syzkaller login: [ 81.293373] BUG: Bad rss-counter state mm:000000009f5e628a type:MM_FILEPAGES val:33 [ 81.294598] BUG: Bad rss-counter state mm:000000009f5e628a type:MM_ANONPAGES val:22 [ 81.373518] ================================================================== [ 81.374440] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 81.375381] Read of size 8 at addr ffff88800e2ed058 by task sshd/220 [ 81.376156] [ 81.376378] CPU: 0 PID: 220 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 81.377515] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 81.378526] Call Trace: [ 81.378855] [ 81.379145] dump_stack_lvl+0x91/0xf0 [ 81.379637] print_report+0xcc/0x620 [ 81.380125] ? __virt_addr_valid+0x102/0x340 [ 81.380688] ? vma_interval_tree_remove+0xc75/0xec0 [ 81.381308] ? vma_interval_tree_remove+0xc75/0xec0 [ 81.381950] kasan_report+0xbe/0xf0 [ 81.382435] ? vma_interval_tree_remove+0xc75/0xec0 [ 81.383058] vma_interval_tree_remove+0xc75/0xec0 [ 81.383654] vma_prepare+0xc54/0x11a0 [ 81.384137] __split_vma+0x5af/0x950 [ 81.384611] ? __pfx___split_vma+0x10/0x10 [ 81.385141] ? find_held_lock+0x2c/0x110 [ 81.385664] do_vmi_align_munmap+0x2ba/0x11f0 [ 81.386245] ? lock_is_held_type+0x9f/0x120 [ 81.386788] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 81.387394] ? mtree_range_walk+0x632/0x900 [ 81.387950] ? mas_walk+0x5c7/0x7c0 [ 81.388430] do_vmi_munmap+0x1f1/0x2b0 [ 81.388920] mmap_region+0x1f9/0x2660 [ 81.389404] ? vm_mmap_pgoff+0x15c/0x3a0 [ 81.389941] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 81.390661] ? __pfx_lock_acquire+0x10/0x10 [ 81.391195] ? __pfx_mmap_region+0x10/0x10 [ 81.391732] ? security_mmap_addr+0x7d/0xa0 [ 81.392261] ? get_unmapped_area+0x1f5/0x3f0 [ 81.392810] do_mmap+0x854/0xf00 [ 81.393252] vm_mmap_pgoff+0x1a6/0x3a0 [ 81.393749] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 81.394326] ksys_mmap_pgoff+0x3af/0x500 [ 81.394847] do_syscall_64+0x3f/0x90 [ 81.395320] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 81.395975] RIP: 0033:0x7fc3ef71dd82 [ 81.396439] 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 [ 81.398618] RSP: 002b:00007fffc7003768 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 81.399549] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc3ef71dd82 [ 81.400406] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc3eeb57000 [ 81.401260] RBP: 00007fc3eeb57000 R08: 0000000000000009 R09: 0000000000001000 [ 81.402123] R10: 0000000000000812 R11: 0000000000000206 R12: 00005573b0cc9ec0 [ 81.402967] R13: 00007fffc7003780 R14: 00007fffc70037b0 R15: 00007fffc7003b10 [ 81.403821] [ 81.404122] [ 81.404344] Allocated by task 213: [ 81.404775] kasan_save_stack+0x22/0x50 [ 81.405278] kasan_set_track+0x25/0x30 [ 81.405772] __kasan_slab_alloc+0x59/0x70 [ 81.406317] kmem_cache_alloc+0x16b/0x370 [ 81.406832] vm_area_dup+0x20/0x160 [ 81.407286] __split_vma+0x170/0x950 [ 81.407767] split_vma+0xc6/0x110 [ 81.408218] mprotect_fixup+0x8d2/0xb30 [ 81.408717] do_mprotect_pkey+0x87e/0xd40 [ 81.409244] __x64_sys_mprotect+0x78/0xc0 [ 81.409773] do_syscall_64+0x3f/0x90 [ 81.410255] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 81.410906] [ 81.411122] Freed by task 213: [ 81.411513] kasan_save_stack+0x22/0x50 [ 81.412013] kasan_set_track+0x25/0x30 [ 81.412508] kasan_save_free_info+0x2b/0x50 [ 81.413053] __kasan_slab_free+0x10a/0x190 [ 81.413590] kmem_cache_free+0x10d/0x4d0 [ 81.414107] rcu_core+0x8c8/0x2860 [ 81.414548] __do_softirq+0x1b7/0x7d4 [ 81.415026] [ 81.415239] Last potentially related work creation: [ 81.415845] kasan_save_stack+0x22/0x50 [ 81.416351] __kasan_record_aux_stack+0x8e/0xa0 [ 81.416925] __call_rcu_common.constprop.0+0x6a/0xb90 [ 81.417573] remove_vma+0x139/0x170 [ 81.418046] do_vmi_align_munmap+0xd4a/0x11f0 [ 81.418606] do_vmi_munmap+0x1f1/0x2b0 [ 81.419101] __vm_munmap+0x138/0x3a0 [ 81.419563] __x64_sys_munmap+0x59/0x80 [ 81.420066] do_syscall_64+0x3f/0x90 [ 81.420536] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 81.421175] [ 81.421390] Second to last potentially related work creation: [ 81.422089] kasan_save_stack+0x22/0x50 [ 81.422588] __kasan_record_aux_stack+0x8e/0xa0 [ 81.423170] __call_rcu_common.constprop.0+0x6a/0xb90 [ 81.423813] remove_vma+0x139/0x170 [ 81.424265] do_vmi_align_munmap+0xd4a/0x11f0 [ 81.424824] do_vmi_munmap+0x1f1/0x2b0 [ 81.425314] mmap_region+0x1f9/0x2660 [ 81.425787] do_mmap+0x854/0xf00 [ 81.426231] vm_mmap_pgoff+0x1a6/0x3a0 [ 81.426715] ksys_mmap_pgoff+0x3af/0x500 [ 81.427213] do_syscall_64+0x3f/0x90 [ 81.427684] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 81.428319] [ 81.428533] The buggy address belongs to the object at ffff88800e2ed000 [ 81.428533] which belongs to the cache vm_area_struct of size 168 [ 81.430029] The buggy address is located 88 bytes inside of [ 81.430029] freed 168-byte region [ffff88800e2ed000, ffff88800e2ed0a8) [ 81.431436] [ 81.431653] The buggy address belongs to the physical page: [ 81.432316] page:0000000051e2ee7c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe2ed [ 81.433411] memcg:ffff888009ba7a01 [ 81.433847] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 81.434555] page_type: 0xffffffff() [ 81.435005] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 81.435929] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009ba7a01 [ 81.436840] page dumped because: kasan: bad access detected [ 81.437504] [ 81.437719] Memory state around the buggy address: [ 81.438326] ffff88800e2ecf00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 81.439187] ffff88800e2ecf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 81.440043] >ffff88800e2ed000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 81.440901] ^ [ 81.441633] ffff88800e2ed080: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 [ 81.442495] ffff88800e2ed100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 81.443350] ================================================================== [ 81.444316] Disabling lock debugging due to kernel taint [ 83.485171] BUG: Bad rss-counter state mm:000000009d156414 type:MM_FILEPAGES val:33 [ 83.486377] BUG: Bad rss-counter state mm:000000009d156414 type:MM_ANONPAGES val:22 [ 83.971285] BUG: Bad rss-counter state mm:00000000fc82cc36 type:MM_FILEPAGES val:33 [ 83.972331] BUG: Bad rss-counter state mm:00000000fc82cc36 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:10132' (ECDSA) to the list of known hosts. 2023/06/20 01:20:25 fuzzer started 2023/06/20 01:20:25 dialing manager at localhost:44161 2023/06/20 01:20:25 checking machine... 2023/06/20 01:20:25 checking revisions... [ 84.649020] kmemleak: Automatic memory scanning thread ended 2023/06/20 01:20:26 testing simple program... [ 84.691704] cgroup: Unknown subsys name 'net' [ 84.735242] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:19:36 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007fb201006010 CR3=000000000da82000 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=2035323a30323a3130203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035323a30323a3130203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=000000000296501b RBX=000000003f9cb091 RCX=ffff88800cc172f8 RDX=000000000000000b RSI=0000000000000004 RDI=00000000a9fe7933 RBP=0000000000000100 RSP=ffff88800cc17228 R8 =00000000897d6e85 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000001 R13=0000000000000800 R14=ffff88800cc172b0 R15=000000000000000b RIP=ffffffff82270ee9 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 00007f991a08f900 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=00007f991a06e020 CR3=000000000e2e8000 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