[ 27.354452] BUG: Bad rss-counter state mm:00000000b3c91287 type:MM_FILEPAGES val:33 [ 27.355478] BUG: Bad rss-counter state mm:00000000b3c91287 type:MM_ANONPAGES val:22 [ 27.516857] ================================================================== [ 27.517771] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 27.518731] Read of size 8 at addr ffff88800e8575c8 by task sshd/219 [ 27.519608] [ 27.519825] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 27.520708] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 27.521721] Call Trace: [ 27.522042] [ 27.522331] dump_stack_lvl+0x91/0xf0 [ 27.522815] print_report+0xcc/0x620 [ 27.523319] ? __virt_addr_valid+0x102/0x340 [ 27.523868] ? vma_interval_tree_remove+0xc75/0xec0 [ 27.524489] ? vma_interval_tree_remove+0xc75/0xec0 [ 27.525119] kasan_report+0xbe/0xf0 [ 27.525593] ? vma_interval_tree_remove+0xc75/0xec0 [ 27.526223] vma_interval_tree_remove+0xc75/0xec0 [ 27.526819] vma_prepare+0xc54/0x11a0 [ 27.527308] __split_vma+0x5af/0x950 [ 27.527783] ? __pfx___split_vma+0x10/0x10 [ 27.528308] ? find_held_lock+0x2c/0x110 [ 27.528826] do_vmi_align_munmap+0x2ba/0x11f0 [ 27.529387] ? lock_is_held_type+0x9f/0x120 [ 27.529924] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 27.530532] ? mtree_range_walk+0x632/0x900 [ 27.531076] ? mas_walk+0x5c7/0x7c0 [ 27.531551] do_vmi_munmap+0x1f1/0x2b0 [ 27.532041] mmap_region+0x1f9/0x2660 [ 27.532521] ? vm_mmap_pgoff+0x15c/0x3a0 [ 27.533033] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 27.533752] ? __pfx_lock_acquire+0x10/0x10 [ 27.534292] ? __pfx_mmap_region+0x10/0x10 [ 27.534825] ? security_mmap_addr+0x7d/0xa0 [ 27.535364] ? get_unmapped_area+0x1f5/0x3f0 [ 27.535915] do_mmap+0x854/0xf00 [ 27.536353] vm_mmap_pgoff+0x1a6/0x3a0 [ 27.536848] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 27.537415] ksys_mmap_pgoff+0x3af/0x500 [ 27.537921] do_syscall_64+0x3f/0x90 [ 27.538402] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 27.539048] RIP: 0033:0x7f7f8e2abd82 [ 27.539514] 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 [ 27.541624] RSP: 002b:00007ffd561554a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 27.542531] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7f8e2abd82 [ 27.543408] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7f8d6e5000 [ 27.544247] RBP: 00007f7f8d6e5000 R08: 0000000000000009 R09: 0000000000001000 [ 27.545091] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fd9a3f8f70 [ 27.545938] R13: 00007ffd561554c0 R14: 00007ffd561554f0 R15: 00007ffd56155850 [ 27.546792] [ 27.547081] [ 27.547307] Allocated by task 212: [ 27.547737] kasan_save_stack+0x22/0x50 [ 27.548241] kasan_set_track+0x25/0x30 [ 27.548735] __kasan_slab_alloc+0x59/0x70 [ 27.549264] kmem_cache_alloc+0x16b/0x370 [ 27.549785] vm_area_dup+0x20/0x160 [ 27.550250] __split_vma+0x170/0x950 [ 27.550725] split_vma+0xc6/0x110 [ 27.551168] mprotect_fixup+0x8d2/0xb30 [ 27.551687] do_mprotect_pkey+0x87e/0xd40 [ 27.552218] __x64_sys_mprotect+0x78/0xc0 [ 27.552749] do_syscall_64+0x3f/0x90 [ 27.553220] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 27.553874] [ 27.554092] Freed by task 212: [ 27.554489] kasan_save_stack+0x22/0x50 [ 27.554999] kasan_set_track+0x25/0x30 [ 27.555497] kasan_save_free_info+0x2b/0x50 [ 27.556040] __kasan_slab_free+0x10a/0x190 [ 27.556574] kmem_cache_free+0x10d/0x4d0 [ 27.557089] rcu_core+0x8c8/0x2860 [ 27.557538] __do_softirq+0x1b7/0x7d4 [ 27.558017] [ 27.558235] Last potentially related work creation: [ 27.558815] kasan_save_stack+0x22/0x50 [ 27.559333] __kasan_record_aux_stack+0x8e/0xa0 [ 27.559908] __call_rcu_common.constprop.0+0x6a/0xb90 [ 27.560551] remove_vma+0x139/0x170 [ 27.561006] do_vmi_align_munmap+0xd4a/0x11f0 [ 27.561562] do_vmi_munmap+0x1f1/0x2b0 [ 27.562057] __vm_munmap+0x138/0x3a0 [ 27.562523] __x64_sys_munmap+0x59/0x80 [ 27.563022] do_syscall_64+0x3f/0x90 [ 27.563514] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 27.564159] [ 27.564381] The buggy address belongs to the object at ffff88800e857570 [ 27.564381] which belongs to the cache vm_area_struct of size 168 [ 27.565851] The buggy address is located 88 bytes inside of [ 27.565851] freed 168-byte region [ffff88800e857570, ffff88800e857618) [ 27.567263] [ 27.567479] The buggy address belongs to the physical page: [ 27.568138] page:00000000ebfa0f38 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe857 [ 27.569224] memcg:ffff88800ea29c01 [ 27.569657] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 27.570355] page_type: 0xffffffff() [ 27.570810] raw: 0100000000000200 ffff88800879fc80 ffffea00003c26c0 dead000000000009 [ 27.571760] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ea29c01 [ 27.572668] page dumped because: kasan: bad access detected [ 27.573327] [ 27.573541] Memory state around the buggy address: [ 27.574127] ffff88800e857480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 27.574987] ffff88800e857500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 27.575853] >ffff88800e857580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 27.576715] ^ [ 27.577386] ffff88800e857600: fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 [ 27.578254] ffff88800e857680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 27.579107] ================================================================== [ 27.580145] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 29.788414] BUG: Bad rss-counter state mm:00000000004c2488 type:MM_FILEPAGES val:33 [ 29.789601] BUG: Bad rss-counter state mm:00000000004c2488 type:MM_ANONPAGES val:22 [ 30.150161] BUG: Bad rss-counter state mm:00000000c86fe421 type:MM_FILEPAGES val:33 [ 30.151327] BUG: Bad rss-counter state mm:00000000c86fe421 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:65446' (ECDSA) to the list of known hosts. 2023/06/20 05:56:21 fuzzer started 2023/06/20 05:56:22 dialing manager at localhost:44161 2023/06/20 05:56:22 checking machine... 2023/06/20 05:56:22 checking revisions... [ 30.853503] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:56:22 testing simple program... [ 30.896021] cgroup: Unknown subsys name 'net' [ 30.946143] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:56:18 Registers: info registers vcpu 0 RAX=0000000000000050 RBX=ffff888009a48000 RCX=0000000000000000 RDX=00000000000101f7 RSI=ffffffff821920cb RDI=0000000000000007 RBP=00000000000003e7 RSP=ffff88800a0177d8 R8 =0000000000000007 R9 =0000000000010000 R10=00000000000101f7 R11=0000000000000128 R12=00000000000101f7 R13=ffffed1001349001 R14=ffffffff85a237a0 R15=dffffc0000000000 RIP=ffffffff821920cf RFL=00000093 [--S-A-C] 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=00007faa42b38020 CR3=0000000016734000 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=36353a3530203032206e754a3e38333c XMM01=656e6e6f637369642064657669656365 XMM02=63736964203a31313a30353538342074 XMM03=66207463656e6e6f6373696420646576 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303535 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=0000000000000000 RBX=0000000000000001 RCX=ffffffff860d68f6 RDX=1ffff11003490ed3 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88801a4876f0 RSP=ffff88801a487628 R8 =ffffffff860d68fa R9 =ffff88801a4876d8 R10=0000000000038001 R11=0000000000010b7e R12=ffff88801a4876f8 R13=ffff88801a4876e0 R14=ffff88801a4877d0 R15=ffff88801a487698 RIP=ffffffff81131280 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 00007f66f39d8900 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=00007f66f399d008 CR3=0000000015f9e000 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