syzkaller login: [ 31.495859] BUG: Bad rss-counter state mm:000000006d6bd995 type:MM_FILEPAGES val:33 [ 31.497956] BUG: Bad rss-counter state mm:000000006d6bd995 type:MM_ANONPAGES val:22 [ 31.657317] ================================================================== [ 31.658602] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.659849] Read of size 8 at addr ffff888015e696b0 by task sshd/221 [ 31.660809] [ 31.661077] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.662146] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.663317] Call Trace: [ 31.663711] [ 31.664065] dump_stack_lvl+0x91/0xf0 [ 31.664666] print_report+0xcc/0x620 [ 31.665256] ? __virt_addr_valid+0x102/0x340 [ 31.665927] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.666711] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.667477] kasan_report+0xbe/0xf0 [ 31.668049] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.668791] vma_interval_tree_remove+0xc75/0xec0 [ 31.669529] vma_prepare+0xc54/0x11a0 [ 31.670126] __split_vma+0x5af/0x950 [ 31.670743] ? __pfx___split_vma+0x10/0x10 [ 31.671402] ? find_held_lock+0x2c/0x110 [ 31.672028] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.672712] ? lock_is_held_type+0x9f/0x120 [ 31.673388] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.674132] ? mtree_range_walk+0x632/0x900 [ 31.674825] ? mas_walk+0x5c7/0x7c0 [ 31.675412] do_vmi_munmap+0x1f1/0x2b0 [ 31.676007] mmap_region+0x1f9/0x2660 [ 31.676602] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.677224] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.678102] ? __pfx_lock_acquire+0x10/0x10 [ 31.678769] ? __pfx_mmap_region+0x10/0x10 [ 31.679418] ? security_mmap_addr+0x7d/0xa0 [ 31.680067] ? get_unmapped_area+0x1f5/0x3f0 [ 31.680752] do_mmap+0x854/0xf00 [ 31.681282] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.681875] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.682578] ksys_mmap_pgoff+0x3af/0x500 [ 31.683201] do_syscall_64+0x3f/0x90 [ 31.683792] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.684578] RIP: 0033:0x7fa6a8a1fd82 [ 31.685146] 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 [ 31.687801] RSP: 002b:00007ffe7dda5b88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.688922] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa6a8a1fd82 [ 31.689969] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa6a7e59000 [ 31.691011] RBP: 00007fa6a7e59000 R08: 0000000000000009 R09: 0000000000001000 [ 31.692066] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559b8eb0dec0 [ 31.693123] R13: 00007ffe7dda5ba0 R14: 00007ffe7dda5bd0 R15: 00007ffe7dda5f30 [ 31.694186] [ 31.694565] [ 31.694834] Allocated by task 214: [ 31.695360] kasan_save_stack+0x22/0x50 [ 31.695958] kasan_set_track+0x25/0x30 [ 31.696549] __kasan_slab_alloc+0x59/0x70 [ 31.697183] kmem_cache_alloc+0x16b/0x370 [ 31.697805] vm_area_dup+0x20/0x160 [ 31.698375] __split_vma+0x170/0x950 [ 31.698960] split_vma+0xc6/0x110 [ 31.699495] mprotect_fixup+0x8d2/0xb30 [ 31.700112] do_mprotect_pkey+0x87e/0xd40 [ 31.700754] __x64_sys_mprotect+0x78/0xc0 [ 31.701469] do_syscall_64+0x3f/0x90 [ 31.702059] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.702865] [ 31.703122] Freed by task 214: [ 31.703607] kasan_save_stack+0x22/0x50 [ 31.704232] kasan_set_track+0x25/0x30 [ 31.704830] kasan_save_free_info+0x2b/0x50 [ 31.705481] __kasan_slab_free+0x10a/0x190 [ 31.706119] kmem_cache_free+0x10d/0x4d0 [ 31.706726] rcu_core+0x8c8/0x2860 [ 31.707269] __do_softirq+0x1b7/0x7d4 [ 31.707863] [ 31.708131] Last potentially related work creation: [ 31.708862] kasan_save_stack+0x22/0x50 [ 31.709482] __kasan_record_aux_stack+0x8e/0xa0 [ 31.710186] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.710973] remove_vma+0x139/0x170 [ 31.711523] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.712201] do_vmi_munmap+0x1f1/0x2b0 [ 31.712798] __vm_munmap+0x138/0x3a0 [ 31.713359] __x64_sys_munmap+0x59/0x80 [ 31.713970] do_syscall_64+0x3f/0x90 [ 31.714554] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.715334] [ 31.715597] Second to last potentially related work creation: [ 31.716441] kasan_save_stack+0x22/0x50 [ 31.717048] __kasan_record_aux_stack+0x8e/0xa0 [ 31.717746] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.718549] remove_vma+0x139/0x170 [ 31.719092] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.719773] do_vmi_munmap+0x1f1/0x2b0 [ 31.720371] mmap_region+0x1f9/0x2660 [ 31.720960] do_mmap+0x854/0xf00 [ 31.721478] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.722050] ksys_mmap_pgoff+0x3af/0x500 [ 31.722662] do_syscall_64+0x3f/0x90 [ 31.723248] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.724020] [ 31.724275] The buggy address belongs to the object at ffff888015e69658 [ 31.724275] which belongs to the cache vm_area_struct of size 168 [ 31.726091] The buggy address is located 88 bytes inside of [ 31.726091] freed 168-byte region [ffff888015e69658, ffff888015e69700) [ 31.727865] [ 31.728127] The buggy address belongs to the physical page: [ 31.728948] page:00000000077efbd2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15e69 [ 31.730330] memcg:ffff888015ca8101 [ 31.730866] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.731668] page_type: 0xffffffff() [ 31.732233] raw: 0100000000000200 ffff8880087a0c80 ffffea0000679400 dead000000000004 [ 31.733364] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015ca8101 [ 31.734511] page dumped because: kasan: bad access detected [ 31.735327] [ 31.735589] Memory state around the buggy address: [ 31.736318] ffff888015e69580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.737397] ffff888015e69600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.738498] >ffff888015e69680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.739453] ^ [ 31.740041] ffff888015e69700: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 [ 31.740887] ffff888015e69780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 31.741737] ================================================================== [ 31.742681] Disabling lock debugging due to kernel taint [ 34.295803] BUG: Bad rss-counter state mm:00000000690a939d type:MM_FILEPAGES val:33 [ 34.297029] BUG: Bad rss-counter state mm:00000000690a939d type:MM_ANONPAGES val:22 [ 34.773063] BUG: Bad rss-counter state mm:000000008f9ab55b type:MM_FILEPAGES val:33 [ 34.774108] BUG: Bad rss-counter state mm:000000008f9ab55b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62239' (ECDSA) to the list of known hosts. 2023/06/20 10:57:17 fuzzer started 2023/06/20 10:57:17 dialing manager at localhost:36067 2023/06/20 10:57:17 checking machine... 2023/06/20 10:57:17 checking revisions... [ 35.489461] kmemleak: Automatic memory scanning thread ended 2023/06/20 10:57:17 testing simple program... [ 35.551219] cgroup: Unknown subsys name 'net' [ 35.624211] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:57:17 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=ffff888008c04000 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=0000555fa3c2e290 CR3=000000000e2be000 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=2037313a37353a3031203032206e754a XMM01=657463656e6e6f63736944203a5d3033 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3033325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036313a37353a3031203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88801c67f8b0 RCX=0000000000000001 RDX=1ffff110038cff16 RSI=ffffffff81ef573a RDI=ffff88801c67f8bc RBP=0000000000000008 RSP=ffff88801c67f7c8 R8 =0000000000000001 R9 =ffff88801c67f828 R10=0000000000038001 R11=00000000000397f4 R12=ffff88801c67f8b0 R13=0000000000000000 R14=ffff88800ff70000 R15=0000000000092cc0 RIP=ffffffff813ad525 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 00007f1a42976900 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=00007f1a42f2d618 CR3=0000000016a9e000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000