syzkaller login: [ 28.280509] BUG: Bad rss-counter state mm:0000000044743ea3 type:MM_FILEPAGES val:33 [ 28.281311] BUG: Bad rss-counter state mm:0000000044743ea3 type:MM_ANONPAGES val:22 [ 28.422489] ================================================================== [ 28.423157] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.423820] Read of size 8 at addr ffff88800eb6d3f8 by task sshd/220 [ 28.424366] [ 28.424523] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.425133] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.425825] Call Trace: [ 28.426048] [ 28.426259] dump_stack_lvl+0x91/0xf0 [ 28.426643] print_report+0xcc/0x620 [ 28.426990] ? __virt_addr_valid+0x102/0x340 [ 28.427386] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.427819] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.428258] kasan_report+0xbe/0xf0 [ 28.428652] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.429095] vma_interval_tree_remove+0xc75/0xec0 [ 28.429527] vma_prepare+0xc54/0x11a0 [ 28.429873] __split_vma+0x5af/0x950 [ 28.430211] ? __pfx___split_vma+0x10/0x10 [ 28.430604] ? find_held_lock+0x2c/0x110 [ 28.430973] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.431376] ? lock_is_held_type+0x9f/0x120 [ 28.431765] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.432219] ? mtree_range_walk+0x632/0x900 [ 28.432647] ? mas_walk+0x5c7/0x7c0 [ 28.433001] do_vmi_munmap+0x1f1/0x2b0 [ 28.433369] mmap_region+0x1f9/0x2660 [ 28.433726] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.434100] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.434649] ? __pfx_lock_acquire+0x10/0x10 [ 28.435054] ? __pfx_mmap_region+0x10/0x10 [ 28.435445] ? security_mmap_addr+0x7d/0xa0 [ 28.435838] ? get_unmapped_area+0x1f5/0x3f0 [ 28.436246] do_mmap+0x854/0xf00 [ 28.436569] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.436958] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.437389] ksys_mmap_pgoff+0x3af/0x500 [ 28.437769] do_syscall_64+0x3f/0x90 [ 28.438117] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.438631] RIP: 0033:0x7f93bc33ed82 [ 28.438972] 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 [ 28.440517] RSP: 002b:00007ffd88fdea28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.441144] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f93bc33ed82 [ 28.441744] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f93bb778000 [ 28.442364] RBP: 00007f93bb778000 R08: 0000000000000009 R09: 0000000000001000 [ 28.442953] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560d7c1a9ec0 [ 28.443557] R13: 00007ffd88fdea40 R14: 00007ffd88fdea70 R15: 00007ffd88fdedd0 [ 28.444162] [ 28.444373] [ 28.444522] Allocated by task 212: [ 28.444824] kasan_save_stack+0x22/0x50 [ 28.445182] kasan_set_track+0x25/0x30 [ 28.445532] __kasan_slab_alloc+0x59/0x70 [ 28.445901] kmem_cache_alloc+0x16b/0x370 [ 28.446279] vm_area_dup+0x20/0x160 [ 28.446592] __split_vma+0x170/0x950 [ 28.446936] split_vma+0xc6/0x110 [ 28.447255] mprotect_fixup+0x8d2/0xb30 [ 28.447596] do_mprotect_pkey+0x87e/0xd40 [ 28.447975] __x64_sys_mprotect+0x78/0xc0 [ 28.448346] do_syscall_64+0x3f/0x90 [ 28.448682] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.449157] [ 28.449319] Freed by task 203: [ 28.449608] kasan_save_stack+0x22/0x50 [ 28.449980] kasan_set_track+0x25/0x30 [ 28.450375] kasan_save_free_info+0x2b/0x50 [ 28.450770] __kasan_slab_free+0x10a/0x190 [ 28.451171] kmem_cache_free+0x10d/0x4d0 [ 28.451554] rcu_core+0x8c8/0x2860 [ 28.451893] __do_softirq+0x1b7/0x7d4 [ 28.452254] [ 28.452412] Last potentially related work creation: [ 28.452850] kasan_save_stack+0x22/0x50 [ 28.453224] __kasan_record_aux_stack+0x8e/0xa0 [ 28.453649] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.454135] remove_vma+0x139/0x170 [ 28.454476] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.454895] do_vmi_munmap+0x1f1/0x2b0 [ 28.455260] __vm_munmap+0x138/0x3a0 [ 28.455601] __x64_sys_munmap+0x59/0x80 [ 28.455972] do_syscall_64+0x3f/0x90 [ 28.456336] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.456812] [ 