syzkaller login: [ 31.100852] BUG: Bad rss-counter state mm:00000000389185fb type:MM_FILEPAGES val:33 [ 31.101894] BUG: Bad rss-counter state mm:00000000389185fb type:MM_ANONPAGES val:22 [ 31.268285] ================================================================== [ 31.269202] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.270135] Read of size 8 at addr ffff888016a9e6b0 by task sshd/220 [ 31.270899] [ 31.271119] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.272077] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.273040] Call Trace: [ 31.273360] [ 31.273640] dump_stack_lvl+0x91/0xf0 [ 31.274146] print_report+0xcc/0x620 [ 31.274629] ? __virt_addr_valid+0x102/0x340 [ 31.275183] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.275790] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.276395] kasan_report+0xbe/0xf0 [ 31.276877] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.277495] vma_interval_tree_remove+0xc75/0xec0 [ 31.278096] vma_prepare+0xc54/0x11a0 [ 31.278575] __split_vma+0x5af/0x950 [ 31.279052] ? __pfx___split_vma+0x10/0x10 [ 31.279576] ? find_held_lock+0x2c/0x110 [ 31.280093] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.280656] ? lock_is_held_type+0x9f/0x120 [ 31.281199] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.281823] ? mtree_range_walk+0x632/0x900 [ 31.282372] ? mas_walk+0x5c7/0x7c0 [ 31.282845] do_vmi_munmap+0x1f1/0x2b0 [ 31.283341] mmap_region+0x1f9/0x2660 [ 31.283817] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.284328] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.285036] ? __pfx_lock_acquire+0x10/0x10 [ 31.285566] ? __pfx_mmap_region+0x10/0x10 [ 31.286106] ? security_mmap_addr+0x7d/0xa0 [ 31.286634] ? get_unmapped_area+0x1f5/0x3f0 [ 31.287182] do_mmap+0x854/0xf00 [ 31.287619] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.288116] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.288683] ksys_mmap_pgoff+0x3af/0x500 [ 31.289185] do_syscall_64+0x3f/0x90 [ 31.289662] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.290326] RIP: 0033:0x7fb33c570d82 [ 31.290785] 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 [ 31.292900] RSP: 002b:00007ffe362d9b78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.293811] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb33c570d82 [ 31.294659] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb33b9aa000 [ 31.295490] RBP: 00007fb33b9aa000 R08: 0000000000000009 R09: 0000000000001000 [ 31.296320] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e371b6af70 [ 31.297157] R13: 00007ffe362d9b90 R14: 00007ffe362d9bc0 R15: 00007ffe362d9f20 [ 31.298017] [ 31.298305] [ 31.298517] Allocated by task 213: [ 31.298948] kasan_save_stack+0x22/0x50 [ 31.299446] kasan_set_track+0x25/0x30 [ 31.299936] __kasan_slab_alloc+0x59/0x70 [ 31.300455] kmem_cache_alloc+0x16b/0x370 [ 31.300965] vm_area_dup+0x20/0x160 [ 31.301413] __split_vma+0x170/0x950 [ 31.301908] split_vma+0xc6/0x110 [ 31.302345] mprotect_fixup+0x8d2/0xb30 [ 31.302841] do_mprotect_pkey+0x87e/0xd40 [ 31.303353] __x64_sys_mprotect+0x78/0xc0 [ 31.303874] do_syscall_64+0x3f/0x90 [ 31.304346] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.304990] [ 31.305205] Freed by task 13: [ 31.305582] kasan_save_stack+0x22/0x50 [ 31.306091] kasan_set_track+0x25/0x30 [ 31.306577] kasan_save_free_info+0x2b/0x50 [ 31.307107] __kasan_slab_free+0x10a/0x190 [ 31.307636] kmem_cache_free+0x10d/0x4d0 [ 31.308140] rcu_core+0x8c8/0x2860 [ 31.308579] __do_softirq+0x1b7/0x7d4 [ 31.309050] [ 31.309266] Last potentially related work creation: [ 31.309859] kasan_save_stack+0x22/0x50 [ 31.310360] __kasan_record_aux_stack+0x8e/0xa0 [ 31.310932] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.311564] remove_vma+0x139/0x170 [ 31.312013] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.312567] do_vmi_munmap+0x1f1/0x2b0 [ 31.313047] __vm_munmap+0x138/0x3a0 [ 31.313506] __x64_sys_munmap+0x59/0x80 [ 31.314018] do_syscall_64+0x3f/0x90 [ 31.314489] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.315121] [ 31.315333] The buggy address belongs to the object at ffff888016a9e658 [ 31.315333] which belongs to the cache vm_area_struct of size 168 [ 31.316784] The buggy address is located 88 bytes inside of [ 31.316784] freed 168-byte region [ffff888016a9e658, ffff888016a9e700) [ 31.318189] [ 31.318402] The buggy address belongs to the physical page: [ 31.319054] page:000000004ab542bc refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16a9e [ 31.320132] memcg:ffff888016a9f001 [ 31.320557] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.321192] page_type: 0xffffffff() [ 31.321638] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.322550] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016a9f001 [ 31.323449] page dumped because: kasan: bad access detected [ 31.324106] [ 31.324320] Memory state around the buggy address: [ 31.324894] ffff888016a9e580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.325764] ffff888016a9e600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.326605] >ffff888016a9e680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.327455] ^ [ 31.328033] ffff888016a9e700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.328869] ffff888016a9e780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.329700] ================================================================== [ 31.330848] Disabling lock debugging due to kernel taint [ 33.281356] BUG: Bad rss-counter state mm:000000002d71caac type:MM_FILEPAGES val:33 [ 33.282597] BUG: Bad rss-counter state mm:000000002d71caac type:MM_ANONPAGES val:22 [ 33.681016] BUG: Bad rss-counter state mm:000000000262d5b0 type:MM_FILEPAGES val:33 [ 33.682024] BUG: Bad rss-counter state mm:000000000262d5b0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:60115' (ECDSA) to the list of known hosts. 2023/06/20 10:42:38 fuzzer started 2023/06/20 10:42:38 dialing manager at localhost:44161 2023/06/20 10:42:38 checking machine... 2023/06/20 10:42:38 checking revisions... [ 34.409863] kmemleak: Automatic memory scanning thread ended 2023/06/20 10:42:38 testing simple program... [ 34.463380] cgroup: Unknown subsys name 'net' [ 34.502374] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:42:37 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000138 RCX=1ffffffff0ba7a02 RDX=0000000000000000 RSI=0000000000000008 RDI=ffff88800db1ef80 RBP=ffff88800db1ef80 RSP=ffff88800d677638 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffff8880087b6500 R13=ffff88800db1ef80 R14=0000000000000cc0 R15=0000000000000cc0 RIP=ffffffff8135bcfe 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 00007f2c1f4af900 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=00007eff078e7650 CR3=000000000d63e000 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=454144c7bcbfd3d500000000000ae988 XMM05=4da8db232102ef130000000000134870 XMM06=4fda316b135da52b0000000000133660 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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 0000000000000000 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=00007ffcbab5ec58 CR3=000000000f85a000 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=2037333a32343a3031203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037333a32343a3031203032 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000