syzkaller login: [ 30.002256] BUG: Bad rss-counter state mm:0000000083930288 type:MM_FILEPAGES val:33 [ 30.004149] BUG: Bad rss-counter state mm:0000000083930288 type:MM_ANONPAGES val:22 [ 30.171455] ================================================================== [ 30.172730] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.174035] Read of size 8 at addr ffff88800944a5c8 by task sshd/220 [ 30.175069] [ 30.175374] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.176528] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.177836] Call Trace: [ 30.178272] [ 30.178649] dump_stack_lvl+0x91/0xf0 [ 30.179334] print_report+0xcc/0x620 [ 30.179962] ? __virt_addr_valid+0x102/0x340 [ 30.180673] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.181462] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.182247] kasan_report+0xbe/0xf0 [ 30.182864] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.183659] vma_interval_tree_remove+0xc75/0xec0 [ 30.184432] vma_prepare+0xc54/0x11a0 [ 30.185048] __split_vma+0x5af/0x950 [ 30.185657] ? __pfx___split_vma+0x10/0x10 [ 30.186327] ? find_held_lock+0x2c/0x110 [ 30.187029] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.187701] ? lock_is_held_type+0x9f/0x120 [ 30.188345] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.189062] ? mtree_range_walk+0x632/0x900 [ 30.189733] ? mas_walk+0x5c7/0x7c0 [ 30.190310] do_vmi_munmap+0x1f1/0x2b0 [ 30.190919] mmap_region+0x1f9/0x2660 [ 30.191500] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.192127] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.192995] ? __pfx_lock_acquire+0x10/0x10 [ 30.193647] ? __pfx_mmap_region+0x10/0x10 [ 30.194291] ? security_mmap_addr+0x7d/0xa0 [ 30.194945] ? get_unmapped_area+0x1f5/0x3f0 [ 30.195619] do_mmap+0x854/0xf00 [ 30.196149] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.196750] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.197428] ksys_mmap_pgoff+0x3af/0x500 [ 30.198045] do_syscall_64+0x3f/0x90 [ 30.198635] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.199458] RIP: 0033:0x7f861d74cd82 [ 30.199933] 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 [ 30.202078] RSP: 002b:00007fff8fd22108 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.202996] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f861d74cd82 [ 30.203842] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f861cb86000 [ 30.204685] RBP: 00007f861cb86000 R08: 0000000000000009 R09: 0000000000001000 [ 30.205525] R10: 0000000000000812 R11: 0000000000000206 R12: 00005630b1e2bec0 [ 30.206373] R13: 00007fff8fd22120 R14: 00007fff8fd22150 R15: 00007fff8fd224b0 [ 30.207247] [ 30.207534] [ 30.207751] Allocated by task 213: [ 30.208181] kasan_save_stack+0x22/0x50 [ 30.208679] kasan_set_track+0x25/0x30 [ 30.209172] __kasan_slab_alloc+0x59/0x70 [ 30.209693] kmem_cache_alloc+0x16b/0x370 [ 30.210205] vm_area_dup+0x20/0x160 [ 30.210680] __split_vma+0x170/0x950 [ 30.211155] split_vma+0xc6/0x110 [ 30.211590] mprotect_fixup+0x8d2/0xb30 [ 30.212095] do_mprotect_pkey+0x87e/0xd40 [ 30.212619] __x64_sys_mprotect+0x78/0xc0 [ 30.213137] do_syscall_64+0x3f/0x90 [ 30.213611] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.214264] [ 30.214477] Freed by task 213: [ 30.214953] kasan_save_stack+0x22/0x50 [ 30.215466] kasan_set_track+0x25/0x30 [ 30.215959] kasan_save_free_info+0x2b/0x50 [ 30.216488] __kasan_slab_free+0x10a/0x190 [ 30.217017] kmem_cache_free+0x10d/0x4d0 [ 30.217530] rcu_core+0x8c8/0x2860 [ 30.217985] __do_softirq+0x1b7/0x7d4 [ 30.218461] [ 30.218697] Last potentially related work creation: [ 30.219285] kasan_save_stack+0x22/0x50 [ 30.219798] __kasan_record_aux_stack+0x8e/0xa0 [ 30.220381] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.221024] remove_vma+0x139/0x170 [ 30.221471] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.222033] do_vmi_munmap+0x1f1/0x2b0 [ 30.222523] __vm_munmap+0x138/0x3a0 [ 30.223005] __x64_sys_munmap+0x59/0x80 [ 30.223511] do_syscall_64+0x3f/0x90 [ 30.223992] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.224643] [ 30.224857] The buggy address belongs to the object at ffff88800944a570 [ 30.224857] which belongs to the cache vm_area_struct of size 168 [ 30.226325] The buggy address is located 88 bytes inside of [ 30.226325] freed 168-byte region [ffff88800944a570, ffff88800944a618) [ 30.227763] [ 30.227987] The buggy address belongs to the physical page: [ 30.228644] page:000000000293e99b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x944a [ 30.229737] memcg:ffff88800ea4ca01 [ 30.230171] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.230834] page_type: 0xffffffff() [ 30.231290] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.232226] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ea4ca01 [ 30.233142] page dumped because: kasan: bad access detected [ 30.233804] [ 30.234026] Memory state around the buggy address: [ 30.234616] ffff88800944a480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.235481] ffff88800944a500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 30.236349] >ffff88800944a580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.237207] ^ [ 30.237884] ffff88800944a600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.238782] ffff88800944a680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.239641] ================================================================== [ 30.240648] Disabling lock debugging due to kernel taint [ 32.421867] BUG: Bad rss-counter state mm:00000000164d9913 type:MM_FILEPAGES val:33 [ 32.422884] BUG: Bad rss-counter state mm:00000000164d9913 type:MM_ANONPAGES val:22 [ 32.911447] BUG: Bad rss-counter state mm:00000000c98582c7 type:MM_FILEPAGES val:33 [ 32.912429] BUG: Bad rss-counter state mm:00000000c98582c7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:36179' (ECDSA) to the list of known hosts. 2023/06/21 03:56:04 fuzzer started 2023/06/21 03:56:05 dialing manager at localhost:36067 2023/06/21 03:56:05 checking machine... 2023/06/21 03:56:05 checking revisions... [ 33.650458] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:56:05 testing simple program... [ 33.693974] cgroup: Unknown subsys name 'net' [ 33.726811] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:56:04 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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=00007ffdd72fc408 CR3=0000000005482000 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=00000000000000000000000000000000 XMM01=00007f03ac1fc510000055f036a4a790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=0000000000000001 RCX=ffffffff815342db RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffffffff81806333 RSP=ffff88801b8979e8 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000c000b R12=ffff8880087b8780 R13=ffffea0000260d00 R14=0000000000000000 R15=0000000000000003 RIP=ffffffff8153437c RFL=00000002 [-------] 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 00007fd9cbe20900 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=00007fffe352d000 CR3=000000000c9a2000 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