syzkaller login: [ 31.028153] BUG: Bad rss-counter state mm:000000007eae2d3d type:MM_FILEPAGES val:33 [ 31.029557] BUG: Bad rss-counter state mm:000000007eae2d3d type:MM_ANONPAGES val:22 [ 31.175344] ================================================================== [ 31.176239] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.177184] Read of size 8 at addr ffff888019e4a968 by task sshd/221 [ 31.177940] [ 31.178199] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.179049] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.180025] Call Trace: [ 31.180363] [ 31.180649] dump_stack_lvl+0x91/0xf0 [ 31.181141] print_report+0xcc/0x620 [ 31.181636] ? __virt_addr_valid+0x102/0x340 [ 31.182193] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.182792] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.183386] kasan_report+0xbe/0xf0 [ 31.183856] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.184463] vma_interval_tree_remove+0xc75/0xec0 [ 31.185047] vma_prepare+0xc54/0x11a0 [ 31.185515] __split_vma+0x5af/0x950 [ 31.185981] ? __pfx___split_vma+0x10/0x10 [ 31.186499] ? find_held_lock+0x2c/0x110 [ 31.187009] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.187575] ? lock_is_held_type+0x9f/0x120 [ 31.188121] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.188730] ? mtree_range_walk+0x632/0x900 [ 31.189283] ? mas_walk+0x5c7/0x7c0 [ 31.189805] do_vmi_munmap+0x1f1/0x2b0 [ 31.190291] mmap_region+0x1f9/0x2660 [ 31.190757] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.191253] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.191943] ? __pfx_lock_acquire+0x10/0x10 [ 31.192497] ? __pfx_mmap_region+0x10/0x10 [ 31.193009] ? security_mmap_addr+0x7d/0xa0 [ 31.193522] ? get_unmapped_area+0x1f5/0x3f0 [ 31.194064] do_mmap+0x854/0xf00 [ 31.194494] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.194979] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.195526] ksys_mmap_pgoff+0x3af/0x500 [ 31.196021] do_syscall_64+0x3f/0x90 [ 31.196488] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.197119] RIP: 0033:0x7f8df7d88d82 [ 31.197565] 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 [ 31.199642] RSP: 002b:00007ffcdc3883a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.200521] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8df7d88d82 [ 31.201346] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8df71c2000 [ 31.202176] RBP: 00007f8df71c2000 R08: 0000000000000009 R09: 0000000000001000 [ 31.202974] R10: 0000000000000812 R11: 0000000000000206 R12: 00005572c8fd3f70 [ 31.203773] R13: 00007ffcdc3883c0 R14: 00007ffcdc3883f0 R15: 00007ffcdc388750 [ 31.204590] [ 31.204879] [ 31.205092] Allocated by task 214: [ 31.205508] kasan_save_stack+0x22/0x50 [ 31.206010] kasan_set_track+0x25/0x30 [ 31.206493] __kasan_slab_alloc+0x59/0x70 [ 31.207002] kmem_cache_alloc+0x16b/0x370 [ 31.207503] vm_area_dup+0x20/0x160 [ 31.207945] __split_vma+0x170/0x950 [ 31.208395] split_vma+0xc6/0x110 [ 31.208824] mprotect_fixup+0x8d2/0xb30 [ 31.209318] do_mprotect_pkey+0x87e/0xd40 [ 31.209853] __x64_sys_mprotect+0x78/0xc0 [ 31.210365] do_syscall_64+0x3f/0x90 [ 31.210830] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.211452] [ 31.211666] Freed by task 214: [ 31.212048] kasan_save_stack+0x22/0x50 [ 31.212533] kasan_set_track+0x25/0x30 [ 31.213037] kasan_save_free_info+0x2b/0x50 [ 31.213550] __kasan_slab_free+0x10a/0x190 [ 31.214073] kmem_cache_free+0x10d/0x4d0 [ 31.214570] rcu_core+0x8c8/0x2860 [ 31.215000] __do_softirq+0x1b7/0x7d4 [ 31.215461] [ 31.215669] Last potentially related work creation: [ 31.216239] kasan_save_stack+0x22/0x50 [ 31.216867] __kasan_record_aux_stack+0x8e/0xa0 [ 31.217435] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.218079] remove_vma+0x139/0x170 [ 31.218509] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.219038] do_vmi_munmap+0x1f1/0x2b0 [ 31.219510] __vm_munmap+0x138/0x3a0 [ 31.219956] __x64_sys_munmap+0x59/0x80 [ 31.220426] do_syscall_64+0x3f/0x90 [ 31.220874] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.221479] [ 31.221703] The buggy address belongs to the object at ffff888019e4a910 [ 31.221703] which belongs to the cache vm_area_struct of size 168 [ 31.223142] The buggy address is located 88 bytes inside of [ 31.223142] freed 168-byte region [ffff888019e4a910, ffff888019e4a9b8) [ 31.224550] [ 31.224764] The buggy address belongs to the physical page: [ 31.225419] page:00000000ccb81984 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19e4a [ 31.226503] memcg:ffff88800cfccc01 [ 31.226925] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.227569] page_type: 0xffffffff() [ 31.228014] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.228918] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cfccc01 [ 31.229831] page dumped because: kasan: bad access detected [ 31.230483] [ 31.230698] Memory state around the buggy address: [ 31.231279] ffff888019e4a800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 31.232158] ffff888019e4a880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 31.233003] >ffff888019e4a900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.233857] ^ [ 31.234624] ffff888019e4a980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 31.235468] ffff888019e4aa00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.236303] ================================================================== [ 31.237493] Disabling lock debugging due to kernel taint [ 33.181052] BUG: Bad rss-counter state mm:00000000c1490f72 type:MM_FILEPAGES val:33 [ 33.182262] BUG: Bad rss-counter state mm:00000000c1490f72 type:MM_ANONPAGES val:22 [ 33.708219] BUG: Bad rss-counter state mm:0000000061bee403 type:MM_FILEPAGES val:33 [ 33.709380] BUG: Bad rss-counter state mm:0000000061bee403 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:5551' (ECDSA) to the list of known hosts. 2023/06/20 12:50:10 fuzzer started 2023/06/20 12:50:11 dialing manager at localhost:36067 2023/06/20 12:50:11 checking machine... 2023/06/20 12:50:11 checking revisions... [ 34.354809] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:50:11 testing simple program... [ 34.400957] cgroup: Unknown subsys name 'net' [ 34.438792] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:50:10 Registers: info registers vcpu 0 RAX=ffffffff816cb53c RBX=ffffffff85dee9ac RCX=ffffffff816cb50a RDX=0000000000000000 RSI=ffffffff86121ccc RDI=ffffffff85dee99c RBP=ffffffff85dee99c RSP=ffff88801a0af4d8 R8 =ffffffff86121ccc R9 =ffff88801a0af5d0 R10=0000000000038001 R11=000000000001cff6 R12=ffffffff85dee9a8 R13=ffffffff85dee99c R14=ffffffff85dee99c R15=dffffc0000000000 RIP=ffffffff8112fca2 RFL=00000216 [----AP-] 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 00007fcfd5420900 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=00007fcfd59d5650 CR3=000000000e5ae000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88801a0afb18 RCX=0000000000000000 RDX=0000000000000070 RSI=0000000000000000 RDI=ffff88801a0afa80 RBP=ffff88800f2c51c0 RSP=ffff88801a0afa28 R8 =0000000000000001 R9 =0000000000000000 R10=ffff88801a0afa80 R11=00000000000b6a61 R12=0000000000000000 R13=ffff88801a0afaa8 R14=ffff88800f2c51c0 R15=ffff88801a0afa80 RIP=ffffffff8451340a RFL=00000247 [---Z-PC] 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 00007fcfd5420900 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=00007fcfd59d7618 CR3=000000000e5ae000 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