syzkaller login: [ 28.920888] BUG: Bad rss-counter state mm:00000000878ccb72 type:MM_FILEPAGES val:33 [ 28.921881] BUG: Bad rss-counter state mm:00000000878ccb72 type:MM_ANONPAGES val:22 [ 29.090313] ================================================================== [ 29.091583] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.092718] Read of size 8 at addr ffff88800f6b93f8 by task sshd/220 [ 29.093681] [ 29.093993] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 29.095031] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.096008] Call Trace: [ 29.096326] [ 29.096611] dump_stack_lvl+0x91/0xf0 [ 29.097131] print_report+0xcc/0x620 [ 29.097616] ? __virt_addr_valid+0x102/0x340 [ 29.098204] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.098853] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.099603] kasan_report+0xbe/0xf0 [ 29.100113] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.100736] vma_interval_tree_remove+0xc75/0xec0 [ 29.101348] vma_prepare+0xc54/0x11a0 [ 29.101856] __split_vma+0x5af/0x950 [ 29.102340] ? __pfx___split_vma+0x10/0x10 [ 29.102920] ? find_held_lock+0x2c/0x110 [ 29.103433] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.104018] ? lock_is_held_type+0x9f/0x120 [ 29.104551] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.105162] ? mtree_range_walk+0x632/0x900 [ 29.105713] ? mas_walk+0x5c7/0x7c0 [ 29.106226] do_vmi_munmap+0x1f1/0x2b0 [ 29.106739] mmap_region+0x1f9/0x2660 [ 29.107234] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.107741] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.108480] ? __pfx_lock_acquire+0x10/0x10 [ 29.109031] ? __pfx_mmap_region+0x10/0x10 [ 29.109552] ? security_mmap_addr+0x7d/0xa0 [ 29.110113] ? get_unmapped_area+0x1f5/0x3f0 [ 29.110675] do_mmap+0x854/0xf00 [ 29.111133] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.111625] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.112208] ksys_mmap_pgoff+0x3af/0x500 [ 29.112710] do_syscall_64+0x3f/0x90 [ 29.113201] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.113910] RIP: 0033:0x7fec212ced82 [ 29.114364] 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 [ 29.116542] RSP: 002b:00007ffc68e189b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.117467] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fec212ced82 [ 29.118351] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fec20708000 [ 29.119236] RBP: 00007fec20708000 R08: 0000000000000009 R09: 0000000000001000 [ 29.120124] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d9cf220ec0 [ 29.120994] R13: 00007ffc68e189d0 R14: 00007ffc68e18a00 R15: 00007ffc68e18d60 [ 29.121908] [ 29.122207] [ 29.122433] Allocated by task 212: [ 29.122894] kasan_save_stack+0x22/0x50 [ 29.123394] kasan_set_track+0x25/0x30 [ 29.123914] __kasan_slab_alloc+0x59/0x70 [ 29.124436] kmem_cache_alloc+0x16b/0x370 [ 29.124968] vm_area_dup+0x20/0x160 [ 29.125427] __split_vma+0x170/0x950 [ 29.125928] split_vma+0xc6/0x110 [ 29.126410] mprotect_fixup+0x8d2/0xb30 [ 29.126948] do_mprotect_pkey+0x87e/0xd40 [ 29.127490] __x64_sys_mprotect+0x78/0xc0 [ 29.128052] do_syscall_64+0x3f/0x90 [ 29.128538] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.129223] [ 29.129439] Freed by task 19: [ 29.129861] kasan_save_stack+0x22/0x50 [ 29.130400] kasan_set_track+0x25/0x30 [ 29.130914] kasan_save_free_info+0x2b/0x50 [ 29.131455] __kasan_slab_free+0x10a/0x190 [ 29.132025] kmem_cache_free+0x10d/0x4d0 [ 29.132538] rcu_core+0x8c8/0x2860 [ 29.133010] __do_softirq+0x1b7/0x7d4 [ 29.133497] [ 29.133713] Last potentially related work creation: [ 29.134351] kasan_save_stack+0x22/0x50 [ 29.134902] __kasan_record_aux_stack+0x8e/0xa0 [ 29.135487] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.136168] remove_vma+0x139/0x170 [ 29.136637] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.137218] do_vmi_munmap+0x1f1/0x2b0 [ 29.137718] __vm_munmap+0x138/0x3a0 [ 29.138230] __x64_sys_munmap+0x59/0x80 [ 29.138768] do_syscall_64+0x3f/0x90 [ 29.139264] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.139934] [ 29.140158] The buggy address belongs to the object at ffff88800f6b93a0 [ 29.140158] which belongs to the cache vm_area_struct of size 168 [ 29.141671] The buggy address is located 88 bytes inside of [ 29.141671] freed 168-byte region [ffff88800f6b93a0, ffff88800f6b9448) [ 29.143150] [ 29.143370] The buggy address belongs to the physical page: [ 29.144052] page:00000000592e0094 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf6b9 [ 29.145164] memcg:ffff88801a228c01 [ 29.145595] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.146284] page_type: 0xffffffff() [ 29.146759] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 29.147782] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a228c01 [ 29.148816] page dumped because: kasan: bad access detected [ 29.149553] [ 29.149807] Memory state around the buggy address: [ 29.150504] ffff88800f6b9280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 29.151474] ffff88800f6b9300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 29.152447] >ffff88800f6b9380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 29.153414] ^ [ 29.154391] ffff88800f6b9400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 29.155360] ffff88800f6b9480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.156331] ================================================================== [ 29.157581] Disabling lock debugging due to kernel taint [ 31.352005] BUG: Bad rss-counter state mm:00000000e7d5d537 type:MM_FILEPAGES val:33 [ 31.353266] BUG: Bad rss-counter state mm:00000000e7d5d537 type:MM_ANONPAGES val:22 [ 31.901832] BUG: Bad rss-counter state mm:000000005857bcb6 type:MM_FILEPAGES val:33 [ 31.903035] BUG: Bad rss-counter state mm:000000005857bcb6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:55348' (ECDSA) to the list of known hosts. 2023/06/21 05:43:08 fuzzer started 2023/06/21 05:43:08 dialing manager at localhost:36067 2023/06/21 05:43:08 checking machine... 2023/06/21 05:43:08 checking revisions... [ 32.552272] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:43:09 testing simple program... [ 32.597306] cgroup: Unknown subsys name 'net' [ 32.649908] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:43:08 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=00000000f4506d70 RCX=ffff88806c436b80 RDX=000000000000000a RSI=ffffffff8180c6a2 RDI=000000004225b1ba RBP=ffff88800ffc6370 RSP=ffff888018cf7a58 R8 =00000000ff92a0a6 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000001 R13=0000000000000cc0 R14=ffff888018cf7ac0 R15=000000000000000a RIP=ffffffff822704fc 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 00007f1b40b9e900 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=00007f1b411560b0 CR3=000000001a35a000 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007f142d6d6810 CR3=000000000e0de000 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=2038303a33343a3530203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038303a33343a3530203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000