syzkaller login: [ 30.886172] BUG: Bad rss-counter state mm:000000008015ab31 type:MM_FILEPAGES val:33 [ 30.887577] BUG: Bad rss-counter state mm:000000008015ab31 type:MM_ANONPAGES val:22 [ 31.051318] ================================================================== [ 31.052260] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.053214] Read of size 8 at addr ffff88800e7eba50 by task sshd/220 [ 31.054125] [ 31.054358] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.055271] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.056277] Call Trace: [ 31.056618] [ 31.056919] dump_stack_lvl+0x91/0xf0 [ 31.057430] print_report+0xcc/0x620 [ 31.057931] ? __virt_addr_valid+0x102/0x340 [ 31.058487] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.059132] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.059767] kasan_report+0xbe/0xf0 [ 31.060249] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.060914] vma_interval_tree_remove+0xc75/0xec0 [ 31.061553] vma_prepare+0xc54/0x11a0 [ 31.062055] __split_vma+0x5af/0x950 [ 31.062531] ? __pfx___split_vma+0x10/0x10 [ 31.063084] ? find_held_lock+0x2c/0x110 [ 31.063606] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.064194] ? lock_is_held_type+0x9f/0x120 [ 31.064754] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.065393] ? mtree_range_walk+0x632/0x900 [ 31.065962] ? mas_walk+0x5c7/0x7c0 [ 31.066443] do_vmi_munmap+0x1f1/0x2b0 [ 31.066965] mmap_region+0x1f9/0x2660 [ 31.067448] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.067985] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.068697] ? __pfx_lock_acquire+0x10/0x10 [ 31.069257] ? __pfx_mmap_region+0x10/0x10 [ 31.069809] ? security_mmap_addr+0x7d/0xa0 [ 31.070356] ? get_unmapped_area+0x1f5/0x3f0 [ 31.070926] do_mmap+0x854/0xf00 [ 31.071378] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.071896] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.072458] ksys_mmap_pgoff+0x3af/0x500 [ 31.073007] do_syscall_64+0x3f/0x90 [ 31.073488] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.074162] RIP: 0033:0x7f0485c37d82 [ 31.074624] 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 [ 31.076810] RSP: 002b:00007fff8cec6788 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.077750] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0485c37d82 [ 31.078602] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0485071000 [ 31.079477] RBP: 00007f0485071000 R08: 0000000000000009 R09: 0000000000001000 [ 31.080340] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560091eefec0 [ 31.081230] R13: 00007fff8cec67a0 R14: 00007fff8cec67d0 R15: 00007fff8cec6b30 [ 31.082097] [ 31.082390] [ 31.082607] Allocated by task 213: [ 31.083064] kasan_save_stack+0x22/0x50 [ 31.083569] kasan_set_track+0x25/0x30 [ 31.084097] __kasan_slab_alloc+0x59/0x70 [ 31.084622] kmem_cache_alloc+0x16b/0x370 [ 31.085178] vm_area_dup+0x20/0x160 [ 31.085636] __split_vma+0x170/0x950 [ 31.086122] split_vma+0xc6/0x110 [ 31.086564] mprotect_fixup+0x8d2/0xb30 [ 31.087097] do_mprotect_pkey+0x87e/0xd40 [ 31.087615] __x64_sys_mprotect+0x78/0xc0 [ 31.088166] do_syscall_64+0x3f/0x90 [ 31.088648] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.089330] [ 31.089547] Freed by task 213: [ 31.089961] kasan_save_stack+0x22/0x50 [ 31.090465] kasan_set_track+0x25/0x30 [ 31.090991] kasan_save_free_info+0x2b/0x50 [ 31.091527] __kasan_slab_free+0x10a/0x190 [ 31.092085] kmem_cache_free+0x10d/0x4d0 [ 31.092597] rcu_core+0x8c8/0x2860 [ 31.093080] __do_softirq+0x1b7/0x7d4 [ 31.093556] [ 31.093786] Last potentially related work creation: [ 31.094374] kasan_save_stack+0x22/0x50 [ 31.094903] __kasan_record_aux_stack+0x8e/0xa0 [ 31.095490] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.096149] remove_vma+0x139/0x170 [ 31.096599] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.097201] do_vmi_munmap+0x1f1/0x2b0 [ 31.097691] __vm_munmap+0x138/0x3a0 [ 31.098179] __x64_sys_munmap+0x59/0x80 [ 31.098683] do_syscall_64+0x3f/0x90 [ 31.099193] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.099856] [ 31.100077] Second to last