[ 44.398736] BUG: Bad rss-counter state mm:000000006064df19 type:MM_FILEPAGES val:33 [ 44.399763] BUG: Bad rss-counter state mm:000000006064df19 type:MM_ANONPAGES val:22 [ 44.564781] ================================================================== [ 44.565805] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 44.566750] Read of size 8 at addr ffff88800d7b9310 by task sshd/220 [ 44.567588] [ 44.567809] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 44.568677] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 44.569650] Call Trace: [ 44.569973] [ 44.570260] dump_stack_lvl+0x91/0xf0 [ 44.570753] print_report+0xcc/0x620 [ 44.571241] ? __virt_addr_valid+0x102/0x340 [ 44.571790] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.572416] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.573042] kasan_report+0xbe/0xf0 [ 44.573519] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.574150] vma_interval_tree_remove+0xc75/0xec0 [ 44.574763] vma_prepare+0xc54/0x11a0 [ 44.575245] __split_vma+0x5af/0x950 [ 44.575721] ? __pfx___split_vma+0x10/0x10 [ 44.576281] ? find_held_lock+0x2c/0x110 [ 44.576798] do_vmi_align_munmap+0x2ba/0x11f0 [ 44.577363] ? lock_is_held_type+0x9f/0x120 [ 44.577908] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 44.578517] ? mtree_range_walk+0x632/0x900 [ 44.579070] ? mas_walk+0x5c7/0x7c0 [ 44.579552] do_vmi_munmap+0x1f1/0x2b0 [ 44.580043] mmap_region+0x1f9/0x2660 [ 44.580539] ? vm_mmap_pgoff+0x15c/0x3a0 [ 44.581050] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 44.581776] ? __pfx_lock_acquire+0x10/0x10 [ 44.582315] ? __pfx_mmap_region+0x10/0x10 [ 44.582847] ? security_mmap_addr+0x7d/0xa0 [ 44.583396] ? get_unmapped_area+0x1f5/0x3f0 [ 44.583960] do_mmap+0x854/0xf00 [ 44.584410] vm_mmap_pgoff+0x1a6/0x3a0 [ 44.584909] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 44.585489] ksys_mmap_pgoff+0x3af/0x500 [ 44.586014] do_syscall_64+0x3f/0x90 [ 44.586514] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.587173] RIP: 0033:0x7f81261f6d82 [ 44.587629] 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 [ 44.589830] RSP: 002b:00007ffec2d6e628 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 44.590750] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f81261f6d82 [ 44.591602] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8125630000 [ 44.592469] RBP: 00007f8125630000 R08: 0000000000000009 R09: 0000000000001000 [ 44.593308] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d8c40dbec0 [ 44.594159] R13: 00007ffec2d6e640 R14: 00007ffec2d6e670 R15: 00007ffec2d6e9d0 [ 44.595027] [ 44.595322] [ 44.595538] Allocated by task 213: [ 44.595967] kasan_save_stack+0x22/0x50 [ 44.596493] kasan_set_track+0x25/0x30 [ 44.596987] __kasan_slab_alloc+0x59/0x70 [ 44.597511] kmem_cache_alloc+0x16b/0x370 [ 44.598027] vm_area_dup+0x20/0x160 [ 44.598486] __split_vma+0x170/0x950 [ 44.598953] split_vma+0xc6/0x110 [ 44.599392] mprotect_fixup+0x8d2/0xb30 [ 44.599895] do_mprotect_pkey+0x87e/0xd40 [ 44.600433] __x64_sys_mprotect+0x78/0xc0 [ 44.600953] do_syscall_64+0x3f/0x90 [ 44.601426] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.602068] [ 44.602288] Freed by task 204: [ 44.602682] kasan_save_stack+0x22/0x50 [ 44.603185] kasan_set_track+0x25/0x30 [ 44.603679] kasan_save_free_info+0x2b/0x50 [ 44.604214] __kasan_slab_free+0x10a/0x190 [ 44.604767] kmem_cache_free+0x10d/0x4d0 [ 44.605287] rcu_core+0x8c8/0x2860 [ 44.605736] __do_softirq+0x1b7/0x7d4 [ 44.606217] [ 44.606437] Last potentially related work creation: [ 44.607021] kasan_save_stack+0x22/0x50 [ 44.607537] __kasan_record_aux_stack+0x8e/0xa0 [ 44.608111] __call_rcu_common.constprop.0+0x6a/0xb90 [ 44.608782] remove_vma+0x139/0x170 [ 44.609242] do_vmi_align_munmap+0xd4a/0x11f0 [ 44.609807] do_vmi_munmap+0x1f1/0x2b0 [ 44.610302] __vm_munmap+0x138/0x3a0 [ 44.610771] __x64_sys_munmap+0x59/0x80 [ 44.611277] do_syscall_64+0x3f/0x90 [ 44.611763] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.612413] [ 44.612635] The buggy address belongs to the object at ffff88800d7b92b8 [ 44.612635] which belongs to the cache vm_area_struct of size 168 [ 44.614105] The buggy address is located 88 bytes inside of [ 44.614105] freed 168-byte region [ffff88800d7b92b8, ffff88800d7b9360) [ 44.615531] [ 44.615750] The buggy address belongs to the physical page: [ 44.616413] page:00000000cbcebe83 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd7b9 [ 44.617495] memcg:ffff88800e0f2401 [ 44.617922] flags: 0x100000000000200(slab|node=0|zone=1) [ 44.618570] page_type: 0xffffffff() [ 44.619027] raw: 0100000000000200 ffff88800879fc80 ffffea00003a2280 dead000000000008 [ 44.619953] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e0f2401 [ 44.620881] page dumped because: kasan: bad access detected [ 44.621538] [ 44.621756] Memory state around the buggy address: [ 44.622335] ffff88800d7b9200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 44.623199] ffff88800d7b9280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 44.624070] >ffff88800d7b9300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 44.624925] ^ [ 44.625392] ffff88800d7b9380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 44.626251] ffff88800d7b9400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 44.627101] ================================================================== [ 44.628421] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 46.597011] BUG: Bad rss-counter state mm:000000001ce05289 type:MM_FILEPAGES val:33 [ 46.598013] BUG: Bad rss-counter state mm:000000001ce05289 type:MM_ANONPAGES val:22 [ 47.109533] BUG: Bad rss-counter state mm:00000000b4695386 type:MM_FILEPAGES val:33 [ 47.110616] BUG: Bad rss-counter state mm:00000000b4695386 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:23401' (ECDSA) to the list of known hosts. 2023/06/19 14:09:47 fuzzer started 2023/06/19 14:09:47 dialing manager at localhost:44161 2023/06/19 14:09:47 checking machine... 2023/06/19 14:09:47 checking revisions... [ 47.833990] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:09:47 testing simple program... [ 47.880843] cgroup: Unknown subsys name 'net' [ 47.919793] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:09:33 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=0000000000000000 RCX=ffffffff81851830 RDX=ffff888017691b40 RSI=0000000000000000 RDI=0000000000000005 RBP=ffff88800cc6aa00 RSP=ffff88800f5d7ed8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffff888008c13480 R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff814c07eb 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f8328113900 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=00007fff67b33ed8 CR3=000000000dbf2000 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=00000000000000000000000000000000 XMM01=ff0000000000ffff0000000000ff0000 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=0000000000000005 RBX=0000000000000001 RCX=ffffffff8450d49f RDX=0000000000000005 RSI=ffffffff864b19b0 RDI=ffffffff8604e26c RBP=ffffffff8604e26c RSP=ffff88806cf099b8 R8 =ffffffff864b19b0 R9 =ffff88806cf09ab0 R10=0000000000038001 R11=00000000000b53a6 R12=ffffffff8604e27c R13=ffffffff8604e26c R14=ffffffff8604e26c R15=dffffc0000000000 RIP=ffffffff8112fc49 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 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=00007feee4491640 CR3=000000000cbb0000 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=ea330ce63c29ed99d24b24a3911f34bf XMM02=000000000011d978eff9b2d0a8fce9cb XMM03=000000000011da482c67c8bc2e329bc3 XMM04=c159334199159dca00000000000ae988 XMM05=ec2db54c1d9c5a7d0000000000134940 XMM06=4fda316b135da52b00000000001333c0 XMM07=fb795ef6d65770560000000000123c10 XMM08=2c67c8bc2e329bc3000000000011d9e8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000