syzkaller login: [ 60.821493] BUG: Bad rss-counter state mm:0000000051d56673 type:MM_FILEPAGES val:33 [ 60.823094] BUG: Bad rss-counter state mm:0000000051d56673 type:MM_ANONPAGES val:22 [ 60.977703] ================================================================== [ 60.978601] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 60.979553] Read of size 8 at addr ffff888019cdb310 by task sshd/221 [ 60.980323] [ 60.980541] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 60.981481] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 60.982460] Call Trace: [ 60.982803] <TASK> [ 60.983087] dump_stack_lvl+0x91/0xf0 [ 60.983594] print_report+0xcc/0x620 [ 60.984086] ? __virt_addr_valid+0x102/0x340 [ 60.984638] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.985268] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.985889] kasan_report+0xbe/0xf0 [ 60.986376] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.986997] vma_interval_tree_remove+0xc75/0xec0 [ 60.987639] vma_prepare+0xc54/0x11a0 [ 60.988132] __split_vma+0x5af/0x950 [ 60.988627] ? __pfx___split_vma+0x10/0x10 [ 60.989184] ? find_held_lock+0x2c/0x110 [ 60.989738] do_vmi_align_munmap+0x2ba/0x11f0 [ 60.990335] ? lock_is_held_type+0x9f/0x120 [ 60.990900] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 60.991549] ? mtree_range_walk+0x632/0x900 [ 60.992122] ? mas_walk+0x5c7/0x7c0 [ 60.992623] do_vmi_munmap+0x1f1/0x2b0 [ 60.993150] mmap_region+0x1f9/0x2660 [ 60.993652] ? vm_mmap_pgoff+0x15c/0x3a0 [ 60.994184] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 60.994941] ? __pfx_lock_acquire+0x10/0x10 [ 60.995510] ? __pfx_mmap_region+0x10/0x10 [ 60.996068] ? security_mmap_addr+0x7d/0xa0 [ 60.996625] ? get_unmapped_area+0x1f5/0x3f0 [ 60.997196] do_mmap+0x854/0xf00 [ 60.997652] vm_mmap_pgoff+0x1a6/0x3a0 [ 60.998171] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 60.998772] ksys_mmap_pgoff+0x3af/0x500 [ 60.999312] do_syscall_64+0x3f/0x90 [ 60.999822] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.000507] RIP: 0033:0x7f336208fd82 [ 61.000984] 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 [ 61.003228] RSP: 002b:00007fffaeb8b938 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 61.004201] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f336208fd82 [ 61.005088] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f33614c9000 [ 61.005978] RBP: 00007f33614c9000 R08: 0000000000000009 R09: 0000000000001000 [ 61.006874] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b3b19c0f70 [ 61.007775] R13: 00007fffaeb8b950 R14: 00007fffaeb8b980 R15: 00007fffaeb8bce0 [ 61.008685] </TASK> [ 61.008987] [ 61.009209] Allocated by task 214: [ 61.009660] kasan_save_stack+0x22/0x50 [ 61.010193] kasan_set_track+0x25/0x30 [ 61.010705] __kasan_slab_alloc+0x59/0x70 [ 61.011262] kmem_cache_alloc+0x16b/0x370 [ 61.011799] vm_area_dup+0x20/0x160 [ 61.012279] __split_vma+0x170/0x950 [ 61.012768] split_vma+0xc6/0x110 [ 61.013223] mprotect_fixup+0x8d2/0xb30 [ 61.013754] do_mprotect_pkey+0x87e/0xd40 [ 61.014298] __x64_sys_mprotect+0x78/0xc0 [ 61.014844] do_syscall_64+0x3f/0x90 [ 61.015357] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.016030] [ 61.016257] Freed by task 214: [ 61.016664] kasan_save_stack+0x22/0x50 [ 61.017199] kasan_set_track+0x25/0x30 [ 61.017708] kasan_save_free_info+0x2b/0x50 [ 61.018270] __kasan_slab_free+0x10a/0x190 [ 61.018829] kmem_cache_free+0x10d/0x4d0 [ 61.019365] rcu_core+0x8c8/0x2860 [ 61.019829] __do_softirq+0x1b7/0x7d4 [ 61.020326] [ 61.020547] Last potentially related work creation: [ 61.021164] kasan_save_stack+0x22/0x50 [ 61.021695] __kasan_record_aux_stack+0x8e/0xa0 [ 61.022292] __call_rcu_common.constprop.0+0x6a/0xb90 [ 61.022963] remove_vma+0x139/0x170 [ 61.023453] do_vmi_align_munmap+0xd4a/0x11f0 [ 61.024035] do_vmi_munmap+0x1f1/0x2b0 [ 61.024542] __vm_munmap+0x138/0x3a0 [ 61.025034] __x64_sys_munmap+0x59/0x80 [ 