syzkaller login: [ 31.798108] BUG: Bad rss-counter state mm:00000000c45f7718 type:MM_FILEPAGES val:33 [ 31.799229] BUG: Bad rss-counter state mm:00000000c45f7718 type:MM_ANONPAGES val:22 [ 31.977203] ================================================================== [ 31.978296] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.979469] Read of size 8 at addr ffff88801a50e058 by task sshd/220 [ 31.980356] [ 31.980586] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.981505] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.982550] Call Trace: [ 31.982888] [ 31.983197] dump_stack_lvl+0x91/0xf0 [ 31.983718] print_report+0xcc/0x620 [ 31.984247] ? __virt_addr_valid+0x102/0x340 [ 31.984845] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.985511] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.986171] kasan_report+0xbe/0xf0 [ 31.986680] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.987343] vma_interval_tree_remove+0xc75/0xec0 [ 31.988010] vma_prepare+0xc54/0x11a0 [ 31.988529] __split_vma+0x5af/0x950 [ 31.989041] ? __pfx___split_vma+0x10/0x10 [ 31.989616] ? find_held_lock+0x2c/0x110 [ 31.990178] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.990789] ? lock_is_held_type+0x9f/0x120 [ 31.991368] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.992031] ? mtree_range_walk+0x632/0x900 [ 31.992639] ? mas_walk+0x5c7/0x7c0 [ 31.993164] do_vmi_munmap+0x1f1/0x2b0 [ 31.993697] mmap_region+0x1f9/0x2660 [ 31.994222] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.994768] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.995535] ? __pfx_lock_acquire+0x10/0x10 [ 31.996125] ? __pfx_mmap_region+0x10/0x10 [ 31.996695] ? security_mmap_addr+0x7d/0xa0 [ 31.997271] ? get_unmapped_area+0x1f5/0x3f0 [ 31.997867] do_mmap+0x854/0xf00 [ 31.998342] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.998885] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.999480] ksys_mmap_pgoff+0x3af/0x500 [ 32.000042] do_syscall_64+0x3f/0x90 [ 32.000560] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.001273] RIP: 0033:0x7f3f65b77d82 [ 32.001764] 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 [ 32.004076] RSP: 002b:00007ffe2d2a6a98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.005055] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3f65b77d82 [ 32.005971] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3f64fb1000 [ 32.006886] RBP: 00007f3f64fb1000 R08: 0000000000000009 R09: 0000000000001000 [ 32.007792] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564605927ec0 [ 32.008715] R13: 00007ffe2d2a6ab0 R14: 00007ffe2d2a6ae0 R15: 00007ffe2d2a6e40 [ 32.009643] [ 32.009958] [ 32.010190] Allocated by task 213: [ 32.010658] kasan_save_stack+0x22/0x50 [ 32.011203] kasan_set_track+0x25/0x30 [ 32.011727] __kasan_slab_alloc+0x59/0x70 [ 32.012310] kmem_cache_alloc+0x16b/0x370 [ 32.012860] vm_area_dup+0x20/0x160 [ 32.013343] __split_vma+0x170/0x950 [ 32.013848] split_vma+0xc6/0x110 [ 32.014329] mprotect_fixup+0x8d2/0xb30 [ 32.014870] do_mprotect_pkey+0x87e/0xd40 [ 32.015424] __x64_sys_mprotect+0x78/0xc0 [ 32.015997] do_syscall_64+0x3f/0x90 [ 32.016512] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.017208] [ 32.017435] Freed by task 213: [ 32.017856] kasan_save_stack+0x22/0x50 [ 32.018396] kasan_set_track+0x25/0x30 [ 32.018928] kasan_save_free_info+0x2b/0x50 [ 32.019497] __kasan_slab_free+0x10a/0x190 [ 32.020082] kmem_cache_free+0x10d/0x4d0 [ 32.020630] rcu_core+0x8c8/0x2860 [ 32.021106] __do_softirq+0x1b7/0x7d4 [ 32.021630] [ 32.021860] Last potentially related work creation: [ 32.022489] kasan_save_stack+0x22/0x50 [ 32.023035] __kasan_record_aux_stack+0x8e/0xa0 [ 32.023654] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.024354] remove_vma+0x139/0x170 [ 32.024841] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.025448] do_vmi_munmap+0x1f1/0x2b0 [ 32.025966] __vm_munmap+0x138/0x3a0 [ 32.026474] __x64_sys_munmap+0x59/0x80 [ 32.027013] do_syscall_64+0x3f/0x90 [ 32.027523] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.028233] [ 32.028467] The buggy address belongs to the object at ffff88801a50e000 [ 32.028467] which belongs to the cache vm_area_struct of size 168 [ 32.030037] The buggy address is located 88 bytes inside of [ 32.030037] freed 168-byte region [ffff88801a50e000, ffff88801a50e0a8) [ 32.031559] [ 32.031795] The buggy address belongs to the physical page: [ 32.032495] page:000000001099b681 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a50e [ 32.033652] memcg:ffff88801a50f001 [ 32.034111] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.034809] page_type: 0xffffffff() [ 32.035295] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 32.036287] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a50f001 [ 32.037261] page dumped because: kasan: bad access detected [ 32.037961] [ 32.038195] Memory state around the buggy address: [ 32.038815] ffff88801a50df00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 32.039738] ffff88801a50df80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 32.040660] >ffff88801a50e000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.041570] ^ [ 32.042364] ffff88801a50e080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 32.043287] ffff88801a50e100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.044221] ================================================================== [ 32.045490] Disabling lock debugging due to kernel taint [ 33.843501] BUG: Bad rss-counter state mm:00000000b080b5c3 type:MM_FILEPAGES val:33 [ 33.844765] BUG: Bad rss-counter state mm:00000000b080b5c3 type:MM_ANONPAGES val:22 [ 34.408166] BUG: Bad rss-counter state mm:0000000008689138 type:MM_FILEPAGES val:33 [ 34.409385] BUG: Bad rss-counter state mm:0000000008689138 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:40366' (ECDSA) to the list of known hosts. 2023/06/20 12:32:05 fuzzer started 2023/06/20 12:32:06 dialing manager at localhost:36067 2023/06/20 12:32:06 checking machine... 2023/06/20 12:32:06 checking revisions... [ 35.056252] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:32:06 testing simple program... [ 35.108110] cgroup: Unknown subsys name 'net' [ 35.179975] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:32:05 Registers: info registers vcpu 0 RAX=00007efdee6a5b70 RBX=00005606acf3b740 RCX=0000000000000400 RDX=0000000000000001 RSI=00007efdee0e9003 RDI=00000000000001d8 RBP=00007efdee0e915e RSP=00007fffe35f01c8 R8 =00007efdee0f36f8 R9 =00007efdee6a5be0 R10=000000000000006e R11=0000000000000000 R12=00007efdee0e9003 R13=00007efdee0f36f8 R14=0000000000000001 R15=00005606acf3b770 RIP=00007efdee5710f7 RFL=00000206 [-----P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007efdee0f3900 00000000 00000000 GS =0000 0000000000000000 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=00007efdee6ab0b0 CR3=0000000017424000 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=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=00007ffcb9b79a68 CR3=000000000e4ca000 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=2035303a32333a3231203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035303a32333a3231203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000