syzkaller login: [ 29.324532] BUG: Bad rss-counter state mm:00000000c0194f4a type:MM_FILEPAGES val:33 [ 29.325775] BUG: Bad rss-counter state mm:00000000c0194f4a type:MM_ANONPAGES val:22 [ 29.365245] ================================================================== [ 29.366297] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.367255] Read of size 8 at addr ffff88800f276880 by task sshd/219 [ 29.368198] [ 29.368414] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 29.369271] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.370270] Call Trace: [ 29.370594] [ 29.370877] dump_stack_lvl+0x91/0xf0 [ 29.371386] print_report+0xcc/0x620 [ 29.371862] ? __virt_addr_valid+0x102/0x340 [ 29.372411] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.373033] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.373653] kasan_report+0xbe/0xf0 [ 29.374126] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.374746] vma_interval_tree_remove+0xc75/0xec0 [ 29.375349] vma_prepare+0xc54/0x11a0 [ 29.375830] __split_vma+0x5af/0x950 [ 29.376303] ? __pfx___split_vma+0x10/0x10 [ 29.376837] ? find_held_lock+0x2c/0x110 [ 29.377361] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.377926] ? lock_is_held_type+0x9f/0x120 [ 29.378464] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.379092] ? mtree_range_walk+0x632/0x900 [ 29.379647] ? mas_walk+0x5c7/0x7c0 [ 29.380125] do_vmi_munmap+0x1f1/0x2b0 [ 29.380618] mmap_region+0x1f9/0x2660 [ 29.381099] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.381619] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.382342] ? __pfx_lock_acquire+0x10/0x10 [ 29.382881] ? __pfx_mmap_region+0x10/0x10 [ 29.383415] ? security_mmap_addr+0x7d/0xa0 [ 29.383950] ? get_unmapped_area+0x1f5/0x3f0 [ 29.384514] do_mmap+0x854/0xf00 [ 29.384956] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.385449] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.386019] ksys_mmap_pgoff+0x3af/0x500 [ 29.386530] do_syscall_64+0x3f/0x90 [ 29.387008] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.387678] RIP: 0033:0x7f5d9d627d82 [ 29.388137] 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 [ 29.390267] RSP: 002b:00007ffd96c3bfc8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.391190] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5d9d627d82 [ 29.392041] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5d9ca61000 [ 29.392891] RBP: 00007f5d9ca61000 R08: 0000000000000009 R09: 0000000000001000 [ 29.393751] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564d6eecbec0 [ 29.394607] R13: 00007ffd96c3bfe0 R14: 00007ffd96c3c010 R15: 00007ffd96c3c370 [ 29.395494] [ 29.395788] [ 29.396003] Allocated by task 212: [ 29.396436] kasan_save_stack+0x22/0x50 [ 29.396933] kasan_set_track+0x25/0x30 [ 29.397425] __kasan_slab_alloc+0x59/0x70 [ 29.397959] kmem_cache_alloc+0x16b/0x370 [ 29.398470] vm_area_dup+0x20/0x160 [ 29.398919] __split_vma+0x170/0x950 [ 29.399404] split_vma+0xc6/0x110 [ 29.399845] mprotect_fixup+0x8d2/0xb30 [ 29.400354] do_mprotect_pkey+0x87e/0xd40 [ 29.400875] __x64_sys_mprotect+0x78/0xc0 [ 29.401395] do_syscall_64+0x3f/0x90 [ 29.401882] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.402519] [ 29.402735] Freed by task 13: [ 29.403131] kasan_save_stack+0x22/0x50 [ 29.403636] kasan_set_track+0x25/0x30 [ 29.404128] kasan_save_free_info+0x2b/0x50 [ 29.404658] __kasan_slab_free+0x10a/0x190 [ 29.405198] kmem_cache_free+0x10d/0x4d0 [ 29.405707] rcu_core+0x8c8/0x2860 [ 29.406148] __do_softirq+0x1b7/0x7d4 [ 29.406628] [ 29.406847] Last potentially related work creation: [ 29.407458] kasan_save_stack+0x22/0x50 [ 29.407958] __kasan_record_aux_stack+0x8e/0xa0 [ 29.408533] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.409245] remove_vma+0x139/0x170 [ 29.409702] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.410265] do_vmi_munmap+0x1f1/0x2b0 [ 29.410755] __vm_munmap+0x138/0x3a0 [ 