syzkaller login: [ 30.816677] BUG: Bad rss-counter state mm:0000000083564395 type:MM_FILEPAGES val:33 [ 30.817969] BUG: Bad rss-counter state mm:0000000083564395 type:MM_ANONPAGES val:22 [ 30.976356] ================================================================== [ 30.977283] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.978227] Read of size 8 at addr ffff88801892f6b0 by task sshd/221 [ 30.979051] [ 30.979284] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.980152] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.981130] Call Trace: [ 30.981452] [ 30.981742] dump_stack_lvl+0x91/0xf0 [ 30.982237] print_report+0xcc/0x620 [ 30.982725] ? __virt_addr_valid+0x102/0x340 [ 30.983302] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.983931] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.984554] kasan_report+0xbe/0xf0 [ 30.985035] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.985677] vma_interval_tree_remove+0xc75/0xec0 [ 30.986295] vma_prepare+0xc54/0x11a0 [ 30.986797] __split_vma+0x5af/0x950 [ 30.987299] ? __pfx___split_vma+0x10/0x10 [ 30.987858] ? find_held_lock+0x2c/0x110 [ 30.988409] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.989009] ? lock_is_held_type+0x9f/0x120 [ 30.989571] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.990211] ? mtree_range_walk+0x632/0x900 [ 30.990781] ? mas_walk+0x5c7/0x7c0 [ 30.991292] do_vmi_munmap+0x1f1/0x2b0 [ 30.991814] mmap_region+0x1f9/0x2660 [ 30.992326] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.992872] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.993621] ? __pfx_lock_acquire+0x10/0x10 [ 30.994185] ? __pfx_mmap_region+0x10/0x10 [ 30.994736] ? security_mmap_addr+0x7d/0xa0 [ 30.995303] ? get_unmapped_area+0x1f5/0x3f0 [ 30.995880] do_mmap+0x854/0xf00 [ 30.996342] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.996866] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.997455] ksys_mmap_pgoff+0x3af/0x500 [ 30.997994] do_syscall_64+0x3f/0x90 [ 30.998497] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.999181] RIP: 0033:0x7f382e1e7d82 [ 30.999670] 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 [ 31.001878] RSP: 002b:00007ffc9f14d9c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.002818] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f382e1e7d82 [ 31.003730] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f382d621000 [ 31.004622] RBP: 00007f382d621000 R08: 0000000000000009 R09: 0000000000001000 [ 31.005497] R10: 0000000000000812 R11: 0000000000000206 R12: 000056327aca7ec0 [ 31.006376] R13: 00007ffc9f14d9e0 R14: 00007ffc9f14da10 R15: 00007ffc9f14dd70 [ 31.007287] [ 31.007592] [ 31.007822] Allocated by task 214: [ 31.008274] kasan_save_stack+0x22/0x50 [ 31.008793] kasan_set_track+0x25/0x30 [ 31.009312] __kasan_slab_alloc+0x59/0x70 [ 31.009865] kmem_cache_alloc+0x16b/0x370 [ 31.010403] vm_area_dup+0x20/0x160 [ 31.010880] __split_vma+0x170/0x950 [ 31.011378] split_vma+0xc6/0x110 [ 31.011843] mprotect_fixup+0x8d2/0xb30 [ 31.012365] do_mprotect_pkey+0x87e/0xd40 [ 31.012912] __x64_sys_mprotect+0x78/0xc0 [ 31.013456] do_syscall_64+0x3f/0x90 [ 31.013945] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.014616] [ 31.014848] Freed by task 214: [ 31.015263] kasan_save_stack+0x22/0x50 [ 31.015808] kasan_set_track+0x25/0x30 [ 31.016327] kasan_save_free_info+0x2b/0x50 [ 31.016901] __kasan_slab_free+0x10a/0x190 [ 31.017464] kmem_cache_free+0x10d/0x4d0 [ 31.017997] rcu_core+0x8c8/0x2860 [ 31.018461] __do_softirq+0x1b7/0x7d4 [ 31.018961] [ 31.019183] Last potentially related work creation: [ 31.019795] kasan_save_stack+0x22/0x50 [ 31.020322] __kasan_record_aux_stack+0x8e/0xa0 [ 31.020924] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.021592] remove_vma+0x139/0x170 [ 