syzkaller login: [ 32.285675] BUG: Bad rss-counter state mm:000000002e83c071 type:MM_FILEPAGES val:33 [ 32.286900] BUG: Bad rss-counter state mm:000000002e83c071 type:MM_ANONPAGES val:22 [ 32.421915] ================================================================== [ 32.422995] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.423935] Read of size 8 at addr ffff88800e128b38 by task sshd/221 [ 32.424818] [ 32.425034] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.425904] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.426899] Call Trace: [ 32.427219] [ 32.427503] dump_stack_lvl+0x91/0xf0 [ 32.427997] print_report+0xcc/0x620 [ 32.428484] ? __virt_addr_valid+0x102/0x340 [ 32.429042] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.429657] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.430284] kasan_report+0xbe/0xf0 [ 32.430758] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.431381] vma_interval_tree_remove+0xc75/0xec0 [ 32.431996] vma_prepare+0xc54/0x11a0 [ 32.432483] __split_vma+0x5af/0x950 [ 32.432957] ? __pfx___split_vma+0x10/0x10 [ 32.433484] ? find_held_lock+0x2c/0x110 [ 32.434013] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.434603] ? lock_is_held_type+0x9f/0x120 [ 32.435138] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.435734] ? mtree_range_walk+0x632/0x900 [ 32.436279] ? mas_walk+0x5c7/0x7c0 [ 32.436750] do_vmi_munmap+0x1f1/0x2b0 [ 32.437246] mmap_region+0x1f9/0x2660 [ 32.437721] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.438244] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.438952] ? __pfx_lock_acquire+0x10/0x10 [ 32.439484] ? __pfx_mmap_region+0x10/0x10 [ 32.440013] ? security_mmap_addr+0x7d/0xa0 [ 32.440541] ? get_unmapped_area+0x1f5/0x3f0 [ 32.441086] do_mmap+0x854/0xf00 [ 32.441519] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.442007] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.442569] ksys_mmap_pgoff+0x3af/0x500 [ 32.443075] do_syscall_64+0x3f/0x90 [ 32.443545] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.444183] RIP: 0033:0x7f1192014d82 [ 32.444632] 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 [ 32.446733] RSP: 002b:00007ffe331d7668 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.447638] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1192014d82 [ 32.448473] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f119144e000 [ 32.449306] RBP: 00007f119144e000 R08: 0000000000000009 R09: 0000000000001000 [ 32.450149] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c6138d1ec0 [ 32.450985] R13: 00007ffe331d7680 R14: 00007ffe331d76b0 R15: 00007ffe331d7a10 [ 32.451836] [ 32.452126] [ 32.452342] Allocated by task 213: [ 32.452761] kasan_save_stack+0x22/0x50 [ 32.453261] kasan_set_track+0x25/0x30 [ 32.453752] __kasan_slab_alloc+0x59/0x70 [ 32.454276] kmem_cache_alloc+0x16b/0x370 [ 32.454785] vm_area_dup+0x20/0x160 [ 32.455238] __split_vma+0x170/0x950 [ 32.455697] split_vma+0xc6/0x110 [ 32.456147] mprotect_fixup+0x8d2/0xb30 [ 32.456657] do_mprotect_pkey+0x87e/0xd40 [ 32.457177] __x64_sys_mprotect+0x78/0xc0 [ 32.457689] do_syscall_64+0x3f/0x90 [ 32.458181] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.458820] [ 32.459032] Freed by task 19: [ 32.459415] kasan_save_stack+0x22/0x50 [ 32.459914] kasan_set_track+0x25/0x30 [ 32.460408] kasan_save_free_info+0x2b/0x50 [ 32.460939] __kasan_slab_free+0x10a/0x190 [ 32.461473] kmem_cache_free+0x10d/0x4d0 [ 32.461983] rcu_core+0x8c8/0x2860 [ 32.462434] __do_softirq+0x1b7/0x7d4 [ 32.462911] [ 32.463130] Last potentially related work creation: [ 32.463706] kasan_save_stack+0x22/0x50 [ 32.464206] __kasan_record_aux_stack+0x8e/0xa0 [ 32.464780] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.465480] remove_vma+0x139/0x170 [ 32.465934] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.466502] do_vmi_munmap+0x1f1/0x2b0 [ 32.466990] __vm_munmap+0x138/0x3a0 [ 32.467450] __x64_sys_munmap+0x59/0x80 [ 32.467943] do_syscall_64+0x3f/0x90 [ 32.468413] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.469044] [ 32.469258] Second to last potentially related