syzkaller login: [ 55.431739] BUG: Bad rss-counter state mm:00000000b338a33f type:MM_FILEPAGES val:32 [ 55.432572] BUG: Bad rss-counter state mm:00000000b338a33f type:MM_ANONPAGES val:22 [ 55.585855] ================================================================== [ 55.586480] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 55.588706] Read of size 8 at addr ffff88800dd12228 by task sshd/219 [ 55.589215] [ 55.589359] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 55.589906] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 55.590529] Call Trace: [ 55.590738] [ 55.590925] dump_stack_lvl+0x91/0xf0 [ 55.591245] print_report+0xcc/0x620 [ 55.591565] ? __virt_addr_valid+0x102/0x340 [ 55.591923] ? vma_interval_tree_remove+0xc75/0xec0 [ 55.592321] ? vma_interval_tree_remove+0xc75/0xec0 [ 55.592723] kasan_report+0xbe/0xf0 [ 55.593033] ? vma_interval_tree_remove+0xc75/0xec0 [ 55.594283] vma_interval_tree_remove+0xc75/0xec0 [ 55.594904] vma_prepare+0xc54/0x11a0 [ 55.595219] __split_vma+0x5af/0x950 [ 55.595530] ? __pfx___split_vma+0x10/0x10 [ 55.596046] ? find_held_lock+0x2c/0x110 [ 55.596390] do_vmi_align_munmap+0x2ba/0x11f0 [ 55.596890] ? lock_is_held_type+0x9f/0x120 [ 55.597357] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 55.597807] ? mtree_range_walk+0x632/0x900 [ 55.598178] ? mas_walk+0x5c7/0x7c0 [ 55.598488] do_vmi_munmap+0x1f1/0x2b0 [ 55.598978] mmap_region+0x1f9/0x2660 [ 55.599294] ? vm_mmap_pgoff+0x15c/0x3a0 [ 55.599736] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 55.600205] ? __pfx_lock_acquire+0x10/0x10 [ 55.600553] ? __pfx_mmap_region+0x10/0x10 [ 55.601066] ? security_mmap_addr+0x7d/0xa0 [ 55.601437] ? get_unmapped_area+0x1f5/0x3f0 [ 55.602001] do_mmap+0x854/0xf00 [ 55.602287] vm_mmap_pgoff+0x1a6/0x3a0 [ 55.602612] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 55.604031] ksys_mmap_pgoff+0x3af/0x500 [ 55.604362] do_syscall_64+0x3f/0x90 [ 55.604729] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 55.605145] RIP: 0033:0x7f23acbc8d82 [ 55.605479] 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 [ 55.607033] RSP: 002b:00007fff77631fd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 55.607657] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f23acbc8d82 [ 55.608204] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f23ac002000 [ 55.608791] RBP: 00007f23ac002000 R08: 0000000000000009 R09: 0000000000001000 [ 55.609354] R10: 0000000000000812 R11: 0000000000000206 R12: 000055946d13eb20 [ 55.609989] R13: 00007fff77631ff0 R14: 00007fff77632020 R15: 00007fff77632380 [ 55.610542] [ 55.610817] [ 55.610959] Allocated by task 212: [ 55.611238] kasan_save_stack+0x22/0x50 [ 55.611568] kasan_set_track+0x25/0x30 [ 55.611936] __kasan_slab_alloc+0x59/0x70 [ 55.612277] kmem_cache_alloc+0x16b/0x370 [ 55.612746] vm_area_dup+0x20/0x160 [ 55.613056] __split_vma+0x170/0x950 [ 55.613384] split_vma+0xc6/0x110 [ 55.613716] mprotect_fixup+0x8d2/0xb30 [ 55.614043] do_mprotect_pkey+0x87e/0xd40 [ 55.614382] __x64_sys_mprotect+0x78/0xc0 [ 55.614764] do_syscall_64+0x3f/0x90 [ 55.615076] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 55.615493] [ 55.615750] Freed by task 212: [ 55.616001] kasan_save_stack+0x22/0x50 [ 55.616319] kasan_set_track+0x25/0x30 [ 55.616767] kasan_save_free_info+0x2b/0x50 [ 55.617963] __kasan_slab_free+0x10a/0x190 [ 55.618309] kmem_cache_free+0x10d/0x4d0 [ 55.618685] rcu_core+0x8c8/0x2860 [ 55.618977] __do_softirq+0x1b7/0x7d4 [ 55.619290] [ 55.619432] Last potentially related work creation: [ 55.619856] kasan_save_stack+0x22/0x50 [ 55.620183] __kasan_record_aux_stack+0x8e/0xa0 [ 55.620553] __call_rcu_common.constprop.0+0x6a/0xb90 [ 55.621130] remove_vma+0x139/0x170 [ 55.621508] do_vmi_align_munmap+0xd4a/0x11f0 [ 55.621924] do_vmi_munmap+0x1f1/0x2b0 [ 55.622240] __vm_munmap+0x138/0x3a0 [ 55.622544] __x64_sys_munmap+0x59/0x80 [ 55.622915] do_syscall_64+0x3f/0x90 [ 55.623225] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 55.623688] [ 55.623831] Second to last potentially related work creation: [ 55.624270] kasan_save_stack+0x22/0x50 [ 55.624598] __kasan_record_aux_stack+0x8e/0xa0 [ 55.625092] __call_rcu_common.constprop.0+0x6a/0xb90 [ 55.625537] remove_vma+0x139/0x170 [ 55.625914] do_vmi_align_munmap+0xd4a/0x11f0 [ 55.626274] do_vmi_munmap+0x1f1/0x2b0 [ 55.626592] mmap_region+0x1f9/0x2660 [ 55.626950] do_mmap+0x854/0xf00 [ 55.627230] vm_mmap_pgoff+0x1a6/0x3a0 [ 55.627553] ksys_mmap_pgoff+0x3af/0x500 [ 55.627969] do_syscall_64+0x3f/0x90 [ 55.628279] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 55.628747] [ 55.628888] The buggy address belongs to the object at ffff88800dd121d0 [ 55.628888] which belongs to the cache vm_area_struct of size 168 [ 55.629869] The buggy address is located 88 bytes inside of [ 55.629869] freed 168-byte region [ffff88800dd121d0, ffff88800dd12278) [ 55.631343] [ 55.631482] The buggy address belongs to the physical page: [ 55.631939] page:0000000039909ad3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdd12 [ 55.632661] memcg:ffff88800ded8801 [ 55.632940] flags: 0x100000000000200(slab|node=0|zone=1) [ 55.637485] page_type: 0xffffffff() [ 55.637817] raw: 0100000000000200 ffff88800879fc80 ffffea0000378880 dead000000000004 [ 55.638384] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ded8801 [ 55.639057] page dumped because: kasan: bad access detected [ 55.639479] [ 55.639664] Memory state around the buggy address: [ 55.640042] ffff88800dd12100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 55.640588] ffff88800dd12180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 55.641233] >ffff88800dd12200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 55.641825] ^ [ 55.642184] ffff88800dd12280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 55.642780] ffff88800dd12300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 55.643323] ================================================================== [ 55.653370] Disabling lock debugging due to kernel taint [ 60.379391] BUG: Bad rss-counter state mm:0000000048577644 type:MM_FILEPAGES val:33 [ 60.380054] BUG: Bad rss-counter state mm:0000000048577644 type:MM_ANONPAGES val:22 [ 61.563544] BUG: Bad rss-counter state mm:00000000382ab606 type:MM_FILEPAGES val:33 [ 61.564211] BUG: Bad rss-counter state mm:00000000382ab606 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62417' (ECDSA) to the list of known hosts. 2023/06/20 08:06:28 fuzzer started 2023/06/20 08:06:28 dialing manager at localhost:44161 2023/06/20 08:06:28 checking machine... 2023/06/20 08:06:28 checking revisions... [ 62.589354] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:06:28 testing simple program... [ 62.663954] cgroup: Unknown subsys name 'net' [ 62.762367] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:06:04 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888016bf72c0 RCX=0000000000000002 RDX=0000000000000000 RSI=0000000000000000 RDI=ffffffff8560b640 RBP=0000000000000000 RSP=ffff888016bf72b0 R8 =0000000000000000 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff812d8e47 RFL=00000282 [--S----] 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 00007fa8e8062900 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=00007fa8e80626f8 CR3=0000000016dc8000 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=ff000000000000000000000000000000 XMM02=50454c45545f434c0053534552444441 XMM03=505f434c00534547415353454d5f434c XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff8453084b RDX=fffffbfff0ac3014 RSI=0000000000000004 RDI=ffffffff85618098 RBP=ffffffff85618098 RSP=ffff888008d87bb0 R8 =0000000000000000 R9 =fffffbfff0ac3013 R10=ffffffff8561809b R11=0000000000000000 R12=0000000000000003 R13=fffffbfff0ac3013 R14=0000000000000001 R15=1ffff110011b0f77 RIP=ffffffff845308c8 RFL=00000002 [-------] 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 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=00007f9237d72c90 CR3=000000000ca4e000 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=ff000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000000000 XMM04=c9fb0ef88a79f73200000000001366a0 XMM05=d3fdd5f48436fbd700000000000aead0 XMM06=e5d5b1f7e936f53d00000000000ae988 XMM07=a1fcdcf819d7e1e500000000000ae728 XMM08=44495f474f4c5359530069253d595449 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000