syzkaller login: [ 32.215843] BUG: Bad rss-counter state mm:00000000e531378f type:MM_FILEPAGES val:33 [ 32.217039] BUG: Bad rss-counter state mm:00000000e531378f type:MM_ANONPAGES val:22 [ 32.398518] ================================================================== [ 32.399639] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.400833] Read of size 8 at addr ffff88800e30f3f8 by task sshd/225 [ 32.401692] [ 32.401934] CPU: 1 PID: 225 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.402918] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.403997] Call Trace: [ 32.404355] [ 32.404677] dump_stack_lvl+0x91/0xf0 [ 32.405217] print_report+0xcc/0x620 [ 32.405755] ? __virt_addr_valid+0x102/0x340 [ 32.406373] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.407068] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.407756] kasan_report+0xbe/0xf0 [ 32.408283] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.409002] vma_interval_tree_remove+0xc75/0xec0 [ 32.409698] vma_prepare+0xc54/0x11a0 [ 32.410281] __split_vma+0x5af/0x950 [ 32.410829] ? __pfx___split_vma+0x10/0x10 [ 32.411451] ? find_held_lock+0x2c/0x110 [ 32.412065] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.412723] ? lock_is_held_type+0x9f/0x120 [ 32.413345] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.414063] ? mtree_range_walk+0x632/0x900 [ 32.414706] ? mas_walk+0x5c7/0x7c0 [ 32.415253] do_vmi_munmap+0x1f1/0x2b0 [ 32.415829] mmap_region+0x1f9/0x2660 [ 32.416395] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.416989] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.417811] ? __pfx_lock_acquire+0x10/0x10 [ 32.418443] ? __pfx_mmap_region+0x10/0x10 [ 32.419055] ? security_mmap_addr+0x7d/0xa0 [ 32.419663] ? get_unmapped_area+0x1f5/0x3f0 [ 32.420299] do_mmap+0x854/0xf00 [ 32.420800] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.421362] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.422007] ksys_mmap_pgoff+0x3af/0x500 [ 32.422600] do_syscall_64+0x3f/0x90 [ 32.423144] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.423891] RIP: 0033:0x7f488e361d82 [ 32.424419] 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 [ 32.426857] RSP: 002b:00007ffc93d6a4f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.427898] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f488e361d82 [ 32.428865] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f488d79b000 [ 32.429906] RBP: 00007f488d79b000 R08: 0000000000000009 R09: 0000000000001000 [ 32.430934] R10: 0000000000000812 R11: 0000000000000206 R12: 00005562aafacec0 [ 32.431906] R13: 00007ffc93d6a510 R14: 00007ffc93d6a540 R15: 00007ffc93d6a8a0 [ 32.432886] [ 32.433216] [ 32.433456] Allocated by task 218: [ 32.433949] kasan_save_stack+0x22/0x50 [ 32.434538] kasan_set_track+0x25/0x30 [ 32.435108] __kasan_slab_alloc+0x59/0x70 [ 32.435702] kmem_cache_alloc+0x16b/0x370 [ 32.436291] vm_area_dup+0x20/0x160 [ 32.436809] __split_vma+0x170/0x950 [ 32.437352] split_vma+0xc6/0x110 [ 32.437868] mprotect_fixup+0x8d2/0xb30 [ 32.438483] do_mprotect_pkey+0x87e/0xd40 [ 32.439079] __x64_sys_mprotect+0x78/0xc0 [ 32.439669] do_syscall_64+0x3f/0x90 [ 32.440209] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.440936] [ 32.441247] Freed by task 218: [ 32.441690] kasan_save_stack+0x22/0x50 [ 32.442275] kasan_set_track+0x25/0x30 [ 32.442833] kasan_save_free_info+0x2b/0x50 [ 32.443432] __kasan_slab_free+0x10a/0x190 [ 32.444039] kmem_cache_free+0x10d/0x4d0 [ 32.444613] rcu_core+0x8c8/0x2860 [ 32.445114] __do_softirq+0x1b7/0x7d4 [ 32.445651] [ 32.445891] Last potentially related work creation: [ 32.446553] kasan_save_stack+0x22/0x50 [ 32.447117] __kasan_record_aux_stack+0x8e/0xa0 [ 32.447759] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.448478] remove_vma+0x139/0x170 [ 32.448995] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.449624] do_vmi_munmap+0x1f1/0x2b0 [ 32.450190] __vm_munmap+0x138/0x3a0 [ 32.450716] __x64_sys_munmap+0x59/0x80 [ 32.451270] do_syscall_64+0x3f/0x90 [ 32.451803] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.452518] [ 32.452761] The buggy address belongs to the object at ffff88800e30f3a0 [ 32.452761] which belongs to the cache vm_area_struct of size 168 [ 32.454427] The buggy address is located 88 bytes inside of [ 32.454427] freed 168-byte region [ffff88800e30f3a0, ffff88800e30f448) [ 32.456011] [ 32.456252] The buggy address belongs to the physical page: [ 32.456992] page:00000000af7b2a81 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe30f [ 32.458211] memcg:ffff88800dc53301 [ 32.458682] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.459392] page_type: 0xffffffff() [ 32.459903] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.460919] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dc53301 [ 32.461931] page dumped because: kasan: bad access detected [ 32.462678] [ 32.462919] Memory state around the buggy address: [ 32.463593] ffff88800e30f280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 32.464549] ffff88800e30f300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 32.465502] >ffff88800e30f380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 32.466457] ^ [ 32.467402] ffff88800e30f400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 32.468362] ffff88800e30f480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.469317] ================================================================== [ 32.470389] Disabling lock debugging due to kernel taint [ 34.949415] BUG: Bad rss-counter state mm:000000006b7b821e type:MM_FILEPAGES val:33 [ 34.950422] BUG: Bad rss-counter state mm:000000006b7b821e type:MM_ANONPAGES val:22 [ 35.441723] BUG: Bad rss-counter state mm:00000000d51ad77e type:MM_FILEPAGES val:33 [ 35.443266] BUG: Bad rss-counter state mm:00000000d51ad77e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:53995' (ECDSA) to the list of known hosts. 2023/06/19 18:01:36 fuzzer started 2023/06/19 18:01:36 dialing manager at localhost:44161 2023/06/19 18:01:36 checking machine... 2023/06/19 18:01:36 checking revisions... [ 36.173731] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:01:36 testing simple program... [ 36.221005] cgroup: Unknown subsys name 'net' [ 36.261491] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:01:35 Registers: info registers vcpu 0 RAX=0000000000000007 RBX=ffff88806ce39500 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000008 RDI=ffff88806ce395dc RBP=0000000000000001 RSP=ffff88801cd0f628 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000001 R12=0000000000000000 R13=ffff888008c58000 R14=0000000000000000 R15=dffffc0000000000 RIP=ffffffff812644d1 RFL=00000002 [-------] 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 00007facdab33900 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=0000559eba41d768 CR3=0000000015eb8000 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=ff0000000000ffff0000000000ff0000 XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffffffff813ad420 RCX=ffffffff812d869a RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=ffff88801cd0fae8 RSP=ffff88801cd0fa80 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffff88801cd0fb58 R13=0000000000000000 R14=ffff888014713680 R15=ffff88800d7b4be0 RIP=ffffffff8113036f 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 00007facdab33900 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=00007facdb0e8650 CR3=0000000015eb8000 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=ffffffff00ffffffffffffffffffffff XMM01=707465675f6c697475646f6d6d61705f XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000