syzkaller login: [ 36.456088] BUG: Bad rss-counter state mm:000000007b34daec type:MM_FILEPAGES val:33 [ 36.456824] BUG: Bad rss-counter state mm:000000007b34daec type:MM_ANONPAGES val:22 [ 36.624364] ================================================================== [ 36.625384] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.626441] Read of size 8 at addr ffff88800ff525c8 by task sshd/227 [ 36.627560] [ 36.627879] CPU: 1 PID: 227 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 36.628859] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.629982] Call Trace: [ 36.630360] <TASK> [ 36.630679] dump_stack_lvl+0x91/0xf0 [ 36.631230] print_report+0xcc/0x620 [ 36.631785] ? __virt_addr_valid+0x102/0x340 [ 36.632428] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.633113] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.633830] kasan_report+0xbe/0xf0 [ 36.634380] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.635069] vma_interval_tree_remove+0xc75/0xec0 [ 36.635737] vma_prepare+0xc54/0x11a0 [ 36.636283] __split_vma+0x5af/0x950 [ 36.636822] ? __pfx___split_vma+0x10/0x10 [ 36.637422] ? find_held_lock+0x2c/0x110 [ 36.638028] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.638670] ? lock_is_held_type+0x9f/0x120 [ 36.639290] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.639974] ? mtree_range_walk+0x632/0x900 [ 36.640619] ? mas_walk+0x5c7/0x7c0 [ 36.641147] do_vmi_munmap+0x1f1/0x2b0 [ 36.641717] mmap_region+0x1f9/0x2660 [ 36.642289] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.642875] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.643678] ? __pfx_lock_acquire+0x10/0x10 [ 36.644297] ? __pfx_mmap_region+0x10/0x10 [ 36.644903] ? security_mmap_addr+0x7d/0xa0 [ 36.645515] ? get_unmapped_area+0x1f5/0x3f0 [ 36.646147] do_mmap+0x854/0xf00 [ 36.646656] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.647202] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.647845] ksys_mmap_pgoff+0x3af/0x500 [ 36.648443] do_syscall_64+0x3f/0x90 [ 36.648983] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.649725] RIP: 0033:0x7fe8473bfd82 [ 36.650267] 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 [ 36.652677] RSP: 002b:00007ffc19075ae8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.653709] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe8473bfd82 [ 36.654677] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe8467f9000 [ 36.655635] RBP: 00007fe8467f9000 R08: 0000000000000009 R09: 0000000000001000 [ 36.656610] R10: 0000000000000812 R11: 0000000000000206 R12: 00005571b0b0ff60 [ 36.657567] R13: 00007ffc19075b00 R14: 00007ffc19075b30 R15: 00007ffc19075e90 [ 36.658551] </TASK> [ 36.658878] [ 36.659119] Allocated by task 220: [ 36.659621] kasan_save_stack+0x22/0x50 [ 36.660181] kasan_set_track+0x25/0x30 [ 36.660748] __kasan_slab_alloc+0x59/0x70 [ 36.661347] kmem_cache_alloc+0x16b/0x370 [ 36.661953] vm_area_dup+0x20/0x160 [ 36.662482] __split_vma+0x170/0x950 [ 36.663005] split_vma+0xc6/0x110 [ 36.663516] mprotect_fixup+0x8d2/0xb30 [ 36.664080] do_mprotect_pkey+0x87e/0xd40 [ 36.664701] __x64_sys_mprotect+0x78/0xc0 [ 36.665307] do_syscall_64+0x3f/0x90 [ 36.665860] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.666624] [ 36.666873] Freed by task 204: [ 36.667326] kasan_save_stack+0x22/0x50 [ 36.667911] kasan_set_track+0x25/0x30 [ 36.668566] kasan_save_free_info+0x2b/0x50 [ 36.669240] __kasan_slab_free+0x10a/0x190 [ 36.669874] kmem_cache_free+0x10d/0x4d0 [ 36.670458] rcu_core+0x8c8/0x2860 [ 36.670972] __do_softirq+0x1b7/0x7d4 [ 36.671521] [ 36.671765] Last potentially related work creation: [ 36.672447] kasan_save_stack+0x22/0x50 [ 36.673008] __kasan_record_aux_stack+0x8e/0xa0 [ 36.673664] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.674413] remove_vma+0x139/0x170 [ 36.674914] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.675562] do_vmi_munmap+0x1f1/0x2b0 [ 36.676101] __vm_munmap+0x138/0x3a0 [ 36.676643] __x64_sys_munmap+0x59/0x80 [ 36.677201] do_syscall_64+0x3f/0x90 [ 36.677758] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.678520] [ 36.678758] The buggy address belongs to the object at ffff88800ff52570 [ 36.678758] which belongs to the cache vm_area_struct of size 168 [ 36.680430] The buggy address is located 88 bytes inside of [ 36.680430] freed 168-byte region [ffff88800ff52570, ffff88800ff52618) [ 36.682017] [ 36.682274] The buggy address belongs to the physical page: [ 36.683014] page:000000009f0bffc8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xff52 [ 36.684213] memcg:ffff888015f91001 [ 36.684710] flags: 0x100000000000200(slab|node=0|zone=1) [ 36.685429] page_type: 0xffffffff() [ 36.685927] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 36.686916] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015f91001 [ 36.687896] page dumped because: kasan: bad access detected [ 36.688625] [ 36.688858] Memory state around the buggy address: [ 36.689487] ffff88800ff52480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 36.690424] ffff88800ff52500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 36.691336] >ffff88800ff52580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.692254] ^ [ 36.692970] ffff88800ff52600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 36.693905] ffff88800ff52680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.694817] ================================================================== [ 36.695988] Disabling lock debugging due to kernel taint [ 39.198644] BUG: Bad rss-counter state mm:000000000317b36d type:MM_FILEPAGES val:33 [ 39.199659] BUG: Bad rss-counter state mm:000000000317b36d type:MM_ANONPAGES val:22 [ 39.706279] BUG: Bad rss-counter state mm:00000000931a6556 type:MM_FILEPAGES val:33 [ 39.707528] BUG: Bad rss-counter state mm:00000000931a6556 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38390' (ECDSA) to the list of known hosts. 2023/06/21 09:22:34 fuzzer started 2023/06/21 09:22:35 dialing manager at localhost:36067 2023/06/21 09:22:35 checking machine... 2023/06/21 09:22:35 checking revisions... [ 40.418164] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:22:35 testing simple program... [ 40.472965] cgroup: Unknown subsys name 'net' [ 40.520380] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:22:34 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffff888009358130 RCX=ffff888009358130 RDX=00000000000d000d RSI=ffff888009358130 RDI=ffff88800844f780 RBP=ffff888019effa28 RSP=ffff888019eff990 R8 =00000000800d000c R9 =0000000000000000 R10=ffffea000024d600 R11=00000000000d000c R12=ffffea000024d600 R13=0000000000000000 R14=00000000000d000c R15=ffff88800844f780 RIP=ffffffff81809672 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 00007f9939699900 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=00007ffdd1fc3000 CR3=000000001a0ca000 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=6720646572637465733a4d41503d706f 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 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffffff8118ddc3 RCX=0000000000000001 RDX=1ffff1100d9e1359 RSI=ffff88806cf09fb8 RDI=ffffffff8118ddc3 RBP=ffffffff8118ddc3 RSP=ffff88806cf09a20 R8 =0000000000000001 R9 =ffff88806cf09ab0 R10=0000000000038001 R11=00000000000b5d59 R12=0000000000000001 R13=0000000000000000 R14=ffff888008d951c0 R15=ffff88800f5b9680 RIP=ffffffff811fc772 RFL=00000287 [--S--PC] 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=00007f7a35951320 CR3=000000001a0a8000 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=2034333a32323a3930203132206e754a XMM01=73732878696e755f6d6170203a5d3633 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3633325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034333a32323a3930203132 XMM08=20303d64696720303d64697520612f6e XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000