29.411235] __x64_sys_munmap+0x59/0x80 [ 29.411740] do_syscall_64+0x3f/0x90 [ 29.412217] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.412848] [ 29.413062] The buggy address belongs to the object at ffff88800f276828 [ 29.413062] which belongs to the cache vm_area_struct of size 168 [ 29.414524] The buggy address is located 88 bytes inside of [ 29.414524] freed 168-byte region [ffff88800f276828, ffff88800f2768d0) [ 29.415957] [ 29.416173] The buggy address belongs to the physical page: [ 29.416841] page:00000000a810d6ee refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf276 [ 29.417937] memcg:ffff88800f2e4e01 [ 29.418370] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 29.419106] page_type: 0xffffffff() [ 29.419566] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 29.420479] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f2e4e01 [ 29.421391] page dumped because: kasan: bad access detected [ 29.422054] [ 29.422267] Memory state around the buggy address: [ 29.422855] ffff88800f276780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 29.423726] ffff88800f276800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 29.424584] >ffff88800f276880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 29.425439] ^ [ 29.425855] ffff88800f276900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 29.426728] ffff88800f276980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc 00 [ 29.427605] ================================================================== [ 29.428617] Disabling lock debugging due to kernel taint [ 31.828735] BUG: Bad rss-counter state mm:00000000868e8e90 type:MM_FILEPAGES val:33 [ 31.829757] BUG: Bad rss-counter state mm:00000000868e8e90 type:MM_ANONPAGES val:22 [ 32.381939] BUG: Bad rss-counter state mm:00000000abfd7fb2 type:MM_FILEPAGES val:33 [ 32.382931] BUG: Bad rss-counter state mm:00000000abfd7fb2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:52471' (ECDSA) to the list of known hosts. 2023/06/19 22:23:58 fuzzer started 2023/06/19 22:23:58 dialing manager at localhost:44161 2023/06/19 22:23:58 checking machine... 2023/06/19 22:23:58 checking revisions... [ 33.015269] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:23:59 testing simple program... [ 33.071402] cgroup: Unknown subsys name 'net' [ 33.138557] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:23:58 Registers: info registers vcpu 0 RAX=ffffffff81ef1c37 RBX=ffffffff85e5cccc RCX=ffffffff81ef1c7b RDX=0000000000000000 RSI=ffffffff861c7916 RDI=ffffffff85e5ccb0 RBP=ffffffff85e5ccc4 RSP=ffff88806ce099e0 R8 =ffffffff861c7916 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000038e37 R12=ffffffff85e5ccd4 R13=ffffffff85e5ccb0 R14=ffffffff85e5ccc0 R15=dffffc0000000000 RIP=ffffffff8112fc99 RFL=00000206 [-----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 00007fdc9908f900 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=00007fdc996470b0 CR3=000000000c4fc000 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=0000000000000050 RBX=ffff888008db0000 RCX=0000000000000000 RDX=0000000000010177 RSI=ffffffff821920cb RDI=0000000000000007 RBP=ffffffff85a237a0 RSP=ffff88800f5673a0 R8 =0000000000000007 R9 =0000000000010000 R10=0000000000010177 R11=0000000000000128 R12=0000000000010177 R13=ffffed10011b6001 R14=dffffc0000000000 R15=ffff888008db0060 RIP=ffffffff821920cf RFL=00000093 [--S-A-C] 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 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=00007fcf987de2a0 CR3=000000000d398000 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=2957df375e339495da471091d8049221 XMM02=ec2efd57dc4c00df000000000011f2b8 XMM03=eb5915a60a28ed98000000000011f388 XMM04=d3f91d8f0df2ecd700000000000ae988 XMM05=028c77b06260b6a700000000001346f8 XMM06=dfcdbad4f1609c3700000000001335b0 XMM07=fb795ef6d65770560000000000123a60 XMM08=2c67c8bc2e329bc3000000000011f328 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000