[ 34.118868] BUG: Bad rss-counter state mm:00000000c611ddc1 type:MM_FILEPAGES val:33 [ 34.119885] BUG: Bad rss-counter state mm:00000000c611ddc1 type:MM_ANONPAGES val:22 [ 34.280026] ================================================================== [ 34.280948] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.281909] Read of size 8 at addr ffff88800defaed8 by task sshd/219 [ 34.282691] [ 34.283035] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.283926] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.284908] Call Trace: [ 34.285249] [ 34.285538] dump_stack_lvl+0x91/0xf0 [ 34.286041] print_report+0xcc/0x620 [ 34.286529] ? __virt_addr_valid+0x102/0x340 [ 34.287089] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.287723] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.288342] kasan_report+0xbe/0xf0 [ 34.288823] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.289442] vma_interval_tree_remove+0xc75/0xec0 [ 34.290069] vma_prepare+0xc54/0x11a0 [ 34.290546] __split_vma+0x5af/0x950 [ 34.291013] ? __pfx___split_vma+0x10/0x10 [ 34.291536] ? find_held_lock+0x2c/0x110 [ 34.292053] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.292613] ? lock_is_held_type+0x9f/0x120 [ 34.293149] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.293760] ? mtree_range_walk+0x632/0x900 [ 34.294311] ? mas_walk+0x5c7/0x7c0 [ 34.294787] do_vmi_munmap+0x1f1/0x2b0 [ 34.295274] mmap_region+0x1f9/0x2660 [ 34.295752] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.296258] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.296966] ? __pfx_lock_acquire+0x10/0x10 [ 34.297507] ? __pfx_mmap_region+0x10/0x10 [ 34.298044] ? security_mmap_addr+0x7d/0xa0 [ 34.298573] ? get_unmapped_area+0x1f5/0x3f0 [ 34.299119] do_mmap+0x854/0xf00 [ 34.299555] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.300052] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.300620] ksys_mmap_pgoff+0x3af/0x500 [ 34.301130] do_syscall_64+0x3f/0x90 [ 34.301618] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.302268] RIP: 0033:0x7f5162a9cd82 [ 34.302726] 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 [ 34.304855] RSP: 002b:00007fff683e7588 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.305770] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5162a9cd82 [ 34.306617] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5161ed6000 [ 34.307459] RBP: 00007f5161ed6000 R08: 0000000000000009 R09: 0000000000001000 [ 34.308302] R10: 0000000000000812 R11: 0000000000000206 R12: 00005590fa7f1f70 [ 34.309142] R13: 00007fff683e75a0 R14: 00007fff683e75d0 R15: 00007fff683e7930 [ 34.310003] [ 34.310294] [ 34.310507] Allocated by task 211: [ 34.310934] kasan_save_stack+0x22/0x50 [ 34.311433] kasan_set_track+0x25/0x30 [ 34.311921] __kasan_slab_alloc+0x59/0x70 [ 34.312451] kmem_cache_alloc+0x16b/0x370 [ 34.312963] vm_area_dup+0x20/0x160 [ 34.313410] __split_vma+0x170/0x950 [ 34.313889] split_vma+0xc6/0x110 [ 34.314323] mprotect_fixup+0x8d2/0xb30 [ 34.314818] do_mprotect_pkey+0x87e/0xd40 [ 34.315337] __x64_sys_mprotect+0x78/0xc0 [ 34.315853] do_syscall_64+0x3f/0x90 [ 34.316332] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.316964] [ 34.317181] Freed by task 211: [ 34.317575] kasan_save_stack+0x22/0x50 [ 34.318083] kasan_set_track+0x25/0x30 [ 34.318575] kasan_save_free_info+0x2b/0x50 [ 34.319104] __kasan_slab_free+0x10a/0x190 [ 34.319641] kmem_cache_free+0x10d/0x4d0 [ 34.320148] rcu_core+0x8c8/0x2860 [ 34.320598] __do_softirq+0x1b7/0x7d4 [ 34.321080] [ 34.321292] Last potentially related work creation: [ 34.321885] kasan_save_stack+0x22/0x50 [ 34.322391] __kasan_record_aux_stack+0x8e/0xa0 [ 34.322955] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.323593] remove_vma+0x139/0x170 [ 34.324118] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.324673] do_vmi_munmap+0x1f1/0x2b0 [ 34.325155] __vm_munmap+0x138/0x3a0 [ 34.325627] __x64_sys_munmap+0x59/0x80 [ 34.326127] do_syscall_64+0x3f/0x90 [ 34.326598] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.327232] [ 