syzkaller login: [ 30.420743] BUG: Bad rss-counter state mm:0000000078ea002f type:MM_FILEPAGES val:33 [ 30.421645] BUG: Bad rss-counter state mm:0000000078ea002f type:MM_ANONPAGES val:22 [ 30.546839] ================================================================== [ 30.547467] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.548063] Read of size 8 at addr ffff88800d82f6b0 by task sshd/219 [ 30.548593] [ 30.548727] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.549267] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.549883] Call Trace: [ 30.550082] [ 30.550259] dump_stack_lvl+0x91/0xf0 [ 30.550580] print_report+0xcc/0x620 [ 30.550884] ? __virt_addr_valid+0x102/0x340 [ 30.551242] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.551804] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.552226] kasan_report+0xbe/0xf0 [ 30.552517] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.552886] vma_interval_tree_remove+0xc75/0xec0 [ 30.553253] vma_prepare+0xc54/0x11a0 [ 30.553565] __split_vma+0x5af/0x950 [ 30.553872] ? __pfx___split_vma+0x10/0x10 [ 30.554212] ? find_held_lock+0x2c/0x110 [ 30.554537] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.554875] ? lock_is_held_type+0x9f/0x120 [ 30.555227] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.555642] ? mtree_range_walk+0x632/0x900 [ 30.556004] ? mas_walk+0x5c7/0x7c0 [ 30.556358] do_vmi_munmap+0x1f1/0x2b0 [ 30.556690] mmap_region+0x1f9/0x2660 [ 30.556999] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.557333] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.557805] ? __pfx_lock_acquire+0x10/0x10 [ 30.558157] ? __pfx_mmap_region+0x10/0x10 [ 30.558505] ? security_mmap_addr+0x7d/0xa0 [ 30.558859] ? get_unmapped_area+0x1f5/0x3f0 [ 30.559232] do_mmap+0x854/0xf00 [ 30.559516] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.559844] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.560240] ksys_mmap_pgoff+0x3af/0x500 [ 30.560590] do_syscall_64+0x3f/0x90 [ 30.560901] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.561336] RIP: 0033:0x7f193f703d82 [ 30.561642] 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 [ 30.563091] RSP: 002b:00007ffe37db7e88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.563765] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f193f703d82 [ 30.564395] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f193eb3d000 [ 30.564965] RBP: 00007f193eb3d000 R08: 0000000000000009 R09: 0000000000001000 [ 30.565534] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561e45c78ec0 [ 30.566096] R13: 00007ffe37db7ea0 R14: 00007ffe37db7ed0 R15: 00007ffe37db8230 [ 30.566669] [ 30.566860] [ 30.567003] Allocated by task 212: [ 30.567289] kasan_save_stack+0x22/0x50 [ 30.567631] kasan_set_track+0x25/0x30 [ 30.567965] __kasan_slab_alloc+0x59/0x70 [ 30.568341] kmem_cache_alloc+0x16b/0x370 [ 30.568677] vm_area_dup+0x20/0x160 [ 30.568972] __split_vma+0x170/0x950 [ 30.569285] split_vma+0xc6/0x110 [ 30.569573] mprotect_fixup+0x8d2/0xb30 [ 30.569907] do_mprotect_pkey+0x87e/0xd40 [ 30.570248] __x64_sys_mprotect+0x78/0xc0 [ 30.570647] do_syscall_64+0x3f/0x90 [ 30.570956] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.571379] [ 30.571524] Freed by task 202: [ 30.571798] kasan_save_stack+0x22/0x50 [ 30.572138] kasan_set_track+0x25/0x30 [ 30.572500] kasan_save_free_info+0x2b/0x50 [ 30.572847] __kasan_slab_free+0x10a/0x190 [ 30.573198] kmem_cache_free+0x10d/0x4d0 [ 30.573530] rcu_core+0x8c8/0x2860 [ 30.573826] __do_softirq+0x1b7/0x7d4 [ 30.574152] [ 30.574297] Last potentially related work creation: [ 30.574694] kasan_save_stack+0x22/0x50 [ 30.575027] __kasan_record_aux_stack+0x8e/0xa0 [ 30.575420] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.575838] remove_vma+0x139/0x170 [ 30.576140] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.576559] do_vmi_munmap+0x1f1/0x2b0 [ 