work creation: [ 32.469940] kasan_save_stack+0x22/0x50 [ 32.470448] __kasan_record_aux_stack+0x8e/0xa0 [ 32.471019] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.471653] remove_vma+0x139/0x170 [ 32.472104] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.472681] do_vmi_munmap+0x1f1/0x2b0 [ 32.473172] mmap_region+0x1f9/0x2660 [ 32.473647] do_mmap+0x854/0xf00 [ 32.474073] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.474584] ksys_mmap_pgoff+0x3af/0x500 [ 32.475087] do_syscall_64+0x3f/0x90 [ 32.475564] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.476195] [ 32.476410] The buggy address belongs to the object at ffff88800e128ae0 [ 32.476410] which belongs to the cache vm_area_struct of size 168 [ 32.477863] The buggy address is located 88 bytes inside of [ 32.477863] freed 168-byte region [ffff88800e128ae0, ffff88800e128b88) [ 32.479256] [ 32.479471] The buggy address belongs to the physical page: [ 32.480121] page:00000000e869a365 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe128 [ 32.481182] memcg:ffff88800e639701 [ 32.481606] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.482251] page_type: 0xffffffff() [ 32.482697] raw: 0100000000000200 ffff88800879fc80 ffffea0000356480 dead000000000008 [ 32.483598] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e639701 [ 32.484488] page dumped because: kasan: bad access detected [ 32.485137] [ 32.485352] Memory state around the buggy address: [ 32.485919] ffff88800e128a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.486782] ffff88800e128a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 32.487634] >ffff88800e128b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.488481] ^ [ 32.489082] ffff88800e128b80: fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 [ 32.489929] ffff88800e128c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 32.490778] ================================================================== [ 32.491692] Disabling lock debugging due to kernel taint [ 34.447617] BUG: Bad rss-counter state mm:0000000092e2bcd1 type:MM_FILEPAGES val:33 [ 34.448609] BUG: Bad rss-counter state mm:0000000092e2bcd1 type:MM_ANONPAGES val:22 [ 34.957157] BUG: Bad rss-counter state mm:00000000a054f890 type:MM_FILEPAGES val:33 [ 34.958363] BUG: Bad rss-counter state mm:00000000a054f890 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:1868' (ECDSA) to the list of known hosts. 2023/06/19 23:44:00 fuzzer started 2023/06/19 23:44:00 dialing manager at localhost:44161 2023/06/19 23:44:00 checking machine... 2023/06/19 23:44:00 checking revisions... [ 35.600034] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:44:00 testing simple program... [ 35.648852] cgroup: Unknown subsys name 'net' [ 35.685782] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:43:58 Registers: info registers vcpu 0 RAX=ffffffff8180996f RBX=ffffffff85dfc6a8 RCX=ffffffff8180995c RDX=0000000000000000 RSI=ffffffff86137004 RDI=ffffffff85dfc6a4 RBP=ffffffff85dfc6a8 RSP=ffff88806ce099c0 R8 =ffffffff86137004 R9 =ffff88806ce09ab8 R10=0000000000038001 R11=0000000000020cb4 R12=ffffffff85dfc6a8 R13=ffffffff85dfc6a4 R14=ffffffff85dfc6a4 R15=dffffc0000000000 RIP=ffffffff8112fc99 RFL=00000297 [--S-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 00007fd4911aa900 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=00007f1ba07f2600 CR3=000000000eab2000 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=3f44596223caddb3e040b0a56939dd4c XMM02=2c67c8bc2e329bc3000000000011d068 XMM03=fb795ef6d657705600000000001245e0 XMM04=a1aa45f893a19ee700000000000ae988 XMM05=e4cb8bb95a7664b60000000000135428 XMM06=d07b35b5818b5e070000000000134290 XMM07=e042d86d42eb936e0000000000124860 XMM08=bc027f6bdf1f8ad9000000000011d0c8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 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=00007fff6f93f6e8 CR3=0000000016a50000 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=2030303a34343a3332203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039353a33343a3332203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000