syzkaller login: [ 30.647819] BUG: Bad rss-counter state mm:00000000aa0f593c type:MM_FILEPAGES val:33 [ 30.648843] BUG: Bad rss-counter state mm:00000000aa0f593c type:MM_ANONPAGES val:22 [ 30.811327] ================================================================== [ 30.812445] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.813579] Read of size 8 at addr ffff88800f7afa50 by task sshd/221 [ 30.814550] [ 30.814776] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.815628] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.816615] Call Trace: [ 30.816937] [ 30.817219] dump_stack_lvl+0x91/0xf0 [ 30.817716] print_report+0xcc/0x620 [ 30.818195] ? __virt_addr_valid+0x102/0x340 [ 30.818738] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.819366] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.819988] kasan_report+0xbe/0xf0 [ 30.820464] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.821087] vma_interval_tree_remove+0xc75/0xec0 [ 30.821700] vma_prepare+0xc54/0x11a0 [ 30.822182] __split_vma+0x5af/0x950 [ 30.822652] ? __pfx___split_vma+0x10/0x10 [ 30.823206] ? find_held_lock+0x2c/0x110 [ 30.823732] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.824293] ? lock_is_held_type+0x9f/0x120 [ 30.824830] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.825437] ? mtree_range_walk+0x632/0x900 [ 30.825992] ? mas_walk+0x5c7/0x7c0 [ 30.826470] do_vmi_munmap+0x1f1/0x2b0 [ 30.826975] mmap_region+0x1f9/0x2660 [ 30.827449] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.827964] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.828677] ? __pfx_lock_acquire+0x10/0x10 [ 30.829210] ? __pfx_mmap_region+0x10/0x10 [ 30.829731] ? security_mmap_addr+0x7d/0xa0 [ 30.830262] ? get_unmapped_area+0x1f5/0x3f0 [ 30.830824] do_mmap+0x854/0xf00 [ 30.831256] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.831752] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.832313] ksys_mmap_pgoff+0x3af/0x500 [ 30.832817] do_syscall_64+0x3f/0x90 [ 30.833303] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.833940] RIP: 0033:0x7f6890732d82 [ 30.834399] 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 [ 30.836520] RSP: 002b:00007ffc1ba27008 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.837427] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6890732d82 [ 30.838277] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f688fb6c000 [ 30.839142] RBP: 00007f688fb6c000 R08: 0000000000000009 R09: 0000000000001000 [ 30.839985] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561cd91def70 [ 30.840833] R13: 00007ffc1ba27020 R14: 00007ffc1ba27050 R15: 00007ffc1ba273b0 [ 30.841687] [ 30.841982] [ 30.842198] Allocated by task 213: [ 30.842627] kasan_save_stack+0x22/0x50 [ 30.843155] kasan_set_track+0x25/0x30 [ 30.843654] __kasan_slab_alloc+0x59/0x70 [ 30.844186] kmem_cache_alloc+0x16b/0x370 [ 30.844714] vm_area_dup+0x20/0x160 [ 30.845164] __split_vma+0x170/0x950 [ 30.845630] split_vma+0xc6/0x110 [ 30.846066] mprotect_fixup+0x8d2/0xb30 [ 30.846565] do_mprotect_pkey+0x87e/0xd40 [ 30.847097] __x64_sys_mprotect+0x78/0xc0 [ 30.847619] do_syscall_64+0x3f/0x90 [ 30.848099] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.848746] [ 30.848959] Freed by task 203: [ 30.849352] kasan_save_stack+0x22/0x50 [ 30.849868] kasan_set_track+0x25/0x30 [ 30.850369] kasan_save_free_info+0x2b/0x50 [ 30.850918] __kasan_slab_free+0x10a/0x190 [ 30.851449] kmem_cache_free+0x10d/0x4d0 [ 30.851963] rcu_core+0x8c8/0x2860 [ 30.852409] __do_softirq+0x1b7/0x7d4 [ 30.852884] [ 30.853099] Last potentially related work creation: [ 30.853683] kasan_save_stack+0x22/0x50 [ 30.854185] __kasan_record_aux_stack+0x8e/0xa0 [ 30.854789] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.855427] remove_vma+0x139/0x170 [ 30.855877] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.856432] do_vmi_munmap+0x1f1/0x2b0 [ 30.856913] __vm_munmap+0x138/0x3a0 [ 30.857379] __x64_sys_munmap+0x59/0x80 [ 30.857876] do_syscall_64+0x3f/0x90 [ 30.858352] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.859006] [ 30.859221] Second to last potentially related work creation: [ 30.859896] kasan_save_stack+0x22/0x50 [ 