syzkaller login: [ 38.795092] BUG: Bad rss-counter state mm:000000007ddfe96a type:MM_FILEPAGES val:33 [ 38.796522] BUG: Bad rss-counter state mm:000000007ddfe96a type:MM_ANONPAGES val:22 [ 38.961803] ================================================================== [ 38.962708] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.963660] Read of size 8 at addr ffff88800ded5140 by task sshd/220 [ 38.964431] [ 38.964744] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.965606] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.966577] Call Trace: [ 38.966912] [ 38.967193] dump_stack_lvl+0x91/0xf0 [ 38.967699] print_report+0xcc/0x620 [ 38.968193] ? __virt_addr_valid+0x102/0x340 [ 38.968749] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.969363] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.969976] kasan_report+0xbe/0xf0 [ 38.970459] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.971088] vma_interval_tree_remove+0xc75/0xec0 [ 38.971701] vma_prepare+0xc54/0x11a0 [ 38.972178] __split_vma+0x5af/0x950 [ 38.972646] ? __pfx___split_vma+0x10/0x10 [ 38.973175] ? find_held_lock+0x2c/0x110 [ 38.973692] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.974254] ? lock_is_held_type+0x9f/0x120 [ 38.974788] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.975408] ? mtree_range_walk+0x632/0x900 [ 38.975957] ? mas_walk+0x5c7/0x7c0 [ 38.976435] do_vmi_munmap+0x1f1/0x2b0 [ 38.976921] mmap_region+0x1f9/0x2660 [ 38.977410] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.977922] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.978631] ? __pfx_lock_acquire+0x10/0x10 [ 38.979160] ? __pfx_mmap_region+0x10/0x10 [ 38.979719] ? security_mmap_addr+0x7d/0xa0 [ 38.980248] ? get_unmapped_area+0x1f5/0x3f0 [ 38.980797] do_mmap+0x854/0xf00 [ 38.981235] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.981731] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.982288] ksys_mmap_pgoff+0x3af/0x500 [ 38.982792] do_syscall_64+0x3f/0x90 [ 38.983276] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.983932] RIP: 0033:0x7f1bb1a59d82 [ 38.984389] 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 [ 38.986495] RSP: 002b:00007fff33d66ac8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.987409] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1bb1a59d82 [ 38.988253] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1bb0e93000 [ 38.989091] RBP: 00007f1bb0e93000 R08: 0000000000000009 R09: 0000000000001000 [ 38.989940] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f713662f60 [ 38.990776] R13: 00007fff33d66ae0 R14: 00007fff33d66b10 R15: 00007fff33d66e70 [ 38.991649] [ 38.991942] [ 38.992160] Allocated by task 213: [ 38.992589] kasan_save_stack+0x22/0x50 [ 38.993095] kasan_set_track+0x25/0x30 [ 38.993597] __kasan_slab_alloc+0x59/0x70 [ 38.994120] kmem_cache_alloc+0x16b/0x370 [ 38.994641] vm_area_dup+0x20/0x160 [ 38.995093] __split_vma+0x170/0x950 [ 38.995569] split_vma+0xc6/0x110 [ 38.996014] mprotect_fixup+0x8d2/0xb30 [ 38.996506] do_mprotect_pkey+0x87e/0xd40 [ 38.997028] __x64_sys_mprotect+0x78/0xc0 [ 38.997550] do_syscall_64+0x3f/0x90 [ 38.998029] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.998677] [ 38.998892] Freed by task 213: [ 38.999283] kasan_save_stack+0x22/0x50 [ 38.999804] kasan_set_track+0x25/0x30 [ 39.000303] kasan_save_free_info+0x2b/0x50 [ 39.000838] __kasan_slab_free+0x10a/0x190 [ 39.001369] kmem_cache_free+0x10d/0x4d0 [ 39.001880] rcu_core+0x8c8/0x2860 [ 39.002327] __do_softirq+0x1b7/0x7d4 [ 39.002807] [ 39.003019] Last potentially related work creation: [ 39.003602] kasan_save_stack+0x22/0x50 [ 39.004103] __kasan_record_aux_stack+0x8e/0xa0 [ 39.004677] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.005317] remove_vma+0x139/0x170 [ 39.005769] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.006323] do_vmi_munmap+0x1f1/0x2b0 [ 39.006813] __vm_munmap+0x138/0x3a0 [ 39.007277] __x64_sys_munmap+0x59/0x80 [ 39.007780] do_syscall_64+0x3f/0x90 [ 39.008262] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.008907] [ 39.009121] The buggy address belongs to the object at ffff88800ded50e8 [ 39.009121] which belongs to the cache vm_area_struct of size 168 [ 39.010603] The buggy address is located 88 bytes inside of [ 39.010603] freed 168-byte region [ffff88800ded50e8, ffff88800ded5190) [ 39.012017] [ 39.012237] The buggy address belongs to the physical page: [ 39.012892] page:0000000023d7a4b9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xded5 [ 39.013961] memcg:ffff88800ebff801 [ 39.014390] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.015030] page_type: 0xffffffff() [ 39.015494] raw: 0100000000000200 ffff8880087a0c80 ffffea00003d8dc0 dead000000000006 [ 39.016404] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ebff801 [ 39.017306] page dumped because: kasan: bad access detected [ 39.017956] [ 39.018176] Memory state around the buggy address: [ 39.018752] ffff88800ded5000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.019617] ffff88800ded5080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 39.020484] >ffff88800ded5100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.021347] ^ [ 39.021994] ffff88800ded5180: fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 [ 39.022845] ffff88800ded5200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 39.023712] ================================================================== [ 39.024685] Disabling lock debugging due to kernel taint [ 40.901874] BUG: Bad rss-counter state mm:0000000071c3405c type:MM_FILEPAGES val:33 [ 40.902805] BUG: Bad rss-counter state mm:0000000071c3405c type:MM_ANONPAGES val:22 [ 41.366298] BUG: Bad rss-counter state mm:00000000617704d1 type:MM_FILEPAGES val:33 [ 41.367463] BUG: Bad rss-counter state mm:00000000617704d1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:43739' (ECDSA) to the list of known hosts. 2023/06/20 17:29:35 fuzzer started 2023/06/20 17:29:36 dialing manager at localhost:36067 2023/06/20 17:29:36 checking machine... 2023/06/20 17:29:36 checking revisions... [ 42.091845] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:29:36 testing simple program... [ 42.126925] cgroup: Unknown subsys name 'net' [ 42.168132] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:29:35 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff860d8256 RDX=1ffff11001fa1f24 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff88800fd0f930 RSP=ffff88800fd0f868 R8 =ffffffff860d825a R9 =ffff88800fd0f918 R10=0000000000038001 R11=0000000000010b8d R12=ffff88800fd0f938 R13=ffff88800fd0f920 R14=0000000000000005 R15=ffff88800fd0f8d8 RIP=ffffffff81130b54 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 00007fbc0bac4900 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=00007fbc0c07c0b0 CR3=000000000fd76000 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=00007fff24a25478 CR3=0000000016f1e000 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=2035333a39323a3731203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035333a39323a3731203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000