syzkaller login: [ 31.512397] BUG: Bad rss-counter state mm:000000006a6fa12e type:MM_FILEPAGES val:33 [ 31.513604] BUG: Bad rss-counter state mm:000000006a6fa12e type:MM_ANONPAGES val:22 [ 31.550858] ================================================================== [ 31.551857] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.552798] Read of size 8 at addr ffff88800e0c1b38 by task sshd/220 [ 31.553687] [ 31.553907] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.554773] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.555761] Call Trace: [ 31.556079] [ 31.556363] dump_stack_lvl+0x91/0xf0 [ 31.556877] print_report+0xcc/0x620 [ 31.557360] ? __virt_addr_valid+0x102/0x340 [ 31.557915] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.558532] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.559163] kasan_report+0xbe/0xf0 [ 31.559640] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.560263] vma_interval_tree_remove+0xc75/0xec0 [ 31.560870] vma_prepare+0xc54/0x11a0 [ 31.561350] __split_vma+0x5af/0x950 [ 31.561824] ? __pfx___split_vma+0x10/0x10 [ 31.562352] ? find_held_lock+0x2c/0x110 [ 31.562868] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.563437] ? lock_is_held_type+0x9f/0x120 [ 31.563978] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.564582] ? mtree_range_walk+0x632/0x900 [ 31.565146] ? mas_walk+0x5c7/0x7c0 [ 31.565621] do_vmi_munmap+0x1f1/0x2b0 [ 31.566108] mmap_region+0x1f9/0x2660 [ 31.566586] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.567100] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.567823] ? __pfx_lock_acquire+0x10/0x10 [ 31.568353] ? __pfx_mmap_region+0x10/0x10 [ 31.568893] ? security_mmap_addr+0x7d/0xa0 [ 31.569431] ? get_unmapped_area+0x1f5/0x3f0 [ 31.569990] do_mmap+0x854/0xf00 [ 31.570437] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.570936] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.571504] ksys_mmap_pgoff+0x3af/0x500 [ 31.572014] do_syscall_64+0x3f/0x90 [ 31.572501] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.573156] RIP: 0033:0x7f9ee60ded82 [ 31.573622] 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 [ 31.575766] RSP: 002b:00007ffc96cc38a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.576690] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9ee60ded82 [ 31.577531] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9ee5518000 [ 31.578366] RBP: 00007f9ee5518000 R08: 0000000000000009 R09: 0000000000001000 [ 31.579215] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a0f40d6ec0 [ 31.580053] R13: 00007ffc96cc38c0 R14: 00007ffc96cc38f0 R15: 00007ffc96cc3c50 [ 31.580913] [ 31.581203] [ 31.581415] Allocated by task 212: [ 31.581842] kasan_save_stack+0x22/0x50 [ 31.582340] kasan_set_track+0x25/0x30 [ 31.582830] __kasan_slab_alloc+0x59/0x70 [ 31.583351] kmem_cache_alloc+0x16b/0x370 [ 31.583868] vm_area_dup+0x20/0x160 [ 31.584323] __split_vma+0x170/0x950 [ 31.584803] split_vma+0xc6/0x110 [ 31.585245] mprotect_fixup+0x8d2/0xb30 [ 31.585744] do_mprotect_pkey+0x87e/0xd40 [ 31.586261] __x64_sys_mprotect+0x78/0xc0 [ 31.586780] do_syscall_64+0x3f/0x90 [ 31.587251] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.587896] [ 31.588109] Freed by task 212: [ 31.588501] kasan_save_stack+0x22/0x50 [ 31.589024] kasan_set_track+0x25/0x30 [ 31.589512] kasan_save_free_info+0x2b/0x50 [ 31.590042] __kasan_slab_free+0x10a/0x190 [ 31.590576] kmem_cache_free+0x10d/0x4d0 [ 31.591080] rcu_core+0x8c8/0x2860 [ 31.591527] __do_softirq+0x1b7/0x7d4 [ 31.592000] [ 31.592217] Last potentially related work creation: [ 31.592804] kasan_save_stack+0x22/0x50 [ 31.593312] __kasan_record_aux_stack+0x8e/0xa0 [ 31.593884] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.594523] remove_vma+0x139/0x170 [ 31.594977] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.595527] do_vmi_munmap+0x1f1/0x2b0 [ 31.596012] __vm_munmap+0x138/0x3a0 [ 31.596472] __x64_sys_munmap+0x59/0x80 [ 31.596972] do_syscall_64+0x3f/0x90 [ 31.597445] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.598095] [ 31.598308] The buggy address belongs to the object at ffff88800e0c1ae0 [ 31.598308] which belongs to the cache vm_area_struct of size 168 [ 31.599776] The buggy address is located 88 bytes inside of [ 31.599776] freed 168-byte region [ffff88800e0c1ae0, ffff88800e0c1b88) [ 31.601189] [ 31.601402] The buggy address belongs to the physical page: [ 31.602055] page:00000000be185b08 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe0c1 [ 31.603132] memcg:ffff88801a0b7401 [ 31.603553] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.604199] page_type: 0xffffffff() [ 31.604656] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.605571] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a0b7401 [ 31.606475] page dumped because: kasan: bad access detected [ 31.607129] [ 31.607343] Memory state around the buggy address: [ 31.607940] ffff88800e0c1a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.608795] ffff88800e0c1a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 31.609637] >ffff88800e0c1b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.610485] ^ [ 31.611097] ffff88800e0c1b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 31.611959] ffff88800e0c1c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.612823] ================================================================== [ 31.613878] Disabling lock debugging due to kernel taint [ 34.267674] BUG: Bad rss-counter state mm:00000000346430b1 type:MM_FILEPAGES val:33 [ 34.268680] BUG: Bad rss-counter state mm:00000000346430b1 type:MM_ANONPAGES val:22 [ 34.798071] BUG: Bad rss-counter state mm:00000000ec8e7e4d type:MM_FILEPAGES val:33 [ 34.799151] BUG: Bad rss-counter state mm:00000000ec8e7e4d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:49903' (ECDSA) to the list of known hosts. 2023/06/20 16:21:24 fuzzer started 2023/06/20 16:21:25 dialing manager at localhost:36067 2023/06/20 16:21:25 checking machine... 2023/06/20 16:21:25 checking revisions... [ 35.503991] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:21:25 testing simple program... [ 35.546587] cgroup: Unknown subsys name 'net' [ 35.600573] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:21:24 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007f53b9e29c88 CR3=000000000ddf0000 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=2034323a31323a3631203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034323a31323a3631203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff888014347880 RCX=ffff888014348000 RDX=1ffff11002868efd RSI=0000000000000001 RDI=ffff888014347798 RBP=ffff88800b93b680 RSP=ffff888014347798 R8 =0000000000000000 R9 =0000000000000000 R10=ffff8880143477e8 R11=00000000000b6a61 R12=ffff888014347808 R13=ffff888014347810 R14=ffff888014347830 R15=ffff8880143477e8 RIP=ffffffff81132f33 RFL=00000212 [----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 00007fde04f0c900 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=00007ffe06b1f000 CR3=00000000159ac000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000