30.860394] __kasan_record_aux_stack+0x8e/0xa0 [ 30.860964] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.861609] remove_vma+0x139/0x170 [ 30.862062] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.862610] do_vmi_munmap+0x1f1/0x2b0 [ 30.863104] mmap_region+0x1f9/0x2660 [ 30.863589] do_mmap+0x854/0xf00 [ 30.864025] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.864509] ksys_mmap_pgoff+0x3af/0x500 [ 30.865010] do_syscall_64+0x3f/0x90 [ 30.865483] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.866129] [ 30.866344] The buggy address belongs to the object at ffff88800f7af9f8 [ 30.866344] which belongs to the cache vm_area_struct of size 168 [ 30.867819] The buggy address is located 88 bytes inside of [ 30.867819] freed 168-byte region [ffff88800f7af9f8, ffff88800f7afaa0) [ 30.869200] [ 30.869415] The buggy address belongs to the physical page: [ 30.870068] page:00000000f1afd1fe refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf7af [ 30.871154] memcg:ffff8880166d7601 [ 30.871582] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.872273] page_type: 0xffffffff() [ 30.872721] raw: 0100000000000200 ffff8880087a0c80 ffffea00002537c0 dead000000000003 [ 30.873629] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880166d7601 [ 30.874543] page dumped because: kasan: bad access detected [ 30.875225] [ 30.875440] Memory state around the buggy address: [ 30.876011] ffff88800f7af900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.876860] ffff88800f7af980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 30.877715] >ffff88800f7afa00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.878563] ^ [ 30.879279] ffff88800f7afa80: fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 [ 30.880121] ffff88800f7afb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.880960] ================================================================== [ 30.882004] Disabling lock debugging due to kernel taint [ 32.799309] BUG: Bad rss-counter state mm:000000009ea359b0 type:MM_FILEPAGES val:33 [ 32.800388] BUG: Bad rss-counter state mm:000000009ea359b0 type:MM_ANONPAGES val:22 [ 33.281863] BUG: Bad rss-counter state mm:00000000932b3cde type:MM_FILEPAGES val:33 [ 33.283090] BUG: Bad rss-counter state mm:00000000932b3cde type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62655' (ECDSA) to the list of known hosts. 2023/06/21 07:39:28 fuzzer started 2023/06/21 07:39:29 dialing manager at localhost:36067 2023/06/21 07:39:29 checking machine... 2023/06/21 07:39:29 checking revisions... [ 34.028216] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:39:29 testing simple program... [ 34.082469] cgroup: Unknown subsys name 'net' [ 34.136219] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:39:28 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007f18489d78a0 CR3=000000000eaa6000 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=2515545df500798a12481d37a5522b9f XMM02=ec2efd57dc4c00df000000000011a758 XMM03=27754eb84adf40bb000000000011a828 XMM04=fe8ef4b446ce317200000000000ae988 XMM05=87405038505894b000000000001344b8 XMM06=6990c16e97cf7a910000000000133258 XMM07=fb795ef6d65770560000000000122148 XMM08=2c67c8bc2e329bc3000000000011a7c8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0c09f25 RBX=ffffffff8604f928 RCX=ffffffff8451203c RDX=0000000000000000 RSI=ffffffff864b3418 RDI=ffffffff8604f924 RBP=ffffffff8604f924 RSP=ffff8880102e7908 R8 =ffffffff864b3418 R9 =ffff8880102e7a00 R10=0000000000038001 R11=00000000000b53d8 R12=ffffffff8604f930 R13=ffffffff8604f924 R14=ffffffff8604f924 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000212 [----A--] 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 00007f0c3efc5900 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=00007ffefac4a000 CR3=000000000ec76000 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=000000000000000000ffff0000000000 XMM02=2f00646f6874656d5f74707972636e65 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ff00ffffffffffffffffffffffffffff XMM08=20002020202020200020202020202020 XMM09=0000ffffffffffffffffffffffffffff XMM10=00002020202020200020202020202020 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000