syzkaller login: [ 28.718240] BUG: Bad rss-counter state mm:000000008feec7ba type:MM_FILEPAGES val:33 [ 28.719318] BUG: Bad rss-counter state mm:000000008feec7ba type:MM_ANONPAGES val:22 [ 28.928474] ================================================================== [ 28.929449] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.930434] Read of size 8 at addr ffff88800e646a50 by task sshd/222 [ 28.931191] [ 28.931401] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.932316] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.933229] Call Trace: [ 28.933528] [ 28.933796] dump_stack_lvl+0x91/0xf0 [ 28.934285] print_report+0xcc/0x620 [ 28.934752] ? __virt_addr_valid+0x102/0x340 [ 28.935271] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.935851] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.936438] kasan_report+0xbe/0xf0 [ 28.936890] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.937484] vma_interval_tree_remove+0xc75/0xec0 [ 28.938055] vma_prepare+0xc54/0x11a0 [ 28.938518] __split_vma+0x5af/0x950 [ 28.938967] ? __pfx___split_vma+0x10/0x10 [ 28.939483] ? find_held_lock+0x2c/0x110 [ 28.940008] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.940564] ? lock_is_held_type+0x9f/0x120 [ 28.941111] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.941719] ? mtree_range_walk+0x632/0x900 [ 28.942260] ? mas_walk+0x5c7/0x7c0 [ 28.942762] do_vmi_munmap+0x1f1/0x2b0 [ 28.943256] mmap_region+0x1f9/0x2660 [ 28.943737] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.944258] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.944974] ? __pfx_lock_acquire+0x10/0x10 [ 28.945509] ? __pfx_mmap_region+0x10/0x10 [ 28.946038] ? security_mmap_addr+0x7d/0xa0 [ 28.946568] ? get_unmapped_area+0x1f5/0x3f0 [ 28.947115] do_mmap+0x854/0xf00 [ 28.947556] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.948055] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.948615] ksys_mmap_pgoff+0x3af/0x500 [ 28.949121] do_syscall_64+0x3f/0x90 [ 28.949654] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.950310] RIP: 0033:0x7f04f876dd82 [ 28.950782] 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 [ 28.952896] RSP: 002b:00007ffe8faf2d88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.953789] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f04f876dd82 [ 28.954655] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f04f7ba7000 [ 28.955499] RBP: 00007f04f7ba7000 R08: 0000000000000009 R09: 0000000000001000 [ 28.956336] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fc23b96f60 [ 28.957175] R13: 00007ffe8faf2da0 R14: 00007ffe8faf2dd0 R15: 00007ffe8faf3130 [ 28.958012] [ 28.958299] [ 28.958521] Allocated by task 213: [ 28.958944] kasan_save_stack+0x22/0x50 [ 28.959439] kasan_set_track+0x25/0x30 [ 28.959931] __kasan_slab_alloc+0x59/0x70 [ 28.960457] kmem_cache_alloc+0x16b/0x370 [ 28.960974] vm_area_dup+0x20/0x160 [ 28.961421] __split_vma+0x170/0x950 [ 28.961885] split_vma+0xc6/0x110 [ 28.962322] mprotect_fixup+0x8d2/0xb30 [ 28.962845] do_mprotect_pkey+0x87e/0xd40 [ 28.963356] __x64_sys_mprotect+0x78/0xc0 [ 28.963877] do_syscall_64+0x3f/0x90 [ 28.964350] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.965001] [ 28.965209] Freed by task 213: [ 28.965599] kasan_save_stack+0x22/0x50 [ 28.966104] kasan_set_track+0x25/0x30 [ 28.966616] kasan_save_free_info+0x2b/0x50 [ 28.967141] __kasan_slab_free+0x10a/0x190 [ 28.967670] kmem_cache_free+0x10d/0x4d0 [ 28.968174] rcu_core+0x8c8/0x2860 [ 28.968619] __do_softirq+0x1b7/0x7d4 [ 28.969095] [ 28.969311] Last potentially related work creation: [ 28.969895] kasan_save_stack+0x22/0x50 [ 28.970395] __kasan_record_aux_stack+0x8e/0xa0 [ 28.970985] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.971629] remove_vma+0x139/0x170 [ 