syzkaller login: [ 31.415327] BUG: Bad rss-counter state mm:000000006cb52b40 type:MM_FILEPAGES val:33 [ 31.417271] BUG: Bad rss-counter state mm:000000006cb52b40 type:MM_ANONPAGES val:22 [ 31.576412] ================================================================== [ 31.577549] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.578544] Read of size 8 at addr ffff888019c6fed8 by task sshd/220 [ 31.579447] [ 31.579665] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.580569] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.581607] Call Trace: [ 31.581929] [ 31.582217] dump_stack_lvl+0x91/0xf0 [ 31.582714] print_report+0xcc/0x620 [ 31.583213] ? __virt_addr_valid+0x102/0x340 [ 31.583775] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.584412] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.585048] kasan_report+0xbe/0xf0 [ 31.585532] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.586172] vma_interval_tree_remove+0xc75/0xec0 [ 31.586790] vma_prepare+0xc54/0x11a0 [ 31.587288] __split_vma+0x5af/0x950 [ 31.587780] ? __pfx___split_vma+0x10/0x10 [ 31.588338] ? find_held_lock+0x2c/0x110 [ 31.588899] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.589488] ? lock_is_held_type+0x9f/0x120 [ 31.590044] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.590661] ? mtree_range_walk+0x632/0x900 [ 31.591231] ? mas_walk+0x5c7/0x7c0 [ 31.591722] do_vmi_munmap+0x1f1/0x2b0 [ 31.592234] mmap_region+0x1f9/0x2660 [ 31.592736] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.593269] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.594009] ? __pfx_lock_acquire+0x10/0x10 [ 31.594563] ? __pfx_mmap_region+0x10/0x10 [ 31.595113] ? security_mmap_addr+0x7d/0xa0 [ 31.595665] ? get_unmapped_area+0x1f5/0x3f0 [ 31.596232] do_mmap+0x854/0xf00 [ 31.596689] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.597222] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.597803] ksys_mmap_pgoff+0x3af/0x500 [ 31.598335] do_syscall_64+0x3f/0x90 [ 31.598833] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.599507] RIP: 0033:0x7f981a45dd82 [ 31.599982] 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 [ 31.602182] RSP: 002b:00007fffc49bcfd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.603118] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f981a45dd82 [ 31.603988] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9819897000 [ 31.604854] RBP: 00007f9819897000 R08: 0000000000000009 R09: 0000000000001000 [ 31.605737] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e50452aec0 [ 31.606610] R13: 00007fffc49bcff0 R14: 00007fffc49bd020 R15: 00007fffc49bd380 [ 31.607494] [ 31.607797] [ 31.608012] Allocated by task 213: [ 31.608457] kasan_save_stack+0x22/0x50 [ 31.608991] kasan_set_track+0x25/0x30 [ 31.609498] __kasan_slab_alloc+0x59/0x70 [ 31.610034] kmem_cache_alloc+0x16b/0x370 [ 31.610561] vm_area_dup+0x20/0x160 [ 31.611025] __split_vma+0x170/0x950 [ 31.611503] split_vma+0xc6/0x110 [ 31.611957] mprotect_fixup+0x8d2/0xb30 [ 31.612471] do_mprotect_pkey+0x87e/0xd40 [ 31.613013] __x64_sys_mprotect+0x78/0xc0 [ 31.613552] do_syscall_64+0x3f/0x90 [ 31.614041] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.614707] [ 31.614931] Freed by task 213: [ 31.615333] kasan_save_stack+0x22/0x50 [ 31.615857] kasan_set_track+0x25/0x30 [ 31.616368] kasan_save_free_info+0x2b/0x50 [ 31.616932] __kasan_slab_free+0x10a/0x190 [ 31.617476] kmem_cache_free+0x10d/0x4d0 [ 31.617993] rcu_core+0x8c8/0x2860 [ 31.618453] __do_softirq+0x1b7/0x7d4 [ 31.618941] [ 31.619160] Last potentially related work creation: [ 31.619763] kasan_save_stack+0x22/0x50 [ 31.620272] __kasan_record_aux_stack+0x8e/0xa0 [ 31.620867] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.621531] remove_vma+0x139/0x170 [ 