syzkaller login: [ 35.293735] BUG: Bad rss-counter state mm:00000000750d3c4c type:MM_FILEPAGES val:33 [ 35.296053] BUG: Bad rss-counter state mm:00000000750d3c4c type:MM_ANONPAGES val:22 [ 35.469183] ================================================================== [ 35.470245] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.471368] Read of size 8 at addr ffff88800b859140 by task sshd/220 [ 35.472404] [ 35.472655] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.473667] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.474833] Call Trace: [ 35.475137] [ 35.475409] dump_stack_lvl+0x91/0xf0 [ 35.475872] print_report+0xcc/0x620 [ 35.476335] ? __virt_addr_valid+0x102/0x340 [ 35.476857] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.477443] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.478021] kasan_report+0xbe/0xf0 [ 35.478479] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.479080] vma_interval_tree_remove+0xc75/0xec0 [ 35.479663] vma_prepare+0xc54/0x11a0 [ 35.480138] __split_vma+0x5af/0x950 [ 35.480598] ? __pfx___split_vma+0x10/0x10 [ 35.481114] ? find_held_lock+0x2c/0x110 [ 35.481632] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.482192] ? lock_is_held_type+0x9f/0x120 [ 35.482729] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.483316] ? mtree_range_walk+0x632/0x900 [ 35.483846] ? mas_walk+0x5c7/0x7c0 [ 35.484313] do_vmi_munmap+0x1f1/0x2b0 [ 35.484809] mmap_region+0x1f9/0x2660 [ 35.485284] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.485783] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.486486] ? __pfx_lock_acquire+0x10/0x10 [ 35.487008] ? __pfx_mmap_region+0x10/0x10 [ 35.487527] ? security_mmap_addr+0x7d/0xa0 [ 35.488040] ? get_unmapped_area+0x1f5/0x3f0 [ 35.488583] do_mmap+0x854/0xf00 [ 35.489007] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.489493] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.490038] ksys_mmap_pgoff+0x3af/0x500 [ 35.490548] do_syscall_64+0x3f/0x90 [ 35.491019] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.491643] RIP: 0033:0x7f784c189d82 [ 35.492087] 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 [ 35.494157] RSP: 002b:00007fff908776d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.495056] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f784c189d82 [ 35.495860] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f784b5c3000 [ 35.496690] RBP: 00007f784b5c3000 R08: 0000000000000009 R09: 0000000000001000 [ 35.497528] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c530f6eec0 [ 35.498355] R13: 00007fff908776f0 R14: 00007fff90877720 R15: 00007fff90877a80 [ 35.499214] [ 35.499503] [ 35.499710] Allocated by task 213: [ 35.500132] kasan_save_stack+0x22/0x50 [ 35.500631] kasan_set_track+0x25/0x30 [ 35.501108] __kasan_slab_alloc+0x59/0x70 [ 35.501613] kmem_cache_alloc+0x16b/0x370 [ 35.502126] vm_area_dup+0x20/0x160 [ 35.502584] __split_vma+0x170/0x950 [ 35.503043] split_vma+0xc6/0x110 [ 35.503478] mprotect_fixup+0x8d2/0xb30 [ 35.503968] do_mprotect_pkey+0x87e/0xd40 [ 35.504477] __x64_sys_mprotect+0x78/0xc0 [ 35.505006] do_syscall_64+0x3f/0x90 [ 35.505472] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.506097] [ 35.506310] Freed by task 213: [ 35.506706] kasan_save_stack+0x22/0x50 [ 35.507200] kasan_set_track+0x25/0x30 [ 35.507674] kasan_save_free_info+0x2b/0x50 [ 35.508203] __kasan_slab_free+0x10a/0x190 [ 35.508721] kmem_cache_free+0x10d/0x4d0 [ 35.509228] rcu_core+0x8c8/0x2860 [ 35.509661] __do_softirq+0x1b7/0x7d4 [ 35.510135] [ 35.510346] Last potentially related work creation: [ 35.510912] kasan_save_stack+0x22/0x50 [ 35.511392] __kasan_record_aux_stack+0x8e/0xa0 [ 35.511932] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.512537] remove_vma+0x139/0x170 [ 35.513000] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.513530] do_vmi_munmap+0x1f1/0x2b0 [ 35.513994] __vm_munmap+0x138/0x3a0 [ 35.514445] __x64_sys_munmap+0x59/0x80 [ 35.514913] do_syscall_64+0x3f/0x90 [ 35.515358] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.515959] [ 35.516164] The buggy address belongs to the object at ffff88800b8590e8 [ 35.516164] which belongs to the cache vm_area_struct of size 168 [ 35.517535] The buggy address is located 88 bytes inside of [ 35.517535] freed 168-byte region [ffff88800b8590e8, ffff88800b859190) [ 35.518847] [ 35.519053] The buggy address belongs to the physical page: [ 35.519668] page:000000006a4876c3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xb859 [ 35.520684] memcg:ffff88800fc11d01 [ 35.521083] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.521689] page_type: 0xffffffff() [ 35.522115] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 35.522998] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fc11d01 [ 35.523865] page dumped because: kasan: bad access detected [ 35.524498] [ 35.524702] Memory state around the buggy address: [ 35.525250] ffff88800b859000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.526063] ffff88800b859080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 35.526888] >ffff88800b859100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.527719] ^ [ 35.528332] ffff88800b859180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 35.529158] ffff88800b859200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 35.529985] ================================================================== [ 35.530899] Disabling lock debugging due to kernel taint [ 38.067574] BUG: Bad rss-counter state mm:000000007d0d71ce type:MM_FILEPAGES val:33 [ 38.068812] BUG: Bad rss-counter state mm:000000007d0d71ce type:MM_ANONPAGES val:22 [ 38.474642] BUG: Bad rss-counter state mm:00000000ef298658 type:MM_FILEPAGES val:33 [ 38.476055] BUG: Bad rss-counter state mm:00000000ef298658 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:25592' (ECDSA) to the list of known hosts. 2023/06/19 17:56:13 fuzzer started 2023/06/19 17:56:14 dialing manager at localhost:44161 2023/06/19 17:56:14 checking machine... 2023/06/19 17:56:14 checking revisions... [ 39.223566] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:56:14 testing simple program... [ 39.275249] cgroup: Unknown subsys name 'net' [ 39.327203] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:56:08 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff856529e0 RCX=0000000000000100 RDX=1ffffffff0aca551 RSI=ffffffff814c842f RDI=0000000000000005 RBP=0000000000000000 RSP=ffff88806ce09a28 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b5420 R12=ffffffff86605df9 R13=0000000000000000 R14=ffffffff85652a88 R15=ffff88800d6a7a00 RIP=ffffffff814c844b 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 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=00007ffce1bb6368 CR3=000000000e62a000 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=2033313a36353a3731203931206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033313a36353a3731203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=1ffff1100d9e1329 RCX=ffffffff812d8ec3 RDX=0000000000000001 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=0000000000000000 RSP=ffff88806cf09938 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff812d8ed0 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 00007f49f666a900 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=00007f49f6c220b0 CR3=000000000eebc000 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=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