syzkaller login: [ 39.205405] BUG: Bad rss-counter state mm:00000000fb263393 type:MM_FILEPAGES val:33 [ 39.207651] BUG: Bad rss-counter state mm:00000000fb263393 type:MM_ANONPAGES val:22 [ 39.254868] ================================================================== [ 39.255531] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.256242] Read of size 8 at addr ffff88800df00c20 by task sshd/218 [ 39.256771] [ 39.256927] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.257537] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.258236] Call Trace: [ 39.258469] [ 39.258671] dump_stack_lvl+0x91/0xf0 [ 39.259022] print_report+0xcc/0x620 [ 39.259383] ? __virt_addr_valid+0x102/0x340 [ 39.259775] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.260639] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.261135] kasan_report+0xbe/0xf0 [ 39.261528] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.262027] vma_interval_tree_remove+0xc75/0xec0 [ 39.262521] vma_prepare+0xc54/0x11a0 [ 39.262905] __split_vma+0x5af/0x950 [ 39.263283] ? __pfx___split_vma+0x10/0x10 [ 39.263709] ? find_held_lock+0x2c/0x110 [ 39.265611] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.266121] ? lock_is_held_type+0x9f/0x120 [ 39.266578] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.267131] ? mtree_range_walk+0x632/0x900 [ 39.267574] ? mas_walk+0x5c7/0x7c0 [ 39.267963] do_vmi_munmap+0x1f1/0x2b0 [ 39.268512] mmap_region+0x1f9/0x2660 [ 39.268882] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.269339] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.269906] ? __pfx_lock_acquire+0x10/0x10 [ 39.270357] ? __pfx_mmap_region+0x10/0x10 [ 39.270759] ? security_mmap_addr+0x7d/0xa0 [ 39.271205] ? get_unmapped_area+0x1f5/0x3f0 [ 39.271652] do_mmap+0x854/0xf00 [ 39.271982] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.274979] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.275490] ksys_mmap_pgoff+0x3af/0x500 [ 39.275908] do_syscall_64+0x3f/0x90 [ 39.276322] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.276749] RIP: 0033:0x7fada41e0d82 [ 39.277107] 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 [ 39.278610] RSP: 002b:00007ffca1cdbdd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.279292] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fada41e0d82 [ 39.279903] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fada361a000 [ 39.280552] RBP: 00007fada361a000 R08: 0000000000000009 R09: 0000000000001000 [ 39.281221] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e6ed7cdf70 [ 39.281800] R13: 00007ffca1cdbdf0 R14: 00007ffca1cdbe20 R15: 00007ffca1cdc180 [ 39.282419] [ 39.282615] [ 39.282757] Allocated by task 211: [ 39.283040] kasan_save_stack+0x22/0x50 [ 39.283492] kasan_set_track+0x25/0x30 [ 39.283817] __kasan_slab_alloc+0x59/0x70 [ 39.288306] kmem_cache_alloc+0x16b/0x370 [ 39.288703] vm_area_dup+0x20/0x160 [ 39.289020] __split_vma+0x170/0x950 [ 39.289393] split_vma+0xc6/0x110 [ 39.289743] mprotect_fixup+0x8d2/0xb30 [ 39.290156] do_mprotect_pkey+0x87e/0xd40 [ 39.290585] __x64_sys_mprotect+0x78/0xc0 [ 39.291013] do_syscall_64+0x3f/0x90 [ 39.291347] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.291788] [ 39.291935] Freed by task 211: [ 39.292347] kasan_save_stack+0x22/0x50 [ 39.292674] kasan_set_track+0x25/0x30 [ 39.292993] kasan_save_free_info+0x2b/0x50 [ 39.293363] __kasan_slab_free+0x10a/0x190 [ 39.293705] kmem_cache_free+0x10d/0x4d0 [ 39.294034] rcu_core+0x8c8/0x2860 [ 39.294459] __do_softirq+0x1b7/0x7d4 [ 39.295003] [ 39.295385] Last potentially related work creation: [ 39.296579] kasan_save_stack+0x22/0x50 [ 39.297448] __kasan_record_aux_stack+0x8e/0xa0 [ 39.298402] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.299299] remove_vma+0x139/0x170 [ 39.299658] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.300014] do_vmi_munmap+0x1f1/0x2b0 [ 39.300389] __vm_munmap+0x138/0x3a0 [ 39.300690] __x64_sys_munmap+0x59/0x80 [ 39.301008] do_syscall_64+0x3f/0x90 [ 