syzkaller login: [ 38.691677] BUG: Bad rss-counter state mm:00000000530d152c type:MM_FILEPAGES val:33 [ 38.693264] BUG: Bad rss-counter state mm:00000000530d152c type:MM_ANONPAGES val:22 [ 38.851723] ================================================================== [ 38.852623] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.853574] Read of size 8 at addr ffff8880102d9d08 by task sshd/226 [ 38.854337] [ 38.854556] CPU: 0 PID: 226 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.855541] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.856515] Call Trace: [ 38.856837] [ 38.857120] dump_stack_lvl+0x91/0xf0 [ 38.857633] print_report+0xcc/0x620 [ 38.858119] ? __virt_addr_valid+0x102/0x340 [ 38.858673] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.859333] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.859949] kasan_report+0xbe/0xf0 [ 38.860428] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.861052] vma_interval_tree_remove+0xc75/0xec0 [ 38.861654] vma_prepare+0xc54/0x11a0 [ 38.862134] __split_vma+0x5af/0x950 [ 38.862609] ? __pfx___split_vma+0x10/0x10 [ 38.863160] ? find_held_lock+0x2c/0x110 [ 38.863683] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.864251] ? lock_is_held_type+0x9f/0x120 [ 38.864790] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.865397] ? mtree_range_walk+0x632/0x900 [ 38.865951] ? mas_walk+0x5c7/0x7c0 [ 38.866425] do_vmi_munmap+0x1f1/0x2b0 [ 38.866940] mmap_region+0x1f9/0x2660 [ 38.867417] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.867925] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.868637] ? __pfx_lock_acquire+0x10/0x10 [ 38.869170] ? __pfx_mmap_region+0x10/0x10 [ 38.869699] ? security_mmap_addr+0x7d/0xa0 [ 38.870229] ? get_unmapped_area+0x1f5/0x3f0 [ 38.870779] do_mmap+0x854/0xf00 [ 38.871231] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.871728] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.872293] ksys_mmap_pgoff+0x3af/0x500 [ 38.872808] do_syscall_64+0x3f/0x90 [ 38.873287] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.873933] RIP: 0033:0x7f6e662bad82 [ 38.874392] 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 [ 38.876536] RSP: 002b:00007ffce96ee478 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.877445] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6e662bad82 [ 38.878294] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6e656f4000 [ 38.879146] RBP: 00007f6e656f4000 R08: 0000000000000009 R09: 0000000000001000 [ 38.880011] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fc84b57ec0 [ 38.880874] R13: 00007ffce96ee490 R14: 00007ffce96ee4c0 R15: 00007ffce96ee820 [ 38.881751] [ 38.882047] [ 38.882266] Allocated by task 219: [ 38.882698] kasan_save_stack+0x22/0x50 [ 38.883207] kasan_set_track+0x25/0x30 [ 38.883701] __kasan_slab_alloc+0x59/0x70 [ 38.884240] kmem_cache_alloc+0x16b/0x370 [ 38.884774] vm_area_dup+0x20/0x160 [ 38.885241] __split_vma+0x170/0x950 [ 38.885702] split_vma+0xc6/0x110 [ 38.886147] mprotect_fixup+0x8d2/0xb30 [ 38.886656] do_mprotect_pkey+0x87e/0xd40 [ 38.887196] __x64_sys_mprotect+0x78/0xc0 [ 38.887737] do_syscall_64+0x3f/0x90 [ 38.888216] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.888887] [ 38.889106] Freed by task 219: [ 38.889506] kasan_save_stack+0x22/0x50 [ 38.890024] kasan_set_track+0x25/0x30 [ 38.890533] kasan_save_free_info+0x2b/0x50 [ 38.891095] __kasan_slab_free+0x10a/0x190 [ 38.891636] kmem_cache_free+0x10d/0x4d0 [ 38.892165] rcu_core+0x8c8/0x2860 [ 38.892619] __do_softirq+0x1b7/0x7d4 [ 38.893109] [ 38.893326] Last potentially related work creation: [ 38.893924] kasan_save_stack+0x22/0x50 [ 38.894442] __kasan_record_aux_stack+0x8e/0xa0 [ 38.895043] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.895692] remove_vma+0x139/0x170 [ 38.896147] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.896714] do_vmi_munmap+0x1f1/0x2b0 [ 38.897211] __vm_munmap+0x138/0x3a0 [ 38.897687] __x64_sys_munmap+0x59/0x80 [ 38.898199] do_syscall_64+0x3f/0x90 [ 38.898683] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.899336] [ 38.899556] The buggy address belongs to the object at ffff8880102d9cb0 [ 38.899556] which belongs to the cache vm_area_struct of size 168 [ 38.901044] The buggy address is located 88 bytes inside of [ 38.901044] freed 168-byte region [ffff8880102d9cb0, ffff8880102d9d58) [ 38.902481] [ 38.902699] The buggy address belongs to the physical page: [ 38.903382] page:00000000a53acd58 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102d9 [ 38.904488] memcg:ffff88800b35ed01 [ 38.904928] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.905588] page_type: 0xffffffff() [ 38.906046] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 38.906995] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800b35ed01 [ 38.907905] page dumped because: kasan: bad access detected [ 38.908584] [ 38.908800] Memory state around the buggy address: [ 38.909409] ffff8880102d9c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 38.910272] ffff8880102d9c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 38.911152] >ffff8880102d9d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 38.912021] ^ [ 38.912460] ffff8880102d9d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 38.913347] ffff8880102d9e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 38.914225] ================================================================== [ 38.915213] Disabling lock debugging due to kernel taint [ 41.888681] BUG: Bad rss-counter state mm:0000000016c13a21 type:MM_FILEPAGES val:33 [ 41.890193] BUG: Bad rss-counter state mm:0000000016c13a21 type:MM_ANONPAGES val:22 [ 42.371735] BUG: Bad rss-counter state mm:00000000e0371b39 type:MM_FILEPAGES val:33 [ 42.372844] BUG: Bad rss-counter state mm:00000000e0371b39 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:17583' (ECDSA) to the list of known hosts. 2023/06/20 11:09:00 fuzzer started 2023/06/20 11:09:01 dialing manager at localhost:36067 2023/06/20 11:09:01 checking machine... 2023/06/20 11:09:01 checking revisions... [ 43.092234] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:09:01 testing simple program... [ 43.140873] cgroup: Unknown subsys name 'net' [ 43.186968] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:09:00 Registers: info registers vcpu 0 RAX=00007ffc4798eee0 RBX=0000000000000000 RCX=000000000000001e RDX=00007ffc4798eec0 RSI=0000000000000025 RDI=00007fbfd45bc060 RBP=00007ffc4798ed70 RSP=00007ffc4798e818 R8 =0000000000000000 R9 =00005606c51af770 R10=0000000000000001 R11=0000000000000000 R12=00007ffc4798ed80 R13=00007fbfd45bc07e R14=00007ffc4798eec0 R15=00000000fbad8000 RIP=00007fbfd4b6775b RFL=00000206 [-----P-] 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 00007fbfd4614900 00000000 00000000 GS =0000 0000000000000000 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=00007fbfd4bcc0b0 CR3=000000000e5dc000 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=00007ffc4798efa00000003000000018 XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=6d2064656d726f6620796c646162006e XMM09=00000000000000000000000000000000 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=00007ff89d4eb330 CR3=0000000019f06000 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=2030303a39303a3131203032206e754a XMM01=73732878696e755f6d6170203a5d3633 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3633325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030303a39303a3131203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000