syzkaller login: [ 35.697830] BUG: Bad rss-counter state mm:00000000d4ca3951 type:MM_FILEPAGES val:33 [ 35.698749] BUG: Bad rss-counter state mm:00000000d4ca3951 type:MM_ANONPAGES val:22 [ 35.844396] ================================================================== [ 35.845468] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.846583] Read of size 8 at addr ffff88800f667058 by task sshd/221 [ 35.847626] [ 35.847945] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.848958] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.850103] Call Trace: [ 35.850522] [ 35.850861] dump_stack_lvl+0x91/0xf0 [ 35.851357] print_report+0xcc/0x620 [ 35.851772] ? __virt_addr_valid+0x102/0x340 [ 35.852244] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.852773] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.853302] kasan_report+0xbe/0xf0 [ 35.853713] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.854242] vma_interval_tree_remove+0xc75/0xec0 [ 35.854769] vma_prepare+0xc54/0x11a0 [ 35.855189] __split_vma+0x5af/0x950 [ 35.855598] ? __pfx___split_vma+0x10/0x10 [ 35.856053] ? find_held_lock+0x2c/0x110 [ 35.856508] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.856991] ? lock_is_held_type+0x9f/0x120 [ 35.857457] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.857981] ? mtree_range_walk+0x632/0x900 [ 35.858460] ? mas_walk+0x5c7/0x7c0 [ 35.858865] do_vmi_munmap+0x1f1/0x2b0 [ 35.859294] mmap_region+0x1f9/0x2660 [ 35.859706] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.860152] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.860766] ? __pfx_lock_acquire+0x10/0x10 [ 35.861232] ? __pfx_mmap_region+0x10/0x10 [ 35.861683] ? security_mmap_addr+0x7d/0xa0 [ 35.862152] ? get_unmapped_area+0x1f5/0x3f0 [ 35.862651] do_mmap+0x854/0xf00 [ 35.863039] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.863470] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.863954] ksys_mmap_pgoff+0x3af/0x500 [ 35.864406] do_syscall_64+0x3f/0x90 [ 35.864826] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.865397] RIP: 0033:0x7f49110fdd82 [ 35.865802] 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 [ 35.867738] RSP: 002b:00007ffead7f3208 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.868507] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f49110fdd82 [ 35.869217] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4910537000 [ 35.869937] RBP: 00007f4910537000 R08: 0000000000000009 R09: 0000000000001000 [ 35.870668] R10: 0000000000000812 R11: 0000000000000206 R12: 000055980f0f8d90 [ 35.871377] R13: 00007ffead7f3220 R14: 00007ffead7f3250 R15: 00007ffead7f35b0 [ 35.872105] [ 35.872353] [ 35.872535] Allocated by task 214: [ 35.872897] kasan_save_stack+0x22/0x50 [ 35.873329] kasan_set_track+0x25/0x30 [ 35.873749] __kasan_slab_alloc+0x59/0x70 [ 35.874191] kmem_cache_alloc+0x16b/0x370 [ 35.874629] vm_area_dup+0x20/0x160 [ 35.875011] __split_vma+0x170/0x950 [ 35.875409] split_vma+0xc6/0x110 [ 35.875783] mprotect_fixup+0x8d2/0xb30 [ 35.876203] do_mprotect_pkey+0x87e/0xd40 [ 35.876636] __x64_sys_mprotect+0x78/0xc0 [ 35.877081] do_syscall_64+0x3f/0x90 [ 35.877488] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.878029] [ 35.878206] Freed by task 214: [ 35.878545] kasan_save_stack+0x22/0x50 [ 35.878969] kasan_set_track+0x25/0x30 [ 35.879383] kasan_save_free_info+0x2b/0x50 [ 35.879823] __kasan_slab_free+0x10a/0x190 [ 35.880274] kmem_cache_free+0x10d/0x4d0 [ 35.880693] rcu_core+0x8c8/0x2860 [ 35.881068] __do_softirq+0x1b7/0x7d4 [ 35.881465] [ 35.881641] Last potentially related work creation: [ 35.882128] kasan_save_stack+0x22/0x50 [ 35.882555] __kasan_record_aux_stack+0x8e/0xa0 [ 35.883030] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.883569] remove_vma+0x139/0x170 [ 35.883942] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.884411] do_vmi_munmap+0x1f1/0x2b0 [ 35.884819] __vm_munmap+0x138/0x3a0 [ 35.885215] __x64_sys_munmap+0x59/0x80 [ 35.885622] do_syscall_64+0x3f/0x90 [ 35.886018] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.886563] [ 35.886743] The buggy address belongs to the object at ffff88800f667000 [ 35.886743] which belongs to the cache vm_area_struct of size 168 [ 35.887965] The buggy address is located 88 bytes inside of [ 35.887965] freed 168-byte region [ffff88800f667000, ffff88800f6670a8) [ 35.889213] [ 35.889390] The buggy address belongs to the physical page: [ 35.889945] page:00000000b1639cfa refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf667 [ 35.890857] memcg:ffff88800dbcd601 [ 35.891214] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.891749] page_type: 0xffffffff() [ 35.892129] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 35.892901] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dbcd601 [ 35.893657] page dumped because: kasan: bad access detected [ 35.894203] [ 35.894378] Memory state around the buggy address: [ 35.894888] ffff88800f666f00: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.895588] ffff88800f666f80: 00 00 fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 35.896305] >ffff88800f667000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.897011] ^ [ 35.897613] ffff88800f667080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 35.898347] ffff88800f667100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.899063] ================================================================== [ 35.899893] Disabling lock debugging due to kernel taint [ 38.336840] BUG: Bad rss-counter state mm:00000000922eb5b6 type:MM_FILEPAGES val:33 [ 38.337836] BUG: Bad rss-counter state mm:00000000922eb5b6 type:MM_ANONPAGES val:22 [ 38.812230] BUG: Bad rss-counter state mm:000000001b031776 type:MM_FILEPAGES val:33 [ 38.814363] BUG: Bad rss-counter state mm:000000001b031776 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:57304' (ECDSA) to the list of known hosts. 2023/06/19 12:04:25 fuzzer started 2023/06/19 12:04:25 dialing manager at localhost:44161 2023/06/19 12:04:25 checking machine... 2023/06/19 12:04:25 checking revisions... [ 39.546254] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:04:25 testing simple program... [ 39.585133] cgroup: Unknown subsys name 'net' [ 39.631849] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:04:20 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff844aac1f RDX=ffff888015918000 RSI=0000000000000001 RDI=0000000000000005 RBP=ffffffff84e38540 RSP=ffff8880175f70e0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000003 R11=000055eaff562000 R12=0000000000000003 R13=0000000000000005 R14=0000000000000003 R15=ffff8880175f75c8 RIP=ffffffff814c0420 RFL=00000202 [-------] 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 00007f69396bf900 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=00007f693969e020 CR3=0000000008eea000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff8880192bd1f0 RBX=ffffea00006c2040 RCX=0000000000000000 RDX=1ffff11003257a83 RSI=ffffffff816512b5 RDI=ffff8880192bd1f0 RBP=ffff8880192bd418 RSP=ffff888008d5f080 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=0000000000009293 R12=1ffff110011abe17 R13=0000000000000bf1 R14=0000000000000000 R15=0000000000000001 RIP=ffffffff816b64d0 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 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=00007fe957e7be28 CR3=0000000005482000 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=ffffffff000000000000000000000000 XMM02=ffffffff000000000000000000000000 XMM03=00000000000000000000000000777074 XMM04=00007f1456b8cc71000000725f646975 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000726f7475636578652d7a7973 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000