syzkaller login: [ 30.426298] BUG: Bad rss-counter state mm:000000003bf95f98 type:MM_FILEPAGES val:33 [ 30.427579] BUG: Bad rss-counter state mm:000000003bf95f98 type:MM_ANONPAGES val:22 [ 30.587037] ================================================================== [ 30.588136] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.589344] Read of size 8 at addr ffff88800d7d73f8 by task sshd/220 [ 30.590066] [ 30.590274] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.591085] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.592057] Call Trace: [ 30.592360] [ 30.592629] dump_stack_lvl+0x91/0xf0 [ 30.593095] print_report+0xcc/0x620 [ 30.593555] ? __virt_addr_valid+0x102/0x340 [ 30.594080] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.594664] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.595244] kasan_report+0xbe/0xf0 [ 30.595705] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.596289] vma_interval_tree_remove+0xc75/0xec0 [ 30.596892] vma_prepare+0xc54/0x11a0 [ 30.597382] __split_vma+0x5af/0x950 [ 30.597852] ? __pfx___split_vma+0x10/0x10 [ 30.598382] ? find_held_lock+0x2c/0x110 [ 30.598903] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.599484] ? lock_is_held_type+0x9f/0x120 [ 30.600026] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.600636] ? mtree_range_walk+0x632/0x900 [ 30.601188] ? mas_walk+0x5c7/0x7c0 [ 30.601660] do_vmi_munmap+0x1f1/0x2b0 [ 30.602163] mmap_region+0x1f9/0x2660 [ 30.602645] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.603165] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.603887] ? __pfx_lock_acquire+0x10/0x10 [ 30.604423] ? __pfx_mmap_region+0x10/0x10 [ 30.604956] ? security_mmap_addr+0x7d/0xa0 [ 30.605490] ? get_unmapped_area+0x1f5/0x3f0 [ 30.606045] do_mmap+0x854/0xf00 [ 30.606480] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.606967] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.607548] ksys_mmap_pgoff+0x3af/0x500 [ 30.608045] do_syscall_64+0x3f/0x90 [ 30.608531] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.609169] RIP: 0033:0x7f6c58077d82 [ 30.609628] 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 [ 30.611781] RSP: 002b:00007ffdd82d6bd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.612739] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6c58077d82 [ 30.613578] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6c574b1000 [ 30.614426] RBP: 00007f6c574b1000 R08: 0000000000000009 R09: 0000000000001000 [ 30.615272] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f3ec6b7ec0 [ 30.616142] R13: 00007ffdd82d6bf0 R14: 00007ffdd82d6c20 R15: 00007ffdd82d6f80 [ 30.616999] [ 30.617288] [ 30.617502] Allocated by task 213: [ 30.617936] kasan_save_stack+0x22/0x50 [ 30.618429] kasan_set_track+0x25/0x30 [ 30.618918] __kasan_slab_alloc+0x59/0x70 [ 30.619437] kmem_cache_alloc+0x16b/0x370 [ 30.619961] vm_area_dup+0x20/0x160 [ 30.620410] __split_vma+0x170/0x950 [ 30.620880] split_vma+0xc6/0x110 [ 30.621321] mprotect_fixup+0x8d2/0xb30 [ 30.621821] do_mprotect_pkey+0x87e/0xd40 [ 30.622345] __x64_sys_mprotect+0x78/0xc0 [ 30.622869] do_syscall_64+0x3f/0x90 [ 30.623343] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.624010] [ 30.624226] Freed by task 213: [ 30.624616] kasan_save_stack+0x22/0x50 [ 30.625116] kasan_set_track+0x25/0x30 [ 30.625602] kasan_save_free_info+0x2b/0x50 [ 30.626132] __kasan_slab_free+0x10a/0x190 [ 30.626671] kmem_cache_free+0x10d/0x4d0 [ 30.627176] rcu_core+0x8c8/0x2860 [ 30.627617] __do_softirq+0x1b7/0x7d4 [ 30.628092] [ 30.628307] Last potentially related work creation: [ 30.628884] kasan_save_stack+0x22/0x50 [ 30.629381] __kasan_record_aux_stack+0x8e/0xa0 [ 30.629957] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.630575] remove_vma+0x139/0x170 [ 30.631002] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.631534] do_vmi_munmap+0x1f1/0x2b0 [ 30.631993] __vm_munmap+0x138/0x3a0 [ 30.632434] __x64_sys_munmap+0x59/0x80 [ 30.632899] do_syscall_64+0x3f/0x90 [ 30.633350] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.633955] [ 30.634159] The buggy address belongs to the object at ffff88800d7d73a0 [ 30.634159] which belongs to the cache vm_area_struct of size 168 [ 30.635542] The buggy address is located 88 bytes inside of [ 30.635542] freed 168-byte region [ffff88800d7d73a0, ffff88800d7d7448) [ 30.636866] [ 30.637071] The buggy address belongs to the physical page: [ 30.637692] page:000000003f31860e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd7d7 [ 30.638711] memcg:ffff8880195d4401 [ 30.639114] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.639723] page_type: 0xffffffff() [ 30.640146] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.641015] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880195d4401 [ 30.641897] page dumped because: kasan: bad access detected [ 30.642554] [ 30.642769] Memory state around the buggy address: [ 30.643370] ffff88800d7d7280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 30.644229] ffff88800d7d7300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 30.645086] >ffff88800d7d7380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.645935] ^ [ 30.646780] ffff88800d7d7400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.647640] ffff88800d7d7480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.648485] ================================================================== [ 30.649596] Disabling lock debugging due to kernel taint [ 33.351998] BUG: Bad rss-counter state mm:00000000afc0227f type:MM_FILEPAGES val:33 [ 33.353211] BUG: Bad rss-counter state mm:00000000afc0227f type:MM_ANONPAGES val:22 [ 33.896592] BUG: Bad rss-counter state mm:00000000dc066d67 type:MM_FILEPAGES val:33 [ 33.898114] BUG: Bad rss-counter state mm:00000000dc066d67 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:54951' (ECDSA) to the list of known hosts. 2023/06/20 19:01:02 fuzzer started 2023/06/20 19:01:03 dialing manager at localhost:36067 2023/06/20 19:01:03 checking machine... 2023/06/20 19:01:03 checking revisions... [ 34.642836] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:01:03 testing simple program... [ 34.691157] cgroup: Unknown subsys name 'net' [ 34.769412] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:01:02 Registers: info registers vcpu 0 RAX=1ffffffff0c24399 RBX=0000000000000001 RCX=ffffffff86121ccc RDX=0000000000000000 RSI=dffffc0000000000 RDI=ffffffff86121cce RBP=ffff88806ce09aa8 RSP=ffff88806ce099e0 R8 =ffffffff86121cd0 R9 =ffff88806ce09a90 R10=0000000000038001 R11=000000000001cff6 R12=ffff88806ce09ab0 R13=ffff88806ce09a98 R14=ffff8880142b77c8 R15=ffff88806ce09a50 RIP=ffffffff811311c7 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 00007f3a1db8d700 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=00007fffe0541000 CR3=000000000ed94000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3932325b646873732032303a3130 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363937 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806c400000 RBX=0000000055c09a8f RCX=ffff88806c44d478 RDX=000000000000000c RSI=0000000000000003 RDI=00000000f2bd9846 RBP=ffff88800da62cb0 RSP=ffff88800f1bf9a8 R8 =00000000d6092403 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=ffff88800f1bfa10 R15=000000000000000c RIP=ffffffff822704d3 RFL=00000202 [-------] 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 00007f90522b8900 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=00007f787f7299c0 CR3=000000001584a000 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=563412feff00545000000000000080fe XMM01=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000