potentially related work creation: [ 31.100772] kasan_save_stack+0x22/0x50 [ 31.101292] __kasan_record_aux_stack+0x8e/0xa0 [ 31.101884] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.102526] remove_vma+0x139/0x170 [ 31.103006] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.103567] do_vmi_munmap+0x1f1/0x2b0 [ 31.104078] mmap_region+0x1f9/0x2660 [ 31.104560] do_mmap+0x854/0xf00 [ 31.105031] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.105525] ksys_mmap_pgoff+0x3af/0x500 [ 31.106045] do_syscall_64+0x3f/0x90 [ 31.106518] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.107188] [ 31.107407] The buggy address belongs to the object at ffff88800e7eb9f8 [ 31.107407] which belongs to the cache vm_area_struct of size 168 [ 31.108902] The buggy address is located 88 bytes inside of [ 31.108902] freed 168-byte region [ffff88800e7eb9f8, ffff88800e7ebaa0) [ 31.110335] [ 31.110553] The buggy address belongs to the physical page: [ 31.111245] page:0000000004567f63 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe7eb [ 31.112358] memcg:ffff88800e55ef01 [ 31.112797] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.113471] page_type: 0xffffffff() [ 31.113938] raw: 0100000000000200 ffff8880087a0c80 ffffea00003dab40 dead000000000004 [ 31.114888] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e55ef01 [ 31.115817] page dumped because: kasan: bad access detected [ 31.116490] [ 31.116711] Memory state around the buggy address: [ 31.117329] ffff88800e7eb900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.118214] ffff88800e7eb980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 31.119109] >ffff88800e7eba00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.119980] ^ [ 31.120726] ffff88800e7eba80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 31.121613] ffff88800e7ebb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.122501] ================================================================== [ 31.123627] Disabling lock debugging due to kernel taint [ 33.035324] BUG: Bad rss-counter state mm:00000000b2cf6818 type:MM_FILEPAGES val:33 [ 33.036614] BUG: Bad rss-counter state mm:00000000b2cf6818 type:MM_ANONPAGES val:22 [ 33.502927] BUG: Bad rss-counter state mm:000000002deb2a97 type:MM_FILEPAGES val:33 [ 33.503913] BUG: Bad rss-counter state mm:000000002deb2a97 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:42468' (ECDSA) to the list of known hosts. 2023/06/20 21:25:33 fuzzer started 2023/06/20 21:25:33 dialing manager at localhost:36067 2023/06/20 21:25:33 checking machine... 2023/06/20 21:25:33 checking revisions... [ 34.219690] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:25:33 testing simple program... [ 34.268100] cgroup: Unknown subsys name 'net' [ 34.307834] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:25:33 Registers: info registers vcpu 0 RAX=0000000000000003 RBX=0000000000000001 RCX=ffffffff83635bd6 RDX=000000000002635c RSI=000000000002635b RDI=ffffffff86582760 RBP=ffff8880102ff600 RSP=ffff8880102ff538 R8 =0000000000000000 R9 =ffff8880102ff5e8 R10=0000000000038001 R11=000000000008a835 R12=ffff8880102ff608 R13=ffff8880102ff5f0 R14=ffff8880102ff5e9 R15=ffff8880102ff5a8 RIP=ffffffff811307f4 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 00007fb1050ec700 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=00007f3f6f44b0b0 CR3=00000000145e2000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3932325b646873732033333a3532 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363033 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 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=00007f7e3178bb60 CR3=000000000c97e000 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=01be0d17b6ed038d8b4a85ac86480494 XMM02=ec2efd57dc4c00df000000000011b3f0 XMM03=438611fce80136ab000000000011b4c0 XMM04=97faad6a7e1c18f200000000000ae988 XMM05=319b4f1fc41374c00000000000134428 XMM06=4fda316b135da52b00000000001334c8 XMM07=e042d86d42eb936e0000000000122730 XMM08=438611fce80136ab000000000011b4c0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000