[ 23.755479] BUG: Bad rss-counter state mm:00000000d25ef16e type:MM_FILEPAGES val:33 [ 23.756790] BUG: Bad rss-counter state mm:00000000d25ef16e type:MM_ANONPAGES val:22 [ 23.792364] ================================================================== [ 23.793050] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.793769] Read of size 8 at addr ffff88800ede66b0 by task sshd/218 [ 23.794360] [ 23.794528] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.795207] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.795958] Call Trace: [ 23.796191] [ 23.796391] dump_stack_lvl+0x91/0xf0 [ 23.796742] print_report+0xcc/0x620 [ 23.797217] ? __virt_addr_valid+0x102/0x340 [ 23.797603] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.798046] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.798487] kasan_report+0xbe/0xf0 [ 23.798841] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.799290] vma_interval_tree_remove+0xc75/0xec0 [ 23.799721] vma_prepare+0xc54/0x11a0 [ 23.800048] __split_vma+0x5af/0x950 [ 23.800383] ? __pfx___split_vma+0x10/0x10 [ 23.800750] ? find_held_lock+0x2c/0x110 [ 23.801120] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.801511] ? lock_is_held_type+0x9f/0x120 [ 23.801893] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.802318] ? mtree_range_walk+0x632/0x900 [ 23.802703] ? mas_walk+0x5c7/0x7c0 [ 23.803051] do_vmi_munmap+0x1f1/0x2b0 [ 23.803400] mmap_region+0x1f9/0x2660 [ 23.803733] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.804093] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.804588] ? __pfx_lock_acquire+0x10/0x10 [ 23.804953] ? __pfx_mmap_region+0x10/0x10 [ 23.805324] ? security_mmap_addr+0x7d/0xa0 [ 23.805694] ? get_unmapped_area+0x1f5/0x3f0 [ 23.806073] do_mmap+0x854/0xf00 [ 23.806378] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.806717] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.807113] ksys_mmap_pgoff+0x3af/0x500 [ 23.807461] do_syscall_64+0x3f/0x90 [ 23.807794] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.808241] RIP: 0033:0x7f1609118d82 [ 23.808555] 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 [ 23.810115] RSP: 002b:00007ffd21a55f58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.810717] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1609118d82 [ 23.811290] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1608552000 [ 23.811853] RBP: 00007f1608552000 R08: 0000000000000009 R09: 0000000000001000 [ 23.812416] R10: 0000000000000812 R11: 0000000000000206 R12: 00005558a6366ec0 [ 23.812980] R13: 00007ffd21a55f70 R14: 00007ffd21a55fa0 R15: 00007ffd21a56300 [ 23.813550] [ 23.813743] [ 23.813886] Allocated by task 211: [ 23.814172] kasan_save_stack+0x22/0x50 [ 23.814507] kasan_set_track+0x25/0x30 [ 23.814846] __kasan_slab_alloc+0x59/0x70 [ 23.815202] kmem_cache_alloc+0x16b/0x370 [ 23.815546] vm_area_dup+0x20/0x160 [ 23.815848] __split_vma+0x170/0x950 [ 23.816159] split_vma+0xc6/0x110 [ 23.816450] mprotect_fixup+0x8d2/0xb30 [ 23.816786] do_mprotect_pkey+0x87e/0xd40 [ 23.817133] __x64_sys_mprotect+0x78/0xc0 [ 23.817480] do_syscall_64+0x3f/0x90 [ 23.817796] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.818223] [ 23.818368] Freed by task 211: [ 23.818628] kasan_save_stack+0x22/0x50 [ 23.818967] kasan_set_track+0x25/0x30 [ 23.819297] kasan_save_free_info+0x2b/0x50 [ 23.819651] __kasan_slab_free+0x10a/0x190 [ 23.820006] kmem_cache_free+0x10d/0x4d0 [ 23.820343] rcu_core+0x8c8/0x2860 [ 23.820637] __do_softirq+0x1b7/0x7d4 [ 23.820955] [ 23.821105] Last potentially related work creation: [ 23.821494] kasan_save_stack+0x22/0x50 [ 23.821828] __kasan_record_aux_stack+0x8e/0xa0 [ 23.822209] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.822635] remove_vma+0x139/0x170 [ 23.822940] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.823307] do_vmi_munmap+0x1f1/0x2b0 [ 23.823630] __vm_munmap+0x138/0x3a0 [ 23.823938] __x64_sys_munmap+0x59/0x80 [ 23.824267] do_syscall_64+0x3f/0x90 [ 23.824581] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.825007] [ 23.825149] Second to last potentially related work creation: [ 23.825600] kasan_save_stack+0x22/0x50 [ 23.825936] __kasan_record_aux_stack+0x8e/0xa0 [ 23.826314] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.826733] remove_vma+0x139/0x170 [ 23.827045] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.827412] do_vmi_munmap+0x1f1/0x2b0 [ 23.827731] mmap_region+0x1f9/0x2660 [ 23.828045] do_mmap+0x854/0xf00 [ 23.828333] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.828655] ksys_mmap_pgoff+0x3af/0x500 [ 23.828984] do_syscall_64+0x3f/0x90 [ 23.829299] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.829724] [ 23.829867] The buggy address belongs to the object at ffff88800ede6658 [ 23.829867] which belongs to the cache vm_area_struct of size 168 [ 23.830837] The buggy address is located 88 bytes inside of [ 23.830837] freed 168-byte region [ffff88800ede6658, ffff88800ede6700) [ 23.831764] [ 23.831907] The buggy address belongs to the physical page: [ 23.832341] page:00000000eef10d92 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xede6 [ 23.833054] memcg:ffff88800da26d01 [ 23.833335] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 23.833798] page_type: 0xffffffff() [ 23.834095] raw: 0100000000000200 ffff8880087a0c80 ffffea0000597140 dead000000000005 [ 23.834701] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800da26d01 [ 23.835302] page dumped because: kasan: bad access detected [ 23.835740] [ 23.835882] Memory state around the buggy address: [ 23.836264] ffff88800ede6580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 23.836827] ffff88800ede6600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 23.837393] >ffff88800ede6680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.837953] ^ [ 23.838338] ffff88800ede6700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 23.838906] ffff88800ede6780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 23.839465] ================================================================== [ 23.840107] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.625214] BUG: Bad rss-counter state mm:00000000d4ff0416 type:MM_FILEPAGES val:33 [ 26.626588] BUG: Bad rss-counter state mm:00000000d4ff0416 type:MM_ANONPAGES val:22 [ 27.109988] BUG: Bad rss-counter state mm:000000002ca6d606 type:MM_FILEPAGES val:33 [ 27.110996] BUG: Bad rss-counter state mm:000000002ca6d606 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:54024' (ECDSA) to the list of known hosts. 2023/06/21 09:23:09 fuzzer started 2023/06/21 09:23:09 dialing manager at localhost:36067 2023/06/21 09:23:09 checking machine... 2023/06/21 09:23:09 checking revisions... [ 27.873332] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:23:09 testing simple program... [ 27.932470] cgroup: Unknown subsys name 'net' [ 28.005239] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:23:09 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806cf395c0 RCX=0000000000000000 RDX=1ffff110011b2390 RSI=ffff888008d91bc0 RDI=ffff88806cf395c0 RBP=0000000000000009 RSP=ffff88800ec97600 R8 =0000000000094800 R9 =ffff88806cf3965c R10=0000000000000000 R11=0000000000000001 R12=0000000000000000 R13=ffffffff85d3e490 R14=ffff888008d91c80 R15=ffff88806cf39660 RIP=ffffffff81254aaa RFL=00000002 [-------] 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 00007fc8fdb2e700 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=00007ffed068c8d8 CR3=000000000e5ac000 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=2039303a33323a3930203132206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038303a33323a3930203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=000055b3df898f80 RCX=00007f49456b8e8e RDX=0000000000001000 RSI=000055b3df8a74f0 RDI=0000000000000008 RBP=00007f494578a4a0 RSP=00007ffff215fb18 R8 =0000000000000008 R9 =00007f4945788be0 R10=0000000000000100 R11=0000000000000246 R12=00007f49451d6900 R13=00007f49457898a0 R14=0000000000000d68 R15=0000000000000d68 RIP=ffffffff84600007 RFL=00000002 [-------] 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 00007f49451d6900 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=00007ffff215a000 CR3=000000000c72c000 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=2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c XMM01=00ff00000000000000000000000000ff XMM02=00ff00000000000000000000000000ff XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=6500273d2720676e6974636570786500 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000