syzkaller login: [ 31.139481] BUG: Bad rss-counter state mm:000000007f9eaa2f type:MM_FILEPAGES val:33 [ 31.140728] BUG: Bad rss-counter state mm:000000007f9eaa2f type:MM_ANONPAGES val:22 [ 31.186515] ================================================================== [ 31.187477] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.188468] Read of size 8 at addr ffff88801bc13140 by task sshd/219 [ 31.189288] [ 31.189521] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.190458] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.191726] Call Trace: [ 31.192066] [ 31.192371] dump_stack_lvl+0x91/0xf0 [ 31.192895] print_report+0xcc/0x620 [ 31.193407] ? __virt_addr_valid+0x102/0x340 [ 31.193998] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.194655] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.195327] kasan_report+0xbe/0xf0 [ 31.195852] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.196524] vma_interval_tree_remove+0xc75/0xec0 [ 31.197252] vma_prepare+0xc54/0x11a0 [ 31.197882] __split_vma+0x5af/0x950 [ 31.198490] ? __pfx___split_vma+0x10/0x10 [ 31.199069] ? find_held_lock+0x2c/0x110 [ 31.199642] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.200267] ? lock_is_held_type+0x9f/0x120 [ 31.200856] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.201508] ? mtree_range_walk+0x632/0x900 [ 31.202171] ? mas_walk+0x5c7/0x7c0 [ 31.202669] do_vmi_munmap+0x1f1/0x2b0 [ 31.203184] mmap_region+0x1f9/0x2660 [ 31.203695] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.204384] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.205172] ? __pfx_lock_acquire+0x10/0x10 [ 31.205770] ? __pfx_mmap_region+0x10/0x10 [ 31.206354] ? security_mmap_addr+0x7d/0xa0 [ 31.206939] ? get_unmapped_area+0x1f5/0x3f0 [ 31.207541] do_mmap+0x854/0xf00 [ 31.208010] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.208539] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.209136] ksys_mmap_pgoff+0x3af/0x500 [ 31.209674] do_syscall_64+0x3f/0x90 [ 31.210205] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.211048] RIP: 0033:0x7f628dbf9d82 [ 31.211597] 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 [ 31.213827] RSP: 002b:00007ffe9aa78078 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.214797] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f628dbf9d82 [ 31.215714] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f628d033000 [ 31.216695] RBP: 00007f628d033000 R08: 0000000000000009 R09: 0000000000001000 [ 31.217723] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ffa3addec0 [ 31.218720] R13: 00007ffe9aa78090 R14: 00007ffe9aa780c0 R15: 00007ffe9aa78420 [ 31.219653] [ 31.219968] [ 31.220197] Allocated by task 212: [ 31.220656] kasan_save_stack+0x22/0x50 [ 31.221199] kasan_set_track+0x25/0x30 [ 31.221804] __kasan_slab_alloc+0x59/0x70 [ 31.222380] kmem_cache_alloc+0x16b/0x370 [ 31.222944] vm_area_dup+0x20/0x160 [ 31.223464] __split_vma+0x170/0x950 [ 31.224106] split_vma+0xc6/0x110 [ 31.224578] mprotect_fixup+0x8d2/0xb30 [ 31.225125] do_mprotect_pkey+0x87e/0xd40 [ 31.225690] __x64_sys_mprotect+0x78/0xc0 [ 31.226264] do_syscall_64+0x3f/0x90 [ 31.226775] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.227477] [ 31.227711] Freed by task 212: [ 31.228139] kasan_save_stack+0x22/0x50 [ 31.228681] kasan_set_track+0x25/0x30 [ 31.229215] kasan_save_free_info+0x2b/0x50 [ 31.229796] __kasan_slab_free+0x10a/0x190 [ 31.230502] kmem_cache_free+0x10d/0x4d0 [ 31.231150] rcu_core+0x8c8/0x2860 [ 31.231634] __do_softirq+0x1b7/0x7d4 [ 31.232155] [ 31.232391] Last potentially related work creation: [ 31.233022] kasan_save_stack+0x22/0x50 [ 31.233560] __kasan_record_aux_stack+0x8e/0xa0 [ 31.234183] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.234874] remove_vma+0x139/0x170 [ 31.235354] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.235949] do_vmi_munmap+0x1f1/0x2b0 [ 31.236526] __vm_munmap+0x138/0x3a0 [ 31.237034] __x64_sys_munmap+0x59/0x80 [ 31.237728] do_syscall_64+0x3f/0x90 [ 31.238263] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.238982] [ 31.239213] The buggy address belongs to the object at ffff88801bc130e8 [ 31.239213] which belongs to the cache vm_area_struct of size 168 [ 31.240795] The buggy address is located 88 bytes inside of [ 31.240795] freed 168-byte region [ffff88801bc130e8, ffff88801bc13190) [ 31.242372] [ 31.242606] The buggy address belongs to the physical page: [ 31.243333] page:0000000054097ffd refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1bc13 [ 31.244646] memcg:ffff8880146acd01 [ 31.245103] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.245801] page_type: 0xffffffff() [ 31.246288] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.247281] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880146acd01 [ 31.248260] page dumped because: kasan: bad access detected [ 31.248971] [ 31.249197] Memory state around the buggy address: [ 31.250020] ffff88801bc13000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.250975] ffff88801bc13080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 31.251900] >ffff88801bc13100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.252819] ^ [ 31.253499] ffff88801bc13180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.254417] ffff88801bc13200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.255381] ================================================================== [ 31.256967] Disabling lock debugging due to kernel taint [ 33.381840] BUG: Bad rss-counter state mm:000000005344bcea type:MM_FILEPAGES val:33 [ 33.382911] BUG: Bad rss-counter state mm:000000005344bcea type:MM_ANONPAGES val:22 [ 33.831708] BUG: Bad rss-counter state mm:00000000f0deadef type:MM_FILEPAGES val:33 [ 33.832769] BUG: Bad rss-counter state mm:00000000f0deadef type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:54021' (ECDSA) to the list of known hosts. 2023/06/21 10:16:29 fuzzer started 2023/06/21 10:16:29 dialing manager at localhost:36067 2023/06/21 10:16:29 checking machine... 2023/06/21 10:16:29 checking revisions... [ 34.584139] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:16:29 testing simple program... [ 34.629352] cgroup: Unknown subsys name 'net' [ 34.684793] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:16:28 Registers: info registers vcpu 0 RAX=ffffffff8184725c RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff11002cb8e56 RSI=ffffffff8184725c RDI=ffff8880165c7320 RBP=ffff8880165c72f0 RSP=ffff8880165c7250 R8 =0000000000000001 R9 =ffff8880165c7298 R10=0000000000038001 R11=0000000000020c51 R12=ffff8880165c7320 R13=0000000000000000 R14=ffff8880186251c0 R15=00000000000928c0 RIP=ffffffff84538440 RFL=00000286 [--S--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 00007f5a23fe5900 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=00007fff4e1ca000 CR3=0000000016724000 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=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 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=0000000000000001 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=00007f3742970df0 CR3=000000000c672000 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=2038323a36313a3031203132206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038323a36313a3031203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000