syzkaller login: [ 32.962227] BUG: Bad rss-counter state mm:00000000025732a2 type:MM_FILEPAGES val:33 [ 32.964168] BUG: Bad rss-counter state mm:00000000025732a2 type:MM_ANONPAGES val:22 [ 33.125553] ================================================================== [ 33.126478] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.127431] Read of size 8 at addr ffff888019c14b38 by task sshd/219 [ 33.128223] [ 33.128448] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.129483] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.130477] Call Trace: [ 33.130809] [ 33.131122] dump_stack_lvl+0x91/0xf0 [ 33.131632] print_report+0xcc/0x620 [ 33.132132] ? __virt_addr_valid+0x102/0x340 [ 33.132689] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.133320] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.133938] kasan_report+0xbe/0xf0 [ 33.134420] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.135060] vma_interval_tree_remove+0xc75/0xec0 [ 33.135678] vma_prepare+0xc54/0x11a0 [ 33.136175] __split_vma+0x5af/0x950 [ 33.136655] ? __pfx___split_vma+0x10/0x10 [ 33.137204] ? find_held_lock+0x2c/0x110 [ 33.137731] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.138311] ? lock_is_held_type+0x9f/0x120 [ 33.138859] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.139464] ? mtree_range_walk+0x632/0x900 [ 33.140035] ? mas_walk+0x5c7/0x7c0 [ 33.140512] do_vmi_munmap+0x1f1/0x2b0 [ 33.141003] mmap_region+0x1f9/0x2660 [ 33.141486] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.142003] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.142724] ? __pfx_lock_acquire+0x10/0x10 [ 33.143275] ? __pfx_mmap_region+0x10/0x10 [ 33.143821] ? security_mmap_addr+0x7d/0xa0 [ 33.144373] ? get_unmapped_area+0x1f5/0x3f0 [ 33.144943] do_mmap+0x854/0xf00 [ 33.145399] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.145918] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.146512] ksys_mmap_pgoff+0x3af/0x500 [ 33.147039] do_syscall_64+0x3f/0x90 [ 33.147534] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.148229] RIP: 0033:0x7fbc91862d82 [ 33.148707] 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 [ 33.150930] RSP: 002b:00007ffc342af178 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.151891] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbc91862d82 [ 33.152781] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbc90c9c000 [ 33.153667] RBP: 00007fbc90c9c000 R08: 0000000000000009 R09: 0000000000001000 [ 33.154563] R10: 0000000000000812 R11: 0000000000000206 R12: 00005624f7748b20 [ 33.155459] R13: 00007ffc342af190 R14: 00007ffc342af1c0 R15: 00007ffc342af520 [ 33.156387] [ 33.156699] [ 33.156923] Allocated by task 212: [ 33.157373] kasan_save_stack+0x22/0x50 [ 33.157900] kasan_set_track+0x25/0x30 [ 33.158423] __kasan_slab_alloc+0x59/0x70 [ 33.158971] kmem_cache_alloc+0x16b/0x370 [ 33.159514] vm_area_dup+0x20/0x160 [ 33.160006] __split_vma+0x170/0x950 [ 33.160492] split_vma+0xc6/0x110 [ 33.160957] mprotect_fixup+0x8d2/0xb30 [ 33.161483] do_mprotect_pkey+0x87e/0xd40 [ 33.162023] __x64_sys_mprotect+0x78/0xc0 [ 33.162566] do_syscall_64+0x3f/0x90 [ 33.163061] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.163750] [ 33.163978] Freed by task 212: [ 33.164391] kasan_save_stack+0x22/0x50 [ 33.164920] kasan_set_track+0x25/0x30 [ 33.165438] kasan_save_free_info+0x2b/0x50 [ 33.165993] __kasan_slab_free+0x10a/0x190 [ 33.166548] kmem_cache_free+0x10d/0x4d0 [ 33.167079] rcu_core+0x8c8/0x2860 [ 33.167547] __do_softirq+0x1b7/0x7d4 [ 33.168055] [ 33.168278] Last potentially related work creation: [ 33.168896] kasan_save_stack+0x22/0x50 [ 33.169430] __kasan_record_aux_stack+0x8e/0xa0 [ 33.170025] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.170699] remove_vma+0x139/0x170 [ 33.171174] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.171761] do_vmi_munmap+0x1f1/0x2b0 [ 33.172271] __vm_munmap+0x138/0x3a0 [ 33.172763] __x64_sys_munmap+0x59/0x80 [ 33.173283] do_syscall_64+0x3f/0x90 [ 33.173775] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.174452] [ 33.174679] The buggy address belongs to the object at ffff888019c14ae0 [ 33.174679] which belongs to the cache vm_area_struct of size 168 [ 33.176227] The buggy address is located 88 bytes inside of [ 33.176227] freed 168-byte region [ffff888019c14ae0, ffff888019c14b88) [ 33.177659] [ 33.177875] The buggy address belongs to the physical page: [ 33.178538] page:0000000011c50596 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19c14 [ 33.179648] memcg:ffff8880143e9301 [ 33.180094] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.180754] page_type: 0xffffffff() [ 33.181210] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 33.182150] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880143e9301 [ 33.183071] page dumped because: kasan: bad access detected [ 33.183757] [ 33.183978] Memory state around the buggy address: [ 33.184570] ffff888019c14a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.185440] ffff888019c14a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 33.186313] >ffff888019c14b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.187193] ^ [ 33.187821] ffff888019c14b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 33.188690] ffff888019c14c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 33.189599] ================================================================== [ 33.190782] Disabling lock debugging due to kernel taint [ 35.178373] BUG: Bad rss-counter state mm:00000000f74f4079 type:MM_FILEPAGES val:33 [ 35.179539] BUG: Bad rss-counter state mm:00000000f74f4079 type:MM_ANONPAGES val:22 [ 35.698812] BUG: Bad rss-counter state mm:000000000bfcb60b type:MM_FILEPAGES val:33 [ 35.700083] BUG: Bad rss-counter state mm:000000000bfcb60b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:58743' (ECDSA) to the list of known hosts. 2023/06/19 12:48:50 fuzzer started 2023/06/19 12:48:50 dialing manager at localhost:44161 2023/06/19 12:48:50 checking machine... 2023/06/19 12:48:50 checking revisions... [ 36.295138] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:48:50 testing simple program... [ 36.342147] cgroup: Unknown subsys name 'net' [ 36.418765] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:48:47 Registers: info registers vcpu 0 RAX=ffff88806c400000 RBX=00000000c2317011 RCX=ffff88806c4b8088 RDX=000000000000000d RSI=0000000000000002 RDI=00000000f0619bf4 RBP=ffff88800d8cdfd0 RSP=ffff88800fdafa30 R8 =000000005b8c4057 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000001 R13=0000000000000dc0 R14=ffff88800fdafa98 R15=000000000000000d RIP=ffffffff82270f13 RFL=00000206 [-----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 00007f34b972f900 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=00007ffcc799e000 CR3=000000000c47a000 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=2030353a38343a3231203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039343a38343a3231203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=00000000000b53b8 RBX=0000000000000001 RCX=ffffffff8450d7d6 RDX=0000000000000005 RSI=ffffffff864b1a1c RDI=ffffffff8604e2b4 RBP=ffff88806cf09ad0 RSP=ffff88806cf09a00 R8 =ffffffff864b1a1c R9 =ffff88806cf09ab8 R10=0000000000038001 R11=00000000000b53b8 R12=ffff88806cf09ad8 R13=ffff88806cf09ac0 R14=ffff88806cf09ab9 R15=ffff88806cf09a78 RIP=ffffffff8112fc10 RFL=00000206 [-----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 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=00007faffb2f3d10 CR3=000000001420a000 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=3d6265eb23a81983a0401e87af3b9966 XMM02=0000000000120028eff9b2d0a8fce9cb XMM03=00000000001200f82c67c8bc2e329bc3 XMM04=4a08097d4516eb2100000000000ae988 XMM05=14b4993b75d0da7b0000000000135070 XMM06=806171799158d9670000000000134110 XMM07=e042d86d42eb936e00000000001249a8 XMM08=c5f23126e2a54e6900000000001200f8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000