f3a6e6962 XMM08=00000000000000000000000000000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 3 RAX=000000000003743f RBX=ffff8880112e0400 RCX=ffffffff8912cca0 RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000000 RBP=ffffed100225c080 RSP=ffffc9000043fdf8 R8 =0000000000000001 R9 =ffff88802cd35c6b R10=ffffed10059a6b8d R11=0000000000000000 R12=0000000000000003 R13=0000000000000003 R14=ffffffff8d7bd6c8 R15=0000000000000000 RIP=ffffffff8915233e RFL=00000206 [-----P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 ES =0000 0000000000000000 ffffffff 00c00000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 ffffffff 00c00000 FS =0000 0000000000000000 ffffffff 00c00000 GS =0000 ffff88802cd00000 ffffffff 00c00000 LDT=0000 0000000000000000 00000000 00000000 TR =0040 fffffe00000b4000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe00000b2000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007fd667065008 CR3=0000000015cd8000 CR4=00350ee0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000fffe0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001fa0 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=00000000000000000000000000000000 XMM01=00000000000000003f70c6f7a0b5ed8d XMM02=000000000000000043e0000000000000 XMM03=0000000000000000414d5aa41999999a XMM04=00000000000000003fd197287a542bcf XMM05=000000c000102060000000c000102030 XMM06=00000000000000003fd3333333333333 XMM07=00000000000000003fd029c3bba365bd XMM08=00000000000000003fe30df7127078fa XMM09=00000000000000003fbed61ef9ea2e38 XMM10=00000000000000003fd8148929efff10 XMM11=000000c0000bcb10000000c0000bcae0 XMM12=000000c0000bcb40000000c00007c600 XMM13=000000c0000bcba0000000c0000bcb70 XMM14=000000c0000bcc00000000c0000bcbd0 XMM15=000000c0000c2120000000c0000bcc30