syzkaller login: [ 28.881897] BUG: Bad rss-counter state mm:00000000666d5906 type:MM_FILEPAGES val:33 [ 28.883404] BUG: Bad rss-counter state mm:00000000666d5906 type:MM_ANONPAGES val:22 [ 29.045301] ================================================================== [ 29.046212] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.047159] Read of size 8 at addr ffff88800e1c3798 by task sshd/219 [ 29.047921] [ 29.048224] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 29.049104] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.050078] Call Trace: [ 29.050395] [ 29.050704] dump_stack_lvl+0x91/0xf0 [ 29.051194] print_report+0xcc/0x620 [ 29.051691] ? __virt_addr_valid+0x102/0x340 [ 29.052245] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.052871] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.053491] kasan_report+0xbe/0xf0 [ 29.053971] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.054612] vma_interval_tree_remove+0xc75/0xec0 [ 29.055218] vma_prepare+0xc54/0x11a0 [ 29.055696] __split_vma+0x5af/0x950 [ 29.056174] ? __pfx___split_vma+0x10/0x10 [ 29.056703] ? find_held_lock+0x2c/0x110 [ 29.057234] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.057798] ? lock_is_held_type+0x9f/0x120 [ 29.058333] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.058953] ? mtree_range_walk+0x632/0x900 [ 29.059511] ? mas_walk+0x5c7/0x7c0 [ 29.059988] do_vmi_munmap+0x1f1/0x2b0 [ 29.060484] mmap_region+0x1f9/0x2660 [ 29.060965] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.061476] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.062193] ? __pfx_lock_acquire+0x10/0x10 [ 29.062744] ? __pfx_mmap_region+0x10/0x10 [ 29.063276] ? security_mmap_addr+0x7d/0xa0 [ 29.063814] ? get_unmapped_area+0x1f5/0x3f0 [ 29.064358] do_mmap+0x854/0xf00 [ 29.064801] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.065297] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.065860] ksys_mmap_pgoff+0x3af/0x500 [ 29.066376] do_syscall_64+0x3f/0x90 [ 29.066865] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.067507] RIP: 0033:0x7fc23ba6fd82 [ 29.067962] 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 [ 29.070087] RSP: 002b:00007ffecc4bff58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.071027] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc23ba6fd82 [ 29.071882] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc23aea9000 [ 29.072725] RBP: 00007fc23aea9000 R08: 0000000000000009 R09: 0000000000001000 [ 29.073573] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556e68a8bec0 [ 29.074423] R13: 00007ffecc4bff70 R14: 00007ffecc4bffa0 R15: 00007ffecc4c0300 [ 29.075296] [ 29.075590] [ 29.075805] Allocated by task 211: [ 29.076235] kasan_save_stack+0x22/0x50 [ 29.076764] kasan_set_track+0x25/0x30 [ 29.077274] __kasan_slab_alloc+0x59/0x70 [ 29.077816] kmem_cache_alloc+0x16b/0x370 [ 29.078344] vm_area_dup+0x20/0x160 [ 29.078837] __split_vma+0x170/0x950 [ 29.079313] split_vma+0xc6/0x110 [ 29.079770] mprotect_fixup+0x8d2/0xb30 [ 29.080287] do_mprotect_pkey+0x87e/0xd40 [ 29.080827] __x64_sys_mprotect+0x78/0xc0 [ 29.081373] do_syscall_64+0x3f/0x90 [ 29.081874] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.082543] [ 29.082774] Freed by task 211: [ 29.083179] kasan_save_stack+0x22/0x50 [ 29.083708] kasan_set_track+0x25/0x30 [ 29.084229] kasan_save_free_info+0x2b/0x50 [ 29.084768] __kasan_slab_free+0x10a/0x190 [ 29.085294] kmem_cache_free+0x10d/0x4d0 [ 29.085796] rcu_core+0x8c8/0x2860 [ 29.086236] __do_softirq+0x1b7/0x7d4 [ 29.086721] [ 29.086933] Last potentially related work creation: [ 29.087515] kasan_save_stack+0x22/0x50 [ 29.088023] __kasan_record_aux_stack+0x8e/0xa0 [ 29.088595] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.089238] remove_vma+0x139/0x170 [ 29.089776] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.090331] do_vmi_munmap+0x1f1/0x2b0 [ 29.090827] __vm_munmap+0x138/0x3a0 [ 29.091291] __x64_sys_munmap+0x59/0x80 [ 29.091786] do_syscall_64+0x3f/0x90 [ 29.092253] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.092895] [ 29.093120] Second to last potentially related work creation: [ 29.093803] kasan_save_stack+0x22/0x50 [ 29.094303] __kasan_record_aux_stack+0x8e/0xa0 [ 