30.576893] __vm_munmap+0x138/0x3a0 [ 30.577202] __x64_sys_munmap+0x59/0x80 [ 30.577533] do_syscall_64+0x3f/0x90 [ 30.577847] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.578265] [ 30.578404] The buggy address belongs to the object at ffff88800d82f658 [ 30.578404] which belongs to the cache vm_area_struct of size 168 [ 30.579388] The buggy address is located 88 bytes inside of [ 30.579388] freed 168-byte region [ffff88800d82f658, ffff88800d82f700) [ 30.580349] [ 30.580491] The buggy address belongs to the physical page: [ 30.580944] page:000000009a8850f6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd82f [ 30.581688] memcg:ffff888017ee5101 [ 30.581962] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.582384] page_type: 0xffffffff() [ 30.582681] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.583316] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888017ee5101 [ 30.583928] page dumped because: kasan: bad access detected [ 30.584424] [ 30.584565] Memory state around the buggy address: [ 30.584957] ffff88800d82f580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.585541] ffff88800d82f600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.586109] >ffff88800d82f680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.586659] ^ [ 30.587026] ffff88800d82f700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.587569] ffff88800d82f780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.588130] ================================================================== [ 30.588950] Disabling lock debugging due to kernel taint [ 32.309631] BUG: Bad rss-counter state mm:0000000087901e7b type:MM_FILEPAGES val:33 [ 32.310345] BUG: Bad rss-counter state mm:0000000087901e7b type:MM_ANONPAGES val:22 [ 32.641531] BUG: Bad rss-counter state mm:0000000080332065 type:MM_FILEPAGES val:33 [ 32.642293] BUG: Bad rss-counter state mm:0000000080332065 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:12940' (ECDSA) to the list of known hosts. 2023/06/21 08:34:12 fuzzer started 2023/06/21 08:34:12 dialing manager at localhost:36067 2023/06/21 08:34:12 checking machine... 2023/06/21 08:34:12 checking revisions... [ 33.180432] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:34:12 testing simple program... [ 33.214138] cgroup: Unknown subsys name 'net' [ 33.260011] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:34:12 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff866212df RCX=ffffffff864bf101 RDX=1ffff1100d9c135a RSI=0000000000000000 RDI=ffffffff866212df RBP=ffffffff866212df RSP=ffff88806ce09a00 R8 =ffffffff864bf1b8 R9 =ffff88806ce09ab8 R10=ffffffff85d3d357 R11=00000000000b54e7 R12=ffff88806ce09b40 R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff88800e9a3e80 RIP=ffffffff81007b48 RFL=00000202 [-------] 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 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=00007f25cd737130 CR3=000000000c8ae000 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=c9b337ab107d87b8274d654e91b27f31 XMM02=ec2efd57dc4c00df000000000011acb8 XMM03=6c754d6d43540df9000000000011ad88 XMM04=478690e73854340700000000000ae988 XMM05=dfcdbad4f1609c370000000000131898 XMM06=2f9316d0747df6b80000000000130700 XMM07=e042d86d42eb936e0000000000121d50 XMM08=6c754d6d43540df9000000000011ad88 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88800f697d08 RCX=0000000000000000 RDX=1ffff11001ed2f95 RSI=ffffffff844c6e2f RDI=0000000000000007 RBP=ffff88800f697ca8 RSP=ffff88800f697ab0 R8 =0000000000000007 R9 =0000000000000002 R10=0000000000000000 R11=0000000000000000 R12=ffff88800e679e80 R13=ffffed1001ed2f9c R14=ffff88800f697ce1 R15=0000000000000000 RIP=ffffffff844c6e58 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 00007f1676be2900 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=00007f1676bc1020 CR3=000000000b976000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000