syzkaller login: [ 31.681497] BUG: Bad rss-counter state mm:00000000436a47a0 type:MM_FILEPAGES val:33 [ 31.682728] BUG: Bad rss-counter state mm:00000000436a47a0 type:MM_ANONPAGES val:22 [ 31.718063] ================================================================== [ 31.719094] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.720248] Read of size 8 at addr ffff888019247310 by task sshd/221 [ 31.721161] [ 31.721423] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.722413] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.723544] Call Trace: [ 31.723946] [ 31.724266] dump_stack_lvl+0x91/0xf0 [ 31.724853] print_report+0xcc/0x620 [ 31.725420] ? __virt_addr_valid+0x102/0x340 [ 31.726038] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.726690] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.727415] kasan_report+0xbe/0xf0 [ 31.727910] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.728551] vma_interval_tree_remove+0xc75/0xec0 [ 31.729165] vma_prepare+0xc54/0x11a0 [ 31.729649] __split_vma+0x5af/0x950 [ 31.730138] ? __pfx___split_vma+0x10/0x10 [ 31.730677] ? mark_held_locks+0x9e/0xe0 [ 31.731201] ? asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 31.731891] ? asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 31.732568] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.733143] ? lock_is_held_type+0x9f/0x120 [ 31.733693] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.734311] ? mtree_range_walk+0x632/0x900 [ 31.734876] ? mas_walk+0x5c7/0x7c0 [ 31.735356] do_vmi_munmap+0x1f1/0x2b0 [ 31.735884] mmap_region+0x1f9/0x2660 [ 31.736377] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.736899] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.737625] ? __pfx_lock_acquire+0x10/0x10 [ 31.738170] ? __pfx_mmap_region+0x10/0x10 [ 31.738710] ? security_mmap_addr+0x7d/0xa0 [ 31.739252] ? get_unmapped_area+0x1f5/0x3f0 [ 31.739818] do_mmap+0x854/0xf00 [ 31.740276] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.740780] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.741362] ksys_mmap_pgoff+0x3af/0x500 [ 31.741881] do_syscall_64+0x3f/0x90 [ 31.742379] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.743048] RIP: 0033:0x7f8ed9781d82 [ 31.743516] 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 [ 31.745702] RSP: 002b:00007ffda21891c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.746807] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8ed9781d82 [ 31.747674] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8ed8bbb000 [ 31.748568] RBP: 00007f8ed8bbb000 R08: 0000000000000009 R09: 0000000000001000 [ 31.749479] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a9c7aafec0 [ 31.750347] R13: 00007ffda21891e0 R14: 00007ffda2189210 R15: 00007ffda2189570 [ 31.751214] [ 31.751510] [ 31.751728] Allocated by task 214: [ 31.752187] kasan_save_stack+0x22/0x50 [ 31.752700] kasan_set_track+0x25/0x30 [ 31.753211] __kasan_slab_alloc+0x59/0x70 [ 31.753740] kmem_cache_alloc+0x16b/0x370 [ 31.754267] vm_area_dup+0x20/0x160 [ 31.754737] __split_vma+0x170/0x950 [ 31.755221] split_vma+0xc6/0x110 [ 31.755667] mprotect_fixup+0x8d2/0xb30 [ 31.756214] do_mprotect_pkey+0x87e/0xd40 [ 31.756744] __x64_sys_mprotect+0x78/0xc0 [ 31.757277] do_syscall_64+0x3f/0x90 [ 31.757758] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.758415] [ 31.758635] Freed by task 214: [ 31.759031] kasan_save_stack+0x22/0x50 [ 31.759542] kasan_set_track+0x25/0x30 [ 31.760135] kasan_save_free_info+0x2b/0x50 [ 31.760684] __kasan_slab_free+0x10a/0x190 [ 31.761223] kmem_cache_free+0x10d/0x4d0 [ 31.761742] rcu_core+0x8c8/0x2860 [ 31.762192] __do_softirq+0x1b7/0x7d4 [ 31.762680] [ 31.762896] Last potentially related work creation: [ 31.763497] kasan_save_stack+0x22/0x50 [ 31.764027] __kasan_record_aux_stack+0x8e/0xa0 [ 31.764610] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.765277] remove_vma+0x139/0x170 [ 31.765741] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.766306] do_vmi_munmap+0x1f1/0x2b0 [ 31.766799] __vm_munmap+0x138/0x3a0 [ 31.767284] __x64_sys_munmap+0x59/0x80 [ 31.767801] do_syscall_64+0x3f/0x90 [ 31.768291] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.768954] [ 31.769171] The buggy address belongs to the object at ffff8880192472b8 [ 31.769171] which belongs to the cache vm_area_struct of size 168 [ 31.770674] The buggy address is located 88 bytes inside of [ 31.770674] freed 168-byte region [ffff8880192472b8, ffff888019247360) [ 31.772124] [ 31.772344] The buggy address belongs to the physical page: [ 31.773011] page:000000003986fb7a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19247 [ 31.774130] memcg:ffff888016f79d01 [ 31.774561] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.775219] page_type: 0xffffffff() [ 31.775676] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.776630] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016f79d01 [ 31.777577] page dumped because: kasan: bad access detected [ 31.778254] [ 31.778474] Memory state around the buggy address: [ 31.779068] ffff888019247200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 31.779957] ffff888019247280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.780833] >ffff888019247300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.781704] ^ [ 31.782196] ffff888019247380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.783072] ffff888019247400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.783952] ================================================================== [ 31.784987] Disabling lock debugging due to kernel taint [ 33.763019] BUG: Bad rss-counter state mm:000000001d1ee4f6 type:MM_FILEPAGES val:33 [ 33.765174] BUG: Bad rss-counter state mm:000000001d1ee4f6 type:MM_ANONPAGES val:22 [ 34.345493] BUG: Bad rss-counter state mm:00000000dc5449a6 type:MM_FILEPAGES val:33 [ 34.346674] BUG: Bad rss-counter state mm:00000000dc5449a6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:54706' (ECDSA) to the list of known hosts. 2023/06/21 03:14:14 fuzzer started 2023/06/21 03:14:14 dialing manager at localhost:36067 2023/06/21 03:14:14 checking machine... 2023/06/21 03:14:14 checking revisions... [ 34.983827] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:14:14 testing simple program... [ 35.016506] cgroup: Unknown subsys name 'net' [ 35.065478] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:14:14 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce09a98 RCX=0000000000000001 RDX=1ffff1100d9c1355 RSI=ffff888015807cd8 RDI=ffff88806ce09aa8 RBP=ffff888015807cd8 RSP=ffff88806ce099f0 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000020fef R12=0000000000000008 R13=ffff888015800000 R14=ffff888015807cd8 R15=ffff88806ce09a98 RIP=ffffffff81130468 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 00007fd4764a4900 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=00007fd4758d8c10 CR3=000000000ca18000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=b7067f8468b770cf00000000000ae988 XMM05=7dce68aaa890a47b0000000000132958 XMM06=59d5b690e0af863b0000000000131aa0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=ffffffff852c9590 RCX=0000000000000000 RDX=ffff888019b89b40 RSI=ffffffff81eefbba RDI=0000000000000005 RBP=dffffc0000000000 RSP=ffff8880192c7908 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=0000000000000040 R13=ffff888015b12c88 R14=0000000000000001 R15=ffff888016099d60 RIP=ffffffff814c0880 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 00007f63624b4900 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=00007f6362a69650 CR3=000000000fc72000 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=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