syzkaller login: [ 30.554580] sshd (213) used greatest stack depth: 24128 bytes left [ 30.556816] BUG: Bad rss-counter state mm:00000000665d793a type:MM_FILEPAGES val:33 [ 30.557906] BUG: Bad rss-counter state mm:00000000665d793a type:MM_ANONPAGES val:22 [ 30.718098] ================================================================== [ 30.718969] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.719853] Read of size 8 at addr ffff88800d71c6b0 by task sshd/220 [ 30.720571] [ 30.720778] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.721757] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.722664] Call Trace: [ 30.722965] [ 30.723236] dump_stack_lvl+0x91/0xf0 [ 30.723716] print_report+0xcc/0x620 [ 30.724178] ? __virt_addr_valid+0x102/0x340 [ 30.724701] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.725286] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.725895] kasan_report+0xbe/0xf0 [ 30.726346] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.726938] vma_interval_tree_remove+0xc75/0xec0 [ 30.727504] vma_prepare+0xc54/0x11a0 [ 30.727959] __split_vma+0x5af/0x950 [ 30.728430] ? __pfx___split_vma+0x10/0x10 [ 30.728956] ? find_held_lock+0x2c/0x110 [ 30.729486] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.730050] ? lock_is_held_type+0x9f/0x120 [ 30.730594] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.731206] ? mtree_range_walk+0x632/0x900 [ 30.731765] ? mas_walk+0x5c7/0x7c0 [ 30.732239] do_vmi_munmap+0x1f1/0x2b0 [ 30.732735] mmap_region+0x1f9/0x2660 [ 30.733219] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.733739] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.734467] ? __pfx_lock_acquire+0x10/0x10 [ 30.734999] ? __pfx_mmap_region+0x10/0x10 [ 30.735528] ? security_mmap_addr+0x7d/0xa0 [ 30.736062] ? get_unmapped_area+0x1f5/0x3f0 [ 30.736613] do_mmap+0x854/0xf00 [ 30.737053] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.737572] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.738136] ksys_mmap_pgoff+0x3af/0x500 [ 30.738641] do_syscall_64+0x3f/0x90 [ 30.739131] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.739779] RIP: 0033:0x7fcdabcf8d82 [ 30.740237] 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 [ 30.742417] RSP: 002b:00007ffdb39525d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.743330] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fcdabcf8d82 [ 30.744183] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fcdab132000 [ 30.745042] RBP: 00007fcdab132000 R08: 0000000000000009 R09: 0000000000001000 [ 30.745899] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f149483ec0 [ 30.746762] R13: 00007ffdb39525f0 R14: 00007ffdb3952620 R15: 00007ffdb3952980 [ 30.747647] [ 30.747943] [ 30.748156] Allocated by task 213: [ 30.748582] kasan_save_stack+0x22/0x50 [ 30.749091] kasan_set_track+0x25/0x30 [ 30.749606] __kasan_slab_alloc+0x59/0x70 [ 30.750131] kmem_cache_alloc+0x16b/0x370 [ 30.750646] vm_area_dup+0x20/0x160 [ 30.751102] __split_vma+0x170/0x950 [ 30.751572] split_vma+0xc6/0x110 [ 30.752008] mprotect_fixup+0x8d2/0xb30 [ 30.752511] do_mprotect_pkey+0x87e/0xd40 [ 30.753032] __x64_sys_mprotect+0x78/0xc0 [ 30.753567] do_syscall_64+0x3f/0x90 [ 30.754045] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.754690] [ 30.754906] Freed by task 213: [ 30.755297] kasan_save_stack+0x22/0x50 [ 30.755799] kasan_set_track+0x25/0x30 [ 30.756288] kasan_save_free_info+0x2b/0x50 [ 30.756822] __kasan_slab_free+0x10a/0x190 [ 30.757354] kmem_cache_free+0x10d/0x4d0 [ 30.757883] rcu_core+0x8c8/0x2860 [ 30.758330] __do_softirq+0x1b7/0x7d4 [ 30.758801] [ 30.759015] Last potentially related work creation: [ 30.759594] kasan_save_stack+0x22/0x50 [ 30.760097] __kasan_record_aux_stack+0x8e/0xa0 [ 30.760674] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.761325] remove_vma+0x139/0x170 [ 30.761794] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.762361] do_vmi_munmap+0x1f1/0x2b0 [ 30.762848] __vm_munmap+0x138/0x3a0 [ 30.763399] __x64_sys_munmap+0x59/0x80 [ 30.763893] do_syscall_64+0x3f/0x90 [ 30.764380] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.765021] [ 30.765235] The buggy address belongs to the object at ffff88800d71c658 [ 30.765235] which belongs to the cache vm_area_struct of size 168 [ 30.766746] The buggy address is located 88 bytes inside of [ 30.766746] freed 168-byte region [ffff88800d71c658, ffff88800d71c700) [ 30.768167] [ 30.768379] The buggy address belongs to the physical page: [ 30.769039] page:00000000b1dc851e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd71c [ 30.770147] memcg:ffff888019a17701 [ 30.770573] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.771276] page_type: 0xffffffff() [ 30.771728] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 30.772650] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019a17701 [ 30.773582] page dumped because: kasan: bad access detected [ 30.774243] [ 30.774463] Memory state around the buggy address: [ 30.775057] ffff88800d71c580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.775922] ffff88800d71c600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.776787] >ffff88800d71c680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.777655] ^ [ 30.778239] ffff88800d71c700: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 [ 30.779103] ffff88800d71c780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 30.779962] ================================================================== [ 30.780965] Disabling lock debugging due to kernel taint [ 33.316933] BUG: Bad rss-counter state mm:000000000d37c2c3 type:MM_FILEPAGES val:33 [ 33.317934] BUG: Bad rss-counter state mm:000000000d37c2c3 type:MM_ANONPAGES val:22 [ 33.876346] BUG: Bad rss-counter state mm:00000000c3c757f1 type:MM_FILEPAGES val:33 [ 33.877542] BUG: Bad rss-counter state mm:00000000c3c757f1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:40673' (ECDSA) to the list of known hosts. 2023/06/20 11:06:48 fuzzer started 2023/06/20 11:06:48 dialing manager at localhost:36067 2023/06/20 11:06:48 checking machine... 2023/06/20 11:06:48 checking revisions... [ 34.524384] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:06:48 testing simple program... [ 34.570972] cgroup: Unknown subsys name 'net' [ 34.606928] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:06:48 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=dffffc0000000000 RCX=0000000000000000 RDX=ffff88800fe651c0 RSI=ffffffff81ef7198 RDI=ffffffff87f42370 RBP=0000000000000001 RSP=ffff88800f5677d8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=ffff888008cce888 R13=0000000000000008 R14=0000000000000020 R15=ffff88800f567888 RIP=ffffffff81ef71a3 RFL=00000216 [----AP-] 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 00007fe79d1e4900 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=00007fe79d799650 CR3=00000000161a0000 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=0000000080000001 RBX=0000000000000000 RCX=ffffffff81efd383 RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000005 RBP=0000000000000001 RSP=ffff888014797788 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=0000000000080000 R13=0000000000000019 R14=0000000000000000 R15=ffff88800f201860 RIP=ffffffff814c0250 RFL=00000246 [---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 00007f6a9c8ff900 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=00007f6a9bd0c150 CR3=0000000009070000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=8775c1752e679d6400000000000ae988 XMM05=5ef32aa393cf555e0000000000132b78 XMM06=c291bd5c70af25b90000000000131968 XMM07=fb795ef6d65770560000000000121a50 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000