syzkaller login: [ 55.640638] BUG: Bad rss-counter state mm:00000000704273f7 type:MM_FILEPAGES val:33 [ 55.641610] BUG: Bad rss-counter state mm:00000000704273f7 type:MM_ANONPAGES val:22 [ 55.754607] ================================================================== [ 55.755318] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 55.755970] Read of size 8 at addr ffff88801a14b4e0 by task sshd/219 [ 55.756457] [ 55.756592] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 55.757296] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 55.758030] Call Trace: [ 55.758232] [ 55.758427] dump_stack_lvl+0x91/0xf0 [ 55.758965] print_report+0xcc/0x620 [ 55.759342] ? __virt_addr_valid+0x102/0x340 [ 55.759735] ? vma_interval_tree_remove+0xc75/0xec0 [ 55.760180] ? vma_interval_tree_remove+0xc75/0xec0 [ 55.760590] kasan_report+0xbe/0xf0 [ 55.760971] ? vma_interval_tree_remove+0xc75/0xec0 [ 55.761426] vma_interval_tree_remove+0xc75/0xec0 [ 55.761881] vma_prepare+0xc54/0x11a0 [ 55.762240] __split_vma+0x5af/0x950 [ 55.762567] ? __pfx___split_vma+0x10/0x10 [ 55.762958] ? find_held_lock+0x2c/0x110 [ 55.763316] do_vmi_align_munmap+0x2ba/0x11f0 [ 55.763707] ? lock_is_held_type+0x9f/0x120 [ 55.764092] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 55.764522] ? mtree_range_walk+0x632/0x900 [ 55.764946] ? mas_walk+0x5c7/0x7c0 [ 55.765257] do_vmi_munmap+0x1f1/0x2b0 [ 55.765587] mmap_region+0x1f9/0x2660 [ 55.765924] ? vm_mmap_pgoff+0x15c/0x3a0 [ 55.766281] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 55.766793] ? __pfx_lock_acquire+0x10/0x10 [ 55.767176] ? __pfx_mmap_region+0x10/0x10 [ 55.767539] ? security_mmap_addr+0x7d/0xa0 [ 55.767891] ? get_unmapped_area+0x1f5/0x3f0 [ 55.768282] do_mmap+0x854/0xf00 [ 55.768592] vm_mmap_pgoff+0x1a6/0x3a0 [ 55.768971] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 55.769358] ksys_mmap_pgoff+0x3af/0x500 [ 55.769701] do_syscall_64+0x3f/0x90 [ 55.770041] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 55.770479] RIP: 0033:0x7f75a11b0d82 [ 55.770801] 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 [ 55.772341] RSP: 002b:00007ffda4634ec8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 55.773069] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f75a11b0d82 [ 55.773665] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f75a05ea000 [ 55.774258] RBP: 00007f75a05ea000 R08: 0000000000000009 R09: 0000000000001000 [ 55.774856] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ec5d034ec0 [ 55.775413] R13: 00007ffda4634ee0 R14: 00007ffda4634f10 R15: 00007ffda4635270 [ 55.776015] [ 55.776220] [ 55.776367] Allocated by task 212: [ 55.776649] kasan_save_stack+0x22/0x50 [ 55.777057] kasan_set_track+0x25/0x30 [ 55.777393] __kasan_slab_alloc+0x59/0x70 [ 55.777746] kmem_cache_alloc+0x16b/0x370 [ 55.778088] vm_area_dup+0x20/0x160 [ 55.778410] __split_vma+0x170/0x950 [ 55.778732] split_vma+0xc6/0x110 [ 55.779036] mprotect_fixup+0x8d2/0xb30 [ 55.779385] do_mprotect_pkey+0x87e/0xd40 [ 55.779755] __x64_sys_mprotect+0x78/0xc0 [ 55.780095] do_syscall_64+0x3f/0x90 [ 55.780430] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 55.781097] [ 55.781245] Freed by task 202: [ 55.781519] kasan_save_stack+0x22/0x50 [ 55.781900] kasan_set_track+0x25/0x30 [ 55.782280] kasan_save_free_info+0x2b/0x50 [ 55.782665] __kasan_slab_free+0x10a/0x190 [ 55.783082] kmem_cache_free+0x10d/0x4d0 [ 55.783436] rcu_core+0x8c8/0x2860 [ 55.783747] __do_softirq+0x1b7/0x7d4 [ 55.784125] [ 55.784265] Last potentially related work creation: [ 55.784651] kasan_save_stack+0x22/0x50 [ 