syzkaller login: [ 30.604547] BUG: Bad rss-counter state mm:000000006bf3c37b type:MM_FILEPAGES val:33 [ 30.606125] BUG: Bad rss-counter state mm:000000006bf3c37b type:MM_ANONPAGES val:22 [ 30.643053] ================================================================== [ 30.644359] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.645602] Read of size 8 at addr ffff88800dabc968 by task sshd/222 [ 30.646557] [ 30.646838] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.647929] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.649156] Call Trace: [ 30.649555] [ 30.649908] dump_stack_lvl+0x91/0xf0 [ 30.650523] print_report+0xcc/0x620 [ 30.651123] ? __virt_addr_valid+0x102/0x340 [ 30.651808] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.652587] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.653360] kasan_report+0xbe/0xf0 [ 30.653953] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.654733] vma_interval_tree_remove+0xc75/0xec0 [ 30.655495] vma_prepare+0xc54/0x11a0 [ 30.656105] __split_vma+0x5af/0x950 [ 30.656678] ? __pfx___split_vma+0x10/0x10 [ 30.657321] ? find_held_lock+0x2c/0x110 [ 30.657966] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.658665] ? lock_is_held_type+0x9f/0x120 [ 30.659338] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.660104] ? mtree_range_walk+0x632/0x900 [ 30.660782] ? mas_walk+0x5c7/0x7c0 [ 30.661360] do_vmi_munmap+0x1f1/0x2b0 [ 30.661971] mmap_region+0x1f9/0x2660 [ 30.662576] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.663222] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.664113] ? __pfx_lock_acquire+0x10/0x10 [ 30.664753] ? __pfx_mmap_region+0x10/0x10 [ 30.665421] ? security_mmap_addr+0x7d/0xa0 [ 30.666084] ? get_unmapped_area+0x1f5/0x3f0 [ 30.666759] do_mmap+0x854/0xf00 [ 30.667297] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.667912] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.668628] ksys_mmap_pgoff+0x3af/0x500 [ 30.669254] do_syscall_64+0x3f/0x90 [ 30.669850] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.670646] RIP: 0033:0x7f4c445e1d82 [ 30.671208] 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 [ 30.673866] RSP: 002b:00007ffe2d6d72f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.675011] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4c445e1d82 [ 30.676095] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4c43a1b000 [ 30.677170] RBP: 00007f4c43a1b000 R08: 0000000000000009 R09: 0000000000001000 [ 30.678239] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c24d553f70 [ 30.679307] R13: 00007ffe2d6d7310 R14: 00007ffe2d6d7340 R15: 00007ffe2d6d76a0 [ 30.680402] [ 30.680774] [ 30.681034] Allocated by task 215: [ 30.681575] kasan_save_stack+0x22/0x50 [ 30.682194] kasan_set_track+0x25/0x30 [ 30.682796] __kasan_slab_alloc+0x59/0x70 [ 30.683440] kmem_cache_alloc+0x16b/0x370 [ 30.684093] vm_area_dup+0x20/0x160 [ 30.684662] __split_vma+0x170/0x950 [ 30.685257] split_vma+0xc6/0x110 [ 30.685792] mprotect_fixup+0x8d2/0xb30 [ 30.686414] do_mprotect_pkey+0x87e/0xd40 [ 30.687055] __x64_sys_mprotect+0x78/0xc0 [ 30.687696] do_syscall_64+0x3f/0x90 [ 30.688300] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.689095] [ 30.689357] Freed by task 215: [ 30.689845] kasan_save_stack+0x22/0x50 [ 30.690462] kasan_set_track+0x25/0x30 [ 30.691067] kasan_save_free_info+0x2b/0x50 [ 30.691729] __kasan_slab_free+0x10a/0x190 [ 30.692457] kmem_cache_free+0x10d/0x4d0 [ 30.693114] rcu_core+0x8c8/0x2860 [ 30.693668] __do_softirq+0x1b7/0x7d4 [ 30.694266] [ 30.694532] Last potentially related work creation: [ 30.695268] kasan_save_stack+0x22/0x50 [ 30.695887] __kasan_record_aux_stack+0x8e/0xa0 [ 30.696633] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.697305] remove_vma+0x139/0x170 [ 30.697755] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.698317] do_vmi_munmap+0x1f1/0x2b0 [ 30.698811] __vm_munmap+0x138/0x3a0 [ 30.699286] __x64_sys_munmap+0x59/0x80 [ 30.699795] do_syscall_64+0x3f/0x90 [ 30.700295] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.700950] [ 30.701173] The buggy address belongs to the object at ffff88800dabc910 [ 30.701173] which belongs to the cache vm_area_struct of size 168 [ 30.702654] The buggy address is located 88 bytes inside of [ 30.702654] freed 168-byte region [ffff88800dabc910, ffff88800dabc9b8) [ 30.704091] [ 30.704311] The buggy address belongs to the physical page: [ 30.704976] page:00000000915d8c02 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdabc [ 30.706084] memcg:ffff88800e754e01 [ 30.706512] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.707214] page_type: 0xffffffff() [ 30.707667] raw: 0100000000000200 ffff8880087a0c80 ffffea0000384940 dead000000000003 [ 30.708613] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e754e01 [ 30.709521] page dumped because: kasan: bad access detected [ 30.710192] [ 30.710410] Memory state around the buggy address: [ 30.710994] ffff88800dabc800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.711866] ffff88800dabc880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.712738] >ffff88800dabc900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.713595] ^ [ 30.714393] ffff88800dabc980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 30.715254] ffff88800dabca00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.716129] ================================================================== [ 30.717260] Disabling lock debugging due to kernel taint [ 32.727939] BUG: Bad rss-counter state mm:0000000089635934 type:MM_FILEPAGES val:33 [ 32.729137] BUG: Bad rss-counter state mm:0000000089635934 type:MM_ANONPAGES val:22 [ 33.131700] BUG: Bad rss-counter state mm:0000000070092f84 type:MM_FILEPAGES val:33 [ 33.133093] BUG: Bad rss-counter state mm:0000000070092f84 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:54304' (ECDSA) to the list of known hosts. 2023/06/20 11:03:22 fuzzer started 2023/06/20 11:03:22 dialing manager at localhost:36067 2023/06/20 11:03:22 checking machine... 2023/06/20 11:03:22 checking revisions... [ 33.897764] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:03:22 testing simple program... [ 33.945752] cgroup: Unknown subsys name 'net' [ 33.997545] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:03:21 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007f9a26bbce50 CR3=0000000016f30000 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=33303a3131203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3133325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363636 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=dffffc0000000000 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff11002b2fed3 RSI=ffffffff844ae59b RDI=ffff88801597f698 RBP=ffff88801597f730 RSP=ffff88801597f670 R8 =0000000000000001 R9 =ffff88801597f6d8 R10=0000000000038001 R11=0000000000020cc7 R12=ffff88801597f760 R13=0000000000000000 R14=ffff888016d751c0 R15=ffff88801597f698 RIP=ffffffff811305f0 RFL=00000212 [----A--] 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 00007ff162ea7900 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=00007ff162e6c008 CR3=000000000d684000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000