syzkaller login: [ 32.600919] BUG: Bad rss-counter state mm:00000000dbf0f316 type:MM_FILEPAGES val:33 [ 32.602048] BUG: Bad rss-counter state mm:00000000dbf0f316 type:MM_ANONPAGES val:22 [ 32.771558] ================================================================== [ 32.772589] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.773639] Read of size 8 at addr ffff88800e9b3880 by task sshd/220 [ 32.774631] [ 32.774918] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.775881] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.777020] Call Trace: [ 32.777375] [ 32.777693] dump_stack_lvl+0x91/0xf0 [ 32.778260] print_report+0xcc/0x620 [ 32.778798] ? __virt_addr_valid+0x102/0x340 [ 32.779411] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.780106] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.780798] kasan_report+0xbe/0xf0 [ 32.781331] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.782024] vma_interval_tree_remove+0xc75/0xec0 [ 32.782705] vma_prepare+0xc54/0x11a0 [ 32.783237] __split_vma+0x5af/0x950 [ 32.783767] ? __pfx___split_vma+0x10/0x10 [ 32.784357] ? find_held_lock+0x2c/0x110 [ 32.784941] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.785567] ? lock_is_held_type+0x9f/0x120 [ 32.786183] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.786861] ? mtree_range_walk+0x632/0x900 [ 32.787474] ? mas_walk+0x5c7/0x7c0 [ 32.788003] do_vmi_munmap+0x1f1/0x2b0 [ 32.788556] mmap_region+0x1f9/0x2660 [ 32.789094] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.789670] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.790473] ? __pfx_lock_acquire+0x10/0x10 [ 32.791068] ? __pfx_mmap_region+0x10/0x10 [ 32.791662] ? security_mmap_addr+0x7d/0xa0 [ 32.792257] ? get_unmapped_area+0x1f5/0x3f0 [ 32.792871] do_mmap+0x854/0xf00 [ 32.793358] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.793912] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.794560] ksys_mmap_pgoff+0x3af/0x500 [ 32.795127] do_syscall_64+0x3f/0x90 [ 32.795662] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.796384] RIP: 0033:0x7fd8021f3d82 [ 32.796898] 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 [ 32.799291] RSP: 002b:00007ffd1406f398 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.800301] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd8021f3d82 [ 32.801254] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd80162d000 [ 32.802213] RBP: 00007fd80162d000 R08: 0000000000000009 R09: 0000000000001000 [ 32.803162] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558773b14f70 [ 32.804114] R13: 00007ffd1406f3b0 R14: 00007ffd1406f3e0 R15: 00007ffd1406f740 [ 32.805071] [ 32.805398] [ 32.805642] Allocated by task 213: [ 32.806139] kasan_save_stack+0x22/0x50 [ 32.806701] kasan_set_track+0x25/0x30 [ 32.807253] __kasan_slab_alloc+0x59/0x70 [ 32.807833] kmem_cache_alloc+0x16b/0x370 [ 32.808407] vm_area_dup+0x20/0x160 [ 32.808910] __split_vma+0x170/0x950 [ 32.809430] split_vma+0xc6/0x110 [ 32.809924] mprotect_fixup+0x8d2/0xb30 [ 32.810488] do_mprotect_pkey+0x87e/0xd40 [ 32.811071] __x64_sys_mprotect+0x78/0xc0 [ 32.811652] do_syscall_64+0x3f/0x90 [ 32.812184] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.812899] [ 32.813138] Freed by task 213: [ 32.813581] kasan_save_stack+0x22/0x50 [ 32.814150] kasan_set_track+0x25/0x30 [ 32.814691] kasan_save_free_info+0x2b/0x50 [ 32.815265] __kasan_slab_free+0x10a/0x190 [ 32.815919] kmem_cache_free+0x10d/0x4d0 [ 32.816473] rcu_core+0x8c8/0x2860 [ 32.816954] __do_softirq+0x1b7/0x7d4 [ 32.817465] [ 32.817696] Last potentially related work creation: [ 32.818336] kasan_save_stack+0x22/0x50 [ 32.818880] __kasan_record_aux_stack+0x8e/0xa0 [ 32.819509] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.820201] remove_vma+0x139/0x170 [ 32.820687] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.821295] do_vmi_munmap+0x1f1/0x2b0 [ 32.821822] __vm_munmap+0x138/0x3a0 [ 32.822334] __x64_sys_munmap+0x59/0x80 [ 32.822876] do_syscall_64+0x3f/0x90 [ 32.823388] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.824075] [ 32.824307] The buggy address belongs to the object at ffff88800e9b3828 [ 32.824307] which belongs to the cache vm_area_struct of size 168 [ 32.825898] The buggy address is located 88 bytes inside of [ 32.825898] freed 168-byte region [ffff88800e9b3828, ffff88800e9b38d0) [ 32.827418] [ 32.827649] The buggy address belongs to the physical page: [ 32.828353] page:000000009db68eb4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe9b3 [ 32.829513] memcg:ffff88800def1201 [ 32.829968] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.830665] page_type: 0xffffffff() [ 32.831155] raw: 0100000000000200 ffff88800879fc80 ffffea000038e080 dead000000000008 [ 32.832142] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800def1201 [ 32.833109] page dumped because: kasan: bad access detected [ 32.833813] [ 32.834043] Memory state around the buggy address: [ 32.834673] ffff88800e9b3780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 32.835589] ffff88800e9b3800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 32.836509] >ffff88800e9b3880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 32.837423] ^ [ 32.837873] ffff88800e9b3900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.838799] ffff88800e9b3980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 32.839706] ================================================================== [ 32.840749] Disabling lock debugging due to kernel taint [ 35.035507] BUG: Bad rss-counter state mm:000000002bbf5888 type:MM_FILEPAGES val:33 [ 35.036755] BUG: Bad rss-counter state mm:000000002bbf5888 type:MM_ANONPAGES val:22 [ 35.516500] BUG: Bad rss-counter state mm:00000000073064bb type:MM_FILEPAGES val:33 [ 35.517723] BUG: Bad rss-counter state mm:00000000073064bb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:50622' (ECDSA) to the list of known hosts. 2023/06/19 18:25:20 fuzzer started 2023/06/19 18:25:20 dialing manager at localhost:44161 2023/06/19 18:25:20 checking machine... 2023/06/19 18:25:20 checking revisions... [ 36.256590] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:25:20 testing simple program... [ 36.295735] cgroup: Unknown subsys name 'net' [ 36.346920] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:25:18 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce09a98 RCX=0000000000000002 RDX=1ffff1100d9c1354 RSI=ffff88806ce09b38 RDI=ffff88806ce09aa0 RBP=ffff88806ce09b38 RSP=ffff88806ce099a0 R8 =ffffffff86088c1e R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000003c0d R12=0000000000000008 R13=ffff88806ce09ae0 R14=ffff88806ce09b40 R15=ffff88806ce09a98 RIP=ffffffff81130445 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 00007f90d3350900 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=00007f90d3905650 CR3=000000001b6cc000 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=0000000000000000 RBX=0000000000000001 RCX=0000000000000000 RDX=ffff888010351b40 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=ffffffff822443e6 RSP=ffff88801031fd78 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000200 R11=00000000000b6996 R12=ffffffff854145c0 R13=ffffffffffffffff R14=0000000000000000 R15=ffff88800f298400 RIP=ffffffff81534371 RFL=00000056 [---ZAP-] 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 00007fa2701ec900 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=00007fa26f602fd0 CR3=000000000c67a000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=5aa983f8a8b8036100000000000ae988 XMM05=91c5992a200a468000000000001350f8 XMM06=19e9129bd510f2350000000000133f90 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000