syzkaller login: [ 32.525850] BUG: Bad rss-counter state mm:0000000032b60049 type:MM_FILEPAGES val:33 [ 32.526944] BUG: Bad rss-counter state mm:0000000032b60049 type:MM_ANONPAGES val:22 [ 32.695476] ================================================================== [ 32.696447] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.697425] Read of size 8 at addr ffff888015b4a3f8 by task sshd/222 [ 32.698232] [ 32.698457] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.699517] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.700504] Call Trace: [ 32.700821] [ 32.701111] dump_stack_lvl+0x91/0xf0 [ 32.701629] print_report+0xcc/0x620 [ 32.702150] ? __virt_addr_valid+0x102/0x340 [ 32.702704] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.703314] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.703937] kasan_report+0xbe/0xf0 [ 32.704420] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.705053] vma_interval_tree_remove+0xc75/0xec0 [ 32.705679] vma_prepare+0xc54/0x11a0 [ 32.706164] __split_vma+0x5af/0x950 [ 32.706642] ? __pfx___split_vma+0x10/0x10 [ 32.707194] ? find_held_lock+0x2c/0x110 [ 32.707747] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.708343] ? lock_is_held_type+0x9f/0x120 [ 32.708897] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.709535] ? mtree_range_walk+0x632/0x900 [ 32.710115] ? mas_walk+0x5c7/0x7c0 [ 32.710617] do_vmi_munmap+0x1f1/0x2b0 [ 32.711130] mmap_region+0x1f9/0x2660 [ 32.711642] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.712178] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.712918] ? __pfx_lock_acquire+0x10/0x10 [ 32.713480] ? __pfx_mmap_region+0x10/0x10 [ 32.714022] ? security_mmap_addr+0x7d/0xa0 [ 32.714577] ? get_unmapped_area+0x1f5/0x3f0 [ 32.715149] do_mmap+0x854/0xf00 [ 32.715599] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.716112] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.716701] ksys_mmap_pgoff+0x3af/0x500 [ 32.717228] do_syscall_64+0x3f/0x90 [ 32.717743] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.718410] RIP: 0033:0x7fe3a20c1d82 [ 32.718889] 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 [ 32.721125] RSP: 002b:00007ffd05bd73d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.722076] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe3a20c1d82 [ 32.722955] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe3a14fb000 [ 32.723831] RBP: 00007fe3a14fb000 R08: 0000000000000009 R09: 0000000000001000 [ 32.724717] R10: 0000000000000812 R11: 0000000000000206 R12: 000056324b037d90 [ 32.725603] R13: 00007ffd05bd73f0 R14: 00007ffd05bd7420 R15: 00007ffd05bd7780 [ 32.726493] [ 32.726796] [ 32.727019] Allocated by task 214: [ 32.727459] kasan_save_stack+0x22/0x50 [ 32.727984] kasan_set_track+0x25/0x30 [ 32.728491] __kasan_slab_alloc+0x59/0x70 [ 32.729034] kmem_cache_alloc+0x16b/0x370 [ 32.729588] vm_area_dup+0x20/0x160 [ 32.730059] __split_vma+0x170/0x950 [ 32.730544] split_vma+0xc6/0x110 [ 32.730997] mprotect_fixup+0x8d2/0xb30 [ 32.731518] do_mprotect_pkey+0x87e/0xd40 [ 32.732058] __x64_sys_mprotect+0x78/0xc0 [ 32.732603] do_syscall_64+0x3f/0x90 [ 32.733093] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.733779] [ 32.734003] Freed by task 214: [ 32.734412] kasan_save_stack+0x22/0x50 [ 32.734938] kasan_set_track+0x25/0x30 [ 32.735447] kasan_save_free_info+0x2b/0x50 [ 32.736002] __kasan_slab_free+0x10a/0x190 [ 32.736553] kmem_cache_free+0x10d/0x4d0 [ 32.737076] rcu_core+0x8c8/0x2860 [ 32.737553] __do_softirq+0x1b7/0x7d4 [ 32.738045] [ 32.738267] Last potentially related work creation: [ 32.738868] kasan_save_stack+0x22/0x50 [ 32.739384] __kasan_record_aux_stack+0x8e/0xa0 [ 32.739980] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.740648] remove_vma+0x139/0x170 [ 32.741119] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.741705] do_vmi_munmap+0x1f1/0x2b0 [ 32.742206] __vm_munmap+0x138/0x3a0 [ 32.742697] __x64_sys_munmap+0x59/0x80 [ 32.743211] do_syscall_64+0x3f/0x90 [ 32.743700] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.744358] [ 32.744579] The buggy address belongs to the object at ffff888015b4a3a0 [ 32.744579] which belongs to the cache vm_area_struct of size 168 [ 32.746120] The buggy address is located 88 bytes inside of [ 32.746120] freed 168-byte region [ffff888015b4a3a0, ffff888015b4a448) [ 32.747585] [ 32.747807] The buggy address belongs to the physical page: [ 32.748487] page:000000004ce910c1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15b4a [ 32.749631] memcg:ffff888015b82401 [ 32.750069] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 32.750790] page_type: 0xffffffff() [ 32.751255] raw: 0100000000000200 ffff88800879fc80 ffffea0000385280 dead000000000007 [ 32.752217] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015b82401 [ 32.753163] page dumped because: kasan: bad access detected [ 32.753868] [ 32.754091] Memory state around the buggy address: [ 32.754687] ffff888015b4a280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 32.755581] ffff888015b4a300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 32.756461] >ffff888015b4a380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 32.757341] ^ [ 32.758238] ffff888015b4a400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 32.759131] ffff888015b4a480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.760015] ================================================================== [ 32.761274] Disabling lock debugging due to kernel taint [ 35.035782] BUG: Bad rss-counter state mm:0000000026947893 type:MM_FILEPAGES val:33 [ 35.037122] BUG: Bad rss-counter state mm:0000000026947893 type:MM_ANONPAGES val:22 [ 35.507187] BUG: Bad rss-counter state mm:000000007e2a3fe6 type:MM_FILEPAGES val:33 [ 35.508412] BUG: Bad rss-counter state mm:000000007e2a3fe6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:3883' (ECDSA) to the list of known hosts. 2023/06/19 16:14:36 fuzzer started 2023/06/19 16:14:36 dialing manager at localhost:44161 2023/06/19 16:14:36 checking machine... 2023/06/19 16:14:36 checking revisions... [ 36.176190] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:14:36 testing simple program... [ 36.227014] cgroup: Unknown subsys name 'net' [ 36.281455] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:14:32 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007faeca7c2000 CR3=000000000cc00000 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=2e881e73cebc709dd34145e886312eba XMM02=ec2efd57dc4c00df000000000011cf30 XMM03=360adf73624a19b3000000000011d000 XMM04=3ffd5eecb2bcd05b00000000000ae988 XMM05=648fecb776657db00000000000134e80 XMM06=00c3ffa147b8d8570000000000133f20 XMM07=fb795ef6d657705600000000001244b0 XMM08=2c67c8bc2e329bc3000000000011cfa0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff8880168e51c0 RBX=0000000000000000 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000000 RDI=ffffffff8450af5f RBP=ffff888016b378f8 RSP=ffff888016b378d0 R8 =0000000000000000 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000000 R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450b9aa RFL=00000046 [---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 00007fe8f6819900 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=00007fe8f6dd10b0 CR3=00000000141c4000 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=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