syzkaller login: [ 31.526777] BUG: Bad rss-counter state mm:0000000006208b4a type:MM_FILEPAGES val:33 [ 31.528023] BUG: Bad rss-counter state mm:0000000006208b4a type:MM_ANONPAGES val:22 [ 31.577038] ================================================================== [ 31.578005] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.579034] Read of size 8 at addr ffff88800e54fed8 by task sshd/220 [ 31.579862] [ 31.580093] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.581022] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.582158] Call Trace: [ 31.582519] [ 31.582832] dump_stack_lvl+0x91/0xf0 [ 31.583366] print_report+0xcc/0x620 [ 31.583882] ? __virt_addr_valid+0x102/0x340 [ 31.584489] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.585144] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.585816] kasan_report+0xbe/0xf0 [ 31.586527] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.587216] vma_interval_tree_remove+0xc75/0xec0 [ 31.587893] vma_prepare+0xc54/0x11a0 [ 31.588436] __split_vma+0x5af/0x950 [ 31.588957] ? __pfx___split_vma+0x10/0x10 [ 31.589545] ? find_held_lock+0x2c/0x110 [ 31.590131] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.590759] ? lock_is_held_type+0x9f/0x120 [ 31.591392] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.592065] ? mtree_range_walk+0x632/0x900 [ 31.592684] ? mas_walk+0x5c7/0x7c0 [ 31.593236] do_vmi_munmap+0x1f1/0x2b0 [ 31.593792] mmap_region+0x1f9/0x2660 [ 31.594340] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.594934] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.595735] ? __pfx_lock_acquire+0x10/0x10 [ 31.596338] ? __pfx_mmap_region+0x10/0x10 [ 31.596937] ? security_mmap_addr+0x7d/0xa0 [ 31.597536] ? get_unmapped_area+0x1f5/0x3f0 [ 31.598151] do_mmap+0x854/0xf00 [ 31.598654] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.599210] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.599842] ksys_mmap_pgoff+0x3af/0x500 [ 31.600423] do_syscall_64+0x3f/0x90 [ 31.600953] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.601696] RIP: 0033:0x7f2017cadd82 [ 31.602204] 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 [ 31.604585] RSP: 002b:00007ffcf0111358 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.605598] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2017cadd82 [ 31.606563] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f20170e7000 [ 31.607521] RBP: 00007f20170e7000 R08: 0000000000000009 R09: 0000000000001000 [ 31.608469] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556183456ec0 [ 31.609418] R13: 00007ffcf0111370 R14: 00007ffcf01113a0 R15: 00007ffcf0111700 [ 31.610382] [ 31.610708] [ 31.610966] Allocated by task 213: [ 31.611467] kasan_save_stack+0x22/0x50 [ 31.612027] kasan_set_track+0x25/0x30 [ 31.612584] __kasan_slab_alloc+0x59/0x70 [ 31.613164] kmem_cache_alloc+0x16b/0x370 [ 31.613748] vm_area_dup+0x20/0x160 [ 31.614248] __split_vma+0x170/0x950 [ 31.614771] split_vma+0xc6/0x110 [ 31.615274] mprotect_fixup+0x8d2/0xb30 [ 31.615841] do_mprotect_pkey+0x87e/0xd40 [ 31.616456] __x64_sys_mprotect+0x78/0xc0 [ 31.617027] do_syscall_64+0x3f/0x90 [ 31.617554] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.618258] [ 31.618506] Freed by task 213: [ 31.618949] kasan_save_stack+0x22/0x50 [ 31.619512] kasan_set_track+0x25/0x30 [ 31.620054] kasan_save_free_info+0x2b/0x50 [ 31.620649] __kasan_slab_free+0x10a/0x190 [ 31.621240] kmem_cache_free+0x10d/0x4d0 [ 31.621819] rcu_core+0x8c8/0x2860 [ 31.622323] __do_softirq+0x1b7/0x7d4 [ 31.622876] [ 31.623117] Last potentially related work creation: [ 31.623765] kasan_save_stack+0x22/0x50 [ 31.624331] __kasan_record_aux_stack+0x8e/0xa0 [ 31.624960] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.625686] remove_vma+0x139/0x170 [ 31.626187] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.626846] do_vmi_munmap+0x1f1/0x2b0 [ 31.627403] __vm_munmap+0x138/0x3a0 [ 31.627919] __x64_sys_munmap+0x59/0x80 [ 31.628484] do_syscall_64+0x3f/0x90 [ 31.629010] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.629725] [ 31.629966] Second to last potentially related work creation: [ 