31.621994] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.622563] do_vmi_munmap+0x1f1/0x2b0 [ 31.623057] __vm_munmap+0x138/0x3a0 [ 31.623536] __x64_sys_munmap+0x59/0x80 [ 31.624044] do_syscall_64+0x3f/0x90 [ 31.624531] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.625204] [ 31.625428] The buggy address belongs to the object at ffff888019c6fe80 [ 31.625428] which belongs to the cache vm_area_struct of size 168 [ 31.626938] The buggy address is located 88 bytes inside of [ 31.626938] freed 168-byte region [ffff888019c6fe80, ffff888019c6ff28) [ 31.628386] [ 31.628608] The buggy address belongs to the physical page: [ 31.629297] page:00000000ee66f0cf refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19c6f [ 31.630419] memcg:ffff88801691e401 [ 31.630854] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.631519] page_type: 0xffffffff() [ 31.631976] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.632917] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801691e401 [ 31.633850] page dumped because: kasan: bad access detected [ 31.634531] [ 31.634756] Memory state around the buggy address: [ 31.635347] ffff888019c6fd80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.636239] ffff888019c6fe00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 31.637135] >ffff888019c6fe80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.638019] ^ [ 31.638764] ffff888019c6ff00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 31.639672] ffff888019c6ff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.640560] ================================================================== [ 31.641622] Disabling lock debugging due to kernel taint [ 33.527764] BUG: Bad rss-counter state mm:000000005f8a5f83 type:MM_FILEPAGES val:33 [ 33.528981] BUG: Bad rss-counter state mm:000000005f8a5f83 type:MM_ANONPAGES val:22 [ 33.884598] BUG: Bad rss-counter state mm:00000000bcac2b76 type:MM_FILEPAGES val:33 [ 33.885631] BUG: Bad rss-counter state mm:00000000bcac2b76 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:25474' (ECDSA) to the list of known hosts. 2023/06/20 10:58:17 fuzzer started 2023/06/20 10:58:17 dialing manager at localhost:36067 2023/06/20 10:58:17 checking machine... 2023/06/20 10:58:17 checking revisions... [ 34.603933] kmemleak: Automatic memory scanning thread ended 2023/06/20 10:58:17 testing simple program... [ 34.649643] cgroup: Unknown subsys name 'net' [ 34.686765] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:58:17 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce09a98 RCX=ffffffff864bd7ec RDX=1ffff1100d9c1353 RSI=ffffffff85407f00 RDI=ffff88806ce09a98 RBP=ffffffff85407f00 RSP=ffff88806ce099f0 R8 =ffffffff864bd7f0 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b54e7 R12=0000000000000008 R13=ffff88806ce09ae0 R14=ffffffff85407f08 R15=ffff88806ce09a98 RIP=ffffffff81130416 RFL=00000286 [--S--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=00007f8365549000 CR3=000000000f55a000 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=2036313a38353a3031203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036313a38353a3031203032 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0100000000010200 RBX=ffff8880197bba70 RCX=ffffea000065ee81 RDX=ffffea000065ee80 RSI=ffff888019d56800 RDI=ffff88800ba5e140 RBP=0000000000000000 RSP=ffff888016af7a38 R8 =ffff8880197bba70 R9 =ffffffff8181032f R10=ffffea0000675400 R11=0000000000000000 R12=dffffc0000000000 R13=ffff888016af7a78 R14=0000000000000000 R15=ffff888019d56800 RIP=ffffffff818103a7 RFL=00000202 [-------] 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 00007f955c8c1900 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=00007ffd69ae1000 CR3=000000000de08000 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