syzkaller login: [ 28.822425] BUG: Bad rss-counter state mm:000000005dc6a84e type:MM_FILEPAGES val:33 [ 28.823763] BUG: Bad rss-counter state mm:000000005dc6a84e type:MM_ANONPAGES val:22 [ 28.863274] ================================================================== [ 28.864370] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.865365] Read of size 8 at addr ffff88800fed25c8 by task sshd/220 [ 28.866188] [ 28.866425] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.867348] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.868413] Call Trace: [ 28.868758] [ 28.869066] dump_stack_lvl+0x91/0xf0 [ 28.869588] print_report+0xcc/0x620 [ 28.870114] ? __virt_addr_valid+0x102/0x340 [ 28.870713] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.871393] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.872056] kasan_report+0xbe/0xf0 [ 28.872571] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.873233] vma_interval_tree_remove+0xc75/0xec0 [ 28.873874] vma_prepare+0xc54/0x11a0 [ 28.874386] __split_vma+0x5af/0x950 [ 28.874895] ? __pfx___split_vma+0x10/0x10 [ 28.875474] ? find_held_lock+0x2c/0x110 [ 28.876031] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.876636] ? lock_is_held_type+0x9f/0x120 [ 28.877215] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.877866] ? mtree_range_walk+0x632/0x900 [ 28.878458] ? mas_walk+0x5c7/0x7c0 [ 28.878968] do_vmi_munmap+0x1f1/0x2b0 [ 28.879518] mmap_region+0x1f9/0x2660 [ 28.880039] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.880590] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.881359] ? __pfx_lock_acquire+0x10/0x10 [ 28.881923] ? __pfx_mmap_region+0x10/0x10 [ 28.882490] ? security_mmap_addr+0x7d/0xa0 [ 28.883061] ? get_unmapped_area+0x1f5/0x3f0 [ 28.883668] do_mmap+0x854/0xf00 [ 28.884139] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.884670] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.885272] ksys_mmap_pgoff+0x3af/0x500 [ 28.885813] do_syscall_64+0x3f/0x90 [ 28.886327] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.887022] RIP: 0033:0x7ff7ddec5d82 [ 28.887527] 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 [ 28.889831] RSP: 002b:00007ffc8ee823d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.890802] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff7ddec5d82 [ 28.891748] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff7dd2ff000 [ 28.892675] RBP: 00007ff7dd2ff000 R08: 0000000000000009 R09: 0000000000001000 [ 28.893579] R10: 0000000000000812 R11: 0000000000000206 R12: 000056173f4a7ec0 [ 28.894485] R13: 00007ffc8ee823f0 R14: 00007ffc8ee82420 R15: 00007ffc8ee82780 [ 28.895412] [ 28.895725] [ 28.895961] Allocated by task 213: [ 28.896426] kasan_save_stack+0x22/0x50 [ 28.896967] kasan_set_track+0x25/0x30 [ 28.897501] __kasan_slab_alloc+0x59/0x70 [ 28.898067] kmem_cache_alloc+0x16b/0x370 [ 28.898619] vm_area_dup+0x20/0x160 [ 28.899182] __split_vma+0x170/0x950 [ 28.899696] split_vma+0xc6/0x110 [ 28.900176] mprotect_fixup+0x8d2/0xb30 [ 28.900714] do_mprotect_pkey+0x87e/0xd40 [ 28.901275] __x64_sys_mprotect+0x78/0xc0 [ 28.901862] do_syscall_64+0x3f/0x90 [ 28.902390] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.903106] [ 28.903346] Freed by task 213: [ 28.903797] kasan_save_stack+0x22/0x50 [ 28.904356] kasan_set_track+0x25/0x30 [ 28.904904] kasan_save_free_info+0x2b/0x50 [ 28.905496] __kasan_slab_free+0x10a/0x190 [ 28.906081] kmem_cache_free+0x10d/0x4d0 [ 28.906620] rcu_core+0x8c8/0x2860 [ 28.907102] __do_softirq+0x1b7/0x7d4 [ 28.907643] [ 28.907876] Last potentially related work creation: [ 28.908505] kasan_save_stack+0x22/0x50 [ 28.909041] __kasan_record_aux_stack+0x8e/0xa0 [ 28.909675] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.910386] remove_vma+0x139/0x170 [ 28.910890] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.911508] do_vmi_munmap+0x1f1/0x2b0 [ 28.912047] __vm_munmap+0x138/0x3a0 [ 28.912566] __x64_sys_munmap+0x59/0x80 [ 28.913116] do_syscall_64+0x3f/0x90 [ 28.913643] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.914360] [ 28.914599] The buggy address belongs to the object at ffff88800fed2570 [ 28.914599] which belongs to the cache vm_area_struct of size 168 [ 28.916232] The buggy address is located 88 bytes inside of [ 28.916232] freed 168-byte region [ffff88800fed2570, ffff88800fed2618) [ 28.917802] [ 28.918043] The buggy address belongs to the physical page: [ 28.918775] page:000000005ff39fbe refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfed2 [ 28.919999] memcg:ffff888014762101 [ 28.920476] flags: 0x100000000000200(slab|node=0|zone=1) [ 28.921188] page_type: 0xffffffff() [ 28.921687] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 28.922710] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888014762101 [ 28.923731] page dumped because: kasan: bad access detected [ 28.924470] [ 28.924705] Memory state around the buggy address: [ 28.925346] ffff88800fed2480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 28.926289] ffff88800fed2500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 28.927239] >ffff88800fed2580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.928202] ^ [ 28.928941] ffff88800fed2600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 28.929895] ffff88800fed2680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.930848] ================================================================== [ 28.932048] Disabling lock debugging due to kernel taint [ 30.906846] BUG: Bad rss-counter state mm:00000000b3462a74 type:MM_FILEPAGES val:33 [ 30.907849] BUG: Bad rss-counter state mm:00000000b3462a74 type:MM_ANONPAGES val:22 [ 31.404966] BUG: Bad rss-counter state mm:000000005d760930 type:MM_FILEPAGES val:33 [ 31.406129] BUG: Bad rss-counter state mm:000000005d760930 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:50028' (ECDSA) to the list of known hosts. 2023/06/20 23:10:51 fuzzer started 2023/06/20 23:10:52 dialing manager at localhost:36067 2023/06/20 23:10:52 checking machine... 2023/06/20 23:10:52 checking revisions... [ 32.124074] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:10:52 testing simple program... [ 32.176553] cgroup: Unknown subsys name 'net' [ 32.230561] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:10:51 Registers: info registers vcpu 0 RAX=fffffbfff0ba7a6a RBX=fffffbfff0ba7a6b RCX=ffffffff812d86ea RDX=fffffbfff0ba7a6b RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=fffffbfff0ba7a6a RSP=ffff88806ce09940 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffffffff8560b640 R13=ffffffff814c8575 R14=ffffffff85652d08 R15=ffff888019d278d0 RIP=ffffffff8180f189 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 00007fa1e65f1700 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=00007ff4568580b0 CR3=0000000018ce4000 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=2031353a30313a3332203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031353a30313a3332203032 XMM08=20303d64696720303d64697520612f6e XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007f5161d4c038 CR3=000000000c6f0000 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=9e09d96e87aecd8c8a421787e123de97 XMM02=0000000000119f38ec2efd57dc4c00df XMM03=0000000000121bb833a3aa373d5bef99 XMM04=ae495f9a7aa2f27700000000000ae988 XMM05=19e9129bd510f23500000000001319f0 XMM06=643991a8fe80910a0000000000130858 XMM07=e042d86d42eb936e0000000000121e38 XMM08=33a3aa373d5bef990000000000119f98 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000