34.327445] Second to last potentially related work creation: [ 34.328126] kasan_save_stack+0x22/0x50 [ 34.328626] __kasan_record_aux_stack+0x8e/0xa0 [ 34.329194] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.329850] remove_vma+0x139/0x170 [ 34.330301] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.330857] do_vmi_munmap+0x1f1/0x2b0 [ 34.331341] mmap_region+0x1f9/0x2660 [ 34.331820] do_mmap+0x854/0xf00 [ 34.332252] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.332742] ksys_mmap_pgoff+0x3af/0x500 [ 34.333245] do_syscall_64+0x3f/0x90 [ 34.333722] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.334355] [ 34.334578] The buggy address belongs to the object at ffff88800defae80 [ 34.334578] which belongs to the cache vm_area_struct of size 168 [ 34.336068] The buggy address is located 88 bytes inside of [ 34.336068] freed 168-byte region [ffff88800defae80, ffff88800defaf28) [ 34.337492] [ 34.337720] The buggy address belongs to the physical page: [ 34.338376] page:00000000ae635c9b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdefa [ 34.339464] memcg:ffff88800c6a9301 [ 34.339910] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.340573] page_type: 0xffffffff() [ 34.341030] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 34.341988] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c6a9301 [ 34.342922] page dumped because: kasan: bad access detected [ 34.343590] [ 34.343811] Memory state around the buggy address: [ 34.344422] ffff88800defad80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 34.345309] ffff88800defae00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 34.346191] >ffff88800defae80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.347066] ^ [ 34.347826] ffff88800defaf00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 34.348685] ffff88800defaf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 34.349547] ================================================================== [ 34.350549] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 36.750965] BUG: Bad rss-counter state mm:00000000cd0f18c9 type:MM_FILEPAGES val:33 [ 36.752145] BUG: Bad rss-counter state mm:00000000cd0f18c9 type:MM_ANONPAGES val:22 [ 37.160157] BUG: Bad rss-counter state mm:00000000f60dfcc6 type:MM_FILEPAGES val:33 [ 37.161153] BUG: Bad rss-counter state mm:00000000f60dfcc6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61588' (ECDSA) to the list of known hosts. 2023/06/20 07:51:38 fuzzer started 2023/06/20 07:51:38 dialing manager at localhost:44161 2023/06/20 07:51:38 checking machine... 2023/06/20 07:51:38 checking revisions... [ 37.734527] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:51:38 testing simple program... [ 37.787488] cgroup: Unknown subsys name 'net' [ 37.833114] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:51:35 Registers: info registers vcpu 0 RAX=fffffbfff0ba77da RBX=fffffbfff0ba77db RCX=ffffffff812d869a RDX=0000000000000001 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=fffffbfff0ba77da RSP=ffff88801461f358 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000001 R12=ffffffff8560b640 R13=ffffffff81efd9bb R14=000000000000002e R15=ffff88801461f4b8 RIP=ffffffff8180ef28 RFL=00000283 [--S---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 00007f620a3c0900 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=00007f7ad9b8e650 CR3=000000000f26a000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=825f2600c2e073d700000000000ae988 XMM05=5f0d0b4460433e470000000000136838 XMM06=2c44b70157c803a30000000000135268 XMM07=fb795ef6d65770560000000000124738 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 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=00007ffcadda4518 CR3=000000001030c000 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=2038333a31353a3730203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038333a31353a3730203032 XMM08=00000000000000000000008300000100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000