28.972074] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.972622] do_vmi_munmap+0x1f1/0x2b0 [ 28.973099] __vm_munmap+0x138/0x3a0 [ 28.973553] __x64_sys_munmap+0x59/0x80 [ 28.974027] do_syscall_64+0x3f/0x90 [ 28.974529] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.975166] [ 28.975381] The buggy address belongs to the object at ffff88800e6469f8 [ 28.975381] which belongs to the cache vm_area_struct of size 168 [ 28.976842] The buggy address is located 88 bytes inside of [ 28.976842] freed 168-byte region [ffff88800e6469f8, ffff88800e646aa0) [ 28.978252] [ 28.978469] The buggy address belongs to the physical page: [ 28.979122] page:000000003ae6c7fe refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe646 [ 28.980181] memcg:ffff88800e2e9b01 [ 28.980606] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 28.981304] page_type: 0xffffffff() [ 28.981754] raw: 0100000000000200 ffff8880087a0c80 ffffea000035da80 dead000000000007 [ 28.982689] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e2e9b01 [ 28.983580] page dumped because: kasan: bad access detected [ 28.984233] [ 28.984443] Memory state around the buggy address: [ 28.985019] ffff88800e646900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 28.985867] ffff88800e646980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 28.986722] >ffff88800e646a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.987567] ^ [ 28.988262] ffff88800e646a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 28.989101] ffff88800e646b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.989946] ================================================================== [ 28.990934] Disabling lock debugging due to kernel taint [ 31.137112] BUG: Bad rss-counter state mm:000000007bd47098 type:MM_FILEPAGES val:33 [ 31.138063] BUG: Bad rss-counter state mm:000000007bd47098 type:MM_ANONPAGES val:22 [ 31.601229] BUG: Bad rss-counter state mm:000000004df4283e type:MM_FILEPAGES val:33 [ 31.602881] BUG: Bad rss-counter state mm:000000004df4283e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:13658' (ECDSA) to the list of known hosts. 2023/06/21 04:08:25 fuzzer started 2023/06/21 04:08:26 dialing manager at localhost:36067 2023/06/21 04:08:26 checking machine... 2023/06/21 04:08:26 checking revisions... [ 32.375086] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:08:26 testing simple program... [ 32.416021] cgroup: Unknown subsys name 'net' [ 32.465692] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:08:25 Registers: info registers vcpu 0 RAX=ffff888008d9fa68 RBX=0000000000000000 RCX=0000000000000000 RDX=0000000000000000 RSI=000000000000000b RDI=ffff888008d9fa68 RBP=dffffc0000000000 RSP=ffff888008d9f9d8 R8 =ffffffff860743f8 R9 =ffff888008d9f970 R10=0000000000038001 R11=0000000000000128 R12=000000000000000b R13=0000000000000000 R14=ffff888008d9fa68 R15=ffff888019851500 RIP=ffffffff813ad612 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 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=00007f16a7663000 CR3=000000000e3d0000 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=2035323a38303a3430203132206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035323a38303a3430203132 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=00000000000000f4 RCX=ffffffff82157da7 RDX=ffffed10039b4b1f RSI=00000000000000f4 RDI=ffff88801cda5800 RBP=00007ffc46e52b30 RSP=ffff88800f167a80 R8 =0000000000000001 R9 =ffffed10039b4b1e R10=ffff88801cda58f3 R11=0000000000000000 R12=ffff88801cda5800 R13=00007ffc46e52c24 R14=0000000000000000 R15=ffff88800f167d90 RIP=ffffffff82157daa RFL=00040246 [---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 00007f080432d900 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=00007ffc46e53000 CR3=0000000016a96000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000