syzkaller login: [ 30.941891] BUG: Bad rss-counter state mm:000000009f40ec47 type:MM_FILEPAGES val:33 [ 30.943054] BUG: Bad rss-counter state mm:000000009f40ec47 type:MM_ANONPAGES val:22 [ 30.982874] ================================================================== [ 30.983792] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.984745] Read of size 8 at addr ffff88800e577058 by task sshd/219 [ 30.985649] [ 30.985866] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.986735] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.987736] Call Trace: [ 30.988050] [ 30.988332] dump_stack_lvl+0x91/0xf0 [ 30.988826] print_report+0xcc/0x620 [ 30.989334] ? __virt_addr_valid+0x102/0x340 [ 30.989889] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.990508] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.991125] kasan_report+0xbe/0xf0 [ 30.991608] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.992231] vma_interval_tree_remove+0xc75/0xec0 [ 30.992831] vma_prepare+0xc54/0x11a0 [ 30.993312] __split_vma+0x5af/0x950 [ 30.993798] ? __pfx___split_vma+0x10/0x10 [ 30.994322] ? find_held_lock+0x2c/0x110 [ 30.994834] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.995391] ? lock_is_held_type+0x9f/0x120 [ 30.995933] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.996528] ? mtree_range_walk+0x632/0x900 [ 30.997104] ? mas_walk+0x5c7/0x7c0 [ 30.997578] do_vmi_munmap+0x1f1/0x2b0 [ 30.998072] mmap_region+0x1f9/0x2660 [ 30.998550] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.999062] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.999768] ? __pfx_lock_acquire+0x10/0x10 [ 31.000304] ? __pfx_mmap_region+0x10/0x10 [ 31.000844] ? security_mmap_addr+0x7d/0xa0 [ 31.001387] ? get_unmapped_area+0x1f5/0x3f0 [ 31.001943] do_mmap+0x854/0xf00 [ 31.002376] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.002868] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.003423] ksys_mmap_pgoff+0x3af/0x500 [ 31.003933] do_syscall_64+0x3f/0x90 [ 31.004405] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.005054] RIP: 0033:0x7fee6feeed82 [ 31.005515] 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 [ 31.007608] RSP: 002b:00007ffd3e261f78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.008501] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fee6feeed82 [ 31.009359] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fee6f328000 [ 31.010204] RBP: 00007fee6f328000 R08: 0000000000000009 R09: 0000000000001000 [ 31.011048] R10: 0000000000000812 R11: 0000000000000206 R12: 00005615798b7ec0 [ 31.011885] R13: 00007ffd3e261f90 R14: 00007ffd3e261fc0 R15: 00007ffd3e262320 [ 31.012739] [ 31.013029] [ 31.013257] Allocated by task 212: [ 31.013692] kasan_save_stack+0x22/0x50 [ 31.014196] kasan_set_track+0x25/0x30 [ 31.014688] __kasan_slab_alloc+0x59/0x70 [ 31.015209] kmem_cache_alloc+0x16b/0x370 [ 31.015726] vm_area_dup+0x20/0x160 [ 31.016176] __split_vma+0x170/0x950 [ 31.016642] split_vma+0xc6/0x110 [ 31.017087] mprotect_fixup+0x8d2/0xb30 [ 31.017584] do_mprotect_pkey+0x87e/0xd40 [ 31.018104] __x64_sys_mprotect+0x78/0xc0 [ 31.018621] do_syscall_64+0x3f/0x90 [ 31.019097] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.019742] [ 31.019957] Freed by task 212: [ 31.020345] kasan_save_stack+0x22/0x50 [ 31.020843] kasan_set_track+0x25/0x30 [ 31.021354] kasan_save_free_info+0x2b/0x50 [ 31.021895] __kasan_slab_free+0x10a/0x190 [ 31.022431] kmem_cache_free+0x10d/0x4d0 [ 31.022940] rcu_core+0x8c8/0x2860 [ 31.023394] __do_softirq+0x1b7/0x7d4 [ 31.023873] [ 31.024143] Last potentially related work creation: [ 31.024742] kasan_save_stack+0x22/0x50 [ 31.025255] __kasan_record_aux_stack+0x8e/0xa0 [ 31.025830] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.026462] remove_vma+0x139/0x170 [ 31.026915] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.027467] do_vmi_munmap+0x1f1/0x2b0 [ 31.027949] __vm_munmap+0x138/0x3a0 [ 31.028413] __x64_sys_munmap+0x59/0x80 [ 31.028904] do_syscall_64+0x3f/0x90 [ 31.029386] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.030020] [ 31.030232] Second to last potentially related work creation: [ 