syzkaller login: [ 31.164993] BUG: Bad rss-counter state mm:000000008c0266e6 type:MM_FILEPAGES val:33 [ 31.165739] BUG: Bad rss-counter state mm:000000008c0266e6 type:MM_ANONPAGES val:22 [ 31.301104] ================================================================== [ 31.301796] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.302511] Read of size 8 at addr ffff888018e59a50 by task sshd/219 [ 31.303105] [ 31.303282] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.303936] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.304781] Call Trace: [ 31.305031] [ 31.305250] dump_stack_lvl+0x91/0xf0 [ 31.305625] print_report+0xcc/0x620 [ 31.305997] ? __virt_addr_valid+0x102/0x340 [ 31.306424] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.306912] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.307395] kasan_report+0xbe/0xf0 [ 31.307754] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.308231] vma_interval_tree_remove+0xc75/0xec0 [ 31.308694] vma_prepare+0xc54/0x11a0 [ 31.309060] __split_vma+0x5af/0x950 [ 31.309424] ? __pfx___split_vma+0x10/0x10 [ 31.309828] ? find_held_lock+0x2c/0x110 [ 31.310228] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.310660] ? lock_is_held_type+0x9f/0x120 [ 31.311076] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.311558] ? mtree_range_walk+0x632/0x900 [ 31.311985] ? mas_walk+0x5c7/0x7c0 [ 31.312347] do_vmi_munmap+0x1f1/0x2b0 [ 31.312726] mmap_region+0x1f9/0x2660 [ 31.313095] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.313494] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.314038] ? __pfx_lock_acquire+0x10/0x10 [ 31.314450] ? __pfx_mmap_region+0x10/0x10 [ 31.314859] ? security_mmap_addr+0x7d/0xa0 [ 31.315285] ? get_unmapped_area+0x1f5/0x3f0 [ 31.315708] do_mmap+0x854/0xf00 [ 31.316049] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.316434] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.316866] ksys_mmap_pgoff+0x3af/0x500 [ 31.317264] do_syscall_64+0x3f/0x90 [ 31.317631] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.318139] RIP: 0033:0x7f463f1ccd82 [ 31.318493] 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 [ 31.320151] RSP: 002b:00007fff179637d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.320870] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f463f1ccd82 [ 31.321564] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f463e606000 [ 31.322235] RBP: 00007f463e606000 R08: 0000000000000009 R09: 0000000000001000 [ 31.322894] R10: 0000000000000812 R11: 0000000000000206 R12: 00005561f323dec0 [ 31.323595] R13: 00007fff179637f0 R14: 00007fff17963820 R15: 00007fff17963b80 [ 31.324285] [ 31.324518] [ 31.324685] Allocated by task 212: [ 31.325015] kasan_save_stack+0x22/0x50 [ 31.325407] kasan_set_track+0x25/0x30 [ 31.325787] __kasan_slab_alloc+0x59/0x70 [ 31.326198] kmem_cache_alloc+0x16b/0x370 [ 31.326593] vm_area_dup+0x20/0x160 [ 31.326951] __split_vma+0x170/0x950 [ 31.327329] split_vma+0xc6/0x110 [ 31.327669] mprotect_fixup+0x8d2/0xb30 [ 31.328084] do_mprotect_pkey+0x87e/0xd40 [ 31.328501] __x64_sys_mprotect+0x78/0xc0 [ 31.328897] do_syscall_64+0x3f/0x90 [ 31.329265] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.329765] [ 31.329931] Freed by task 212: [ 31.330231] kasan_save_stack+0x22/0x50 [ 31.330613] kasan_set_track+0x25/0x30 [ 31.330989] kasan_save_free_info+0x2b/0x50 [ 31.331421] __kasan_slab_free+0x10a/0x190 [ 31.331830] kmem_cache_free+0x10d/0x4d0 [ 31.332229] rcu_core+0x8c8/0x2860 [ 31.332580] __do_softirq+0x1b7/0x7d4 [ 31.332960] [ 31.333124] Last potentially related work creation: [ 31.333572] kasan_save_stack+0x22/0x50 [ 31.333971] __kasan_record_aux_stack+0x8e/0xa0 [ 31.334424] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.334920] remove_vma+0x139/0x170 [ 31.335286] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.335753] do_vmi_munmap+0x1f1/0x2b0 [ 31.336147] __vm_munmap+0x138/0x3a0 [ 31.336512] __x64_sys_munmap+0x59/0x80 [ 31.336895] do_syscall_64+0x3f/0x90 [ 31.337284] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.337786] [ 31.337950] Second to last potentially related work creation: [ 