39.301313] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.301808] [ 39.301947] Second to last potentially related work creation: [ 39.302437] kasan_save_stack+0x22/0x50 [ 39.302794] __kasan_record_aux_stack+0x8e/0xa0 [ 39.303193] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.303637] remove_vma+0x139/0x170 [ 39.303960] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.304384] do_vmi_munmap+0x1f1/0x2b0 [ 39.304759] mmap_region+0x1f9/0x2660 [ 39.305151] do_mmap+0x854/0xf00 [ 39.305465] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.305780] ksys_mmap_pgoff+0x3af/0x500 [ 39.306130] do_syscall_64+0x3f/0x90 [ 39.306483] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.307000] [ 39.307141] The buggy address belongs to the object at ffff88800df00bc8 [ 39.307141] which belongs to the cache vm_area_struct of size 168 [ 39.308262] The buggy address is located 88 bytes inside of [ 39.308262] freed 168-byte region [ffff88800df00bc8, ffff88800df00c70) [ 39.309223] [ 39.309368] The buggy address belongs to the physical page: [ 39.309792] page:000000003b603d1d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdf00 [ 39.310566] memcg:ffff88800df57901 [ 39.310872] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 39.311376] page_type: 0xffffffff() [ 39.311700] raw: 0100000000000200 ffff88800879fc80 ffffea0000619340 dead000000000003 [ 39.312432] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800df57901 [ 39.313022] page dumped because: kasan: bad access detected [ 39.313509] [ 39.313654] Memory state around the buggy address: [ 39.314033] ffff88800df00b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.314650] ffff88800df00b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 39.315236] >ffff88800df00c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 39.315800] ^ [ 39.316268] ffff88800df00c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 39.316895] ffff88800df00d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 39.317460] ================================================================== [ 39.318178] Disabling lock debugging due to kernel taint [ 42.041142] BUG: Bad rss-counter state mm:00000000a173cbde type:MM_FILEPAGES val:33 [ 42.041774] BUG: Bad rss-counter state mm:00000000a173cbde type:MM_ANONPAGES val:22 [ 42.591828] BUG: Bad rss-counter state mm:00000000a1a49a0b type:MM_FILEPAGES val:33 [ 42.592557] BUG: Bad rss-counter state mm:00000000a1a49a0b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:34331' (ECDSA) to the list of known hosts. 2023/06/20 10:34:57 fuzzer started 2023/06/20 10:34:57 dialing manager at localhost:44161 2023/06/20 10:34:57 checking machine... 2023/06/20 10:34:57 checking revisions... 2023/06/20 10:34:58 testing simple program... [ 43.196837] kmemleak: Automatic memory scanning thread ended [ 43.241892] cgroup: Unknown subsys name 'net' [ 43.324249] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:34:56 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce09a50 RCX=0000000000000001 RDX=1ffff1100d9c134a RSI=ffff88806ce09f50 RDI=ffff88806ce09a50 RBP=ffff88806ce09ae8 RSP=ffff88806ce09a38 R8 =0000000000000001 R9 =ffff88806ce09a90 R10=0000000000038001 R11=000000000000fdc6 R12=ffff88806ce09b18 R13=0000000000000000 R14=ffff88800f1c0000 R15=ffff88800dbba380 RIP=ffffffff8113037f 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 00007fbb8e34b900 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=00007ffd0daa8000 CR3=000000000c7e8000 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007f2197b51570 CR3=000000000c4f0000 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=b5bf8e36fa034ba415444e83164fb4cc XMM02=ec2efd57dc4c00df0000000000120b38 XMM03=421be6fb478e37cd0000000000120c08 XMM04=0783ca0be9b20ebf00000000000ae988 XMM05=19e9129bd510f2350000000000135e98 XMM06=4fda316b135da52b0000000000135d20 XMM07=e042d86d42eb936e0000000000124a48 XMM08=421be6fb478e37cd0000000000120c08 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000