syzkaller login: [ 28.662677] BUG: Bad rss-counter state mm:000000000ac4bad3 type:MM_FILEPAGES val:33 [ 28.663681] BUG: Bad rss-counter state mm:000000000ac4bad3 type:MM_ANONPAGES val:22 [ 28.824842] ================================================================== [ 28.825738] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.826666] Read of size 8 at addr ffff88800e0846b0 by task sshd/221 [ 28.827425] [ 28.827640] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.828557] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.829514] Call Trace: [ 28.829827] [ 28.830117] dump_stack_lvl+0x91/0xf0 [ 28.830618] print_report+0xcc/0x620 [ 28.831095] ? __virt_addr_valid+0x102/0x340 [ 28.831638] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.832257] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.832865] kasan_report+0xbe/0xf0 [ 28.833336] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.833945] vma_interval_tree_remove+0xc75/0xec0 [ 28.834535] vma_prepare+0xc54/0x11a0 [ 28.835034] __split_vma+0x5af/0x950 [ 28.835502] ? __pfx___split_vma+0x10/0x10 [ 28.836026] ? find_held_lock+0x2c/0x110 [ 28.836541] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.837102] ? lock_is_held_type+0x9f/0x120 [ 28.837635] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.838228] ? mtree_range_walk+0x632/0x900 [ 28.838784] ? mas_walk+0x5c7/0x7c0 [ 28.839265] do_vmi_munmap+0x1f1/0x2b0 [ 28.839765] mmap_region+0x1f9/0x2660 [ 28.840252] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.840768] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.841485] ? __pfx_lock_acquire+0x10/0x10 [ 28.842014] ? __pfx_mmap_region+0x10/0x10 [ 28.842561] ? security_mmap_addr+0x7d/0xa0 [ 28.843099] ? get_unmapped_area+0x1f5/0x3f0 [ 28.843660] do_mmap+0x854/0xf00 [ 28.844105] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.844601] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.845166] ksys_mmap_pgoff+0x3af/0x500 [ 28.845678] do_syscall_64+0x3f/0x90 [ 28.846158] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.846833] RIP: 0033:0x7f699133fd82 [ 28.847294] 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 [ 28.849399] RSP: 002b:00007ffd4d4dd3e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.850303] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f699133fd82 [ 28.851166] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6990779000 [ 28.852001] RBP: 00007f6990779000 R08: 0000000000000009 R09: 0000000000001000 [ 28.852842] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564318037ec0 [ 28.853684] R13: 00007ffd4d4dd400 R14: 00007ffd4d4dd430 R15: 00007ffd4d4dd790 [ 28.854531] [ 28.854849] [ 28.855066] Allocated by task 214: [ 28.855496] kasan_save_stack+0x22/0x50 [ 28.856000] kasan_set_track+0x25/0x30 [ 28.856488] __kasan_slab_alloc+0x59/0x70 [ 28.857007] kmem_cache_alloc+0x16b/0x370 [ 28.857520] vm_area_dup+0x20/0x160 [ 28.857979] __split_vma+0x170/0x950 [ 28.858447] split_vma+0xc6/0x110 [ 28.858901] mprotect_fixup+0x8d2/0xb30 [ 28.859405] do_mprotect_pkey+0x87e/0xd40 [ 28.859924] __x64_sys_mprotect+0x78/0xc0 [ 28.860444] do_syscall_64+0x3f/0x90 [ 28.860918] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.861568] [ 28.861788] Freed by task 211: [ 28.862188] kasan_save_stack+0x22/0x50 [ 28.862696] kasan_set_track+0x25/0x30 [ 28.863196] kasan_save_free_info+0x2b/0x50 [ 28.863724] __kasan_slab_free+0x10a/0x190 [ 28.864270] kmem_cache_free+0x10d/0x4d0 [ 28.864785] rcu_core+0x8c8/0x2860 [ 28.865228] __do_softirq+0x1b7/0x7d4 [ 28.865703] [ 28.865919] Last potentially related work creation: [ 28.866515] kasan_save_stack+0x22/0x50 [ 28.867032] __kasan_record_aux_stack+0x8e/0xa0 [ 28.867609] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.868253] remove_vma+0x139/0x170 [ 28.868709] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.869273] do_vmi_munmap+0x1f1/0x2b0 [ 28.869761] __vm_munmap+0x138/0x3a0 [ 28.870231] __x64_sys_munmap+0x59/0x80 [ 28.870732] do_syscall_64+0x3f/0x90 [ 28.871213] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.871864] [ 28.872081] The buggy address belongs to the object at ffff88800e084658 [ 28.872081] which belongs to the cache vm_area_struct of size 168 [ 28.873559] The buggy address is located 88 bytes inside of [ 28.873559] freed 168-byte region [ffff88800e084658, ffff88800e084700) [ 28.874995] [ 28.875213] The buggy address belongs to the physical page: [ 28.875871] page:0000000055f6cb45 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe084 [ 28.876951] memcg:ffff88800ee2d401 [ 28.877385] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 28.878114] page_type: 0xffffffff() [ 28.878600] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 28.879552] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ee2d401 [ 28.880502] page dumped because: kasan: bad access detected [ 28.881185] [ 28.881411] Memory state around the buggy address: [ 28.882009] ffff88800e084580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.882905] ffff88800e084600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 28.883797] >ffff88800e084680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.884679] ^ [ 28.885282] ffff88800e084700: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 [ 28.886167] ffff88800e084780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 28.887078] ================================================================== [ 28.888149] Disabling lock debugging due to kernel taint [ 30.771770] BUG: Bad rss-counter state mm:000000002ce1b6ea type:MM_FILEPAGES val:33 [ 30.772745] BUG: Bad rss-counter state mm:000000002ce1b6ea type:MM_ANONPAGES val:22 [ 31.342460] BUG: Bad rss-counter state mm:000000002112feb3 type:MM_FILEPAGES val:33 [ 31.343626] BUG: Bad rss-counter state mm:000000002112feb3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:9355' (ECDSA) to the list of known hosts. 2023/06/21 01:06:05 fuzzer started 2023/06/21 01:06:06 dialing manager at localhost:36067 2023/06/21 01:06:06 checking machine... 2023/06/21 01:06:06 checking revisions... [ 31.946631] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:06:06 testing simple program... [ 32.000179] cgroup: Unknown subsys name 'net' [ 32.051607] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:06:05 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88801a807c80 RCX=ffff8880087c9500 RDX=ffffea00006a01c0 RSI=ffff8880197f2000 RDI=ffff8880087c9500 RBP=0000000000000000 RSP=ffff88800f007918 R8 =ffff88801a807dc0 R9 =0000000000000000 R10=ffffea000065fc80 R11=00000000800c0000 R12=dffffc0000000000 R13=ffff88800f007958 R14=ffff8880087c9500 R15=ffff8880197f2000 RIP=ffffffff81810316 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 00007f1d4e23e700 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=00007f3751076ff0 CR3=00000000099fa000 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=2035303a36303a3130203132206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035303a36303a3130203132 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff11001c1a85f RBX=ffff88800e0d42c8 RCX=ffffffff812e0135 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800e0d42f8 RBP=ffff888019342eb0 RSP=ffff88806cf09dd8 R8 =0000000000000001 R9 =ffffed100d9e13af R10=0000000000000003 R11=00000000000b6d53 R12=dffffc0000000000 R13=ffff888019343780 R14=ffffffff813782f8 R15=ffff888013e01200 RIP=ffffffff818464e2 RFL=00000046 [---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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f464c3b4900 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=00007f464c379008 CR3=000000000ffda000 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