syzkaller login: [ 33.208813] BUG: Bad rss-counter state mm:0000000087b87b22 type:MM_FILEPAGES val:33 [ 33.210186] BUG: Bad rss-counter state mm:0000000087b87b22 type:MM_ANONPAGES val:22 [ 33.362145] ================================================================== [ 33.363152] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.364174] Read of size 8 at addr ffff888016b84c20 by task sshd/221 [ 33.365145] [ 33.365389] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.366347] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.367408] Call Trace: [ 33.367758] [ 33.368068] dump_stack_lvl+0x91/0xf0 [ 33.368603] print_report+0xcc/0x620 [ 33.369131] ? __virt_addr_valid+0x102/0x340 [ 33.369736] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.370423] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.371096] kasan_report+0xbe/0xf0 [ 33.371620] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.372342] vma_interval_tree_remove+0xc75/0xec0 [ 33.373003] vma_prepare+0xc54/0x11a0 [ 33.373534] __split_vma+0x5af/0x950 [ 33.374051] ? __pfx___split_vma+0x10/0x10 [ 33.374632] ? find_held_lock+0x2c/0x110 [ 33.375205] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.375831] ? lock_is_held_type+0x9f/0x120 [ 33.376413] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.377077] ? mtree_range_walk+0x632/0x900 [ 33.377679] ? mas_walk+0x5c7/0x7c0 [ 33.378214] do_vmi_munmap+0x1f1/0x2b0 [ 33.378750] mmap_region+0x1f9/0x2660 [ 33.379277] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.379837] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.380622] ? __pfx_lock_acquire+0x10/0x10 [ 33.381212] ? __pfx_mmap_region+0x10/0x10 [ 33.381799] ? security_mmap_addr+0x7d/0xa0 [ 33.382402] ? get_unmapped_area+0x1f5/0x3f0 [ 33.383013] do_mmap+0x854/0xf00 [ 33.383501] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.384054] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.384680] ksys_mmap_pgoff+0x3af/0x500 [ 33.385236] do_syscall_64+0x3f/0x90 [ 33.385765] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.386526] RIP: 0033:0x7fbbba07bd82 [ 33.387032] 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 [ 33.389379] RSP: 002b:00007ffd2185d1d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.390378] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbbba07bd82 [ 33.391304] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbbb94b5000 [ 33.392233] RBP: 00007fbbb94b5000 R08: 0000000000000009 R09: 0000000000001000 [ 33.393162] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a1a8696d90 [ 33.394089] R13: 00007ffd2185d1f0 R14: 00007ffd2185d220 R15: 00007ffd2185d580 [ 33.395051] [ 33.395379] [ 33.395624] Allocated by task 214: [ 33.396105] kasan_save_stack+0x22/0x50 [ 33.396660] kasan_set_track+0x25/0x30 [ 33.397209] __kasan_slab_alloc+0x59/0x70 [ 33.397799] kmem_cache_alloc+0x16b/0x370 [ 33.398385] vm_area_dup+0x20/0x160 [ 33.398878] __split_vma+0x170/0x950 [ 33.399416] split_vma+0xc6/0x110 [ 33.399913] mprotect_fixup+0x8d2/0xb30 [ 33.400471] do_mprotect_pkey+0x87e/0xd40 [ 33.401044] __x64_sys_mprotect+0x78/0xc0 [ 33.401631] do_syscall_64+0x3f/0x90 [ 33.402168] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.402880] [ 33.403118] Freed by task 214: [ 33.403562] kasan_save_stack+0x22/0x50 [ 33.404108] kasan_set_track+0x25/0x30 [ 33.404655] kasan_save_free_info+0x2b/0x50 [ 33.405226] __kasan_slab_free+0x10a/0x190 [ 33.405793] kmem_cache_free+0x10d/0x4d0 [ 33.406462] rcu_core+0x8c8/0x2860 [ 33.406937] __do_softirq+0x1b7/0x7d4 [ 33.407444] [ 33.407675] Last potentially related work creation: [ 33.408300] kasan_save_stack+0x22/0x50 [ 33.408850] __kasan_record_aux_stack+0x8e/0xa0 [ 33.409466] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.410160] remove_vma+0x139/0x170 [ 33.410642] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.411238] do_vmi_munmap+0x1f1/0x2b0 [ 33.411755] __vm_munmap+0x138/0x3a0 [ 33.412254] __x64_sys_munmap+0x59/0x80 [ 33.412791] do_syscall_64+0x3f/0x90 [ 33.413295] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.413979] [ 33.414228] The buggy address belongs to the object at ffff888016b84bc8 [ 33.414228] which belongs to the cache vm_area_struct of size 168 [ 33.415794] The buggy address is located 88 bytes inside of [ 33.415794] freed 168-byte region [ffff888016b84bc8, ffff888016b84c70) [ 33.417268] [ 33.417499] The buggy address belongs to the physical page: [ 33.418201] page:000000005cde5c9c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16b84 [ 33.419360] memcg:ffff88800db11f01 [ 33.419810] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.420487] page_type: 0xffffffff() [ 33.420965] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 33.421944] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800db11f01 [ 33.422922] page dumped because: kasan: bad access detected [ 33.423630] [ 33.423865] Memory state around the buggy address: [ 33.424482] ffff888016b84b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.425391] ffff888016b84b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 33.426310] >ffff888016b84c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 33.427217] ^ [ 33.427788] ffff888016b84c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 33.428697] ffff888016b84d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 33.429604] ================================================================== [ 33.430827] Disabling lock debugging due to kernel taint [ 35.820616] BUG: Bad rss-counter state mm:000000005edf0719 type:MM_FILEPAGES val:33 [ 35.821873] BUG: Bad rss-counter state mm:000000005edf0719 type:MM_ANONPAGES val:22 [ 36.274057] BUG: Bad rss-counter state mm:00000000fe0483b6 type:MM_FILEPAGES val:33 [ 36.275242] BUG: Bad rss-counter state mm:00000000fe0483b6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:45265' (ECDSA) to the list of known hosts. 2023/06/19 12:08:40 fuzzer started 2023/06/19 12:08:40 dialing manager at localhost:44161 2023/06/19 12:08:40 checking machine... 2023/06/19 12:08:40 checking revisions... [ 36.901092] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:08:40 testing simple program... [ 36.951132] cgroup: Unknown subsys name 'net' [ 36.998369] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:08:38 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=0000000000000000 RCX=0000000080000000 RDX=ffff88800f6751c0 RSI=ffffffff83ab4224 RDI=0000000000000005 RBP=0000000000000000 RSP=ffff88801031f500 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000ad500000ad5 R12=0000000000000000 R13=000000000000004f R14=dffffc0000000000 R15=ffffffff87f94640 RIP=ffffffff814c07f1 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 00007fa19d6cb900 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=00007ffd56135000 CR3=000000000eed0000 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=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007ff6937483e0 CR3=000000000ef20000 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=2039333a38303a3231203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039333a38303a3231203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000