syzkaller login: [ 48.065777] BUG: Bad rss-counter state mm:000000001c63d620 type:MM_FILEPAGES val:33 [ 48.066545] BUG: Bad rss-counter state mm:000000001c63d620 type:MM_ANONPAGES val:22 [ 48.229689] ================================================================== [ 48.230690] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 48.231757] Read of size 8 at addr ffff88800e41d880 by task sshd/218 [ 48.232699] [ 48.232940] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 48.233922] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 48.235034] Call Trace: [ 48.235392] [ 48.235703] dump_stack_lvl+0x91/0xf0 [ 48.236194] print_report+0xcc/0x620 [ 48.236680] ? __virt_addr_valid+0x102/0x340 [ 48.237239] ? vma_interval_tree_remove+0xc75/0xec0 [ 48.237868] ? vma_interval_tree_remove+0xc75/0xec0 [ 48.238486] kasan_report+0xbe/0xf0 [ 48.238958] ? vma_interval_tree_remove+0xc75/0xec0 [ 48.239587] vma_interval_tree_remove+0xc75/0xec0 [ 48.240184] vma_prepare+0xc54/0x11a0 [ 48.240676] __split_vma+0x5af/0x950 [ 48.241152] ? __pfx___split_vma+0x10/0x10 [ 48.241708] ? find_held_lock+0x2c/0x110 [ 48.242233] do_vmi_align_munmap+0x2ba/0x11f0 [ 48.242800] ? lock_is_held_type+0x9f/0x120 [ 48.243338] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 48.243949] ? mtree_range_walk+0x632/0x900 [ 48.244506] ? mas_walk+0x5c7/0x7c0 [ 48.244988] do_vmi_munmap+0x1f1/0x2b0 [ 48.245498] mmap_region+0x1f9/0x2660 [ 48.245980] ? vm_mmap_pgoff+0x15c/0x3a0 [ 48.246497] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 48.247222] ? __pfx_lock_acquire+0x10/0x10 [ 48.247759] ? __pfx_mmap_region+0x10/0x10 [ 48.248298] ? security_mmap_addr+0x7d/0xa0 [ 48.248840] ? get_unmapped_area+0x1f5/0x3f0 [ 48.249388] do_mmap+0x854/0xf00 [ 48.249846] vm_mmap_pgoff+0x1a6/0x3a0 [ 48.250338] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 48.250910] ksys_mmap_pgoff+0x3af/0x500 [ 48.251415] do_syscall_64+0x3f/0x90 [ 48.251891] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 48.252544] RIP: 0033:0x7fc782419d82 [ 48.253001] 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 [ 48.255153] RSP: 002b:00007ffd006c3c68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 48.256075] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc782419d82 [ 48.256936] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc781853000 [ 48.257787] RBP: 00007fc781853000 R08: 0000000000000009 R09: 0000000000001000 [ 48.258638] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c4ac41eec0 [ 48.259488] R13: 00007ffd006c3c80 R14: 00007ffd006c3cb0 R15: 00007ffd006c4010 [ 48.260351] [ 48.260642] [ 48.260857] Allocated by task 211: [ 48.261284] kasan_save_stack+0x22/0x50 [ 48.261814] kasan_set_track+0x25/0x30 [ 48.262310] __kasan_slab_alloc+0x59/0x70 [ 48.262833] kmem_cache_alloc+0x16b/0x370 [ 48.263346] vm_area_dup+0x20/0x160 [ 48.263803] __split_vma+0x170/0x950 [ 48.264271] split_vma+0xc6/0x110 [ 48.264713] mprotect_fixup+0x8d2/0xb30 [ 48.265212] do_mprotect_pkey+0x87e/0xd40 [ 48.265752] __x64_sys_mprotect+0x78/0xc0 [ 48.266269] do_syscall_64+0x3f/0x90 [ 48.266747] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 48.267394] [ 48.267614] Freed by task 211: [ 48.268009] kasan_save_stack+0x22/0x50 [ 48.268507] kasan_set_track+0x25/0x30 [ 48.268998] kasan_save_free_info+0x2b/0x50 [ 48.269540] __kasan_slab_free+0x10a/0x190 [ 48.270076] kmem_cache_free+0x10d/0x4d0 [ 48.270589] rcu_core+0x8c8/0x2860 [ 48.271037] __do_softirq+0x1b7/0x7d4 [ 48.271519] [ 48.271738] Last potentially related work creation: [ 48.272325] kasan_save_stack+0x22/0x50 [ 48.272834] __kasan_record_aux_stack+0x8e/0xa0 [ 48.273402] __call_rcu_common.constprop.0+0x6a/0xb90 [ 48.274069] remove_vma+0x139/0x170 [ 48.274515] do_vmi_align_munmap+0xd4a/0x11f0 [ 48.275085] do_vmi_munmap+0x1f1/0x2b0 [ 48.275570] __vm_munmap+0x138/0x3a0 [ 48.276045] __x64_sys_munmap+0x59/0x80 [ 48.276541] do_syscall_64+0x3f/0x90 [ 48.277015] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 48.277669] [ 48.277883] The buggy address belongs to the object at ffff88800e41d828 [ 48.277883] which belongs to the cache vm_area_struct of size 168 [ 48.279356] The buggy address is located 88 bytes inside of [ 48.279356] freed 168-byte region [ffff88800e41d828, ffff88800e41d8d0) [ 48.280749] [ 48.280963] The buggy address belongs to the physical page: [ 48.281633] page:00000000ca0fce8d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe41d [ 48.282713] memcg:ffff8880144c3901 [ 48.283141] flags: 0x100000000000200(slab|node=0|zone=1) [ 48.283793] page_type: 0xffffffff() [ 48.284239] raw: 0100000000000200 ffff88800879fc80 ffffea00003a6440 dead000000000002 [ 48.285160] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880144c3901 [ 48.286097] page dumped because: kasan: bad access detected [ 48.286768] [ 48.286986] Memory state around the buggy address: [ 48.287575] ffff88800e41d780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 48.288437] ffff88800e41d800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 48.289304] >ffff88800e41d880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 48.290164] ^ [ 48.290575] ffff88800e41d900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 48.291427] ffff88800e41d980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc 00 [ 48.292275] ================================================================== [ 48.293321] Disabling lock debugging due to kernel taint [ 49.883865] BUG: Bad rss-counter state mm:000000007fd2f358 type:MM_FILEPAGES val:33 [ 49.884606] BUG: Bad rss-counter state mm:000000007fd2f358 type:MM_ANONPAGES val:22 [ 50.181675] BUG: Bad rss-counter state mm:00000000bf54f627 type:MM_FILEPAGES val:33 [ 50.182446] BUG: Bad rss-counter state mm:00000000bf54f627 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:63841' (ECDSA) to the list of known hosts. 2023/06/19 13:07:30 fuzzer started 2023/06/19 13:07:30 dialing manager at localhost:44161 2023/06/19 13:07:30 checking machine... 2023/06/19 13:07:30 checking revisions... [ 50.747249] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:07:30 testing simple program... [ 50.792448] cgroup: Unknown subsys name 'net' [ 50.842552] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:07:11 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=00007ffc61a90cb8 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=00007f29f7b45510000055af536f5790 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=dffffc0000000000 RBX=ffff88800fbb7b68 RCX=0000000000000001 RDX=1ffff11001f76f81 RSI=ffffffff8185b993 RDI=ffff88800fbb7b74 RBP=ffff88800fbb7c08 RSP=ffff88800fbb7a80 R8 =0000000000000001 R9 =ffff88800fbb7ae0 R10=0000000000038001 R11=0000000000024940 R12=ffff88800fbb7b68 R13=0000000000000000 R14=ffff888018330000 R15=dffffc0000000000 RIP=ffffffff813ad4f7 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 00007efd7c268900 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=00007ffe7aa49000 CR3=0000000016a16000 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=563412feff00545000000000000080fe XMM01=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000