55.785054] __kasan_record_aux_stack+0x8e/0xa0 [ 55.785453] __call_rcu_common.constprop.0+0x6a/0xb90 [ 55.785928] remove_vma+0x139/0x170 [ 55.786265] do_vmi_align_munmap+0xd4a/0x11f0 [ 55.786643] do_vmi_munmap+0x1f1/0x2b0 [ 55.787018] __vm_munmap+0x138/0x3a0 [ 55.787358] __x64_sys_munmap+0x59/0x80 [ 55.787700] do_syscall_64+0x3f/0x90 [ 55.788052] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 55.788488] [ 55.788638] The buggy address belongs to the object at ffff88801a14b488 [ 55.788638] which belongs to the cache vm_area_struct of size 168 [ 55.789730] The buggy address is located 88 bytes inside of [ 55.789730] freed 168-byte region [ffff88801a14b488, ffff88801a14b530) [ 55.790756] [ 55.790932] The buggy address belongs to the physical page: [ 55.791371] page:000000004def348c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a14b [ 55.792139] memcg:ffff88800e1b9201 [ 55.792425] flags: 0x100000000000200(slab|node=0|zone=1) [ 55.792946] page_type: 0xffffffff() [ 55.793258] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 55.793890] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e1b9201 [ 55.794532] page dumped because: kasan: bad access detected [ 55.794989] [ 55.795128] Memory state around the buggy address: [ 55.795528] ffff88801a14b380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 55.796130] ffff88801a14b400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 55.796713] >ffff88801a14b480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 55.797339] ^ [ 55.797868] ffff88801a14b500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 55.798463] ffff88801a14b580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 55.799069] ================================================================== [ 55.799780] Disabling lock debugging due to kernel taint [ 57.865509] BUG: Bad rss-counter state mm:000000007088cbcc type:MM_FILEPAGES val:33 [ 57.866258] BUG: Bad rss-counter state mm:000000007088cbcc type:MM_ANONPAGES val:22 [ 58.322738] BUG: Bad rss-counter state mm:00000000d4025ec8 type:MM_FILEPAGES val:33 [ 58.323441] BUG: Bad rss-counter state mm:00000000d4025ec8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:50810' (ECDSA) to the list of known hosts. 2023/06/20 08:37:41 fuzzer started 2023/06/20 08:37:41 dialing manager at localhost:44161 2023/06/20 08:37:41 checking machine... 2023/06/20 08:37:41 checking revisions... [ 58.857011] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:37:41 testing simple program... [ 58.890014] cgroup: Unknown subsys name 'net' [ 58.931315] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:37:15 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=0000000000000001 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=00007ffda7218fd8 CR3=0000000014180000 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=2030343a37333a3830203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030343a37333a3830203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000000 RCX=ffffffff81378270 RDX=1ffff110019ec1ba RSI=0000000000000000 RDI=ffff88800cf60dd0 RBP=0000000000000001 RSP=ffff88806cf09e18 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=1ffff1100d9e7479 R12=dffffc0000000000 R13=ffff88800cf60d90 R14=ffff88800cf60d10 R15=dffffc0000000000 RIP=ffffffff81845cc6 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 00007fdb5f280900 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=00007fff061b1000 CR3=000000001c940000 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=563412feff00545000000000000080fe XMM01=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000