61.025564] do_syscall_64+0x3f/0x90 [ 61.026057] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.026732] [ 61.026959] The buggy address belongs to the object at ffff888019cdb2b8 [ 61.026959] which belongs to the cache vm_area_struct of size 168 [ 61.028501] The buggy address is located 88 bytes inside of [ 61.028501] freed 168-byte region [ffff888019cdb2b8, ffff888019cdb360) [ 61.029970] [ 61.030196] The buggy address belongs to the physical page: [ 61.030893] page:00000000ccb7507e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19cdb [ 61.032067] memcg:ffff88801691f401 [ 61.032525] flags: 0x100000000000200(slab|node=0|zone=1) [ 61.033207] page_type: 0xffffffff() [ 61.033665] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 61.034587] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801691f401 [ 61.035532] page dumped because: kasan: bad access detected [ 61.036190] [ 61.036407] Memory state around the buggy address: [ 61.036982] ffff888019cdb200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 61.037842] ffff888019cdb280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 61.038719] >ffff888019cdb300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 61.039595] ^ [ 61.040059] ffff888019cdb380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 61.040922] ffff888019cdb400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 61.041784] ================================================================== [ 61.042759] Disabling lock debugging due to kernel taint [ 62.825460] BUG: Bad rss-counter state mm:00000000cf52be43 type:MM_FILEPAGES val:33 [ 62.826192] BUG: Bad rss-counter state mm:00000000cf52be43 type:MM_ANONPAGES val:22 [ 63.292499] BUG: Bad rss-counter state mm:000000001fcea671 type:MM_FILEPAGES val:33 [ 63.294326] BUG: Bad rss-counter state mm:000000001fcea671 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:5539' (ECDSA) to the list of known hosts. 2023/06/20 07:38:34 fuzzer started 2023/06/20 07:38:34 dialing manager at localhost:44161 2023/06/20 07:38:34 checking machine... 2023/06/20 07:38:34 checking revisions... [ 64.005708] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:38:34 testing simple program... [ 64.042650] cgroup: Unknown subsys name 'net' [ 64.101854] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:38:34 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=0000000000000001 RDX=1ffff1100207bf48 RSI=ffffffff811fc524 RDI=ffff8880103df9e8 RBP=ffff8880103dfa40 RSP=ffff8880103df978 R8 =0000000000000001 R9 =ffff8880103dfa28 R10=0000000000038001 R11=0000000000022999 R12=ffff8880103dfab0 R13=0000000000000000 R14=ffff888017c751c0 R15=ffff8880103df9e8 RIP=ffffffff8113062c 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 00007f270cf92900 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=00007ffdc9de3000 CR3=0000000016938000 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=00ff0000000000000000000000000000 XMM02=2f00646f6874656d5f74707972636e65 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ff00ffffffffffffffffffffffffffff XMM08=20002020202020200020202020202020 XMM09=0000ffffffffffffffffffffffffffff XMM10=00002020202020200020202020202020 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff860d68f6 RBX=ffffffff85dbc1f4 RCX=ffffffff813ad6cf RDX=0000000000000000 RSI=ffffffff860d68c0 RDI=ffffffff85dbc1cc RBP=ffffffff85dbc1f4 RSP=ffff888008e578a8 R8 =ffffffff860d68c0 R9 =ffff888008e57990 R10=0000000000038001 R11=0000000000010b7e R12=ffffffff85dbc1f0 R13=ffffffff85dbc1cc R14=0000000000000009 R15=dffffc0000000000 RIP=ffffffff8112fcb7 RFL=00000282 [--S----] 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=00007fbb9012a320 CR3=0000000014324000 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=2034333a38333a3730203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033333a38333a3730203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000