syzkaller login: [ 32.327661] BUG: Bad rss-counter state mm:000000004eee7eb2 type:MM_FILEPAGES val:32 [ 32.329043] BUG: Bad rss-counter state mm:000000004eee7eb2 type:MM_ANONPAGES val:22 [ 32.471909] ================================================================== [ 32.473054] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.474240] Read of size 8 at addr ffff88800d6a9058 by task sshd/220 [ 32.475009] [ 32.475228] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.476091] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.477104] Call Trace: [ 32.477459] [ 32.477752] dump_stack_lvl+0x91/0xf0 [ 32.478272] print_report+0xcc/0x620 [ 32.478767] ? __virt_addr_valid+0x102/0x340 [ 32.479338] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.479954] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.480586] kasan_report+0xbe/0xf0 [ 32.481078] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.481716] vma_interval_tree_remove+0xc75/0xec0 [ 32.482340] vma_prepare+0xc54/0x11a0 [ 32.482842] __split_vma+0x5af/0x950 [ 32.483337] ? __pfx___split_vma+0x10/0x10 [ 32.483879] ? find_held_lock+0x2c/0x110 [ 32.484424] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.484988] ? lock_is_held_type+0x9f/0x120 [ 32.485553] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.486154] ? mtree_range_walk+0x632/0x900 [ 32.486711] ? mas_walk+0x5c7/0x7c0 [ 32.487182] do_vmi_munmap+0x1f1/0x2b0 [ 32.487684] mmap_region+0x1f9/0x2660 [ 32.488168] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.488685] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.489412] ? __pfx_lock_acquire+0x10/0x10 [ 32.489943] ? __pfx_mmap_region+0x10/0x10 [ 32.490480] ? security_mmap_addr+0x7d/0xa0 [ 32.491005] ? get_unmapped_area+0x1f5/0x3f0 [ 32.491564] do_mmap+0x854/0xf00 [ 32.492009] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.492504] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.493073] ksys_mmap_pgoff+0x3af/0x500 [ 32.493589] do_syscall_64+0x3f/0x90 [ 32.494083] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.494759] RIP: 0033:0x7f455528bd82 [ 32.495238] 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 [ 32.497401] RSP: 002b:00007ffc09e5a218 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.498312] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f455528bd82 [ 32.499195] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f45546c5000 [ 32.500064] RBP: 00007f45546c5000 R08: 0000000000000009 R09: 0000000000001000 [ 32.500946] R10: 0000000000000812 R11: 0000000000000206 R12: 00005572ee063ec0 [ 32.501820] R13: 00007ffc09e5a230 R14: 00007ffc09e5a260 R15: 00007ffc09e5a5c0 [ 32.502687] [ 32.502982] [ 32.503199] Allocated by task 213: [ 32.503628] kasan_save_stack+0x22/0x50 [ 32.504130] kasan_set_track+0x25/0x30 [ 32.504623] __kasan_slab_alloc+0x59/0x70 [ 32.505148] kmem_cache_alloc+0x16b/0x370 [ 32.505683] vm_area_dup+0x20/0x160 [ 32.506141] __split_vma+0x170/0x950 [ 32.506614] split_vma+0xc6/0x110 [ 32.507051] mprotect_fixup+0x8d2/0xb30 [ 32.507553] do_mprotect_pkey+0x87e/0xd40 [ 32.508073] __x64_sys_mprotect+0x78/0xc0 [ 32.508594] do_syscall_64+0x3f/0x90 [ 32.509064] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.509718] [ 32.509933] Freed by task 213: [ 32.510332] kasan_save_stack+0x22/0x50 [ 32.510836] kasan_set_track+0x25/0x30 [ 32.511325] kasan_save_free_info+0x2b/0x50 [ 32.511858] __kasan_slab_free+0x10a/0x190 [ 32.512386] kmem_cache_free+0x10d/0x4d0 [ 32.512891] rcu_core+0x8c8/0x2860 [ 32.513339] __do_softirq+0x1b7/0x7d4 [ 32.513814] [ 32.514033] Last potentially related work creation: [ 32.514622] kasan_save_stack+0x22/0x50 [ 32.515177] __kasan_record_aux_stack+0x8e/0xa0 [ 32.515756] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.516417] remove_vma+0x139/0x170 [ 32.516865] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.517427] do_vmi_munmap+0x1f1/0x2b0 [ 32.517910] __vm_munmap+0x138/0x3a0 [ 32.518384] __x64_sys_munmap+0x59/0x80 [ 32.518893] do_syscall_64+0x3f/0x90 [ 32.519373] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.520015] [ 32.520231] Second to last potentially related work creation: [ 32.520920] kasan_save_stack+0x22/0x50 [ 32.521434] __kasan_record_aux_stack+0x8e/0xa0 [ 32.522019] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.522691] remove_vma+0x139/0x170 [ 32.523143] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.523729] do_vmi_munmap+0x1f1/0x2b0 [ 32.524227] mmap_region+0x1f9/0x2660 [ 32.524727] do_mmap+0x854/0xf00 [ 32.525191] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.525717] ksys_mmap_pgoff+0x3af/0x500 [ 32.526244] do_syscall_64+0x3f/0x90 [ 32.526736] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.527393] [ 32.527619] The buggy address belongs to the object at ffff88800d6a9000 [ 32.527619] which belongs to the cache vm_area_struct of size 168 [ 32.529127] The buggy address is located 88 bytes inside of [ 32.529127] freed 168-byte region [ffff88800d6a9000, ffff88800d6a90a8) [ 32.530627] [ 32.530851] The buggy address belongs to the physical page: [ 32.531542] page:0000000006b1af10 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd6a9 [ 32.532672] memcg:ffff88800e29eb01 [ 32.533107] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.533813] page_type: 0xffffffff() [ 32.534309] raw: 0100000000000200 ffff88800879fc80 ffffea00003626c0 dead000000000004 [ 32.535266] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e29eb01 [ 32.536215] page dumped because: kasan: bad access detected [ 32.536913] [ 32.537136] Memory state around the buggy address: [ 32.537751] ffff88800d6a8f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 32.538641] ffff88800d6a8f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 32.539543] >ffff88800d6a9000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.540456] ^ [ 32.541218] ffff88800d6a9080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 32.542136] ffff88800d6a9100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.543046] ================================================================== [ 32.544029] Disabling lock debugging due to kernel taint [ 34.969591] BUG: Bad rss-counter state mm:00000000032e2b6e type:MM_FILEPAGES val:33 [ 34.970841] BUG: Bad rss-counter state mm:00000000032e2b6e type:MM_ANONPAGES val:22 [ 35.405537] BUG: Bad rss-counter state mm:0000000089c5910b type:MM_FILEPAGES val:33 [ 35.406855] BUG: Bad rss-counter state mm:0000000089c5910b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4543' (ECDSA) to the list of known hosts. 2023/06/19 21:56:00 fuzzer started 2023/06/19 21:56:01 dialing manager at localhost:44161 2023/06/19 21:56:01 checking machine... 2023/06/19 21:56:01 checking revisions... [ 36.127431] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:56:01 testing simple program... [ 36.180333] cgroup: Unknown subsys name 'net' [ 36.228646] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:55:59 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88800f4e7460 RCX=0000000000000001 RDX=1ffff11001e9ce8e RSI=ffff88800f4e7830 RDI=ffff88800f4e7470 RBP=ffff88800f4e7830 RSP=ffff88800f4e73b8 R8 =ffffffff8614a4a8 R9 =ffff88800f4e74a0 R10=0000000000038001 R11=0000000000024024 R12=0000000000000008 R13=ffff88800f4e0000 R14=ffff88800f4e7838 R15=ffff88800f4e7460 RIP=ffffffff8113046e 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 00007fab14019900 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=00007fab1346c790 CR3=000000000c966000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=9627887f355cd15600000000000ae988 XMM05=8b5a176a4e577d7200000000001373e8 XMM06=4fda316b135da52b0000000000136488 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=fffffbfff0ba77db RBX=0000000000000001 RCX=ffffffff812d869a RDX=fffffbfff0ba77db RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=fffffbfff0ba77da RSP=ffff88806cf09d30 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffffffff8560b640 R13=ffffffff8182754a R14=ffffffff818d9dc6 R15=ffff888018920180 RIP=ffffffff8180efaf 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 00007f9f777fe900 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=00007ffdf8957000 CR3=000000000c6f6000 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=2030303a36353a3132203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030303a36353a3132203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000