syzkaller login: [ 38.840008] BUG: Bad rss-counter state mm:000000009ae5fadb type:MM_FILEPAGES val:33 [ 38.841503] BUG: Bad rss-counter state mm:000000009ae5fadb type:MM_ANONPAGES val:22 [ 39.010325] ================================================================== [ 39.011330] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.012376] Read of size 8 at addr ffff888018e63ed8 by task sshd/219 [ 39.013251] [ 39.013522] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.014567] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.015656] Call Trace: [ 39.016018] [ 39.016331] dump_stack_lvl+0x91/0xf0 [ 39.016900] print_report+0xcc/0x620 [ 39.017442] ? __virt_addr_valid+0x102/0x340 [ 39.018059] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.018746] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.019434] kasan_report+0xbe/0xf0 [ 39.019966] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.020675] vma_interval_tree_remove+0xc75/0xec0 [ 39.021342] vma_prepare+0xc54/0x11a0 [ 39.021879] __split_vma+0x5af/0x950 [ 39.022401] ? __pfx___split_vma+0x10/0x10 [ 39.023009] ? find_held_lock+0x2c/0x110 [ 39.023584] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.024223] ? lock_is_held_type+0x9f/0x120 [ 39.024843] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.025524] ? mtree_range_walk+0x632/0x900 [ 39.026142] ? mas_walk+0x5c7/0x7c0 [ 39.026674] do_vmi_munmap+0x1f1/0x2b0 [ 39.027226] mmap_region+0x1f9/0x2660 [ 39.027775] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.028355] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.029167] ? __pfx_lock_acquire+0x10/0x10 [ 39.029762] ? __pfx_mmap_region+0x10/0x10 [ 39.030355] ? security_mmap_addr+0x7d/0xa0 [ 39.030960] ? get_unmapped_area+0x1f5/0x3f0 [ 39.031583] do_mmap+0x854/0xf00 [ 39.032074] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.032632] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.033259] ksys_mmap_pgoff+0x3af/0x500 [ 39.033826] do_syscall_64+0x3f/0x90 [ 39.034360] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.035088] RIP: 0033:0x7fc50ab97d82 [ 39.035598] 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 [ 39.038033] RSP: 002b:00007fff5176c628 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.039063] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc50ab97d82 [ 39.040026] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc509fd1000 [ 39.040990] RBP: 00007fc509fd1000 R08: 0000000000000009 R09: 0000000000001000 [ 39.041950] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c37f3a1980 [ 39.042916] R13: 00007fff5176c640 R14: 00007fff5176c670 R15: 00007fff5176c9d0 [ 39.043886] [ 39.044222] [ 39.044459] Allocated by task 212: [ 39.044953] kasan_save_stack+0x22/0x50 [ 39.045532] kasan_set_track+0x25/0x30 [ 39.046092] __kasan_slab_alloc+0x59/0x70 [ 39.046678] kmem_cache_alloc+0x16b/0x370 [ 39.047255] vm_area_dup+0x20/0x160 [ 39.047776] __split_vma+0x170/0x950 [ 39.048315] split_vma+0xc6/0x110 [ 39.048824] mprotect_fixup+0x8d2/0xb30 [ 39.049384] do_mprotect_pkey+0x87e/0xd40 [ 39.049964] __x64_sys_mprotect+0x78/0xc0 [ 39.050554] do_syscall_64+0x3f/0x90 [ 39.051085] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.051807] [ 39.052045] Freed by task 212: [ 39.052482] kasan_save_stack+0x22/0x50 [ 39.053064] kasan_set_track+0x25/0x30 [ 39.053620] kasan_save_free_info+0x2b/0x50 [ 39.054212] __kasan_slab_free+0x10a/0x190 [ 39.054817] kmem_cache_free+0x10d/0x4d0 [ 39.055398] rcu_core+0x8c8/0x2860 [ 39.055900] __do_softirq+0x1b7/0x7d4 [ 39.056438] [ 39.056692] Last potentially related work creation: [ 39.057364] kasan_save_stack+0x22/0x50 [ 39.057929] __kasan_record_aux_stack+0x8e/0xa0 [ 39.058578] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.059297] remove_vma+0x139/0x170 [ 