syzkaller login: [ 28.717626] BUG: Bad rss-counter state mm:00000000d4cbfdce type:MM_FILEPAGES val:33 [ 28.719001] BUG: Bad rss-counter state mm:00000000d4cbfdce type:MM_ANONPAGES val:22 [ 28.870465] ================================================================== [ 28.871373] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.872322] Read of size 8 at addr ffff88800d62a968 by task sshd/220 [ 28.873177] [ 28.873425] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.874285] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.875310] Call Trace: [ 28.875650] [ 28.875936] dump_stack_lvl+0x91/0xf0 [ 28.876431] print_report+0xcc/0x620 [ 28.876915] ? __virt_addr_valid+0x102/0x340 [ 28.877466] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.878084] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.878702] kasan_report+0xbe/0xf0 [ 28.879197] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.879855] vma_interval_tree_remove+0xc75/0xec0 [ 28.880475] vma_prepare+0xc54/0x11a0 [ 28.880951] __split_vma+0x5af/0x950 [ 28.881441] ? __pfx___split_vma+0x10/0x10 [ 28.881973] ? find_held_lock+0x2c/0x110 [ 28.882496] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.883056] ? lock_is_held_type+0x9f/0x120 [ 28.883661] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.884274] ? mtree_range_walk+0x632/0x900 [ 28.884838] ? mas_walk+0x5c7/0x7c0 [ 28.885328] do_vmi_munmap+0x1f1/0x2b0 [ 28.885831] mmap_region+0x1f9/0x2660 [ 28.886314] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.886829] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.887590] ? __pfx_lock_acquire+0x10/0x10 [ 28.888135] ? __pfx_mmap_region+0x10/0x10 [ 28.888664] ? security_mmap_addr+0x7d/0xa0 [ 28.889197] ? get_unmapped_area+0x1f5/0x3f0 [ 28.889749] do_mmap+0x854/0xf00 [ 28.890200] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.890693] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.891296] ksys_mmap_pgoff+0x3af/0x500 [ 28.891834] do_syscall_64+0x3f/0x90 [ 28.892316] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.892965] RIP: 0033:0x7f274a1bfd82 [ 28.893420] 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 [ 28.895617] RSP: 002b:00007ffed40315b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.896535] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f274a1bfd82 [ 28.897400] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f27495f9000 [ 28.898251] RBP: 00007f27495f9000 R08: 0000000000000009 R09: 0000000000001000 [ 28.899099] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556614019f70 [ 28.900003] R13: 00007ffed40315d0 R14: 00007ffed4031600 R15: 00007ffed4031960 [ 28.900861] [ 28.901153] [ 28.901370] Allocated by task 213: [ 28.901799] kasan_save_stack+0x22/0x50 [ 28.902308] kasan_set_track+0x25/0x30 [ 28.902806] __kasan_slab_alloc+0x59/0x70 [ 28.903365] kmem_cache_alloc+0x16b/0x370 [ 28.903906] vm_area_dup+0x20/0x160 [ 28.904366] __split_vma+0x170/0x950 [ 28.904840] split_vma+0xc6/0x110 [ 28.905281] mprotect_fixup+0x8d2/0xb30 [ 28.905788] do_mprotect_pkey+0x87e/0xd40 [ 28.906317] __x64_sys_mprotect+0x78/0xc0 [ 28.906836] do_syscall_64+0x3f/0x90 [ 28.907354] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.908023] [ 28.908241] Freed by task 213: [ 28.908635] kasan_save_stack+0x22/0x50 [ 28.909140] kasan_set_track+0x25/0x30 [ 28.909635] kasan_save_free_info+0x2b/0x50 [ 28.910170] __kasan_slab_free+0x10a/0x190 [ 28.910707] kmem_cache_free+0x10d/0x4d0 [ 28.911250] rcu_core+0x8c8/0x2860 [ 28.911719] __do_softirq+0x1b7/0x7d4 [ 28.912208] [ 28.912423] Last potentially related work creation: [ 28.913011] kasan_save_stack+0x22/0x50 [ 28.913523] __kasan_record_aux_stack+0x8e/0xa0 [ 28.914107] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.914773] remove_vma+0x139/0x170 [ 28.915266] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.915851] do_vmi_munmap+0x1f1/0x2b0 [ 28.916352] __vm_munmap+0x138/0x3a0 [ 28.916820] __x64_sys_munmap+0x59/0x80 [ 28.917321] do_syscall_64+0x3f/0x90 [ 28.917804] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.918451] [ 28.918670] The buggy address belongs to the object at ffff88800d62a910 [ 28.918670] which belongs to the cache vm_area_struct of size 168 [ 28.920238] The buggy address is located 88 bytes inside of [ 28.920238] freed 168-byte region [ffff88800d62a910, ffff88800d62a9b8) [ 28.921654] [ 28.921870] The buggy address belongs to the physical page: [ 28.922540] page:00000000693f608a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd62a [ 28.923694] memcg:ffff88800e26c301 [ 28.924129] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 28.924840] page_type: 0xffffffff() [ 28.925303] raw: 0100000000000200 ffff8880087a0c80 ffffea0000318440 dead000000000009 [ 28.926224] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e26c301 [ 28.927137] page dumped because: kasan: bad access detected [ 28.927854] [ 28.928070] Memory state around the buggy address: [ 28.928655] ffff88800d62a800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 28.929523] ffff88800d62a880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 28.930395] >ffff88800d62a900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.931293] ^ [ 28.932093] ffff88800d62a980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 28.932966] ffff88800d62aa00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.933818] ================================================================== [ 28.934964] Disabling lock debugging due to kernel taint [ 30.547492] BUG: Bad rss-counter state mm:00000000d2e76893 type:MM_FILEPAGES val:33 [ 30.548076] BUG: Bad rss-counter state mm:00000000d2e76893 type:MM_ANONPAGES val:22 [ 30.987202] BUG: Bad rss-counter state mm:00000000e6519239 type:MM_FILEPAGES val:33 [ 30.987897] BUG: Bad rss-counter state mm:00000000e6519239 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:10042' (ECDSA) to the list of known hosts. 2023/06/20 22:23:11 fuzzer started 2023/06/20 22:23:11 dialing manager at localhost:36067 2023/06/20 22:23:11 checking machine... 2023/06/20 22:23:11 checking revisions... [ 31.625887] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:23:11 testing simple program... [ 31.678743] cgroup: Unknown subsys name 'net' [ 31.717600] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:23:10 Registers: info registers vcpu 0 RAX=1ffff11003205f5d RBX=0000000000000001 RCX=0000000000000001 RDX=0000000000000cc0 RSI=000000000000000d RDI=ffff88801902fae8 RBP=dffffc0000000000 RSP=ffff88801902fa50 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=000000000000000d R13=0000000000000cc0 R14=ffff88801902fae0 R15=0000000000000cc0 RIP=ffffffff813ad61a 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 00007f76dda06900 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=00007ffcab37d000 CR3=0000000015aa8000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff 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=00007f5c9e6cd670 CR3=000000000d5fa000 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=6a05710febad1ea8d5450ed269e84e82 XMM02=0000000000119620ec2efd57dc4c00df XMM03=00000000001213384674b03aa01e1c57 XMM04=ac7200a2a8b50d2b00000000000ae988 XMM05=19e9129bd510f23500000000001311d0 XMM06=fda8358b8491c7590000000000130038 XMM07=e042d86d42eb936e00000000001215b8 XMM08=4674b03aa01e1c570000000000119680 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000