syzkaller login: [ 30.683825] BUG: Bad rss-counter state mm:000000009904715b type:MM_FILEPAGES val:33 [ 30.684859] BUG: Bad rss-counter state mm:000000009904715b type:MM_ANONPAGES val:22 [ 30.851875] ================================================================== [ 30.852803] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.853772] Read of size 8 at addr ffff88800fe89b38 by task sshd/220 [ 30.854649] [ 30.854875] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.855789] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.856799] Call Trace: [ 30.857169] [ 30.857473] dump_stack_lvl+0x91/0xf0 [ 30.857969] print_report+0xcc/0x620 [ 30.858470] ? __virt_addr_valid+0x102/0x340 [ 30.859074] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.859715] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.860339] kasan_report+0xbe/0xf0 [ 30.860818] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.861451] vma_interval_tree_remove+0xc75/0xec0 [ 30.862066] vma_prepare+0xc54/0x11a0 [ 30.862543] __split_vma+0x5af/0x950 [ 30.863048] ? __pfx___split_vma+0x10/0x10 [ 30.863595] ? find_held_lock+0x2c/0x110 [ 30.864129] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.864705] ? lock_is_held_type+0x9f/0x120 [ 30.865255] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.865853] ? mtree_range_walk+0x632/0x900 [ 30.866426] ? mas_walk+0x5c7/0x7c0 [ 30.866901] do_vmi_munmap+0x1f1/0x2b0 [ 30.867441] mmap_region+0x1f9/0x2660 [ 30.867920] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.868439] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.869165] ? __pfx_lock_acquire+0x10/0x10 [ 30.869694] ? __pfx_mmap_region+0x10/0x10 [ 30.870232] ? security_mmap_addr+0x7d/0xa0 [ 30.870755] ? get_unmapped_area+0x1f5/0x3f0 [ 30.871328] do_mmap+0x854/0xf00 [ 30.871782] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.872300] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.872855] ksys_mmap_pgoff+0x3af/0x500 [ 30.873411] do_syscall_64+0x3f/0x90 [ 30.873958] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.874845] RIP: 0033:0x7f5cc67ccd82 [ 30.875387] 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 [ 30.877519] RSP: 002b:00007fff07d0f5d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.878453] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5cc67ccd82 [ 30.879305] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5cc5c06000 [ 30.880186] RBP: 00007f5cc5c06000 R08: 0000000000000009 R09: 0000000000001000 [ 30.881045] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ce33e9ad90 [ 30.881877] R13: 00007fff07d0f5f0 R14: 00007fff07d0f620 R15: 00007fff07d0f980 [ 30.882766] [ 30.883082] [ 30.883296] Allocated by task 213: [ 30.883730] kasan_save_stack+0x22/0x50 [ 30.884258] kasan_set_track+0x25/0x30 [ 30.884752] __kasan_slab_alloc+0x59/0x70 [ 30.885285] kmem_cache_alloc+0x16b/0x370 [ 30.885795] vm_area_dup+0x20/0x160 [ 30.886275] __split_vma+0x170/0x950 [ 30.886743] split_vma+0xc6/0x110 [ 30.887191] mprotect_fixup+0x8d2/0xb30 [ 30.887713] do_mprotect_pkey+0x87e/0xd40 [ 30.888245] __x64_sys_mprotect+0x78/0xc0 [ 30.888772] do_syscall_64+0x3f/0x90 [ 30.889260] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.889891] [ 30.890131] Freed by task 213: [ 30.890521] kasan_save_stack+0x22/0x50 [ 30.891038] kasan_set_track+0x25/0x30 [ 30.891544] kasan_save_free_info+0x2b/0x50 [ 30.892104] __kasan_slab_free+0x10a/0x190 [ 30.892645] kmem_cache_free+0x10d/0x4d0 [ 30.893167] rcu_core+0x8c8/0x2860 [ 30.893609] __do_softirq+0x1b7/0x7d4 [ 30.894120] [ 30.894342] Last potentially related work creation: [ 30.894916] kasan_save_stack+0x22/0x50 [ 30.895483] __kasan_record_aux_stack+0x8e/0xa0 [ 30.896097] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.896764] remove_vma+0x139/0x170 [ 30.897247] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.897819] do_vmi_munmap+0x1f1/0x2b0 [ 30.898356] __vm_munmap+0x138/0x3a0 [ 30.898845] __x64_sys_munmap+0x59/0x80 [ 30.899388] do_syscall_64+0x3f/0x90 [ 30.899884] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.900556] [ 30.900776] The buggy address belongs to the object at ffff88800fe89ae0 [ 30.900776] which belongs to the cache vm_area_struct of size 168 [ 30.902335] The buggy address is located 88 bytes inside of [ 30.902335] freed 168-byte region [ffff88800fe89ae0, ffff88800fe89b88) [ 30.903837] [ 30.904077] The buggy address belongs to the physical page: [ 30.904760] page:000000003d62c233 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfe89 [ 30.905890] memcg:ffff888016549f01 [ 30.906366] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.907047] page_type: 0xffffffff() [ 30.907535] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.908500] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016549f01 [ 30.909459] page dumped because: kasan: bad access detected [ 30.910158] [ 30.910377] Memory state around the buggy address: [ 30.910993] ffff88800fe89a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.911925] ffff88800fe89a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 30.912829] >ffff88800fe89b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.913732] ^ [ 30.914384] ffff88800fe89b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.915303] ffff88800fe89c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.916229] ================================================================== [ 30.917348] Disabling lock debugging due to kernel taint [ 32.881735] BUG: Bad rss-counter state mm:000000009c25407a type:MM_FILEPAGES val:33 [ 32.883271] BUG: Bad rss-counter state mm:000000009c25407a type:MM_ANONPAGES val:22 [ 33.431593] BUG: Bad rss-counter state mm:00000000eb9642db type:MM_FILEPAGES val:33 [ 33.432814] BUG: Bad rss-counter state mm:00000000eb9642db type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:6814' (ECDSA) to the list of known hosts. 2023/06/20 11:34:56 fuzzer started 2023/06/20 11:34:56 dialing manager at localhost:36067 2023/06/20 11:34:56 checking machine... 2023/06/20 11:34:56 checking revisions... [ 34.052499] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:34:56 testing simple program... [ 34.109859] cgroup: Unknown subsys name 'net' [ 34.165180] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:34:56 Registers: info registers vcpu 0 RAX=00000000000000e5 RBX=ffff88800e3cd808 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000000 RBP=ffffffff81803033 RSP=ffff88800fc1f758 R8 =0000000000000400 R9 =0000000000000000 R10=ffffed1001c79b00 R11=00000000000b6a61 R12=ffff88800e3cd800 R13=ffff888008441c80 R14=ffffffff81803033 R15=ffff888016946f60 RIP=ffffffff8180c700 RFL=00000216 [----AP-] 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 00007fc78e83a900 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=00007fc78edef650 CR3=000000000d8e8000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=0000000000000003 RCX=ffffffff813782c0 RDX=fffffbfff0ba7a6b RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=0000000000000004 RSP=ffff888008e37d48 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000128 R12=dffffc0000000000 R13=ffff888008e37dc8 R14=0000000000000001 R15=ffff88800e198280 RIP=ffffffff813782c8 RFL=00000247 [---Z-PC] 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 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=00007f2528772320 CR3=0000000009760000 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=2035353a34333a3131203032206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035353a34333a3131203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000