syzkaller login: [ 30.593207] BUG: Bad rss-counter state mm:00000000213c9c6e type:MM_FILEPAGES val:33 [ 30.594417] BUG: Bad rss-counter state mm:00000000213c9c6e type:MM_ANONPAGES val:22 [ 30.632638] ================================================================== [ 30.633604] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.634527] Read of size 8 at addr ffff88800c5c23f8 by task sshd/222 [ 30.635282] [ 30.635502] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.636383] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.637373] Call Trace: [ 30.637693] [ 30.637975] dump_stack_lvl+0x91/0xf0 [ 30.638472] print_report+0xcc/0x620 [ 30.638956] ? __virt_addr_valid+0x102/0x340 [ 30.639500] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.640118] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.640737] kasan_report+0xbe/0xf0 [ 30.641214] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.641826] vma_interval_tree_remove+0xc75/0xec0 [ 30.642429] vma_prepare+0xc54/0x11a0 [ 30.643001] __split_vma+0x5af/0x950 [ 30.643508] ? __pfx___split_vma+0x10/0x10 [ 30.644059] ? find_held_lock+0x2c/0x110 [ 30.644584] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.645149] ? lock_is_held_type+0x9f/0x120 [ 30.645695] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.646302] ? mtree_range_walk+0x632/0x900 [ 30.646853] ? mas_walk+0x5c7/0x7c0 [ 30.647324] do_vmi_munmap+0x1f1/0x2b0 [ 30.647817] mmap_region+0x1f9/0x2660 [ 30.648308] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.648821] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.649530] ? __pfx_lock_acquire+0x10/0x10 [ 30.650063] ? __pfx_mmap_region+0x10/0x10 [ 30.650589] ? security_mmap_addr+0x7d/0xa0 [ 30.651130] ? get_unmapped_area+0x1f5/0x3f0 [ 30.651679] do_mmap+0x854/0xf00 [ 30.652143] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.652649] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.653207] ksys_mmap_pgoff+0x3af/0x500 [ 30.653710] do_syscall_64+0x3f/0x90 [ 30.654186] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.654830] RIP: 0033:0x7f08da35fd82 [ 30.655304] 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 [ 30.657457] RSP: 002b:00007ffe5d76bb98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.658368] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f08da35fd82 [ 30.659222] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f08d9799000 [ 30.660082] RBP: 00007f08d9799000 R08: 0000000000000009 R09: 0000000000001000 [ 30.660926] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fd5a7b7f70 [ 30.661769] R13: 00007ffe5d76bbb0 R14: 00007ffe5d76bbe0 R15: 00007ffe5d76bf40 [ 30.662624] [ 30.662914] [ 30.663128] Allocated by task 215: [ 30.663557] kasan_save_stack+0x22/0x50 [ 30.664074] kasan_set_track+0x25/0x30 [ 30.664565] __kasan_slab_alloc+0x59/0x70 [ 30.665086] kmem_cache_alloc+0x16b/0x370 [ 30.665603] vm_area_dup+0x20/0x160 [ 30.666053] __split_vma+0x170/0x950 [ 30.666514] split_vma+0xc6/0x110 [ 30.666949] mprotect_fixup+0x8d2/0xb30 [ 30.667454] do_mprotect_pkey+0x87e/0xd40 [ 30.667975] __x64_sys_mprotect+0x78/0xc0 [ 30.668494] do_syscall_64+0x3f/0x90 [ 30.668960] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.669602] [ 30.669821] Freed by task 215: [ 30.670213] kasan_save_stack+0x22/0x50 [ 30.670713] kasan_set_track+0x25/0x30 [ 30.671204] kasan_save_free_info+0x2b/0x50 [ 30.671728] __kasan_slab_free+0x10a/0x190 [ 30.672275] kmem_cache_free+0x10d/0x4d0 [ 30.672784] rcu_core+0x8c8/0x2860 [ 30.673223] __do_softirq+0x1b7/0x7d4 [ 30.673698] [ 30.673915] Last potentially related work creation: [ 30.674494] kasan_save_stack+0x22/0x50 [ 30.674996] __kasan_record_aux_stack+0x8e/0xa0 [ 30.675566] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.676213] remove_vma+0x139/0x170 [ 30.676663] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.677215] do_vmi_munmap+0x1f1/0x2b0 [ 30.677698] __vm_munmap+0x138/0x3a0 [ 30.678158] __x64_sys_munmap+0x59/0x80 [ 30.678652] do_syscall_64+0x3f/0x90 [ 30.679121] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.679765] [ 30.679994] The buggy address belongs to the object at ffff88800c5c23a0 [ 30.679994] which belongs to the cache vm_area_struct of size 168 [ 30.681464] The buggy address is located 88 bytes inside of [ 30.681464] freed 168-byte region [ffff88800c5c23a0, ffff88800c5c2448) [ 30.682865] [ 30.683083] The buggy address belongs to the physical page: [ 30.683744] page:00000000e93449bf refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc5c2 [ 30.684838] memcg:ffff88801972a401 [ 30.685260] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.685906] page_type: 0xffffffff() [ 30.686354] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.687263] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801972a401 [ 30.688177] page dumped because: kasan: bad access detected [ 30.688839] [ 30.689053] Memory state around the buggy address: [ 30.689628] ffff88800c5c2280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 30.690477] ffff88800c5c2300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 30.691329] >ffff88800c5c2380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.692195] ^ [ 30.693037] ffff88800c5c2400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.693893] ffff88800c5c2480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.694737] ================================================================== [ 30.695868] Disabling lock debugging due to kernel taint [ 32.572947] BUG: Bad rss-counter state mm:00000000bf781265 type:MM_FILEPAGES val:33 [ 32.573920] BUG: Bad rss-counter state mm:00000000bf781265 type:MM_ANONPAGES val:22 [ 33.057818] BUG: Bad rss-counter state mm:00000000a2261411 type:MM_FILEPAGES val:33 [ 33.058778] BUG: Bad rss-counter state mm:00000000a2261411 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:30807' (ECDSA) to the list of known hosts. 2023/06/20 22:07:22 fuzzer started 2023/06/20 22:07:22 dialing manager at localhost:36067 2023/06/20 22:07:22 checking machine... 2023/06/20 22:07:22 checking revisions... [ 33.787867] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:07:22 testing simple program... [ 33.840181] cgroup: Unknown subsys name 'net' [ 33.906922] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:07:22 Registers: info registers vcpu 0 RAX=ffff88806c400000 RBX=0000000070bc7a71 RCX=ffff88806ca3d388 RDX=000000000000000c RSI=0000000000000003 RDI=00000000d8d143c3 RBP=ffff88800f60dff0 RSP=ffff888017a87a70 R8 =000000004f184d50 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000001 R13=0000000000000800 R14=ffff888017a87af8 R15=000000000000000c RIP=ffffffff822704d3 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 00007fcc5319e900 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=00007fcc537560b0 CR3=000000000deec000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=00005571e5837d60 RCX=0000000000000001 RDX=0000000000000003 RSI=00005571e583de20 RDI=0000000000000002 RBP=0000000000000001 RSP=00007ffde398a480 R8 =0000000000000000 R9 =00000000000aead0 R10=0000000000000002 R11=00007f3ae4717c30 R12=00005571e583de20 R13=0000000000000001 R14=00000000000aead0 R15=0000000000000000 RIP=00007f3ae5d8b645 RFL=00000297 [--S-APC] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f3ae51f9900 00000000 00000000 GS =0000 0000000000000000 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=00007f3ae4606570 CR3=000000000d6ac000 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=b3285ca56c489dff000000000010ae80 XMM01=d2a0560e29a10ea38f40487fd7ddf306 XMM02=ec2efd57dc4c00df000000000011b2a8 XMM03=80f2780e72f6f014000000000011b378 XMM04=0aa354853ec04c9200000000000ae988 XMM05=b93fc9e1eff3583c00000000001334e8 XMM06=00c3ffa147b8d8570000000000132588 XMM07=e042d86d42eb936e0000000000122b30 XMM08=80f2780e72f6f014000000000011b378 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000