syzkaller login: [ 30.782730] BUG: Bad rss-counter state mm:00000000e49fc5e3 type:MM_FILEPAGES val:33 [ 30.784246] BUG: Bad rss-counter state mm:00000000e49fc5e3 type:MM_ANONPAGES val:22 [ 30.938743] ================================================================== [ 30.939442] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.940156] Read of size 8 at addr ffff88800cc39880 by task sshd/221 [ 30.940745] [ 30.940912] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.941574] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.942321] Call Trace: [ 30.942565] [ 30.942787] dump_stack_lvl+0x91/0xf0 [ 30.943166] print_report+0xcc/0x620 [ 30.943743] ? __virt_addr_valid+0x102/0x340 [ 30.944167] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.944659] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.945133] kasan_report+0xbe/0xf0 [ 30.945499] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.945985] vma_interval_tree_remove+0xc75/0xec0 [ 30.946459] vma_prepare+0xc54/0x11a0 [ 30.946828] __split_vma+0x5af/0x950 [ 30.947186] ? __pfx___split_vma+0x10/0x10 [ 30.947590] ? find_held_lock+0x2c/0x110 [ 30.947987] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.948437] ? lock_is_held_type+0x9f/0x120 [ 30.948853] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.949317] ? mtree_range_walk+0x632/0x900 [ 30.949735] ? mas_walk+0x5c7/0x7c0 [ 30.950092] do_vmi_munmap+0x1f1/0x2b0 [ 30.950468] mmap_region+0x1f9/0x2660 [ 30.950838] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.951230] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.951784] ? __pfx_lock_acquire+0x10/0x10 [ 30.952191] ? __pfx_mmap_region+0x10/0x10 [ 30.952604] ? security_mmap_addr+0x7d/0xa0 [ 30.953013] ? get_unmapped_area+0x1f5/0x3f0 [ 30.953441] do_mmap+0x854/0xf00 [ 30.953772] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.954155] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.954595] ksys_mmap_pgoff+0x3af/0x500 [ 30.954985] do_syscall_64+0x3f/0x90 [ 30.955356] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.955855] RIP: 0033:0x7ff94c49cd82 [ 30.956211] 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 [ 30.957858] RSP: 002b:00007fff97ad3828 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.958550] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff94c49cd82 [ 30.959205] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff94b8d6000 [ 30.959860] RBP: 00007ff94b8d6000 R08: 0000000000000009 R09: 0000000000001000 [ 30.960527] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559d7b271b20 [ 30.961178] R13: 00007fff97ad3840 R14: 00007fff97ad3870 R15: 00007fff97ad3bd0 [ 30.961841] [ 30.962060] [ 30.962223] Allocated by task 214: [ 30.962554] kasan_save_stack+0x22/0x50 [ 30.962938] kasan_set_track+0x25/0x30 [ 30.963314] __kasan_slab_alloc+0x59/0x70 [ 30.963713] kmem_cache_alloc+0x16b/0x370 [ 30.964107] vm_area_dup+0x20/0x160 [ 30.964461] __split_vma+0x170/0x950 [ 30.964831] split_vma+0xc6/0x110 [ 30.965169] mprotect_fixup+0x8d2/0xb30 [ 30.965556] do_mprotect_pkey+0x87e/0xd40 [ 30.965952] __x64_sys_mprotect+0x78/0xc0 [ 30.966354] do_syscall_64+0x3f/0x90 [ 30.966716] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.967205] [ 30.967375] Freed by task 214: [ 30.967678] kasan_save_stack+0x22/0x50 [ 30.968066] kasan_set_track+0x25/0x30 [ 30.968451] kasan_save_free_info+0x2b/0x50 [ 30.968858] __kasan_slab_free+0x10a/0x190 [ 30.969268] kmem_cache_free+0x10d/0x4d0 [ 30.969658] rcu_core+0x8c8/0x2860 [ 30.969998] __do_softirq+0x1b7/0x7d4 [ 30.970362] [ 30.970529] Last potentially related work creation: [ 30.970981] kasan_save_stack+0x22/0x50 [ 30.971363] __kasan_record_aux_stack+0x8e/0xa0 [ 30.971801] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.972291] remove_vma+0x139/0x170 [ 30.972657] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.973090] do_vmi_munmap+0x1f1/0x2b0 [ 30.973462] __vm_munmap+0x138/0x3a0 [ 30.973827] __x64_sys_munmap+0x59/0x80 [ 30.974210] do_syscall_64+0x3f/0x90 [ 30.974573] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.975068] [ 30.975230] Second to last potentially related work creation: [ 30.975757] kasan_save_stack+0x22/0x50 [ 30.976142] __kasan_record_aux_stack+0x8e/0xa0 [ 