[ 26.455818] BUG: Bad rss-counter state mm:0000000071f8f632 type:MM_FILEPAGES val:33 [ 26.456412] BUG: Bad rss-counter state mm:0000000071f8f632 type:MM_ANONPAGES val:22 [ 26.484285] ================================================================== [ 26.485390] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 26.486621] Read of size 8 at addr ffff88801b841a50 by task sshd/218 [ 26.487479] [ 26.487766] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 26.488806] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 26.490024] Call Trace: [ 26.490454] [ 26.490804] dump_stack_lvl+0x91/0xf0 [ 26.491386] print_report+0xcc/0x620 [ 26.491969] ? __virt_addr_valid+0x102/0x340 [ 26.492637] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.493376] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.494047] kasan_report+0xbe/0xf0 [ 26.494626] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.495374] vma_interval_tree_remove+0xc75/0xec0 [ 26.496013] vma_prepare+0xc54/0x11a0 [ 26.496618] __split_vma+0x5af/0x950 [ 26.497089] ? __pfx___split_vma+0x10/0x10 [ 26.497647] ? find_held_lock+0x2c/0x110 [ 26.498194] do_vmi_align_munmap+0x2ba/0x11f0 [ 26.498756] ? lock_is_held_type+0x9f/0x120 [ 26.499331] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 26.499951] ? mtree_range_walk+0x632/0x900 [ 26.500515] ? mas_walk+0x5c7/0x7c0 [ 26.500992] do_vmi_munmap+0x1f1/0x2b0 [ 26.501494] mmap_region+0x1f9/0x2660 [ 26.501992] ? vm_mmap_pgoff+0x15c/0x3a0 [ 26.502513] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 26.503249] ? __pfx_lock_acquire+0x10/0x10 [ 26.503784] ? __pfx_mmap_region+0x10/0x10 [ 26.504331] ? security_mmap_addr+0x7d/0xa0 [ 26.504869] ? get_unmapped_area+0x1f5/0x3f0 [ 26.505438] do_mmap+0x854/0xf00 [ 26.505896] vm_mmap_pgoff+0x1a6/0x3a0 [ 26.506397] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 26.506966] ksys_mmap_pgoff+0x3af/0x500 [ 26.507501] do_syscall_64+0x3f/0x90 [ 26.507974] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.508650] RIP: 0033:0x7f5edf825d82 [ 26.509119] 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 [ 26.511307] RSP: 002b:00007fff98df6bc8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 26.512222] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5edf825d82 [ 26.513085] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5edec5f000 [ 26.513983] RBP: 00007f5edec5f000 R08: 0000000000000009 R09: 0000000000001000 [ 26.514852] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559d2dacbec0 [ 26.515738] R13: 00007fff98df6be0 R14: 00007fff98df6c10 R15: 00007fff98df6f70 [ 26.516637] [ 26.516934] [ 26.517157] Allocated by task 208: [ 26.517602] kasan_save_stack+0x22/0x50 [ 26.518135] kasan_set_track+0x25/0x30 [ 26.518650] __kasan_slab_alloc+0x59/0x70 [ 26.519198] kmem_cache_alloc+0x16b/0x370 [ 26.519718] vm_area_dup+0x20/0x160 [ 26.520186] __split_vma+0x170/0x950 [ 26.520665] split_vma+0xc6/0x110 [ 26.521103] mprotect_fixup+0x8d2/0xb30 [ 26.521616] do_mprotect_pkey+0x87e/0xd40 [ 26.522161] __x64_sys_mprotect+0x78/0xc0 [ 26.522708] do_syscall_64+0x3f/0x90 [ 26.523191] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.523835] [ 26.524050] Freed by task 208: [ 26.524470] kasan_save_stack+0x22/0x50 [ 26.524971] kasan_set_track+0x25/0x30 [ 26.525491] kasan_save_free_info+0x2b/0x50 [ 26.526044] __kasan_slab_free+0x10a/0x190 [ 26.526617] kmem_cache_free+0x10d/0x4d0 [ 26.527131] rcu_core+0x8c8/0x2860 [ 26.527596] __do_softirq+0x1b7/0x7d4 [ 26.528067] [ 26.528303] Last potentially related work creation: [ 26.528903] kasan_save_stack+0x22/0x50 [ 26.529420] __kasan_record_aux_stack+0x8e/0xa0 [ 26.530092] __call_rcu_common.constprop.0+0x6a/0xb90 [ 26.530751] remove_vma+0x139/0x170 [ 26.531226] do_vmi_align_munmap+0xd4a/0x11f0 [ 26.531795] do_vmi_munmap+0x1f1/0x2b0 [ 26.532306] __vm_munmap+0x138/0x3a0 [ 26.532787] __x64_sys_munmap+0x59/0x80 [ 26.533295] do_syscall_64+0x3f/0x90 [ 26.533807] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.534482] [ 26.534699] The buggy address belongs to the object at ffff88801b8419f8 [ 26.534699] which belongs to the cache vm_area_struct of size 168 [ 26.536235] The buggy address is located 88 bytes inside of [ 26.536235] freed 168-byte region [ffff88801b8419f8, ffff88801b841aa0) [ 26.537708] [ 26.537934] The buggy address belongs to the physical page: [ 26.538635] page:00000000df043782 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1b841 [ 26.539737] memcg:ffff88801b834101 [ 26.540173] flags: 0x100000000000200(slab|node=0|zone=1) [ 26.540819] page_type: 0xffffffff() [ 26.541293] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 26.542562] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801b834101 [ 26.543792] page dumped because: kasan: bad access detected [ 26.544690] [ 26.544978] Memory state around the buggy address: [ 26.545792] ffff88801b841900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 26.546869] ffff88801b841980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 26.547759] >ffff88801b841a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 26.548625] ^ [ 26.549350] ffff88801b841a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 26.550275] ffff88801b841b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 26.551135] ================================================================== [ 26.552217] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 29.376478] BUG: Bad rss-counter state mm:0000000097081596 type:MM_FILEPAGES val:33 [ 29.377579] BUG: Bad rss-counter state mm:0000000097081596 type:MM_ANONPAGES val:22 [ 29.919241] BUG: Bad rss-counter state mm:00000000591f0fa6 type:MM_FILEPAGES val:33 [ 29.920331] BUG: Bad rss-counter state mm:00000000591f0fa6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:22024' (ECDSA) to the list of known hosts. 2023/06/19 14:29:57 fuzzer started 2023/06/19 14:29:57 dialing manager at localhost:44161 2023/06/19 14:29:57 checking machine... 2023/06/19 14:29:57 checking revisions... [ 30.689313] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:29:58 testing simple program... [ 30.737692] cgroup: Unknown subsys name 'net' [ 30.783000] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:29:55 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000000 RCX=ffffffff8153457f RDX=fffffbfff0ba77db RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=ffffffff8450c042 RSP=ffff88800c697f10 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffff88800c697f58 R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8135b8e0 RFL=00000047 [---Z-PC] 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=00007fd4d0699230 CR3=0000000010278000 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=756e696c2d34365f3638782f62696c2f XMM01=6461657268747062696c2f756e672d78 XMM02=00302e6f732e6461657268747062696c XMM03=2f756e672d78756e696c2d34365f3638 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff888008e58001 RBX=ffff888008e57930 RCX=0000000000000001 RDX=ffff888008e57d01 RSI=ffff888008e57d20 RDI=ffff888008e57940 RBP=ffff888008e57d20 RSP=ffff888008e57888 R8 =0000000000000001 R9 =ffff888008e57970 R10=0000000000038001 R11=0000000000020cb4 R12=0000000000000008 R13=ffff888008e50000 R14=ffff888008e57d20 R15=ffff888008e57930 RIP=ffffffff8113048d RFL=00000297 [--S-APC] 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=0000555a9a054818 CR3=0000000009f94000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=e299fa846ee0773000000000000ae988 XMM05=eadb0a1172b4364b0000000000134338 XMM06=751b9502027dc0b90000000000133110 XMM07=fb795ef6d65770560000000000122860 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000