syzkaller login: [ 38.964085] sshd (213) used greatest stack depth: 24128 bytes left [ 38.965517] BUG: Bad rss-counter state mm:000000001725101d type:MM_FILEPAGES val:33 [ 38.967179] BUG: Bad rss-counter state mm:000000001725101d type:MM_ANONPAGES val:22 [ 39.126514] ================================================================== [ 39.127486] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.128442] Read of size 8 at addr ffff88800e3c0798 by task sshd/220 [ 39.129400] [ 39.129625] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.130520] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.131528] Call Trace: [ 39.131847] [ 39.132121] dump_stack_lvl+0x91/0xf0 [ 39.132610] print_report+0xcc/0x620 [ 39.133094] ? __virt_addr_valid+0x102/0x340 [ 39.133670] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.134294] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.134915] kasan_report+0xbe/0xf0 [ 39.135401] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.136024] vma_interval_tree_remove+0xc75/0xec0 [ 39.136639] vma_prepare+0xc54/0x11a0 [ 39.137138] __split_vma+0x5af/0x950 [ 39.137631] ? __pfx___split_vma+0x10/0x10 [ 39.138207] ? find_held_lock+0x2c/0x110 [ 39.138758] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.139335] ? lock_is_held_type+0x9f/0x120 [ 39.139886] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.140527] ? mtree_range_walk+0x632/0x900 [ 39.141106] ? mas_walk+0x5c7/0x7c0 [ 39.141583] do_vmi_munmap+0x1f1/0x2b0 [ 39.142107] mmap_region+0x1f9/0x2660 [ 39.142607] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.143144] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.143905] ? __pfx_lock_acquire+0x10/0x10 [ 39.144456] ? __pfx_mmap_region+0x10/0x10 [ 39.145005] ? security_mmap_addr+0x7d/0xa0 [ 39.145548] ? get_unmapped_area+0x1f5/0x3f0 [ 39.146141] do_mmap+0x854/0xf00 [ 39.146599] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.147103] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.147691] ksys_mmap_pgoff+0x3af/0x500 [ 39.148224] do_syscall_64+0x3f/0x90 [ 39.148725] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.149427] RIP: 0033:0x7f163e958d82 [ 39.149890] 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 [ 39.152095] RSP: 002b:00007ffe09f1f938 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.153078] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f163e958d82 [ 39.153977] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f163dd92000 [ 39.154902] RBP: 00007f163dd92000 R08: 0000000000000009 R09: 0000000000001000 [ 39.155797] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558ec3234d90 [ 39.156665] R13: 00007ffe09f1f950 R14: 00007ffe09f1f980 R15: 00007ffe09f1fce0 [ 39.157557] [ 39.157852] [ 39.158123] Allocated by task 213: [ 39.158675] kasan_save_stack+0x22/0x50 [ 39.159282] kasan_set_track+0x25/0x30 [ 39.159873] __kasan_slab_alloc+0x59/0x70 [ 39.160413] kmem_cache_alloc+0x16b/0x370 [ 39.160933] vm_area_dup+0x20/0x160 [ 39.161388] __split_vma+0x170/0x950 [ 39.161855] split_vma+0xc6/0x110 [ 39.162306] mprotect_fixup+0x8d2/0xb30 [ 39.162816] do_mprotect_pkey+0x87e/0xd40 [ 39.163338] __x64_sys_mprotect+0x78/0xc0 [ 39.163858] do_syscall_64+0x3f/0x90 [ 39.164332] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.164975] [ 39.165189] Freed by task 213: [ 39.165579] kasan_save_stack+0x22/0x50 [ 39.166092] kasan_set_track+0x25/0x30 [ 39.166591] kasan_save_free_info+0x2b/0x50 [ 39.167124] __kasan_slab_free+0x10a/0x190 [ 39.167654] kmem_cache_free+0x10d/0x4d0 [ 39.168160] rcu_core+0x8c8/0x2860 [ 39.168607] __do_softirq+0x1b7/0x7d4 [ 39.169084] [ 39.169298] Last potentially related work creation: [ 39.169949] kasan_save_stack+0x22/0x50 [ 39.170463] __kasan_record_aux_stack+0x8e/0xa0 [ 39.171038] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.171679] remove_vma+0x139/0x170 [ 