30.976592] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.977094] remove_vma+0x139/0x170 [ 30.977440] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.977865] do_vmi_munmap+0x1f1/0x2b0 [ 30.978232] mmap_region+0x1f9/0x2660 [ 30.978601] do_mmap+0x854/0xf00 [ 30.978930] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.979308] ksys_mmap_pgoff+0x3af/0x500 [ 30.979695] do_syscall_64+0x3f/0x90 [ 30.980053] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.980551] [ 30.980720] The buggy address belongs to the object at ffff88800cc39828 [ 30.980720] which belongs to the cache vm_area_struct of size 168 [ 30.981841] The buggy address is located 88 bytes inside of [ 30.981841] freed 168-byte region [ffff88800cc39828, ffff88800cc398d0) [ 30.982919] [ 30.983087] The buggy address belongs to the physical page: [ 30.983590] page:000000009c5a6bf9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcc39 [ 30.984434] memcg:ffff88800f5d9801 [ 30.984858] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.985351] page_type: 0xffffffff() [ 30.985697] raw: 0100000000000200 ffff88800879fc80 ffffea00003a4940 dead000000000004 [ 30.986406] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f5d9801 [ 30.987104] page dumped because: kasan: bad access detected [ 30.987610] [ 30.987774] Memory state around the buggy address: [ 30.988217] ffff88800cc39780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.988881] ffff88800cc39800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.989540] >ffff88800cc39880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.990195] ^ [ 30.990514] ffff88800cc39900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.991174] ffff88800cc39980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 30.991826] ================================================================== [ 30.992575] Disabling lock debugging due to kernel taint [ 32.855450] BUG: Bad rss-counter state mm:000000001db6b1df type:MM_FILEPAGES val:33 [ 32.856234] BUG: Bad rss-counter state mm:000000001db6b1df type:MM_ANONPAGES val:22 [ 33.372701] BUG: Bad rss-counter state mm:00000000183433bb type:MM_FILEPAGES val:33 [ 33.373858] BUG: Bad rss-counter state mm:00000000183433bb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:42543' (ECDSA) to the list of known hosts. 2023/06/20 01:32:10 fuzzer started 2023/06/20 01:32:10 dialing manager at localhost:44161 2023/06/20 01:32:10 checking machine... 2023/06/20 01:32:10 checking revisions... [ 34.013534] kmemleak: Automatic memory scanning thread ended 2023/06/20 01:32:10 testing simple program... [ 34.063749] cgroup: Unknown subsys name 'net' [ 34.102908] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:32:10 Registers: info registers vcpu 0 RAX=0000000000000003 RBX=0000000000000180 RCX=1ffffffff0ba7a02 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff8183a2cc RBP=ffff88806ce361a0 RSP=ffff8880147d7c68 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000000 R13=ffff88800c725300 R14=0000000000000cc0 R15=0000000000000001 RIP=ffffffff8183a2d0 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 00007fe6dc43a900 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=00007ffc9527f000 CR3=000000000e9d8000 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=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 info registers vcpu 1 RAX=0000000000000000 RBX=1ffff1100121bdd6 RCX=0000000000000000 RDX=ffff88800903b680 RSI=ffffffff81af665c RDI=0000000000000003 RBP=0000000000001000 RSP=ffff8880090deea0 R8 =0000000000000003 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000128 R12=ffff8880191defa8 R13=0000000000000000 R14=0000000000000000 R15=0000000000008800 RIP=ffffffff814c081b 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=00007fc1215dd000 CR3=000000000c4f8000 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=71a54853673e15ae7e4f862188026b92 XMM02=000000000011de00ec2efd57dc4c00df XMM03=00000000001248d87c8c10911f2a2f8d XMM04=e78fbb52bfe54bc000000000000ae988 XMM05=e4cb8bb95a7664b60000000000135b08 XMM06=0b6bcee08485b56e0000000000134950 XMM07=e042d86d42eb936e0000000000124b58 XMM08=7c8c10911f2a2f8d000000000011de60 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000