syzkaller login: [ 31.133830] BUG: Bad rss-counter state mm:0000000026b91ee7 type:MM_FILEPAGES val:33 [ 31.135005] BUG: Bad rss-counter state mm:0000000026b91ee7 type:MM_ANONPAGES val:22 [ 31.306063] ================================================================== [ 31.307081] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.308061] Read of size 8 at addr ffff88801a1cb880 by task sshd/220 [ 31.308987] [ 31.309223] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.310137] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.311177] Call Trace: [ 31.311513] [ 31.311815] dump_stack_lvl+0x91/0xf0 [ 31.312331] print_report+0xcc/0x620 [ 31.312849] ? __virt_addr_valid+0x102/0x340 [ 31.313431] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.314111] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.314809] kasan_report+0xbe/0xf0 [ 31.315353] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.316087] vma_interval_tree_remove+0xc75/0xec0 [ 31.316760] vma_prepare+0xc54/0x11a0 [ 31.317318] __split_vma+0x5af/0x950 [ 31.317867] ? __pfx___split_vma+0x10/0x10 [ 31.318482] ? find_held_lock+0x2c/0x110 [ 31.319096] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.319747] ? lock_is_held_type+0x9f/0x120 [ 31.320368] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.321070] ? mtree_range_walk+0x632/0x900 [ 31.321702] ? mas_walk+0x5c7/0x7c0 [ 31.322241] do_vmi_munmap+0x1f1/0x2b0 [ 31.322818] mmap_region+0x1f9/0x2660 [ 31.323359] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.323949] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.324783] ? __pfx_lock_acquire+0x10/0x10 [ 31.325383] ? __pfx_mmap_region+0x10/0x10 [ 31.326015] ? security_mmap_addr+0x7d/0xa0 [ 31.326631] ? get_unmapped_area+0x1f5/0x3f0 [ 31.327276] do_mmap+0x854/0xf00 [ 31.327774] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.328336] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.328994] ksys_mmap_pgoff+0x3af/0x500 [ 31.329556] do_syscall_64+0x3f/0x90 [ 31.330107] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.330839] RIP: 0033:0x7fd483759d82 [ 31.331364] 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 [ 31.333825] RSP: 002b:00007ffc46074358 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.334882] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd483759d82 [ 31.335845] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd482b93000 [ 31.336845] RBP: 00007fd482b93000 R08: 0000000000000009 R09: 0000000000001000 [ 31.337839] R10: 0000000000000812 R11: 0000000000000206 R12: 00005639c4b37ec0 [ 31.338833] R13: 00007ffc46074370 R14: 00007ffc460743a0 R15: 00007ffc46074700 [ 31.339827] [ 31.340168] [ 31.340419] Allocated by task 213: [ 31.340924] kasan_save_stack+0x22/0x50 [ 31.341515] kasan_set_track+0x25/0x30 [ 31.342087] __kasan_slab_alloc+0x59/0x70 [ 31.342698] kmem_cache_alloc+0x16b/0x370 [ 31.343301] vm_area_dup+0x20/0x160 [ 31.343822] __split_vma+0x170/0x950 [ 31.344347] split_vma+0xc6/0x110 [ 31.344849] mprotect_fixup+0x8d2/0xb30 [ 31.345431] do_mprotect_pkey+0x87e/0xd40 [ 31.346036] __x64_sys_mprotect+0x78/0xc0 [ 31.346639] do_syscall_64+0x3f/0x90 [ 31.347193] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.347928] [ 31.348174] Freed by task 213: [ 31.348630] kasan_save_stack+0x22/0x50 [ 31.349204] kasan_set_track+0x25/0x30 [ 31.349762] kasan_save_free_info+0x2b/0x50 [ 31.350374] __kasan_slab_free+0x10a/0x190 [ 31.350993] kmem_cache_free+0x10d/0x4d0 [ 31.351575] rcu_core+0x8c8/0x2860 [ 31.352100] __do_softirq+0x1b7/0x7d4 [ 31.352636] [ 31.352888] Last potentially related work creation: [ 31.353566] kasan_save_stack+0x22/0x50 [ 31.354147] __kasan_record_aux_stack+0x8e/0xa0 [ 31.354803] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.355558] remove_vma+0x139/0x170 [ 31.356084] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.356727] do_vmi_munmap+0x1f1/0x2b0 [ 31.357269] __vm_munmap+0x138/0x3a0 [ 