31.338491] kasan_save_stack+0x22/0x50 [ 31.338888] __kasan_record_aux_stack+0x8e/0xa0 [ 31.339344] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.339834] remove_vma+0x139/0x170 [ 31.340191] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.340634] do_vmi_munmap+0x1f1/0x2b0 [ 31.341020] mmap_region+0x1f9/0x2660 [ 31.341386] do_mmap+0x854/0xf00 [ 31.341714] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.342093] ksys_mmap_pgoff+0x7d/0x500 [ 31.342474] do_syscall_64+0x3f/0x90 [ 31.342852] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.343359] [ 31.343528] The buggy address belongs to the object at ffff888018e599f8 [ 31.343528] which belongs to the cache vm_area_struct of size 168 [ 31.344696] The buggy address is located 88 bytes inside of [ 31.344696] freed 168-byte region [ffff888018e599f8, ffff888018e59aa0) [ 31.345793] [ 31.345959] The buggy address belongs to the physical page: [ 31.346481] page:0000000031fb5adb refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18e59 [ 31.347355] memcg:ffff88800ee5ec01 [ 31.347690] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.348230] page_type: 0xffffffff() [ 31.348595] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 31.349311] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ee5ec01 [ 31.350035] page dumped because: kasan: bad access detected [ 31.350549] [ 31.350721] Memory state around the buggy address: [ 31.351179] ffff888018e59900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.351869] ffff888018e59980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 31.352525] >ffff888018e59a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.353200] ^ [ 31.353738] ffff888018e59a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 31.354393] ffff888018e59b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.355074] ================================================================== [ 31.355961] Disabling lock debugging due to kernel taint [ 32.829720] BUG: Bad rss-counter state mm:00000000aaf82d24 type:MM_FILEPAGES val:33 [ 32.830339] BUG: Bad rss-counter state mm:00000000aaf82d24 type:MM_ANONPAGES val:22 [ 33.203904] BUG: Bad rss-counter state mm:00000000c6645314 type:MM_FILEPAGES val:33 [ 33.204997] BUG: Bad rss-counter state mm:00000000c6645314 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:42007' (ECDSA) to the list of known hosts. 2023/06/20 08:12:35 fuzzer started 2023/06/20 08:12:35 dialing manager at localhost:44161 2023/06/20 08:12:35 checking machine... 2023/06/20 08:12:35 checking revisions... [ 33.855188] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:12:35 testing simple program... [ 33.897985] cgroup: Unknown subsys name 'net' [ 33.938097] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:12:34 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff818a8524 RCX=0000000000000001 RDX=1ffff11001b50e81 RSI=ffff88800da87ae0 RDI=ffffffff818a8524 RBP=ffffffff818a8524 RSP=ffff88800da87358 R8 =0000000000000001 R9 =ffff88800da873f0 R10=0000000000038001 R11=00000000000237d4 R12=ffff88800da87478 R13=0000000000000000 R14=ffff888010323680 R15=ffff8880145cf720 RIP=ffffffff811fc6f7 RFL=00000282 [--S----] 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 00007f1ce812f900 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=00007f1ce75c2918 CR3=000000000c72a000 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=14a1b407c796a13500000000000ae988 XMM05=861b449d4e206db60000000000137cd0 XMM06=806171799158d9670000000000136d70 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff8387435a RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff11002c32ee7 RSI=ffffffff8387435a RDI=ffff8880161977a8 RBP=ffff888016197778 RSP=ffff8880161976d8 R8 =0000000000000001 R9 =ffff888016197720 R10=0000000000038001 R11=000000000008b93b R12=ffff8880161977a8 R13=0000000000000000 R14=ffff888017461b40 R15=0000000000000000 RIP=ffffffff84532440 RFL=00000286 [--S--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 00007fb00cad7900 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=00007ffd2fd65000 CR3=000000001a3a4000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000