syzkaller login: [ 29.775564] BUG: Bad rss-counter state mm:000000005f0d46fc type:MM_FILEPAGES val:33 [ 29.777120] BUG: Bad rss-counter state mm:000000005f0d46fc type:MM_ANONPAGES val:22 [ 29.936159] ================================================================== [ 29.937156] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.938169] Read of size 8 at addr ffff888009880a50 by task sshd/220 [ 29.939209] [ 29.939444] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 29.940393] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.941456] Call Trace: [ 29.941802] [ 29.942112] dump_stack_lvl+0x91/0xf0 [ 29.942641] print_report+0xcc/0x620 [ 29.943167] ? __virt_addr_valid+0x102/0x340 [ 29.943768] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.944449] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.945115] kasan_report+0xbe/0xf0 [ 29.945629] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.946290] vma_interval_tree_remove+0xc75/0xec0 [ 29.946937] vma_prepare+0xc54/0x11a0 [ 29.947455] __split_vma+0x5af/0x950 [ 29.947964] ? __pfx___split_vma+0x10/0x10 [ 29.948549] ? find_held_lock+0x2c/0x110 [ 29.949136] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.949761] ? lock_is_held_type+0x9f/0x120 [ 29.950363] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.951038] ? mtree_range_walk+0x632/0x900 [ 29.951647] ? mas_walk+0x5c7/0x7c0 [ 29.952192] do_vmi_munmap+0x1f1/0x2b0 [ 29.952739] mmap_region+0x1f9/0x2660 [ 29.953267] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.953835] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.954628] ? __pfx_lock_acquire+0x10/0x10 [ 29.955222] ? __pfx_mmap_region+0x10/0x10 [ 29.955812] ? security_mmap_addr+0x7d/0xa0 [ 29.956409] ? get_unmapped_area+0x1f5/0x3f0 [ 29.957018] do_mmap+0x854/0xf00 [ 29.957505] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.958059] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.958679] ksys_mmap_pgoff+0x3af/0x500 [ 29.959242] do_syscall_64+0x3f/0x90 [ 29.959776] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.960504] RIP: 0033:0x7f369922ed82 [ 29.961011] 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 [ 29.963372] RSP: 002b:00007ffe1908fa18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.964399] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f369922ed82 [ 29.965340] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3698668000 [ 29.966276] RBP: 00007f3698668000 R08: 0000000000000009 R09: 0000000000001000 [ 29.967211] R10: 0000000000000812 R11: 0000000000000206 R12: 000056408393fd90 [ 29.968155] R13: 00007ffe1908fa30 R14: 00007ffe1908fa60 R15: 00007ffe1908fdc0 [ 29.969102] [ 29.969426] [ 29.969662] Allocated by task 213: [ 29.970137] kasan_save_stack+0x22/0x50 [ 29.970702] kasan_set_track+0x25/0x30 [ 29.971251] __kasan_slab_alloc+0x59/0x70 [ 29.971831] kmem_cache_alloc+0x16b/0x370 [ 29.972407] vm_area_dup+0x20/0x160 [ 29.972909] __split_vma+0x170/0x950 [ 29.973428] split_vma+0xc6/0x110 [ 29.973916] mprotect_fixup+0x8d2/0xb30 [ 29.974473] do_mprotect_pkey+0x87e/0xd40 [ 29.975048] __x64_sys_mprotect+0x78/0xc0 [ 29.975628] do_syscall_64+0x3f/0x90 [ 29.976170] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.976887] [ 29.977127] Freed by task 213: [ 29.977562] kasan_save_stack+0x22/0x50 [ 29.978123] kasan_set_track+0x25/0x30 [ 29.978666] kasan_save_free_info+0x2b/0x50 [ 29.979257] __kasan_slab_free+0x10a/0x190 [ 29.979845] kmem_cache_free+0x10d/0x4d0 [ 29.980415] rcu_core+0x8c8/0x2860 [ 29.980906] __do_softirq+0x1b7/0x7d4 [ 29.981434] [ 29.981670] Last potentially related work creation: [ 29.982314] kasan_save_stack+0x22/0x50 [ 29.982869] __kasan_record_aux_stack+0x8e/0xa0 [ 29.983500] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.984228] remove_vma+0x139/0x170 [ 29.984728] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.985342] do_vmi_munmap+0x1f1/0x2b0 [ 29.985879] __vm_munmap+0x138/0x3a0 [ 29.986402] __x64_sys_munmap+0x59/0x80 [ 29.986953] do_syscall_64+0x3f/0x90 [ 29.987481] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.988202] [ 29.988443] The buggy address belongs to the object at ffff8880098809f8 [ 29.988443] which belongs to the cache vm_area_struct of size 168 [ 29.990078] The buggy address is located 88 bytes inside of [ 29.990078] freed 168-byte region [ffff8880098809f8, ffff888009880aa0) [ 29.991640] [ 29.991877] The buggy address belongs to the physical page: [ 29.992616] page:0000000036ea972c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9880 [ 29.993817] memcg:ffff888009881001 [ 29.994293] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.995011] page_type: 0xffffffff() [ 29.995508] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 29.996551] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009881001 [ 29.997552] page dumped because: kasan: bad access detected [ 29.998284] [ 29.998521] Memory state around the buggy address: [ 29.999169] ffff888009880900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.000116] ffff888009880980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 30.001080] >ffff888009880a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.002021] ^ [ 30.002786] ffff888009880a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 30.003711] ffff888009880b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.004642] ================================================================== [ 30.006107] Disabling lock debugging due to kernel taint [ 32.091242] BUG: Bad rss-counter state mm:00000000b32b1ada type:MM_FILEPAGES val:33 [ 32.092314] BUG: Bad rss-counter state mm:00000000b32b1ada type:MM_ANONPAGES val:22 [ 32.479133] BUG: Bad rss-counter state mm:000000006d819add type:MM_FILEPAGES val:33 [ 32.480577] BUG: Bad rss-counter state mm:000000006d819add type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:28646' (ECDSA) to the list of known hosts. 2023/06/21 06:43:29 fuzzer started 2023/06/21 06:43:29 dialing manager at localhost:36067 2023/06/21 06:43:29 checking machine... 2023/06/21 06:43:29 checking revisions... [ 33.196064] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:43:29 testing simple program... [ 33.240462] cgroup: Unknown subsys name 'net' [ 33.293949] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:43:29 Registers: info registers vcpu 0 RAX=0000000000000007 RBX=0000000000000000 RCX=0000000000000100 RDX=0000000000000000 RSI=ffffffff814c8467 RDI=ffff88800f4cba74 RBP=ffff88800f4cb680 RSP=ffff88806ce099c8 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=00007f47265a6fef R13=0000000000000000 R14=ffff88800f4cb680 R15=ffff88800dabad80 RIP=ffffffff8135bd96 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 00007f4725763700 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=00007f63a036b0b0 CR3=000000000d67c000 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=2038323a33343a3630203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038323a33343a3630203132 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff7fffffffffff RBX=0000000000000001 RCX=ffffffff815343f6 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffffffff81839db7 RSP=ffff88800f297be8 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff88807ffdc000 R13=0000000000000006 R14=0000000000000288 R15=ffffea0000396f00 RIP=ffffffff8180f079 RFL=00000012 [----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 00007f639fdb3900 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=00007f7209e76020 CR3=0000000016c22000 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=44f355641b15b2b7a84305f5e91b2185 XMM02=000000000011a428ec2efd57dc4c00df XMM03=00000000001219c893a56638b548b854 XMM04=93d9c459d36abf8300000000000ae988 XMM05=19e9129bd510f2350000000000131b10 XMM06=14287494f25a53360000000000130978 XMM07=e042d86d42eb936e0000000000121c48 XMM08=93a56638b548b854000000000011a488 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000