28.456975] Second to last potentially related work creation: [ 28.457455] kasan_save_stack+0x22/0x50 [ 28.457817] __kasan_record_aux_stack+0x8e/0xa0 [ 28.458237] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.458725] remove_vma+0x139/0x170 [ 28.459052] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.459460] do_vmi_munmap+0x1f1/0x2b0 [ 28.459816] mmap_region+0x1f9/0x2660 [ 28.460151] do_mmap+0x854/0xf00 [ 28.460466] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.460814] ksys_mmap_pgoff+0x7d/0x500 [ 28.461168] do_syscall_64+0x3f/0x90 [ 28.461512] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.461970] [ 28.462126] The buggy address belongs to the object at ffff88800eb6d3a0 [ 28.462126] which belongs to the cache vm_area_struct of size 168 [ 28.463182] The buggy address is located 88 bytes inside of [ 28.463182] freed 168-byte region [ffff88800eb6d3a0, ffff88800eb6d448) [ 28.464180] [ 28.464344] The buggy address belongs to the physical page: [ 28.464808] page:00000000f81f9a1c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeb6d [ 28.465585] memcg:ffff888019f59601 [ 28.465892] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 28.466410] page_type: 0xffffffff() [ 28.466738] raw: 0100000000000200 ffff8880087a0c80 ffffea000040cb00 dead000000000007 [ 28.467412] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019f59601 [ 28.468100] page dumped because: kasan: bad access detected [ 28.468569] [ 28.468718] Memory state around the buggy address: [ 28.469143] ffff88800eb6d280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 28.469742] ffff88800eb6d300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 28.470397] >ffff88800eb6d380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 28.471009] ^ [ 28.471613] ffff88800eb6d400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 28.472216] ffff88800eb6d480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 28.472832] ================================================================== [ 28.473940] Disabling lock debugging due to kernel taint [ 29.882354] BUG: Bad rss-counter state mm:000000001c565943 type:MM_FILEPAGES val:33 [ 29.883039] BUG: Bad rss-counter state mm:000000001c565943 type:MM_ANONPAGES val:22 [ 30.276271] BUG: Bad rss-counter state mm:000000007a9a5fd0 type:MM_FILEPAGES val:33 [ 30.277112] BUG: Bad rss-counter state mm:000000007a9a5fd0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:29869' (ECDSA) to the list of known hosts. 2023/06/21 10:13:23 fuzzer started 2023/06/21 10:13:23 dialing manager at localhost:36067 2023/06/21 10:13:23 checking machine... 2023/06/21 10:13:23 checking revisions... [ 30.889229] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:13:23 testing simple program... [ 30.929544] cgroup: Unknown subsys name 'net' [ 30.963707] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:13:23 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff8363d304 RDX=00000000000263d3 RSI=00000000000263d3 RDI=ffffffff8658293c RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =0000000000000000 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=000000000009a984 R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88806ce09ad9 R15=ffff88806ce09a98 RIP=ffffffff8113077a RFL=00000217 [----APC] 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 00007fe8cb5ac900 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=00007fe8cbb61650 CR3=000000000da90000 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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 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=00007f705e082e90 CR3=000000000c73c000 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=0a8679b6a4e345a4e449048bba66ac7f XMM02=000000000011adb0eff9b2d0a8fce9cb XMM03=000000000011ae802c67c8bc2e329bc3 XMM04=08834a629c6e238d00000000000ae988 XMM05=19e9129bd510f2350000000000132c60 XMM06=584acc4840baf4fd0000000000131ac8 XMM07=e042d86d42eb936e0000000000121d08 XMM08=6d73397104143ad3000000000011ae80 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000