[ 24.777639] BUG: Bad rss-counter state mm:00000000298e88eb type:MM_FILEPAGES val:33 [ 24.778927] BUG: Bad rss-counter state mm:00000000298e88eb type:MM_ANONPAGES val:22 [ 24.829526] ================================================================== [ 24.830483] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.831424] Read of size 8 at addr ffff8880136476b0 by task sshd/220 [ 24.832307] [ 24.832592] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 24.833467] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.834460] Call Trace: [ 24.834807] [ 24.835096] dump_stack_lvl+0x91/0xf0 [ 24.835591] print_report+0xcc/0x620 [ 24.836076] ? __virt_addr_valid+0x102/0x340 [ 24.836636] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.837259] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.837886] kasan_report+0xbe/0xf0 [ 24.838368] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.839005] vma_interval_tree_remove+0xc75/0xec0 [ 24.839613] vma_prepare+0xc54/0x11a0 [ 24.840102] __split_vma+0x5af/0x950 [ 24.840587] ? __pfx___split_vma+0x10/0x10 [ 24.841125] ? find_held_lock+0x2c/0x110 [ 24.841656] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.842232] ? lock_is_held_type+0x9f/0x120 [ 24.842796] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.843414] ? mtree_range_walk+0x632/0x900 [ 24.843969] ? mas_walk+0x5c7/0x7c0 [ 24.844446] do_vmi_munmap+0x1f1/0x2b0 [ 24.844944] mmap_region+0x1f9/0x2660 [ 24.845438] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.845963] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.846690] ? __pfx_lock_acquire+0x10/0x10 [ 24.847232] ? __pfx_mmap_region+0x10/0x10 [ 24.847770] ? security_mmap_addr+0x7d/0xa0 [ 24.848304] ? get_unmapped_area+0x1f5/0x3f0 [ 24.848861] do_mmap+0x854/0xf00 [ 24.849304] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.849803] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.850372] ksys_mmap_pgoff+0x3af/0x500 [ 24.850890] do_syscall_64+0x3f/0x90 [ 24.851374] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.852028] RIP: 0033:0x7f6130419d82 [ 24.852495] 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 [ 24.854659] RSP: 002b:00007fff8c35e358 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.855567] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6130419d82 [ 24.856421] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f612f853000 [ 24.857279] RBP: 00007f612f853000 R08: 0000000000000009 R09: 0000000000001000 [ 24.858130] R10: 0000000000000812 R11: 0000000000000206 R12: 000055853ed2db20 [ 24.858992] R13: 00007fff8c35e370 R14: 00007fff8c35e3a0 R15: 00007fff8c35e700 [ 24.859844] [ 24.860144] [ 24.860360] Allocated by task 213: [ 24.860792] kasan_save_stack+0x22/0x50 [ 24.861300] kasan_set_track+0x25/0x30 [ 24.861800] __kasan_slab_alloc+0x59/0x70 [ 24.862326] kmem_cache_alloc+0x16b/0x370 [ 24.862876] vm_area_dup+0x20/0x160 [ 24.863335] __split_vma+0x170/0x950 [ 24.863808] split_vma+0xc6/0x110 [ 24.864253] mprotect_fixup+0x8d2/0xb30 [ 24.864754] do_mprotect_pkey+0x87e/0xd40 [ 24.865277] __x64_sys_mprotect+0x78/0xc0 [ 24.865798] do_syscall_64+0x3f/0x90 [ 24.866275] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.866925] [ 24.867144] Freed by task 211: [ 24.867548] kasan_save_stack+0x22/0x50 [ 24.868056] kasan_set_track+0x25/0x30 [ 24.868562] kasan_save_free_info+0x2b/0x50 [ 24.869109] __kasan_slab_free+0x10a/0x190 [ 24.869652] kmem_cache_free+0x10d/0x4d0 [ 24.870225] rcu_core+0x8c8/0x2860 [ 24.870702] __do_softirq+0x1b7/0x7d4 [ 24.871187] [ 24.871402] Last potentially related work creation: [ 24.871997] kasan_save_stack+0x22/0x50 [ 24.872504] __kasan_record_aux_stack+0x8e/0xa0 [ 24.873090] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.873742] remove_vma+0x139/0x170 [ 24.874200] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.874774] do_vmi_munmap+0x1f1/0x2b0 [ 24.875265] __vm_munmap+0x138/0x3a0 [ 24.875737] __x64_sys_munmap+0x59/0x80 [ 24.876234] do_syscall_64+0x3f/0x90 [ 24.876719] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.877371] [ 24.877592] Second to last potentially related work creation: [ 24.878284] kasan_save_stack+0x22/0x50 [ 24.878805] __kasan_record_aux_stack+0x8e/0xa0 [ 24.879386] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.880039] remove_vma+0x139/0x170 [ 24.880499] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.881064] do_vmi_munmap+0x1f1/0x2b0 [ 24.881554] mmap_region+0x1f9/0x2660 [ 24.882033] do_mmap+0x854/0xf00 [ 24.882486] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.882985] ksys_mmap_pgoff+0x3af/0x500 [ 24.883491] do_syscall_64+0x3f/0x90 [ 24.883971] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.884616] [ 24.884836] The buggy address belongs to the object at ffff888013647658 [ 24.884836] which belongs to the cache vm_area_struct of size 168 [ 24.886323] The buggy address is located 88 bytes inside of [ 24.886323] freed 168-byte region [ffff888013647658, ffff888013647700) [ 24.887764] [ 24.887988] The buggy address belongs to the physical page: [ 24.888655] page:00000000c6e47f12 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x13647 [ 24.889767] memcg:ffff88800ddcdd01 [ 24.890203] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.890876] page_type: 0xffffffff() [ 24.891329] raw: 0100000000000200 ffff88800879fc80 ffffea000031b740 dead000000000004 [ 24.892344] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ddcdd01 [ 24.893498] page dumped because: kasan: bad access detected [ 24.894332] [ 24.894606] Memory state around the buggy address: [ 24.895337] ffff888013647580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.896398] ffff888013647600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 24.897472] >ffff888013647680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.898566] ^ [ 24.899290] ffff888013647700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 24.900333] ffff888013647780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 24.901142] ================================================================== [ 24.902034] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 27.095652] BUG: Bad rss-counter state mm:00000000004cab99 type:MM_FILEPAGES val:33 [ 27.096639] BUG: Bad rss-counter state mm:00000000004cab99 type:MM_ANONPAGES val:22 [ 27.689128] BUG: Bad rss-counter state mm:00000000f0e8c0b7 type:MM_FILEPAGES val:33 [ 27.690294] BUG: Bad rss-counter state mm:00000000f0e8c0b7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:29719' (ECDSA) to the list of known hosts. 2023/06/20 10:44:48 fuzzer started 2023/06/20 10:44:48 dialing manager at localhost:44161 2023/06/20 10:44:48 checking machine... 2023/06/20 10:44:48 checking revisions... [ 28.357427] kmemleak: Automatic memory scanning thread ended 2023/06/20 10:44:48 testing simple program... [ 28.413642] cgroup: Unknown subsys name 'net' [ 28.504642] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:44:47 Registers: info registers vcpu 0 RAX=0000000000000100 RBX=ffffffff85d3d00c RCX=ffffffff812be30d RDX=1ffff11001e6214e RSI=0000000000000008 RDI=ffff88800f310a78 RBP=ffff88800f310a70 RSP=ffff88800f1afe20 R8 =0000000000000000 R9 =ffffed1001e6214e R10=ffff88800f310a77 R11=0000000000000000 R12=1ffff11001e35fc8 R13=ffff88800f310ad8 R14=0000000000000000 R15=ffff88800f310a78 RIP=ffffffff8180fd20 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007ff533648900 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=00007ff5335fc01c CR3=0000000019a68000 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=00007ffcaec1c6f8 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=00007fa19be2451000005630d491b790 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