[ 52.708534] BUG: Bad rss-counter state mm:00000000297be62e type:MM_FILEPAGES val:33 [ 52.709736] BUG: Bad rss-counter state mm:00000000297be62e type:MM_ANONPAGES val:22 [ 52.869337] ================================================================== [ 52.870251] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 52.871198] Read of size 8 at addr ffff88800d428ed8 by task sshd/220 [ 52.871965] [ 52.872196] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 52.873209] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 52.874194] Call Trace: [ 52.874515] [ 52.874803] dump_stack_lvl+0x91/0xf0 [ 52.875290] print_report+0xcc/0x620 [ 52.875780] ? __virt_addr_valid+0x102/0x340 [ 52.876360] ? vma_interval_tree_remove+0xc75/0xec0 [ 52.876991] ? vma_interval_tree_remove+0xc75/0xec0 [ 52.877615] kasan_report+0xbe/0xf0 [ 52.878094] ? vma_interval_tree_remove+0xc75/0xec0 [ 52.878709] vma_interval_tree_remove+0xc75/0xec0 [ 52.879314] vma_prepare+0xc54/0x11a0 [ 52.879793] __split_vma+0x5af/0x950 [ 52.880283] ? __pfx___split_vma+0x10/0x10 [ 52.880822] ? find_held_lock+0x2c/0x110 [ 52.881341] do_vmi_align_munmap+0x2ba/0x11f0 [ 52.881915] ? lock_is_held_type+0x9f/0x120 [ 52.882452] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 52.883055] ? mtree_range_walk+0x632/0x900 [ 52.883599] ? mas_walk+0x5c7/0x7c0 [ 52.884086] do_vmi_munmap+0x1f1/0x2b0 [ 52.884584] mmap_region+0x1f9/0x2660 [ 52.885069] ? vm_mmap_pgoff+0x15c/0x3a0 [ 52.885579] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 52.886291] ? __pfx_lock_acquire+0x10/0x10 [ 52.886829] ? __pfx_mmap_region+0x10/0x10 [ 52.887369] ? security_mmap_addr+0x7d/0xa0 [ 52.887907] ? get_unmapped_area+0x1f5/0x3f0 [ 52.888476] do_mmap+0x854/0xf00 [ 52.888927] vm_mmap_pgoff+0x1a6/0x3a0 [ 52.889432] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 52.890002] ksys_mmap_pgoff+0x3af/0x500 [ 52.890513] do_syscall_64+0x3f/0x90 [ 52.891000] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 52.891658] RIP: 0033:0x7f8ac1a0ed82 [ 52.892134] 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 [ 52.894274] RSP: 002b:00007ffc1a0fcff8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 52.895193] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8ac1a0ed82 [ 52.896075] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8ac0e48000 [ 52.896966] RBP: 00007f8ac0e48000 R08: 0000000000000009 R09: 0000000000001000 [ 52.897853] R10: 0000000000000812 R11: 0000000000000206 R12: 000056285ff50f70 [ 52.898726] R13: 00007ffc1a0fd010 R14: 00007ffc1a0fd040 R15: 00007ffc1a0fd3a0 [ 52.899619] [ 52.899925] [ 52.900172] Allocated by task 213: [ 52.900615] kasan_save_stack+0x22/0x50 [ 52.901137] kasan_set_track+0x25/0x30 [ 52.901651] __kasan_slab_alloc+0x59/0x70 [ 52.902203] kmem_cache_alloc+0x16b/0x370 [ 52.902738] vm_area_dup+0x20/0x160 [ 52.903209] __split_vma+0x170/0x950 [ 52.903700] split_vma+0xc6/0x110 [ 52.904158] mprotect_fixup+0x8d2/0xb30 [ 52.904684] do_mprotect_pkey+0x87e/0xd40 [ 52.905223] __x64_sys_mprotect+0x78/0xc0 [ 52.905777] do_syscall_64+0x3f/0x90 [ 52.906272] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 52.906947] [ 52.907175] Freed by task 213: [ 52.907582] kasan_save_stack+0x22/0x50 [ 52.908114] kasan_set_track+0x25/0x30 [ 52.908625] kasan_save_free_info+0x2b/0x50 [ 52.909172] __kasan_slab_free+0x10a/0x190 [ 52.909727] kmem_cache_free+0x10d/0x4d0 [ 52.910251] rcu_core+0x8c8/0x2860 [ 52.910717] __do_softirq+0x1b7/0x7d4 [ 52.911217] [ 52.911444] Last potentially related work creation: [ 52.912088] kasan_save_stack+0x22/0x50 [ 52.912607] __kasan_record_aux_stack+0x8e/0xa0 [ 52.913208] __call_rcu_common.constprop.0+0x6a/0xb90 [ 52.913881] remove_vma+0x139/0x170 [ 52.914353] do_vmi_align_munmap+0xd4a/0x11f0 [ 52.914933] do_vmi_munmap+0x1f1/0x2b0 [ 52.915445] __vm_munmap+0x138/0x3a0 [ 52.915933] __x64_sys_munmap+0x59/0x80 [ 52.916463] do_syscall_64+0x3f/0x90 [ 