31.357806] __x64_sys_munmap+0x59/0x80 [ 31.358386] do_syscall_64+0x3f/0x90 [ 31.358927] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.359664] [ 31.359922] The buggy address belongs to the object at ffff88801a1cb828 [ 31.359922] which belongs to the cache vm_area_struct of size 168 [ 31.361612] The buggy address is located 88 bytes inside of [ 31.361612] freed 168-byte region [ffff88801a1cb828, ffff88801a1cb8d0) [ 31.363247] [ 31.363503] The buggy address belongs to the physical page: [ 31.364274] page:000000009d08e7ec refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a1cb [ 31.365557] memcg:ffff88801a217f01 [ 31.366052] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.366774] page_type: 0xffffffff() [ 31.367294] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.368353] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a217f01 [ 31.369389] page dumped because: kasan: bad access detected [ 31.370160] [ 31.370407] Memory state around the buggy address: [ 31.371083] ffff88801a1cb780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 31.372057] ffff88801a1cb800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.373045] >ffff88801a1cb880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.374034] ^ [ 31.374516] ffff88801a1cb900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.375528] ffff88801a1cb980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 31.376521] ================================================================== [ 31.377887] Disabling lock debugging due to kernel taint [ 33.230800] BUG: Bad rss-counter state mm:00000000689c7a88 type:MM_FILEPAGES val:33 [ 33.231993] BUG: Bad rss-counter state mm:00000000689c7a88 type:MM_ANONPAGES val:22 [ 33.716804] BUG: Bad rss-counter state mm:0000000060e4ec93 type:MM_FILEPAGES val:33 [ 33.718178] BUG: Bad rss-counter state mm:0000000060e4ec93 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:34440' (ECDSA) to the list of known hosts. 2023/06/20 03:20:27 fuzzer started 2023/06/20 03:20:27 dialing manager at localhost:44161 2023/06/20 03:20:27 checking machine... 2023/06/20 03:20:27 checking revisions... [ 34.448244] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:20:27 testing simple program... [ 34.502185] cgroup: Unknown subsys name 'net' [ 34.556893] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:20:26 Registers: info registers vcpu 0 RAX=0000000000000003 RBX=ffffffff85d3d010 RCX=ffffffff812d869a RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=1ffff110011aff7f RSP=ffff888008d7fbe8 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000128 R12=ffff88801cdfcac8 R13=ffffffff81846723 R14=ffffffff8186b9c5 R15=ffff888008deb300 RIP=ffffffff812d86e0 RFL=00000046 [---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 0000000000000000 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=00007f3c2efb1200 CR3=0000000013afc000 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=00000000000000000000000000000000 XMM01=6c5be114f2777dbaf14ece77f19f4d86 XMM02=000000000011dcc8ec2efd57dc4c00df XMM03=00000000001252500173c269dbd82cb3 XMM04=21776faf3b1da9d500000000000ae988 XMM05=19e9129bd510f2350000000000134dd0 XMM06=296649b9ce8a6b530000000000133c38 XMM07=e042d86d42eb936e00000000001254d0 XMM08=0173c269dbd82cb3000000000011dd28 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88801ce77f58 RCX=0000000000000000 RDX=ffff88801ce77ed0 RSI=0000000000000001 RDI=00007ffdda827468 RBP=1ffff110039cefd6 RSP=ffff88801ce77ea0 R8 =0000000000000006 R9 =0000000000000000 R10=0000000000000022 R11=0000000000000000 R12=ffff88801ce77ed0 R13=0000000000000001 R14=00007ffdda827468 R15=0000000000000000 RIP=ffffffff818c1c22 RFL=00000293 [--S-A-C] 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 00007fce58d98900 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=00007ffdda828000 CR3=000000001ce22000 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