31.030907] kasan_save_stack+0x22/0x50 [ 31.031411] __kasan_record_aux_stack+0x8e/0xa0 [ 31.031983] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.032614] remove_vma+0x139/0x170 [ 31.033072] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.033625] do_vmi_munmap+0x1f1/0x2b0 [ 31.034109] mmap_region+0x1f9/0x2660 [ 31.034592] do_mmap+0x854/0xf00 [ 31.035019] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.035504] ksys_mmap_pgoff+0x3af/0x500 [ 31.036006] do_syscall_64+0x3f/0x90 [ 31.036477] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.037121] [ 31.037337] The buggy address belongs to the object at ffff88800e577000 [ 31.037337] which belongs to the cache vm_area_struct of size 168 [ 31.038784] The buggy address is located 88 bytes inside of [ 31.038784] freed 168-byte region [ffff88800e577000, ffff88800e5770a8) [ 31.040167] [ 31.040380] The buggy address belongs to the physical page: [ 31.041028] page:000000008da7caf2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe577 [ 31.042148] memcg:ffff88800d3ce301 [ 31.042571] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.043268] page_type: 0xffffffff() [ 31.043712] raw: 0100000000000200 ffff8880087a0c80 ffffea0000393380 dead000000000003 [ 31.044624] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d3ce301 [ 31.045534] page dumped because: kasan: bad access detected [ 31.046192] [ 31.046406] Memory state around the buggy address: [ 31.046979] ffff88800e576f00: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc [ 31.047836] ffff88800e576f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.048688] >ffff88800e577000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.049547] ^ [ 31.050262] ffff88800e577080: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 [ 31.051110] ffff88800e577100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.051962] ================================================================== [ 31.052968] Disabling lock debugging due to kernel taint [ 33.533785] BUG: Bad rss-counter state mm:00000000900920e5 type:MM_FILEPAGES val:33 [ 33.535231] BUG: Bad rss-counter state mm:00000000900920e5 type:MM_ANONPAGES val:22 [ 34.116969] BUG: Bad rss-counter state mm:000000002cda7dab type:MM_FILEPAGES val:33 [ 34.118231] BUG: Bad rss-counter state mm:000000002cda7dab type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:33741' (ECDSA) to the list of known hosts. 2023/06/20 13:48:09 fuzzer started 2023/06/20 13:48:09 dialing manager at localhost:36067 2023/06/20 13:48:09 checking machine... 2023/06/20 13:48:09 checking revisions... [ 34.794475] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:48:10 testing simple program... [ 34.837274] cgroup: Unknown subsys name 'net' [ 34.895794] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:48:09 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000002 RCX=ffffffff860d2fdc RDX=1ffff1100d9c1360 RSI=1ffff1100d9c135e RDI=ffff88806ce09b00 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =ffffffff860d2fe0 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=000000000000fdcc R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88806ce09f80 R15=ffff88806ce09a98 RIP=ffffffff811310f5 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 00007fd0f558a900 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=00007fd0f5b3f650 CR3=000000000c54e000 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=2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c XMM01=00ff00000000000000000000000000ff XMM02=00ff00000000000000000000000000ff XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=6500273d2720676e6974636570786500 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=00007f03698f1000 CR3=000000000cc84000 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=13924fe2f03a64b4da44948038b68d0a XMM02=000000000011abf8d59e07bde36eea69 XMM03=000000000011ad20ec2efd57dc4c00df XMM04=1045eb07d09ed1c800000000000ae988 XMM05=12972001e1b3ff500000000000133e30 XMM06=dfcdbad4f1609c370000000000132978 XMM07=fb795ef6d65770560000000000121a70 XMM08=2c67c8bc2e329bc3000000000011ad20 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000