52.916963] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 52.917635] [ 52.917858] Second to last potentially related work creation: [ 52.918579] kasan_save_stack+0x22/0x50 [ 52.919102] __kasan_record_aux_stack+0x8e/0xa0 [ 52.919707] __call_rcu_common.constprop.0+0x6a/0xb90 [ 52.920383] remove_vma+0x139/0x170 [ 52.920856] do_vmi_align_munmap+0xd4a/0x11f0 [ 52.921433] do_vmi_munmap+0x1f1/0x2b0 [ 52.921944] mmap_region+0x1f9/0x2660 [ 52.922448] do_mmap+0x854/0xf00 [ 52.922899] vm_mmap_pgoff+0x1a6/0x3a0 [ 52.923420] ksys_mmap_pgoff+0x3af/0x500 [ 52.924100] do_syscall_64+0x3f/0x90 [ 52.924732] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 52.925567] [ 52.925834] The buggy address belongs to the object at ffff88800d428e80 [ 52.925834] which belongs to the cache vm_area_struct of size 168 [ 52.927552] The buggy address is located 88 bytes inside of [ 52.927552] freed 168-byte region [ffff88800d428e80, ffff88800d428f28) [ 52.929050] [ 52.929274] The buggy address belongs to the physical page: [ 52.929967] page:00000000e3637d62 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd428 [ 52.931095] memcg:ffff88800de44301 [ 52.931550] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 52.932356] page_type: 0xffffffff() [ 52.932909] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 52.934046] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800de44301 [ 52.935167] page dumped because: kasan: bad access detected [ 52.935881] [ 52.936127] Memory state around the buggy address: [ 52.936739] ffff88800d428d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 52.937645] ffff88800d428e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 52.938529] >ffff88800d428e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 52.939411] ^ [ 52.940186] ffff88800d428f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 52.941081] ffff88800d428f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 52.941974] ================================================================== [ 52.943032] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 55.262698] BUG: Bad rss-counter state mm:0000000010db9b58 type:MM_FILEPAGES val:33 [ 55.264308] BUG: Bad rss-counter state mm:0000000010db9b58 type:MM_ANONPAGES val:22 [ 55.810666] BUG: Bad rss-counter state mm:00000000fc16b984 type:MM_FILEPAGES val:33 [ 55.811600] BUG: Bad rss-counter state mm:00000000fc16b984 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:27147' (ECDSA) to the list of known hosts. 2023/06/19 13:11:43 fuzzer started 2023/06/19 13:11:43 dialing manager at localhost:44161 2023/06/19 13:11:43 checking machine... 2023/06/19 13:11:43 checking revisions... [ 56.605030] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:11:43 testing simple program... [ 56.654511] cgroup: Unknown subsys name 'net' [ 56.704285] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:11:21 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff8180ee7e RCX=ffffffff86137501 RDX=1ffff1100d9c1359 RSI=0000000000000000 RDI=ffffffff8180ee7e RBP=ffffffff8180ee7e RSP=ffff88806ce09a20 R8 =ffffffff8613751e R9 =ffff88806ce09ab0 R10=0000000000038001 R11=0000000000020d8a R12=0000000000000001 R13=0000000000000000 R14=ffff888019e91b40 R15=ffff88801a1825c0 RIP=ffffffff811fc772 RFL=00000287 [--S--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 00007f8d04ddd900 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=00007f8d04d9101c CR3=000000000c908000 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=ffffffff00ffffffffffffffffffffff XMM01=707465675f6c697475646f6d6d61705f XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 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=ffff888008c58400 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=00007ffc256a2f98 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=00007f0b10a9d510000055f145a95790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000