29.094881] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.095521] remove_vma+0x139/0x170 [ 29.095969] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.096521] do_vmi_munmap+0x1f1/0x2b0 [ 29.097011] mmap_region+0x1f9/0x2660 [ 29.097486] do_mmap+0x854/0xf00 [ 29.097915] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.098401] ksys_mmap_pgoff+0x3af/0x500 [ 29.098911] do_syscall_64+0x3f/0x90 [ 29.099383] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.100014] [ 29.100227] The buggy address belongs to the object at ffff88800e1c3740 [ 29.100227] which belongs to the cache vm_area_struct of size 168 [ 29.101736] The buggy address is located 88 bytes inside of [ 29.101736] freed 168-byte region [ffff88800e1c3740, ffff88800e1c37e8) [ 29.103146] [ 29.103366] The buggy address belongs to the physical page: [ 29.104020] page:000000002db315c7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe1c3 [ 29.105086] memcg:ffff88800e5b8401 [ 29.105505] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 29.106192] page_type: 0xffffffff() [ 29.106659] raw: 0100000000000200 ffff88800879fc80 ffffea000036b3c0 dead000000000003 [ 29.107563] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e5b8401 [ 29.108462] page dumped because: kasan: bad access detected [ 29.109117] [ 29.109329] Memory state around the buggy address: [ 29.109908] ffff88800e1c3680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 29.110765] ffff88800e1c3700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 29.111605] >ffff88800e1c3780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 29.112445] ^ [ 29.112944] ffff88800e1c3800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 29.113785] ffff88800e1c3880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 29.114634] ================================================================== [ 29.115573] Disabling lock debugging due to kernel taint [ 31.897197] BUG: Bad rss-counter state mm:0000000070c524b8 type:MM_FILEPAGES val:33 [ 31.898084] BUG: Bad rss-counter state mm:0000000070c524b8 type:MM_ANONPAGES val:22 [ 32.272092] BUG: Bad rss-counter state mm:00000000ec79191b type:MM_FILEPAGES val:33 [ 32.272904] BUG: Bad rss-counter state mm:00000000ec79191b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:29369' (ECDSA) to the list of known hosts. 2023/06/19 20:59:26 fuzzer started 2023/06/19 20:59:26 dialing manager at localhost:44161 2023/06/19 20:59:26 checking machine... 2023/06/19 20:59:26 checking revisions... [ 32.932159] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:59:26 testing simple program... [ 32.981482] cgroup: Unknown subsys name 'net' [ 33.022672] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:59:26 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff8613753e RDX=1ffff11001abdf24 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff88800d5ef930 RSP=ffff88800d5ef868 R8 =ffffffff86137542 R9 =ffff88800d5ef918 R10=0000000000038001 R11=0000000000020d8a R12=ffff88800d5ef938 R13=ffff88800d5ef920 R14=0000000000000005 R15=ffff88800d5ef8d8 RIP=ffffffff81130b54 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 00007f14caf7c900 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=00007fff0ef1f000 CR3=000000000f6bc000 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=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 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff888019b7c000 RCX=ffffffff818466bf RDX=0000000000000000 RSI=0000000000000004 RDI=ffff88800ca522f0 RBP=ffff88800ca52260 RSP=ffff888008e57cc8 R8 =0000000000000000 R9 =ffffed100194a45e R10=ffff88800ca522f3 R11=0000000000000128 R12=ffff88800ca522f0 R13=ffff88800ca522a0 R14=ffffffff818d9dc6 R15=ffff888016631580 RIP=ffffffff818466d4 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 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=00007ff17e94e610 CR3=000000000d7c0000 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=724e6a6b417bf38c82445abacc8cac76 XMM02=2c67c8bc2e329bc3000000000011d658 XMM03=fb795ef6d65770560000000000123fa0 XMM04=27d5389a44079f6b00000000000ae988 XMM05=dfcdbad4f1609c370000000000135670 XMM06=806171799158d96700000000001354f8 XMM07=e042d86d42eb936e0000000000124278 XMM08=0583774a0967315d000000000011d6b8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000