31.630733] kasan_save_stack+0x22/0x50 [ 31.631315] __kasan_record_aux_stack+0x8e/0xa0 [ 31.631970] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.632684] remove_vma+0x139/0x170 [ 31.633182] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.633809] do_vmi_munmap+0x1f1/0x2b0 [ 31.634367] mmap_region+0x1f9/0x2660 [ 31.634918] do_mmap+0x854/0xf00 [ 31.635407] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.635951] ksys_mmap_pgoff+0x3af/0x500 [ 31.636526] do_syscall_64+0x3f/0x90 [ 31.637052] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.637770] [ 31.638011] The buggy address belongs to the object at ffff88800e54fe80 [ 31.638011] which belongs to the cache vm_area_struct of size 168 [ 31.639664] The buggy address is located 88 bytes inside of [ 31.639664] freed 168-byte region [ffff88800e54fe80, ffff88800e54ff28) [ 31.641228] [ 31.641497] The buggy address belongs to the physical page: [ 31.642228] page:00000000a6a1cb03 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe54f [ 31.643476] memcg:ffff88800d88ed01 [ 31.643948] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.644675] page_type: 0xffffffff() [ 31.645157] raw: 0100000000000200 ffff88800879fc80 ffffea000039da40 dead000000000002 [ 31.646155] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d88ed01 [ 31.647158] page dumped because: kasan: bad access detected [ 31.647874] [ 31.648106] Memory state around the buggy address: [ 31.648730] ffff88800e54fd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.649643] ffff88800e54fe00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.650563] >ffff88800e54fe80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.651506] ^ [ 31.652276] ffff88800e54ff00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 31.653207] ffff88800e54ff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.654162] ================================================================== [ 31.655411] Disabling lock debugging due to kernel taint [ 33.579779] BUG: Bad rss-counter state mm:00000000779337fb type:MM_FILEPAGES val:33 [ 33.580809] BUG: Bad rss-counter state mm:00000000779337fb type:MM_ANONPAGES val:22 [ 34.050397] BUG: Bad rss-counter state mm:00000000ee577d48 type:MM_FILEPAGES val:33 [ 34.051147] BUG: Bad rss-counter state mm:00000000ee577d48 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:42745' (ECDSA) to the list of known hosts. 2023/06/20 07:31:15 fuzzer started 2023/06/20 07:31:16 dialing manager at localhost:44161 2023/06/20 07:31:16 checking machine... 2023/06/20 07:31:16 checking revisions... [ 34.761603] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:31:16 testing simple program... [ 34.808911] cgroup: Unknown subsys name 'net' [ 34.864660] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:31:15 Registers: info registers vcpu 0 RAX=000055836417b490 RBX=00000000649155c3 RCX=0000000000000001 RDX=000055836417b490 RSI=000055836417b498 RDI=0000000000000000 RBP=00007fc6b832d65c RSP=00007fc6b832d5f0 R8 =00007fc6b832d6a0 R9 =0000000000000001 R10=0000000000000001 R11=00007fc6b832d8b0 R12=00007fc6b8881430 R13=0000000000001fa0 R14=0000000000000000 R15=0000000000000000 RIP=00007fc6b877f09d RFL=00000246 [---Z-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 00007fc6b8331700 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=00007ffecc8bbb48 CR3=000000000e456000 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=000000000007f13f00000000649155c3 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3932325b646873732035313a3133 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383734 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff8880147f8000 RCX=1ffff11001f96fcf RDX=1ffff110028ff296 RSI=ffffffff811fc5b3 RDI=ffff8880147f94b0 RBP=ffff8880147f8000 RSP=ffff88800fcb7eb0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=ffff88800fcb7f58 R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff81834dcf 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 00007febb784c900 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=00007ffda9f8f000 CR3=000000000c762000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000