[ 24.841746] BUG: Bad rss-counter state mm:0000000054a00b0e type:MM_FILEPAGES val:33 [ 24.842718] BUG: Bad rss-counter state mm:0000000054a00b0e type:MM_ANONPAGES val:22 [ 24.953778] ================================================================== [ 24.954662] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.955775] Read of size 8 at addr ffff88801b81e798 by task sshd/220 [ 24.956685] [ 24.956950] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 24.957984] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.959218] Call Trace: [ 24.959678] [ 24.960018] dump_stack_lvl+0x91/0xf0 [ 24.960599] print_report+0xcc/0x620 [ 24.961204] ? __virt_addr_valid+0x102/0x340 [ 24.961878] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.962290] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.962633] kasan_report+0xbe/0xf0 [ 24.962899] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.963278] vma_interval_tree_remove+0xc75/0xec0 [ 24.963638] vma_prepare+0xc54/0x11a0 [ 24.963923] __split_vma+0x5af/0x950 [ 24.964207] ? __pfx___split_vma+0x10/0x10 [ 24.964531] ? find_held_lock+0x2c/0x110 [ 24.964847] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.965186] ? lock_is_held_type+0x9f/0x120 [ 24.965510] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.965880] ? mtree_range_walk+0x632/0x900 [ 24.966214] ? mas_walk+0x5c7/0x7c0 [ 24.966495] do_vmi_munmap+0x1f1/0x2b0 [ 24.966795] mmap_region+0x1f9/0x2660 [ 24.967087] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.967422] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.967845] ? __pfx_lock_acquire+0x10/0x10 [ 24.968164] ? __pfx_mmap_region+0x10/0x10 [ 24.968483] ? security_mmap_addr+0x7d/0xa0 [ 24.968804] ? get_unmapped_area+0x1f5/0x3f0 [ 24.969142] do_mmap+0x854/0xf00 [ 24.969408] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.969705] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.970047] ksys_mmap_pgoff+0x3af/0x500 [ 24.970348] do_syscall_64+0x3f/0x90 [ 24.970636] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.971022] RIP: 0033:0x7f320b3d3d82 [ 24.971300] 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 [ 24.972607] RSP: 002b:00007ffce53e06b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.973160] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f320b3d3d82 [ 24.973669] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f320a80d000 [ 24.974194] RBP: 00007f320a80d000 R08: 0000000000000009 R09: 0000000000001000 [ 24.974707] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557f69903ec0 [ 24.975227] R13: 00007ffce53e06d0 R14: 00007ffce53e0700 R15: 00007ffce53e0a60 [ 24.975745] [ 24.975919] [ 24.976050] Allocated by task 213: [ 24.976313] kasan_save_stack+0x22/0x50 [ 24.976613] kasan_set_track+0x25/0x30 [ 24.976908] __kasan_slab_alloc+0x59/0x70 [ 24.977228] kmem_cache_alloc+0x16b/0x370 [ 24.977533] vm_area_dup+0x20/0x160 [ 24.977811] __split_vma+0x170/0x950 [ 24.978081] split_vma+0xc6/0x110 [ 24.978347] mprotect_fixup+0x8d2/0xb30 [ 24.978644] do_mprotect_pkey+0x87e/0xd40 [ 24.978960] __x64_sys_mprotect+0x78/0xc0 [ 24.979276] do_syscall_64+0x3f/0x90 [ 24.979565] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.979949] [ 24.980080] Freed by task 211: [ 24.980315] kasan_save_stack+0x22/0x50 [ 24.980615] kasan_set_track+0x25/0x30 [ 24.980918] kasan_save_free_info+0x2b/0x50 [ 24.981248] __kasan_slab_free+0x10a/0x190 [ 24.981572] kmem_cache_free+0x10d/0x4d0 [ 24.981875] rcu_core+0x8c8/0x2860 [ 24.982139] __do_softirq+0x1b7/0x7d4 [ 24.982424] [ 24.982555] Last potentially related work creation: [ 24.982915] kasan_save_stack+0x22/0x50 [ 24.983217] __kasan_record_aux_stack+0x8e/0xa0 [ 24.983566] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.983953] remove_vma+0x139/0x170 [ 24.984230] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.984572] do_vmi_munmap+0x1f1/0x2b0 [ 24.984864] __vm_munmap+0x138/0x3a0 [ 24.985155] __x64_sys_munmap+0x59/0x80 [ 24.985451] do_syscall_64+0x3f/0x90 [ 24.985736] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.986127] [ 24.986253] The buggy address belongs to the object at ffff88801b81e740 [ 24.986253] which belongs to the cache vm_area_struct of size 168 [ 24.987130] The buggy address is located 88 bytes inside of [ 24.987130] freed 168-byte region [ffff88801b81e740, ffff88801b81e7e8) [ 24.988052] [ 24.988181] The buggy address belongs to the physical page: [ 24.988573] page:0000000060e15845 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1b81e [ 24.989250] memcg:ffff88800c7eb801 [ 24.989502] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.989889] page_type: 0xffffffff() [ 24.990162] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 24.990725] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c7eb801 [ 24.991272] page dumped because: kasan: bad access detected [ 24.991672] [ 24.991805] Memory state around the buggy address: [ 24.992162] ffff88801b81e680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.992678] ffff88801b81e700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 24.993202] >ffff88801b81e780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 24.993720] ^ [ 24.994016] ffff88801b81e800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 24.994535] ffff88801b81e880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 24.995033] ================================================================== [ 24.995620] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.901169] BUG: Bad rss-counter state mm:00000000a970b76d type:MM_FILEPAGES val:33 [ 26.902389] BUG: Bad rss-counter state mm:00000000a970b76d type:MM_ANONPAGES val:22 [ 27.256491] BUG: Bad rss-counter state mm:00000000392574b5 type:MM_FILEPAGES val:33 [ 27.257743] BUG: Bad rss-counter state mm:00000000392574b5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38732' (ECDSA) to the list of known hosts. 2023/06/19 20:58:27 fuzzer started 2023/06/19 20:58:28 dialing manager at localhost:44161 2023/06/19 20:58:28 checking machine... 2023/06/19 20:58:28 checking revisions... [ 27.925889] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:58:28 testing simple program... [ 27.978358] cgroup: Unknown subsys name 'net' [ 28.028111] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:58:26 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff861472c4 RDX=1ffff11001b2be95 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff88800d95f4b8 RSP=ffff88800d95f3f0 R8 =ffffffff861472c8 R9 =ffff88800d95f4a0 R10=0000000000038001 R11=00000000000237d4 R12=ffff88800d95f4c0 R13=ffff88800d95f4a8 R14=0000000000000005 R15=ffff88800d95f460 RIP=ffffffff81130b54 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 00007f9202ec0900 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=00007f798b1ea650 CR3=000000000d4aa000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=d2612ccbb9cc1a6600000000000ae988 XMM05=7a3dfde3852a56110000000000134d48 XMM06=4fda316b135da52b00000000001337c8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 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=00007ffe7d0253a8 CR3=000000000c44e000 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=2037323a38353a3032203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037323a38353a3032203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000