39.172140] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.172696] do_vmi_munmap+0x1f1/0x2b0 [ 39.173189] __vm_munmap+0x138/0x3a0 [ 39.173659] __x64_sys_munmap+0x59/0x80 [ 39.174164] do_syscall_64+0x3f/0x90 [ 39.174642] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.175284] [ 39.175497] The buggy address belongs to the object at ffff88800e3c0740 [ 39.175497] which belongs to the cache vm_area_struct of size 168 [ 39.177009] The buggy address is located 88 bytes inside of [ 39.177009] freed 168-byte region [ffff88800e3c0740, ffff88800e3c07e8) [ 39.178462] [ 39.178676] The buggy address belongs to the physical page: [ 39.179341] page:000000003c4c0abc refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe3c0 [ 39.180459] memcg:ffff8880166e8f01 [ 39.180967] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.181603] page_type: 0xffffffff() [ 39.182028] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 39.183003] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880166e8f01 [ 39.184080] page dumped because: kasan: bad access detected [ 39.184889] [ 39.185119] Memory state around the buggy address: [ 39.185771] ffff88800e3c0680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.186754] ffff88800e3c0700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 39.187754] >ffff88800e3c0780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 39.188574] ^ [ 39.189095] ffff88800e3c0800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 39.189999] ffff88800e3c0880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 39.190984] ================================================================== [ 39.191935] Disabling lock debugging due to kernel taint [ 41.352082] BUG: Bad rss-counter state mm:00000000472285eb type:MM_FILEPAGES val:33 [ 41.353078] BUG: Bad rss-counter state mm:00000000472285eb type:MM_ANONPAGES val:22 [ 41.733844] BUG: Bad rss-counter state mm:0000000059ea7cab type:MM_FILEPAGES val:33 [ 41.735133] BUG: Bad rss-counter state mm:0000000059ea7cab type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4300' (ECDSA) to the list of known hosts. 2023/06/20 07:22:58 fuzzer started 2023/06/20 07:22:58 dialing manager at localhost:44161 2023/06/20 07:22:58 checking machine... 2023/06/20 07:22:58 checking revisions... [ 42.506520] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:22:59 testing simple program... [ 42.559999] cgroup: Unknown subsys name 'net' [ 42.606143] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:22:51 Registers: info registers vcpu 0 RAX=0000000000000008 RBX=0000560b599d3ed0 RCX=0000000000000000 RDX=0000000000080000 RSI=00007f4f18c4315e RDI=00000000ffffff9c RBP=0000000000000008 RSP=00007ffdd86dcd40 R8 =0000000000080000 R9 =00007f4f18c4315e R10=0000000000000000 R11=0000000000000287 R12=0000000000000008 R13=0000560b599d3ed0 R14=0000000000000001 R15=0000560b599cc770 RIP=00007f4f190c20d8 RFL=00000202 [-------] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f4f18c4d900 00000000 00000000 GS =0000 0000000000000000 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=00007f4f192050b0 CR3=000000001a33c000 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=ffff888015eeaa50 RBX=0000000000000000 RCX=ffffffff81978865 RDX=1ffff11002bdd58f RSI=0000000000000008 RDI=ffffea0000637a80 RBP=ffff888015eeac78 RSP=ffff88801477f970 R8 =0000000000000000 R9 =0000000000055000 R10=0000000000800000 R11=0000000000000000 R12=ffffea0000637a80 R13=0000000000000000 R14=dffffc0000000000 R15=0000000000055000 RIP=ffffffff8180fd28 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fccdc245900 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=00007fccdb684818 CR3=000000000e1d4000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=ca975d677c6607d300000000000ae988 XMM05=37020e266bf8cc8e0000000000135b00 XMM06=2e272316ccb5af3400000000001348a0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000