syzkaller login: [ 30.836449] BUG: Bad rss-counter state mm:00000000b408af4b type:MM_FILEPAGES val:33 [ 30.837693] BUG: Bad rss-counter state mm:00000000b408af4b type:MM_ANONPAGES val:22 [ 30.875822] ================================================================== [ 30.876910] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.878177] Read of size 8 at addr ffff88801a29f798 by task sshd/220 [ 30.879119] [ 30.879378] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.880463] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.881641] Call Trace: [ 30.882031] [ 30.882376] dump_stack_lvl+0x91/0xf0 [ 30.882980] print_report+0xcc/0x620 [ 30.883569] ? __virt_addr_valid+0x102/0x340 [ 30.884245] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.885009] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.885757] kasan_report+0xbe/0xf0 [ 30.886325] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.887073] vma_interval_tree_remove+0xc75/0xec0 [ 30.887818] vma_prepare+0xc54/0x11a0 [ 30.888411] __split_vma+0x5af/0x950 [ 30.888991] ? __pfx___split_vma+0x10/0x10 [ 30.889636] ? find_held_lock+0x2c/0x110 [ 30.890269] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.890959] ? lock_is_held_type+0x9f/0x120 [ 30.891643] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.892392] ? mtree_range_walk+0x632/0x900 [ 30.893054] ? mas_walk+0x5c7/0x7c0 [ 30.893630] do_vmi_munmap+0x1f1/0x2b0 [ 30.894236] mmap_region+0x1f9/0x2660 [ 30.894821] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.895365] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.896059] ? __pfx_lock_acquire+0x10/0x10 [ 30.896567] ? __pfx_mmap_region+0x10/0x10 [ 30.897067] ? security_mmap_addr+0x7d/0xa0 [ 30.897569] ? get_unmapped_area+0x1f5/0x3f0 [ 30.898089] do_mmap+0x854/0xf00 [ 30.898512] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.899001] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.899565] ksys_mmap_pgoff+0x3af/0x500 [ 30.900071] do_syscall_64+0x3f/0x90 [ 30.900545] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.901189] RIP: 0033:0x7f710803fd82 [ 30.901642] 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 [ 30.903793] RSP: 002b:00007ffc2e375fd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.904699] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f710803fd82 [ 30.905546] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7107479000 [ 30.906389] RBP: 00007f7107479000 R08: 0000000000000009 R09: 0000000000001000 [ 30.907233] R10: 0000000000000812 R11: 0000000000000206 R12: 00005618df5dcd90 [ 30.908093] R13: 00007ffc2e375ff0 R14: 00007ffc2e376020 R15: 00007ffc2e376380 [ 30.908952] [ 30.909245] [ 30.909461] Allocated by task 213: [ 30.909889] kasan_save_stack+0x22/0x50 [ 30.910397] kasan_set_track+0x25/0x30 [ 30.910884] __kasan_slab_alloc+0x59/0x70 [ 30.911417] kmem_cache_alloc+0x16b/0x370 [ 30.911952] vm_area_dup+0x20/0x160 [ 30.912414] __split_vma+0x170/0x950 [ 30.912879] split_vma+0xc6/0x110 [ 30.913318] mprotect_fixup+0x8d2/0xb30 [ 30.913829] do_mprotect_pkey+0x87e/0xd40 [ 30.914355] __x64_sys_mprotect+0x78/0xc0 [ 30.914881] do_syscall_64+0x3f/0x90 [ 30.915357] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.916011] [ 30.916228] Freed by task 213: [ 30.916616] kasan_save_stack+0x22/0x50 [ 30.917126] kasan_set_track+0x25/0x30 [ 30.917620] kasan_save_free_info+0x2b/0x50 [ 30.918142] __kasan_slab_free+0x10a/0x190 [ 30.918673] kmem_cache_free+0x10d/0x4d0 [ 30.919176] rcu_core+0x8c8/0x2860 [ 30.919625] __do_softirq+0x1b7/0x7d4 [ 30.920103] [ 30.920326] Last potentially related work creation: [ 30.920982] kasan_save_stack+0x22/0x50 [ 30.921498] __kasan_record_aux_stack+0x8e/0xa0 [ 30.922080] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.922720] remove_vma+0x139/0x170 [ 30.923175] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.923742] do_vmi_munmap+0x1f1/0x2b0 [ 30.924232] __vm_munmap+0x138/0x3a0 [ 30.924695] __x64_sys_munmap+0x59/0x80 [ 30.925186] do_syscall_64+0x3f/0x90 [ 30.925653] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.926292] [ 30.926504] The buggy address belongs to the object at ffff88801a29f740 [ 30.926504] which belongs to the cache vm_area_struct of size 168 [ 30.927999] The buggy address is located 88 bytes inside of [ 30.927999] freed 168-byte region [ffff88801a29f740, ffff88801a29f7e8) [ 30.929411] [ 30.929622] The buggy address belongs to the physical page: [ 30.930279] page:0000000007cc2a65 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a29f [ 30.931372] memcg:ffff88800f5bb301 [ 30.931806] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.932449] page_type: 0xffffffff() [ 30.932893] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.933809] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f5bb301 [ 30.934724] page dumped because: kasan: bad access detected [ 30.935386] [ 30.935620] Memory state around the buggy address: [ 30.936206] ffff88801a29f680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.937058] ffff88801a29f700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.937917] >ffff88801a29f780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.938788] ^ [ 30.939279] ffff88801a29f800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.940153] ffff88801a29f880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.941012] ================================================================== [ 30.941936] Disabling lock debugging due to kernel taint [ 32.897332] BUG: Bad rss-counter state mm:000000002300613f type:MM_FILEPAGES val:33 [ 32.898369] BUG: Bad rss-counter state mm:000000002300613f type:MM_ANONPAGES val:22 [ 33.433413] BUG: Bad rss-counter state mm:00000000b7e9bb97 type:MM_FILEPAGES val:33 [ 33.434589] BUG: Bad rss-counter state mm:00000000b7e9bb97 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:26254' (ECDSA) to the list of known hosts. 2023/06/20 13:55:18 fuzzer started 2023/06/20 13:55:19 dialing manager at localhost:36067 2023/06/20 13:55:19 checking machine... 2023/06/20 13:55:19 checking revisions... [ 34.059753] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:55:19 testing simple program... [ 34.121041] cgroup: Unknown subsys name 'net' [ 34.159959] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:55:18 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=00007ffcaa53e000 RCX=0000000000000000 RDX=ffff888016ec8000 RSI=ffffffff8113cfd8 RDI=0000000000000006 RBP=00007ffffffff000 RSP=ffff888016de7f00 R8 =0000000000000006 R9 =00007ffcaa53e000 R10=00007ffffffff000 R11=0000000000000000 R12=0000000000000000 R13=0000000000000000 R14=00007ffcaa53e000 R15=0000000000000000 RIP=ffffffff814c089b RFL=00000046 [---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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007faf65ec6900 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=00007ffcaa53e000 CR3=00000000159fe000 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=00000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=c523fd73e4a8fc7e41a9c1f64ecc1322 XMM04=9259edbd636c4b28564248eae8936578 XMM05=00000000000000000000000000000000 XMM06=9223ed73636c4b28414248ea4e931322 XMM07=672065736f6c635f6e6f69737365733a XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000002 RBX=0000000000000002 RCX=ffffffff86098092 RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff88806cf09af0 RSP=ffff88806cf099d8 R8 =ffffffff86098096 R9 =0000000000000000 R10=0000000000038001 R11=0000000000006097 R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88806cf09a98 R15=ffff88806cf09a98 RIP=ffffffff81130bc6 RFL=00000297 [--S-APC] 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=00007fef0e1113a0 CR3=000000000c5fc000 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=2038313a35353a3331203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038313a35353a3331203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000