syzkaller login: [ 31.000185] BUG: Bad rss-counter state mm:000000005929f67f type:MM_FILEPAGES val:33 [ 31.001359] BUG: Bad rss-counter state mm:000000005929f67f type:MM_ANONPAGES val:22 [ 31.164976] ================================================================== [ 31.166053] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.167294] Read of size 8 at addr ffff888018f81ed8 by task sshd/220 [ 31.168211] [ 31.168475] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.169520] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.170660] Call Trace: [ 31.171039] <TASK> [ 31.171381] dump_stack_lvl+0x91/0xf0 [ 31.171964] print_report+0xcc/0x620 [ 31.172569] ? __virt_addr_valid+0x102/0x340 [ 31.173195] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.173826] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.174454] kasan_report+0xbe/0xf0 [ 31.174932] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.175554] vma_interval_tree_remove+0xc75/0xec0 [ 31.176165] vma_prepare+0xc54/0x11a0 [ 31.176644] __split_vma+0x5af/0x950 [ 31.177124] ? __pfx___split_vma+0x10/0x10 [ 31.177651] ? find_held_lock+0x2c/0x110 [ 31.178181] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.178752] ? lock_is_held_type+0x9f/0x120 [ 31.179290] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.179918] ? mtree_range_walk+0x632/0x900 [ 31.180484] ? mas_walk+0x5c7/0x7c0 [ 31.180961] do_vmi_munmap+0x1f1/0x2b0 [ 31.181452] mmap_region+0x1f9/0x2660 [ 31.181940] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.182448] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.183157] ? __pfx_lock_acquire+0x10/0x10 [ 31.183687] ? __pfx_mmap_region+0x10/0x10 [ 31.184240] ? security_mmap_addr+0x7d/0xa0 [ 31.184776] ? get_unmapped_area+0x1f5/0x3f0 [ 31.185322] do_mmap+0x854/0xf00 [ 31.185757] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.186257] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.186824] ksys_mmap_pgoff+0x3af/0x500 [ 31.187333] do_syscall_64+0x3f/0x90 [ 31.187810] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.188465] RIP: 0033:0x7fd239d02d82 [ 31.188919] 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 [ 31.191062] RSP: 002b:00007fff572812f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.191969] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd239d02d82 [ 31.192854] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd23913c000 [ 31.193716] RBP: 00007fd23913c000 R08: 0000000000000009 R09: 0000000000001000 [ 31.194568] R10: 0000000000000812 R11: 0000000000000206 R12: 000055928eeb6f70 [ 31.195445] R13: 00007fff57281310 R14: 00007fff57281340 R15: 00007fff572816a0 [ 31.196336] </TASK> [ 31.196635] [ 31.196856] Allocated by task 213: [ 31.197294] kasan_save_stack+0x22/0x50 [ 31.197804] kasan_set_track+0x25/0x30 [ 31.198307] __kasan_slab_alloc+0x59/0x70 [ 31.198834] kmem_cache_alloc+0x16b/0x370 [ 31.199353] vm_area_dup+0x20/0x160 [ 31.199803] __split_vma+0x170/0x950 [ 31.200270] split_vma+0xc6/0x110 [ 31.200713] mprotect_fixup+0x8d2/0xb30 [ 31.201227] do_mprotect_pkey+0x87e/0xd40 [ 31.201755] __x64_sys_mprotect+0x78/0xc0 [ 31.202271] do_syscall_64+0x3f/0x90 [ 31.202743] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.203392] [ 31.203615] Freed by task 213: [ 31.204010] kasan_save_stack+0x22/0x50 [ 31.204521] kasan_set_track+0x25/0x30 [ 31.205011] kasan_save_free_info+0x2b/0x50 [ 31.205562] __kasan_slab_free+0x10a/0x190 [ 31.206087] kmem_cache_free+0x10d/0x4d0 [ 31.206592] rcu_core+0x8c8/0x2860 [ 31.207035] __do_softirq+0x1b7/0x7d4 [ 31.207517] [ 31.207735] Last potentially related work creation: [ 31.208347] kasan_save_stack+0x22/0x50 [ 31.208850] __kasan_record_aux_stack+0x8e/0xa0 [ 31.209423] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.210062] remove_vma+0x139/0x170 [ 31.210517] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.211078] do_vmi_munmap+0x1f1/0x2b0 [ 31.211571] __vm_munmap+0x138/0x3a0 [ 31.212038] __x64_sys_munmap+0x59/0x80 [ 31.212543] do_syscall_64+0x3f/0x90 [ 31.213017] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.213667] [ 31.213880] Second to last potentially related work creation: [ 31.214573] kasan_save_stack+0x22/0x50 [ 31.215085] __kasan_record_aux_stack+0x8e/0xa0 [ 31.215656] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.216314] remove_vma+0x139/0x170 [ 31.216766] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.217324] do_vmi_munmap+0x1f1/0x2b0 [ 31.217816] mmap_region+0x1f9/0x2660 [ 31.218298] do_mmap+0x854/0xf00 [ 31.218735] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.219219] ksys_mmap_pgoff+0x3af/0x500 [ 31.219730] do_syscall_64+0x3f/0x90 [ 31.220221] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.220871] [ 31.221085] The buggy address belongs to the object at ffff888018f81e80 [ 31.221085] which belongs to the cache vm_area_struct of size 168 [ 31.222553] The buggy address is located 88 bytes inside of [ 31.222553] freed 168-byte region [ffff888018f81e80, ffff888018f81f28) [ 31.223963] [ 31.224187] The buggy address belongs to the physical page: [ 31.224852] page:000000001fbff31f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18f81 [ 31.225951] memcg:ffff888018ee3801 [ 31.226376] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.227081] page_type: 0xffffffff() [ 31.227532] raw: 0100000000000200 ffff8880087a0c80 ffffea00003b8c00 dead000000000007 [ 31.228473] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018ee3801 [ 31.229378] page dumped because: kasan: bad access detected [ 31.230035] [ 31.230253] Memory state around the buggy address: [ 31.230840] ffff888018f81d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.231693] ffff888018f81e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 31.232547] >ffff888018f81e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.233389] ^ [ 31.234116] ffff888018f81f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 31.234963] ffff888018f81f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.235818] ================================================================== [ 31.236811] Disabling lock debugging due to kernel taint [ 33.172941] BUG: Bad rss-counter state mm:000000008577ebc5 type:MM_FILEPAGES val:33 [ 33.173927] BUG: Bad rss-counter state mm:000000008577ebc5 type:MM_ANONPAGES val:22 [ 33.737774] BUG: Bad rss-counter state mm:00000000adeb051e type:MM_FILEPAGES val:33 [ 33.738952] BUG: Bad rss-counter state mm:00000000adeb051e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:33999' (ECDSA) to the list of known hosts. 2023/06/20 15:45:45 fuzzer started 2023/06/20 15:45:45 dialing manager at localhost:36067 2023/06/20 15:45:45 checking machine... 2023/06/20 15:45:45 checking revisions... [ 34.340042] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:45:45 testing simple program... [ 34.386687] cgroup: Unknown subsys name 'net' [ 34.423613] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:45:44 Registers: info registers vcpu 0 RAX=ffffffff83861243 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff110031acf37 RSI=ffff888018d67d60 RDI=ffffffff83861243 RBP=ffff888018d679f8 RSP=ffff888018d67960 R8 =0000000000000001 R9 =ffff888018d679a0 R10=0000000000038001 R11=000000000008b06b R12=ffff888018d67a28 R13=0000000000000000 R14=ffff8880164db680 R15=0000000000000001 RIP=ffffffff810bd06d 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 00007f2dcd057900 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=00007f2dcd60e618 CR3=0000000017ea8000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 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=00007f677f7f2360 CR3=000000000fe52000 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=2034343a35343a3531203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034343a35343a3531203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000