syzkaller login: [ 31.045877] BUG: Bad rss-counter state mm:000000003170ba16 type:MM_FILEPAGES val:33 [ 31.047205] BUG: Bad rss-counter state mm:000000003170ba16 type:MM_ANONPAGES val:22 [ 31.222788] ================================================================== [ 31.223853] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.224953] Read of size 8 at addr ffff88800eac1058 by task sshd/222 [ 31.225808] [ 31.226045] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.227001] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.228097] Call Trace: [ 31.228449] [ 31.228762] dump_stack_lvl+0x91/0xf0 [ 31.229304] print_report+0xcc/0x620 [ 31.229839] ? __virt_addr_valid+0x102/0x340 [ 31.230448] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.231128] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.231813] kasan_report+0xbe/0xf0 [ 31.232361] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.233054] vma_interval_tree_remove+0xc75/0xec0 [ 31.233715] vma_prepare+0xc54/0x11a0 [ 31.234236] __split_vma+0x5af/0x950 [ 31.234760] ? __pfx___split_vma+0x10/0x10 [ 31.235342] ? find_held_lock+0x2c/0x110 [ 31.235924] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.236544] ? lock_is_held_type+0x9f/0x120 [ 31.237142] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.237819] ? mtree_range_walk+0x632/0x900 [ 31.238432] ? mas_walk+0x5c7/0x7c0 [ 31.238966] do_vmi_munmap+0x1f1/0x2b0 [ 31.239519] mmap_region+0x1f9/0x2660 [ 31.240065] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.240633] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.241423] ? __pfx_lock_acquire+0x10/0x10 [ 31.242016] ? __pfx_mmap_region+0x10/0x10 [ 31.242659] ? security_mmap_addr+0x7d/0xa0 [ 31.243248] ? get_unmapped_area+0x1f5/0x3f0 [ 31.243855] do_mmap+0x854/0xf00 [ 31.244372] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.244918] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.245541] ksys_mmap_pgoff+0x3af/0x500 [ 31.246103] do_syscall_64+0x3f/0x90 [ 31.246669] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.247388] RIP: 0033:0x7fa5b3a46d82 [ 31.247904] Code: eb aa 66 0f 1f 44 00 00 41 f7 c1 ff 0f 00 00 75 27 55 48 89 fd 53 89 cb 48 85 ff 74 33 41 89 da 48 89 ef b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 56 5b 5d c3 0f 1f 00 c7 05 ae 03 01 00 16 00 [ 31.250490] RSP: 002b:00007ffe6b1e3cd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.251499] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa5b3a46d82 [ 31.252484] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa5b2e80000 [ 31.253427] RBP: 00007fa5b2e80000 R08: 0000000000000009 R09: 0000000000001000 [ 31.254405] R10: 0000000000000812 R11: 0000000000000206 R12: 000055872f694ec0 [ 31.255348] R13: 00007ffe6b1e3cf0 R14: 00007ffe6b1e3d20 R15: 00007ffe6b1e4080 [ 31.256303] [ 31.256626] [ 31.256863] Allocated by task 215: [ 31.257338] kasan_save_stack+0x22/0x50 [ 31.257898] kasan_set_track+0x25/0x30 [ 31.258477] __kasan_slab_alloc+0x59/0x70 [ 31.259059] kmem_cache_alloc+0x16b/0x370 [ 31.259625] vm_area_dup+0x20/0x160 [ 31.260141] __split_vma+0x170/0x950 [ 31.260655] split_vma+0xc6/0x110 [ 31.261141] mprotect_fixup+0x8d2/0xb30 [ 31.261694] do_mprotect_pkey+0x87e/0xd40 [ 31.262286] __x64_sys_mprotect+0x78/0xc0 [ 31.262890] do_syscall_64+0x3f/0x90 [ 31.263413] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.264147] [ 31.264385] Freed by task 215: [ 31.264820] kasan_save_stack+0x22/0x50 [ 31.265374] kasan_set_track+0x25/0x30 [ 31.265921] kasan_save_free_info+0x2b/0x50 [ 31.266548] __kasan_slab_free+0x10a/0x190 [ 31.267139] kmem_cache_free+0x10d/0x4d0 [ 31.267719] rcu_core+0x8c8/0x2860 [ 31.268228] __do_softirq+0x1b7/0x7d4 [ 31.268749] [ 31.268980] Last potentially related work creation: [ 31.269608] kasan_save_stack+0x22/0x50 [ 31.270145] __kasan_record_aux_stack+0x8e/0xa0 [ 31.270791] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.271475] remove_vma+0x139/0x170 [ 31.271974] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.272574] do_vmi_munmap+0x1f1/0x2b0 [ 31.273098] __vm_munmap+0x138/0x3a0 [ 31.273598] __x64_sys_munmap+0x59/0x80 [ 31.274132] do_syscall_64+0x3f/0x90 [ 31.274667] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.275357] [ 31.275588] Second to last potentially related work creation: [ 31.276337] kasan_save_stack+0x22/0x50 [ 