syzkaller login: [ 30.102742] BUG: Bad rss-counter state mm:000000003ca2edb7 type:MM_FILEPAGES val:33 [ 30.103819] BUG: Bad rss-counter state mm:000000003ca2edb7 type:MM_ANONPAGES val:22 [ 30.282907] ================================================================== [ 30.284263] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.285456] Read of size 8 at addr ffff888018c3aa50 by task sshd/220 [ 30.286372] [ 30.286669] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.287708] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.288913] Call Trace: [ 30.289356] [ 30.289664] dump_stack_lvl+0x91/0xf0 [ 30.290325] print_report+0xcc/0x620 [ 30.290990] ? __virt_addr_valid+0x102/0x340 [ 30.291750] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.292605] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.293484] kasan_report+0xbe/0xf0 [ 30.294132] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.294979] vma_interval_tree_remove+0xc75/0xec0 [ 30.295816] vma_prepare+0xc54/0x11a0 [ 30.296321] __split_vma+0x5af/0x950 [ 30.296852] ? __pfx___split_vma+0x10/0x10 [ 30.297388] ? find_held_lock+0x2c/0x110 [ 30.297976] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.298541] ? lock_is_held_type+0x9f/0x120 [ 30.299117] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.299742] ? mtree_range_walk+0x632/0x900 [ 30.300407] ? mas_walk+0x5c7/0x7c0 [ 30.300908] do_vmi_munmap+0x1f1/0x2b0 [ 30.301410] mmap_region+0x1f9/0x2660 [ 30.301901] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.302419] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.303137] ? __pfx_lock_acquire+0x10/0x10 [ 30.303669] ? __pfx_mmap_region+0x10/0x10 [ 30.304275] ? security_mmap_addr+0x7d/0xa0 [ 30.305027] ? get_unmapped_area+0x1f5/0x3f0 [ 30.305782] do_mmap+0x854/0xf00 [ 30.306373] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.307043] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.307809] ksys_mmap_pgoff+0x3af/0x500 [ 30.308512] do_syscall_64+0x3f/0x90 [ 30.309174] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.310039] RIP: 0033:0x7f25f2954d82 [ 30.310669] 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 [ 30.313601] RSP: 002b:00007ffc439c6978 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.314841] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f25f2954d82 [ 30.316004] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f25f1d8e000 [ 30.317186] RBP: 00007f25f1d8e000 R08: 0000000000000009 R09: 0000000000001000 [ 30.318342] R10: 0000000000000812 R11: 0000000000000206 R12: 000056380b075f70 [ 30.319509] R13: 00007ffc439c6990 R14: 00007ffc439c69c0 R15: 00007ffc439c6d20 [ 30.320689] [ 30.321076] [ 30.321370] Allocated by task 213: [ 30.321945] kasan_save_stack+0x22/0x50 [ 30.322626] kasan_set_track+0x25/0x30 [ 30.323289] __kasan_slab_alloc+0x59/0x70 [ 30.323984] kmem_cache_alloc+0x16b/0x370 [ 30.324702] vm_area_dup+0x20/0x160 [ 30.325405] __split_vma+0x170/0x950 [ 30.326022] split_vma+0xc6/0x110 [ 30.326606] mprotect_fixup+0x8d2/0xb30 [ 30.327273] do_mprotect_pkey+0x87e/0xd40 [ 30.327969] __x64_sys_mprotect+0x78/0xc0 [ 30.328666] do_syscall_64+0x3f/0x90 [ 30.329299] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.330142] [ 30.330441] Freed by task 213: [ 30.330968] kasan_save_stack+0x22/0x50 [ 30.331638] kasan_set_track+0x25/0x30 [ 30.332295] kasan_save_free_info+0x2b/0x50 [ 30.333022] __kasan_slab_free+0x10a/0x190 [ 30.333724] kmem_cache_free+0x10d/0x4d0 [ 30.334441] rcu_core+0x8c8/0x2860 [ 30.335057] __do_softirq+0x1b7/0x7d4 [ 30.335719] [ 30.336011] Last potentially related work creation: [ 30.336841] kasan_save_stack+0x22/0x50 [ 30.337545] __kasan_record_aux_stack+0x8e/0xa0 [ 30.338346] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.339231] remove_vma+0x139/0x170 [ 30.339855] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.340638] do_vmi_munmap+0x1f1/0x2b0 [ 30.341322] __vm_munmap+0x138/0x3a0 [ 30.341971] __x64_sys_munmap+0x59/0x80 [ 30.342654] do_syscall_64+0x3f/0x90 [ 30.343316] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.344141] [ 30.344419] The buggy address belongs to the object at ffff888018c3a9f8 [ 30.344419] which belongs to the cache vm_area_struct of size 168 [ 30.346137] The buggy address is located 88 bytes inside of [ 30.346137] freed 168-byte region [ffff888018c3a9f8, ffff888018c3aaa0) [ 30.347798] [ 30.348087] The buggy address belongs to the physical page: [ 30.348888] page:000000001b40a9f0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18c3a [ 30.350311] memcg:ffff88801683b701 [ 30.350907] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.351565] page_type: 0xffffffff() [ 30.352048] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.353057] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801683b701 [ 30.353988] page dumped because: kasan: bad access detected [ 30.354641] [ 30.354902] Memory state around the buggy address: [ 30.355469] ffff888018c3a900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.356319] ffff888018c3a980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 30.357183] >ffff888018c3aa00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.358022] ^ [ 30.358716] ffff888018c3aa80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 30.359564] ffff888018c3ab00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.360409] ================================================================== [ 30.361446] Disabling lock debugging due to kernel taint [ 32.692718] BUG: Bad rss-counter state mm:00000000d7fe8f04 type:MM_FILEPAGES val:33 [ 32.693762] BUG: Bad rss-counter state mm:00000000d7fe8f04 type:MM_ANONPAGES val:22 [ 33.169718] BUG: Bad rss-counter state mm:00000000ca971fad type:MM_FILEPAGES val:33 [ 33.170902] BUG: Bad rss-counter state mm:00000000ca971fad type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:50463' (ECDSA) to the list of known hosts. 2023/06/20 19:14:03 fuzzer started 2023/06/20 19:14:03 dialing manager at localhost:36067 2023/06/20 19:14:03 checking machine... 2023/06/20 19:14:03 checking revisions... [ 33.873243] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:14:03 testing simple program... [ 33.922524] cgroup: Unknown subsys name 'net' [ 33.964554] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:14:02 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff8880147ffb28 RCX=0000000000000000 RDX=0000000000000070 RSI=0000000000000000 RDI=ffff8880147ffa90 RBP=ffff888014651b40 RSP=ffff8880147ffa38 R8 =0000000000000001 R9 =0000000000000000 R10=ffff8880147ffa90 R11=00000000000b6a61 R12=0000000000000000 R13=ffff8880147ffab8 R14=ffff888014651b40 R15=ffff8880147ffa90 RIP=ffffffff84513422 RFL=00000247 [---Z-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 00007f9e0d91a900 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=00007f366b536650 CR3=000000000c62e000 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=1e62c2a63078a4d900000000000ae988 XMM05=7c6a3f7eb372944500000000001328e8 XMM06=4fda316b135da52b00000000001316d8 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=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 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=00007ffd24a04c58 CR3=000000000e4e6000 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=2032303a34313a3931203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032303a34313a3931203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000