[ 30.827227] BUG: Bad rss-counter state mm:00000000eb5bda07 type:MM_FILEPAGES val:33 [ 30.828478] BUG: Bad rss-counter state mm:00000000eb5bda07 type:MM_ANONPAGES val:22 [ 30.865527] ================================================================== [ 30.866507] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.867447] Read of size 8 at addr ffff88801a5366b0 by task sshd/219 [ 30.868215] [ 30.868434] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.869321] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.870296] Call Trace: [ 30.870616] [ 30.870903] dump_stack_lvl+0x91/0xf0 [ 30.871394] print_report+0xcc/0x620 [ 30.871891] ? __virt_addr_valid+0x102/0x340 [ 30.872454] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.873083] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.873715] kasan_report+0xbe/0xf0 [ 30.874202] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.874826] vma_interval_tree_remove+0xc75/0xec0 [ 30.875444] vma_prepare+0xc54/0x11a0 [ 30.875930] __split_vma+0x5af/0x950 [ 30.876406] ? __pfx___split_vma+0x10/0x10 [ 30.876943] ? find_held_lock+0x2c/0x110 [ 30.877490] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.878057] ? lock_is_held_type+0x9f/0x120 [ 30.878607] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.879214] ? mtree_range_walk+0x632/0x900 [ 30.879764] ? mas_walk+0x5c7/0x7c0 [ 30.880234] do_vmi_munmap+0x1f1/0x2b0 [ 30.880722] mmap_region+0x1f9/0x2660 [ 30.881215] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.881725] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.882435] ? __pfx_lock_acquire+0x10/0x10 [ 30.882966] ? __pfx_mmap_region+0x10/0x10 [ 30.883498] ? security_mmap_addr+0x7d/0xa0 [ 30.884024] ? get_unmapped_area+0x1f5/0x3f0 [ 30.884568] do_mmap+0x854/0xf00 [ 30.885014] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.885527] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.886094] ksys_mmap_pgoff+0x3af/0x500 [ 30.886603] do_syscall_64+0x3f/0x90 [ 30.887092] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.887735] RIP: 0033:0x7f1aecb03d82 [ 30.888193] 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 [ 30.890345] RSP: 002b:00007ffef655ec48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.891258] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1aecb03d82 [ 30.892135] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1aebf3d000 [ 30.893174] RBP: 00007f1aebf3d000 R08: 0000000000000009 R09: 0000000000001000 [ 30.894047] R10: 0000000000000812 R11: 0000000000000206 R12: 000055acb9f01ec0 [ 30.894923] R13: 00007ffef655ec60 R14: 00007ffef655ec90 R15: 00007ffef655eff0 [ 30.895830] [ 30.896129] [ 30.896348] Allocated by task 211: [ 30.896790] kasan_save_stack+0x22/0x50 [ 30.897335] kasan_set_track+0x25/0x30 [ 30.897847] __kasan_slab_alloc+0x59/0x70 [ 30.898392] kmem_cache_alloc+0x16b/0x370 [ 30.898928] vm_area_dup+0x20/0x160 [ 30.899392] __split_vma+0x170/0x950 [ 30.899872] split_vma+0xc6/0x110 [ 30.900321] mprotect_fixup+0x8d2/0xb30 [ 30.900847] do_mprotect_pkey+0x87e/0xd40 [ 30.901376] __x64_sys_mprotect+0x78/0xc0 [ 30.901908] do_syscall_64+0x3f/0x90 [ 30.902390] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.903050] [ 30.903278] Freed by task 211: [ 30.903683] kasan_save_stack+0x22/0x50 [ 30.904204] kasan_set_track+0x25/0x30 [ 30.904706] kasan_save_free_info+0x2b/0x50 [ 30.905256] __kasan_slab_free+0x10a/0x190 [ 30.905797] kmem_cache_free+0x10d/0x4d0 [ 30.906314] rcu_core+0x8c8/0x2860 [ 30.906760] __do_softirq+0x1b7/0x7d4 [ 30.907247] [ 30.907463] Last potentially related work creation: [ 30.908054] kasan_save_stack+0x22/0x50 [ 30.908563] __kasan_record_aux_stack+0x8e/0xa0 [ 30.909157] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.909801] remove_vma+0x139/0x170 [ 30.910252] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.910818] do_vmi_munmap+0x1f1/0x2b0 [ 30.911307] __vm_munmap+0x138/0x3a0 [ 30.911779] __x64_sys_munmap+0x59/0x80 [ 30.912275] do_syscall_64+0x3f/0x90 [ 30.912754] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.913415] [ 30.913629] The buggy address belongs to the object at ffff88801a536658 [ 30.913629] which belongs to the cache vm_area_struct of size 168 [ 30.915118] The buggy address is located 88 bytes inside of [ 30.915118] freed 168-byte region [ffff88801a536658, ffff88801a536700) [ 30.916525] [ 30.916747] The buggy address belongs to the physical page: [ 30.917427] page:0000000012f1c6e8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a536 [ 30.918545] memcg:ffff88801a528301 [ 30.918972] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.919636] page_type: 0xffffffff() [ 30.920092] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.921023] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a528301 [ 30.921948] page dumped because: kasan: bad access detected [ 30.922615] [ 30.922838] Memory state around the buggy address: [ 30.923415] ffff88801a536580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.924269] ffff88801a536600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.925136] >ffff88801a536680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.925989] ^ [ 30.926571] ffff88801a536700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.927431] ffff88801a536780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.928293] ================================================================== [ 30.929491] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 32.673976] BUG: Bad rss-counter state mm:00000000db2a29c8 type:MM_FILEPAGES val:33 [ 32.675137] BUG: Bad rss-counter state mm:00000000db2a29c8 type:MM_ANONPAGES val:22 [ 33.156171] BUG: Bad rss-counter state mm:00000000dd535850 type:MM_FILEPAGES val:33 [ 33.157345] BUG: Bad rss-counter state mm:00000000dd535850 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:20284' (ECDSA) to the list of known hosts. 2023/06/21 07:56:52 fuzzer started 2023/06/21 07:56:52 dialing manager at localhost:36067 2023/06/21 07:56:52 checking machine... 2023/06/21 07:56:52 checking revisions... [ 33.801993] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:56:52 testing simple program... [ 33.864229] cgroup: Unknown subsys name 'net' [ 33.901731] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:56:51 Registers: info registers vcpu 0 RAX=ffff888016127b28 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff888016127a01 RSI=ffff888016127a60 RDI=ffff888016127a60 RBP=ffff888016127ae8 RSP=ffff8880161279d0 R8 =0000000000000001 R9 =ffff888016127ad0 R10=0000000000038001 R11=0000000000006097 R12=ffff888016127af0 R13=ffff888016127ad8 R14=ffff888016127a60 R15=ffff888016127a90 RIP=ffffffff81131236 RFL=00000202 [-------] 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 00007fe16ea69900 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=00007fe16f0210b0 CR3=000000000ee02000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007f692c910a10 CR3=000000000ca8c000 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=0cc4c2af0d8c489bfa466b5ebab771e8 XMM02=ec2efd57dc4c00df000000000011b770 XMM03=632bb9d064b1ae4f000000000011b840 XMM04=838579b67b5c6e1300000000000ae988 XMM05=dfcdbad4f1609c3700000000001314e8 XMM06=04b3bab32ca871f800000000001306c0 XMM07=e042d86d42eb936e0000000000121c68 XMM08=632bb9d064b1ae4f000000000011b840 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000