31.022060] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.022635] do_vmi_munmap+0x1f1/0x2b0 [ 31.023142] __vm_munmap+0x138/0x3a0 [ 31.023631] __x64_sys_munmap+0x59/0x80 [ 31.024146] do_syscall_64+0x3f/0x90 [ 31.024633] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.025304] [ 31.025522] The buggy address belongs to the object at ffff88801892f658 [ 31.025522] which belongs to the cache vm_area_struct of size 168 [ 31.027052] The buggy address is located 88 bytes inside of [ 31.027052] freed 168-byte region [ffff88801892f658, ffff88801892f700) [ 31.028522] [ 31.028748] The buggy address belongs to the physical page: [ 31.029437] page:000000009aa9f294 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1892f [ 31.030571] memcg:ffff88801a095b01 [ 31.031014] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.031689] page_type: 0xffffffff() [ 31.032160] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.033130] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a095b01 [ 31.034070] page dumped because: kasan: bad access detected [ 31.034756] [ 31.034984] Memory state around the buggy address: [ 31.035590] ffff88801892f580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.036500] ffff88801892f600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.037389] >ffff88801892f680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.038280] ^ [ 31.038887] ffff88801892f700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.039798] ffff88801892f780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.040681] ================================================================== [ 31.041691] Disabling lock debugging due to kernel taint [ 32.926548] BUG: Bad rss-counter state mm:00000000a7116b39 type:MM_FILEPAGES val:33 [ 32.927818] BUG: Bad rss-counter state mm:00000000a7116b39 type:MM_ANONPAGES val:22 [ 33.494071] BUG: Bad rss-counter state mm:00000000cd82acd1 type:MM_FILEPAGES val:33 [ 33.495256] BUG: Bad rss-counter state mm:00000000cd82acd1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:42380' (ECDSA) to the list of known hosts. 2023/06/19 14:33:51 fuzzer started 2023/06/19 14:33:52 dialing manager at localhost:44161 2023/06/19 14:33:52 checking machine... 2023/06/19 14:33:52 checking revisions... [ 34.130242] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:33:52 testing simple program... [ 34.185935] cgroup: Unknown subsys name 'net' [ 34.265907] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:33:51 Registers: info registers vcpu 0 RAX=0000000080000101 RBX=ffff88807ffd7010 RCX=0000000000000100 RDX=ffffffff8542a6c0 RSI=ffffffff811432ca RDI=0000000000000007 RBP=000000000f2b1410 RSP=ffff88806ce09d58 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000002 R11=0000000000000000 R12=0000000000000000 R13=ffffea000000000f R14=0000000000000002 R15=ffff88800e0e4300 RIP=ffffffff814c0800 RFL=00000206 [-----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 0000000000000000 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=00007f57106ddfd0 CR3=000000000cae2000 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=2031353a33333a3431203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031353a33333a3431203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffffff813ad420 RCX=ffffffff86128101 RDX=1ffff11003133d9b RSI=ffffffff84506c7f RDI=ffff88801899ecd8 RBP=ffff88801899ed70 RSP=ffff88801899ecb0 R8 =ffffffff86128140 R9 =ffff88801899ed18 R10=0000000000038001 R11=000000000001e4e6 R12=ffff88801899eda0 R13=0000000000000000 R14=ffff88800903d1c0 R15=ffff88801899ecd8 RIP=ffffffff811305f0 RFL=00000212 [----A--] 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 00007f89f7842900 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=00007f89f780c008 CR3=000000000cb6c000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000