31.276875] __kasan_record_aux_stack+0x8e/0xa0 [ 31.277488] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.278177] remove_vma+0x139/0x170 [ 31.278688] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.279289] do_vmi_munmap+0x1f1/0x2b0 [ 31.279807] mmap_region+0x1f9/0x2660 [ 31.280331] do_mmap+0x854/0xf00 [ 31.280790] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.281308] ksys_mmap_pgoff+0x3af/0x500 [ 31.281836] do_syscall_64+0x3f/0x90 [ 31.282377] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.283061] [ 31.283289] The buggy address belongs to the object at ffff88800eac1000 [ 31.283289] which belongs to the cache vm_area_struct of size 168 [ 31.284877] The buggy address is located 88 bytes inside of [ 31.284877] freed 168-byte region [ffff88800eac1000, ffff88800eac10a8) [ 31.286407] [ 31.286639] The buggy address belongs to the physical page: [ 31.287333] page:00000000db640615 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeac1 [ 31.288491] memcg:ffff88800d1b1501 [ 31.288944] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.289630] page_type: 0xffffffff() [ 31.290110] raw: 0100000000000200 ffff8880087a0c80 ffffea00003560c0 dead000000000008 [ 31.291123] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d1b1501 [ 31.292105] page dumped because: kasan: bad access detected [ 31.292817] [ 31.293048] Memory state around the buggy address: [ 31.293674] ffff88800eac0f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.294619] ffff88800eac0f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.295533] >ffff88800eac1000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.296485] ^ [ 31.297263] ffff88800eac1080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 31.298181] ffff88800eac1100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.299150] ================================================================== [ 31.300447] Disabling lock debugging due to kernel taint [ 33.340111] BUG: Bad rss-counter state mm:000000005c45201c type:MM_FILEPAGES val:33 [ 33.341327] BUG: Bad rss-counter state mm:000000005c45201c type:MM_ANONPAGES val:22 [ 33.758988] BUG: Bad rss-counter state mm:00000000fecba873 type:MM_FILEPAGES val:33 [ 33.759949] BUG: Bad rss-counter state mm:00000000fecba873 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:64485' (ECDSA) to the list of known hosts. 2023/06/21 00:11:30 fuzzer started 2023/06/21 00:11:30 dialing manager at localhost:36067 2023/06/21 00:11:30 checking machine... 2023/06/21 00:11:30 checking revisions... [ 34.498717] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:11:30 testing simple program... [ 34.566982] cgroup: Unknown subsys name 'net' [ 34.635179] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:11:29 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffffff85652b60 RCX=ffffffff814c84a1 RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000000 RBP=0000000000000000 RSP=ffff8880158b7248 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=00007fe0cb500c64 R13=0000000000000000 R14=ffff88801586b680 R15=0000000000000cc0 RIP=ffffffff814c0408 RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fe0cac47900 00000000 00000000 GS =0000 ffff88806ce00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe0000003000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000001000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007fe0ca08e280 CR3=000000000c640000 CR4=00350ef0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=8198186dc6f8324300000000000ae988 XMM05=ae3d204846bc771a0000000000134090 XMM06=00c3ffa147b8d8570000000000132e80 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=ffff888016807bf0 RSI=ffff888016807bb8 RDI=ffff888016807718 RBP=ffff8880168077a0 RSP=ffff8880168076e8 R8 =0000000000000001 R9 =ffff888016807748 R10=0000000000038001 R11=000000000008b5b9 R12=ffff8880168077d0 R13=ffff888016807750 R14=ffff888016807bb8 R15=ffff888016807708 RIP=ffffffff81130933 RFL=00000292 [--S-A--] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fa44b428900 00000000 00000000 GS =0000 ffff88806cf00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe000004a000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000048000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007ffe294ac000 CR3=000000001a3d6000 CR4=00350ee0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000