syzkaller login: [ 30.069682] BUG: Bad rss-counter state mm:0000000040f52804 type:MM_FILEPAGES val:33 [ 30.071001] BUG: Bad rss-counter state mm:0000000040f52804 type:MM_ANONPAGES val:22 [ 30.246829] ================================================================== [ 30.247959] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.249275] Read of size 8 at addr ffff8880094c35c8 by task sshd/220 [ 30.250217] [ 30.250460] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.251411] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.252460] Call Trace: [ 30.252805] [ 30.253111] dump_stack_lvl+0x91/0xf0 [ 30.253660] print_report+0xcc/0x620 [ 30.254181] ? __virt_addr_valid+0x102/0x340 [ 30.254776] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.255456] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.256158] kasan_report+0xbe/0xf0 [ 30.256702] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.257418] vma_interval_tree_remove+0xc75/0xec0 [ 30.258113] vma_prepare+0xc54/0x11a0 [ 30.258661] __split_vma+0x5af/0x950 [ 30.259209] ? __pfx___split_vma+0x10/0x10 [ 30.259813] ? find_held_lock+0x2c/0x110 [ 30.260412] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.261062] ? lock_is_held_type+0x9f/0x120 [ 30.261696] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.262385] ? mtree_range_walk+0x632/0x900 [ 30.262997] ? mas_walk+0x5c7/0x7c0 [ 30.263534] do_vmi_munmap+0x1f1/0x2b0 [ 30.264084] mmap_region+0x1f9/0x2660 [ 30.264624] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.265206] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.266022] ? __pfx_lock_acquire+0x10/0x10 [ 30.266621] ? __pfx_mmap_region+0x10/0x10 [ 30.267219] ? security_mmap_addr+0x7d/0xa0 [ 30.267822] ? get_unmapped_area+0x1f5/0x3f0 [ 30.268448] do_mmap+0x854/0xf00 [ 30.268945] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.269512] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.270142] ksys_mmap_pgoff+0x3af/0x500 [ 30.270719] do_syscall_64+0x3f/0x90 [ 30.271254] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.271979] RIP: 0033:0x7f4a1ddc0d82 [ 30.272495] 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 [ 30.274873] RSP: 002b:00007ffe58842928 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.275878] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4a1ddc0d82 [ 30.276825] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4a1d1fa000 [ 30.277785] RBP: 00007f4a1d1fa000 R08: 0000000000000009 R09: 0000000000001000 [ 30.278738] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bb26ea0f70 [ 30.279686] R13: 00007ffe58842940 R14: 00007ffe58842970 R15: 00007ffe58842cd0 [ 30.280644] [ 30.280972] [ 30.281216] Allocated by task 213: [ 30.281690] kasan_save_stack+0x22/0x50 [ 30.282262] kasan_set_track+0x25/0x30 [ 30.282808] __kasan_slab_alloc+0x59/0x70 [ 30.283397] kmem_cache_alloc+0x16b/0x370 [ 30.283968] vm_area_dup+0x20/0x160 [ 30.284480] __split_vma+0x170/0x950 [ 30.285001] split_vma+0xc6/0x110 [ 30.285512] mprotect_fixup+0x8d2/0xb30 [ 30.286070] do_mprotect_pkey+0x87e/0xd40 [ 30.286651] __x64_sys_mprotect+0x78/0xc0 [ 30.287229] do_syscall_64+0x3f/0x90 [ 30.287751] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.288466] [ 30.288703] Freed by task 213: [ 30.289141] kasan_save_stack+0x22/0x50 [ 30.289761] kasan_set_track+0x25/0x30 [ 30.290306] kasan_save_free_info+0x2b/0x50 [ 30.290890] __kasan_slab_free+0x10a/0x190 [ 30.291480] kmem_cache_free+0x10d/0x4d0 [ 30.292060] rcu_core+0x8c8/0x2860 [ 30.292539] __do_softirq+0x1b7/0x7d4 [ 30.293070] [ 30.293327] Last potentially related work creation: [ 30.293992] kasan_save_stack+0x22/0x50 [ 30.294551] __kasan_record_aux_stack+0x8e/0xa0 [ 30.295192] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.295907] remove_vma+0x139/0x170 [ 30.296412] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.297029] do_vmi_munmap+0x1f1/0x2b0 [ 30.297570] __vm_munmap+0x138/0x3a0 [ 30.298084] __x64_sys_munmap+0x59/0x80 [ 30.298632] do_syscall_64+0x3f/0x90 [ 30.299169] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.299881] [ 30.300120] The buggy address belongs to the object at ffff8880094c3570 [ 30.300120] which belongs to the cache vm_area_struct of size 168 [ 30.301741] The buggy address is located 88 bytes inside of [ 30.301741] freed 168-byte region [ffff8880094c3570, ffff8880094c3618) [ 30.303244] [ 30.303469] The buggy address belongs to the physical page: [ 30.304174] page:00000000a2ac4530 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x94c3 [ 30.305335] memcg:ffff888010304c01 [ 30.305802] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.306488] page_type: 0xffffffff() [ 30.306959] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.307927] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888010304c01 [ 30.308877] page dumped because: kasan: bad access detected [ 30.309576] [ 30.309800] Memory state around the buggy address: [ 30.310411] ffff8880094c3480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.311316] ffff8880094c3500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 30.312208] >ffff8880094c3580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.313089] ^ [ 30.313796] ffff8880094c3600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.314686] ffff8880094c3680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.315595] ================================================================== [ 30.316616] Disabling lock debugging due to kernel taint [ 32.575572] BUG: Bad rss-counter state mm:00000000071f5495 type:MM_FILEPAGES val:33 [ 32.576763] BUG: Bad rss-counter state mm:00000000071f5495 type:MM_ANONPAGES val:22 [ 33.057355] BUG: Bad rss-counter state mm:00000000f929ff53 type:MM_FILEPAGES val:33 [ 33.058578] BUG: Bad rss-counter state mm:00000000f929ff53 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:49332' (ECDSA) to the list of known hosts. 2023/06/20 12:53:13 fuzzer started 2023/06/20 12:53:13 dialing manager at localhost:36067 2023/06/20 12:53:13 checking machine... 2023/06/20 12:53:13 checking revisions... [ 33.769048] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:53:13 testing simple program... [ 33.828472] cgroup: Unknown subsys name 'net' [ 33.876800] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:53:12 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000293 RCX=ffffffff812e0473 RDX=0000000000000000 RSI=0000000000000004 RDI=ffff8880169b61d0 RBP=ffffffff84535ffc RSP=ffff8880146cf680 R8 =0000000000000000 R9 =ffffed1002d36c3a R10=ffff8880169b61d3 R11=000009fa000009fa R12=ffff88800fca73c0 R13=0000000000000000 R14=ffff8880169b6579 R15=ffff8880169b6600 RIP=ffffffff815342b7 RFL=00000002 [-------] 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 00007facbcd0b900 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=00007ffc21a33000 CR3=000000001a254000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 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=ffff888008c04400 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=00007f0b7fc8a330 CR3=000000000edec000 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=2032313a33353a3231203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032313a33353a3231203032 XMM08=00007fc9840102d00000004900000080 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000