syzkaller login: [ 28.945269] BUG: Bad rss-counter state mm:00000000869173d8 type:MM_FILEPAGES val:33 [ 28.946227] BUG: Bad rss-counter state mm:00000000869173d8 type:MM_ANONPAGES val:22 [ 29.109579] ================================================================== [ 29.110505] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.111469] Read of size 8 at addr ffff88800ca93d08 by task sshd/219 [ 29.112255] [ 29.112480] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 29.113437] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.114434] Call Trace: [ 29.114767] [ 29.115060] dump_stack_lvl+0x91/0xf0 [ 29.115562] print_report+0xcc/0x620 [ 29.116059] ? __virt_addr_valid+0x102/0x340 [ 29.116622] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.117290] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.117923] kasan_report+0xbe/0xf0 [ 29.118413] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.119044] vma_interval_tree_remove+0xc75/0xec0 [ 29.119669] vma_prepare+0xc54/0x11a0 [ 29.120176] __split_vma+0x5af/0x950 [ 29.120654] ? __pfx___split_vma+0x10/0x10 [ 29.121199] ? find_held_lock+0x2c/0x110 [ 29.121731] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.122302] ? lock_is_held_type+0x9f/0x120 [ 29.122852] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.123465] ? mtree_range_walk+0x632/0x900 [ 29.124011] ? mas_walk+0x5c7/0x7c0 [ 29.124484] do_vmi_munmap+0x1f1/0x2b0 [ 29.124974] mmap_region+0x1f9/0x2660 [ 29.125485] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.125994] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.126713] ? __pfx_lock_acquire+0x10/0x10 [ 29.127248] ? __pfx_mmap_region+0x10/0x10 [ 29.127792] ? security_mmap_addr+0x7d/0xa0 [ 29.128323] ? get_unmapped_area+0x1f5/0x3f0 [ 29.128884] do_mmap+0x854/0xf00 [ 29.129333] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.129831] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.130392] ksys_mmap_pgoff+0x3af/0x500 [ 29.130897] do_syscall_64+0x3f/0x90 [ 29.131377] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.132025] RIP: 0033:0x7f19464bbd82 [ 29.132483] 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 [ 29.134620] RSP: 002b:00007ffe986e01b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.135525] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f19464bbd82 [ 29.136371] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f19458f5000 [ 29.137246] RBP: 00007f19458f5000 R08: 0000000000000009 R09: 0000000000001000 [ 29.138096] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557764c5aec0 [ 29.138940] R13: 00007ffe986e01d0 R14: 00007ffe986e0200 R15: 00007ffe986e0560 [ 29.139796] [ 29.140090] [ 29.140306] Allocated by task 212: [ 29.140732] kasan_save_stack+0x22/0x50 [ 29.141247] kasan_set_track+0x25/0x30 [ 29.141738] __kasan_slab_alloc+0x59/0x70 [ 29.142260] kmem_cache_alloc+0x16b/0x370 [ 29.142773] vm_area_dup+0x20/0x160 [ 29.143227] __split_vma+0x170/0x950 [ 29.143691] split_vma+0xc6/0x110 [ 29.144129] mprotect_fixup+0x8d2/0xb30 [ 29.144628] do_mprotect_pkey+0x87e/0xd40 [ 29.145172] __x64_sys_mprotect+0x78/0xc0 [ 29.145691] do_syscall_64+0x3f/0x90 [ 29.146163] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.146805] [ 29.147022] Freed by task 212: [ 29.147414] kasan_save_stack+0x22/0x50 [ 29.147913] kasan_set_track+0x25/0x30 [ 29.148410] kasan_save_free_info+0x2b/0x50 [ 29.148939] __kasan_slab_free+0x10a/0x190 [ 29.149490] kmem_cache_free+0x10d/0x4d0 [ 29.149994] rcu_core+0x8c8/0x2860 [ 29.150446] __do_softirq+0x1b7/0x7d4 [ 29.150923] [ 29.151143] Last potentially related work creation: [ 29.151722] kasan_save_stack+0x22/0x50 [ 29.152227] __kasan_record_aux_stack+0x8e/0xa0 [ 29.152799] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.153459] remove_vma+0x139/0x170 [ 29.153909] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.154472] do_vmi_munmap+0x1f1/0x2b0 [ 29.154978] __vm_munmap+0x138/0x3a0 [ 29.155447] __x64_sys_munmap+0x59/0x80 [ 29.155948] do_syscall_64+0x3f/0x90 [ 29.156425] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.157071] [ 29.157292] The buggy address belongs to the object at ffff88800ca93cb0 [ 29.157292] which belongs to the cache vm_area_struct of size 168 [ 29.158773] The buggy address is located 88 bytes inside of [ 29.158773] freed 168-byte region [ffff88800ca93cb0, ffff88800ca93d58) [ 29.160159] [ 29.160377] The buggy address belongs to the physical page: [ 29.161043] page:0000000016d0ee64 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xca93 [ 29.162122] memcg:ffff88800e176f01 [ 29.162547] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.163187] page_type: 0xffffffff() [ 29.163636] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 29.164551] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e176f01 [ 29.165458] page dumped because: kasan: bad access detected [ 29.166112] [ 29.166328] Memory state around the buggy address: [ 29.166907] ffff88800ca93c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 29.167757] ffff88800ca93c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 29.168615] >ffff88800ca93d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 29.169469] ^ [ 29.169906] ffff88800ca93d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 29.170762] ffff88800ca93e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 29.171606] ================================================================== [ 29.172603] Disabling lock debugging due to kernel taint [ 31.407484] BUG: Bad rss-counter state mm:000000004bb5ea20 type:MM_FILEPAGES val:33 [ 31.408783] BUG: Bad rss-counter state mm:000000004bb5ea20 type:MM_ANONPAGES val:22 [ 31.997756] BUG: Bad rss-counter state mm:000000001d32d098 type:MM_FILEPAGES val:33 [ 31.998972] BUG: Bad rss-counter state mm:000000001d32d098 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:49025' (ECDSA) to the list of known hosts. 2023/06/19 14:13:20 fuzzer started 2023/06/19 14:13:20 dialing manager at localhost:44161 2023/06/19 14:13:20 checking machine... 2023/06/19 14:13:20 checking revisions... [ 32.643647] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:13:20 testing simple program... [ 32.701157] cgroup: Unknown subsys name 'net' [ 32.753779] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:13:19 Registers: info registers vcpu 0 RAX=ffffffff8613fb4d RBX=0000000000000001 RCX=ffffffff8613fb48 RDX=0000000000000000 RSI=1ffffffff0c27f69 RDI=ffffffff85e0237c RBP=ffff88806ce09ad0 RSP=ffff88806ce09a08 R8 =ffffffff8613fb48 R9 =ffff88806ce09ab8 R10=0000000000038001 R11=00000000000223ea R12=ffff88806ce09ad8 R13=ffff88806ce09ac0 R14=ffff88806ce09ab9 R15=ffff88806ce09a78 RIP=ffffffff81130a5b RFL=00000217 [----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 00007f9f91ca3900 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=00007f9f91097430 CR3=0000000008ee0000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=0a9c4a543ffedec100000000000ae988 XMM05=7ba3501a7d9129140000000000134438 XMM06=806171799158d9670000000000133228 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff110011caf2b RSI=ffffffff84531da7 RDI=ffff888008e579c8 RBP=ffff888008e57998 RSP=ffff888008e578f0 R8 =0000000000000001 R9 =ffff888008e57940 R10=0000000000038001 R11=000000000000fdc6 R12=ffff888008e579c8 R13=0000000000000000 R14=ffff888008e2d1c0 R15=ffff88800e7694d8 RIP=ffffffff813ad42f RFL=00000282 [--S----] 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=00007ffe716ef000 CR3=000000000ed6c000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000