39.059811] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.060448] do_vmi_munmap+0x1f1/0x2b0 [ 39.061005] __vm_munmap+0x138/0x3a0 [ 39.061531] __x64_sys_munmap+0x59/0x80 [ 39.062097] do_syscall_64+0x3f/0x90 [ 39.062630] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.063354] [ 39.063593] The buggy address belongs to the object at ffff888018e63e80 [ 39.063593] which belongs to the cache vm_area_struct of size 168 [ 39.065262] The buggy address is located 88 bytes inside of [ 39.065262] freed 168-byte region [ffff888018e63e80, ffff888018e63f28) [ 39.066848] [ 39.067094] The buggy address belongs to the physical page: [ 39.067844] page:00000000447e70db refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18e63 [ 39.069081] memcg:ffff88800fe24501 [ 39.069534] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.070224] page_type: 0xffffffff() [ 39.070712] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 39.071686] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fe24501 [ 39.072666] page dumped because: kasan: bad access detected [ 39.073381] [ 39.073609] Memory state around the buggy address: [ 39.074234] ffff888018e63d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.075159] ffff888018e63e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 39.076072] >ffff888018e63e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.076987] ^ [ 39.077760] ffff888018e63f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 39.078677] ffff888018e63f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 39.079596] ================================================================== [ 39.081124] Disabling lock debugging due to kernel taint [ 40.875757] BUG: Bad rss-counter state mm:000000006d3f0824 type:MM_FILEPAGES val:33 [ 40.877192] BUG: Bad rss-counter state mm:000000006d3f0824 type:MM_ANONPAGES val:22 [ 41.389787] BUG: Bad rss-counter state mm:0000000079e57279 type:MM_FILEPAGES val:33 [ 41.390917] BUG: Bad rss-counter state mm:0000000079e57279 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:45878' (ECDSA) to the list of known hosts. 2023/06/19 14:09:02 fuzzer started 2023/06/19 14:09:02 dialing manager at localhost:44161 2023/06/19 14:09:02 checking machine... 2023/06/19 14:09:02 checking revisions... [ 42.139621] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:09:03 testing simple program... [ 42.184412] cgroup: Unknown subsys name 'net' [ 42.250431] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:08:58 Registers: info registers vcpu 0 RAX=0000000075f571fa RBX=00000000f7763780 RCX=ffff888018e27a0c RDX=0000000000000010 RSI=000000000000001d RDI=0000000075f571fb RBP=ffff88800844f780 RSP=ffff888018e27998 R8 =000000008180c522 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000001 R13=0000000000092c40 R14=ffff888018e27a00 R15=0000000000000010 RIP=ffffffff82270e91 RFL=00000217 [----APC] 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 00007f9289190900 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=00007f9289745650 CR3=0000000016c7c000 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=ffffffff81370a3a RBX=0000000000000002 RCX=0000000000000002 RDX=ffff88806cf09d01 RSI=ffff88806cf09db8 RDI=ffff88806cf09db8 RBP=ffff88806cf09aa8 RSP=ffff88806cf099e0 R8 =ffffffff86137cb0 R9 =ffff88806cf09a90 R10=0000000000038001 R11=0000000000020ed0 R12=ffff88806cf09ab0 R13=ffff88806cf09a98 R14=ffff88806cf09dc0 R15=ffff88806cf09a50 RIP=ffffffff81131041 RFL=00000202 [-------] 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 00007f665683e900 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=00007f6655c38940 CR3=000000000d8bc000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=5916d491a9f45c1200000000000ae988 XMM05=7b129acb989ee90200000000001350c8 XMM06=dfcdbad4f1609c370000000000133c10 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000