syzkaller login: [ 30.800435] BUG: Bad rss-counter state mm:00000000fb98fe3b type:MM_FILEPAGES val:33 [ 30.801465] BUG: Bad rss-counter state mm:00000000fb98fe3b type:MM_ANONPAGES val:22 [ 30.972851] ================================================================== [ 30.973969] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.975152] Read of size 8 at addr ffff888019d90968 by task sshd/220 [ 30.975956] [ 30.976179] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.977076] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.978091] Call Trace: [ 30.978426] [ 30.978724] dump_stack_lvl+0x91/0xf0 [ 30.979220] print_report+0xcc/0x620 [ 30.979699] ? __virt_addr_valid+0x102/0x340 [ 30.980253] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.980875] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.981485] kasan_report+0xbe/0xf0 [ 30.981968] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.982601] vma_interval_tree_remove+0xc75/0xec0 [ 30.983214] vma_prepare+0xc54/0x11a0 [ 30.983697] __split_vma+0x5af/0x950 [ 30.984179] ? __pfx___split_vma+0x10/0x10 [ 30.984721] ? find_held_lock+0x2c/0x110 [ 30.985257] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.985830] ? lock_is_held_type+0x9f/0x120 [ 30.986394] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.987003] ? mtree_range_walk+0x632/0x900 [ 30.987558] ? mas_walk+0x5c7/0x7c0 [ 30.988037] do_vmi_munmap+0x1f1/0x2b0 [ 30.988544] mmap_region+0x1f9/0x2660 [ 30.989032] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.989545] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.990267] ? __pfx_lock_acquire+0x10/0x10 [ 30.990815] ? __pfx_mmap_region+0x10/0x10 [ 30.991348] ? security_mmap_addr+0x7d/0xa0 [ 30.991880] ? get_unmapped_area+0x1f5/0x3f0 [ 30.992443] do_mmap+0x854/0xf00 [ 30.992890] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.993387] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.993948] ksys_mmap_pgoff+0x3af/0x500 [ 30.994483] do_syscall_64+0x3f/0x90 [ 30.994968] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.995621] RIP: 0033:0x7ff283054d82 [ 30.996083] 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 [ 30.998221] RSP: 002b:00007fff831c55b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.999145] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff283054d82 [ 31.000064] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff28248e000 [ 31.000914] RBP: 00007ff28248e000 R08: 0000000000000009 R09: 0000000000001000 [ 31.001761] R10: 0000000000000812 R11: 0000000000000206 R12: 000055eedae61ec0 [ 31.002640] R13: 00007fff831c55d0 R14: 00007fff831c5600 R15: 00007fff831c5960 [ 31.003497] [ 31.003786] [ 31.004001] Allocated by task 213: [ 31.004432] kasan_save_stack+0x22/0x50 [ 31.004940] kasan_set_track+0x25/0x30 [ 31.005434] __kasan_slab_alloc+0x59/0x70 [ 31.005959] kmem_cache_alloc+0x16b/0x370 [ 31.006486] vm_area_dup+0x20/0x160 [ 31.006940] __split_vma+0x170/0x950 [ 31.007404] split_vma+0xc6/0x110 [ 31.007843] mprotect_fixup+0x8d2/0xb30 [ 31.008346] do_mprotect_pkey+0x87e/0xd40 [ 31.008870] __x64_sys_mprotect+0x78/0xc0 [ 31.009394] do_syscall_64+0x3f/0x90 [ 31.009878] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.010534] [ 31.010751] Freed by task 19: [ 31.011141] kasan_save_stack+0x22/0x50 [ 31.011645] kasan_set_track+0x25/0x30 [ 31.012142] kasan_save_free_info+0x2b/0x50 [ 31.012673] __kasan_slab_free+0x10a/0x190 [ 31.013210] kmem_cache_free+0x10d/0x4d0 [ 31.013721] rcu_core+0x8c8/0x2860 [ 31.014170] __do_softirq+0x1b7/0x7d4 [ 31.014667] [ 31.014884] Last potentially related work creation: [ 31.015468] kasan_save_stack+0x22/0x50 [ 31.015977] __kasan_record_aux_stack+0x8e/0xa0 [ 31.016623] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.017267] remove_vma+0x139/0x170 [ 31.017720] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.018279] do_vmi_munmap+0x1f1/0x2b0 [ 31.018791] __vm_munmap+0x138/0x3a0 [ 31.019268] __x64_sys_munmap+0x59/0x80 [ 31.019776] do_syscall_64+0x3f/0x90 [ 31.020256] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.020911] [ 31.021131] The buggy address belongs to the object at ffff888019d90910 [ 31.021131] which belongs to the cache vm_area_struct of size 168 [ 31.022620] The buggy address is located 88 bytes inside of [ 31.022620] freed 168-byte region [ffff888019d90910, ffff888019d909b8) [ 31.024043] [ 31.024263] The buggy address belongs to the physical page: [ 31.024926] page:0000000083352485 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19d90 [ 31.026023] memcg:ffff88801a371f01 [ 31.026462] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.027114] page_type: 0xffffffff() [ 31.027564] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.028483] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a371f01 [ 31.029392] page dumped because: kasan: bad access detected [ 31.030052] [ 31.030270] Memory state around the buggy address: [ 31.030874] ffff888019d90800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 31.031735] ffff888019d90880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 31.032594] >ffff888019d90900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.033446] ^ [ 31.034226] ffff888019d90980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 31.035132] ffff888019d90a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.035990] ================================================================== [ 31.037238] Disabling lock debugging due to kernel taint [ 33.155350] BUG: Bad rss-counter state mm:000000000e904d76 type:MM_FILEPAGES val:33 [ 33.156350] BUG: Bad rss-counter state mm:000000000e904d76 type:MM_ANONPAGES val:22 [ 33.649393] BUG: Bad rss-counter state mm:00000000041dddc4 type:MM_FILEPAGES val:33 [ 33.650642] BUG: Bad rss-counter state mm:00000000041dddc4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:19740' (ECDSA) to the list of known hosts. 2023/06/20 16:18:19 fuzzer started 2023/06/20 16:18:19 dialing manager at localhost:36067 2023/06/20 16:18:19 checking machine... 2023/06/20 16:18:19 checking revisions... [ 34.365548] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:18:19 testing simple program... [ 34.413939] cgroup: Unknown subsys name 'net' [ 34.470859] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:18:18 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=0000000000000081 RCX=0000000080000000 RDX=ffff88800fd8d1c0 RSI=ffffffff81f1747c RDI=0000000000000007 RBP=ffff888008c28768 RSP=ffff888018f4f850 R8 =0000000000000007 R9 =fffffffffffff000 R10=ffff8880087c32f0 R11=0000000000000001 R12=ffff8880087c32f0 R13=0000000010000000 R14=1ffff110031e9f0d R15=0000000000000000 RIP=ffffffff814c0871 RFL=00000287 [--S--PC] 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 00007faa3862d900 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=00007faa38be2650 CR3=000000000e8aa000 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=0000000000000000 RBX=ffff88806cf2c240 RCX=0000000000000000 RDX=ffff888008d951c0 RSI=ffff88806cf2c240 RDI=0000000000000001 RBP=0000000000000000 RSP=ffff888008e07e10 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=ffff888008c04400 R12=ffff88806cf2c2f8 R13=1ffff110011c0fd3 R14=0000000000000001 R15=0000000000000000 RIP=ffffffff813fa732 RFL=00000093 [--S-A-C] 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=00007f0238a12f80 CR3=000000000d9bc000 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=d36dbc4cb6e7d084bf4e1b486887232b XMM02=000000000011dda8ec2efd57dc4c00df XMM03=0000000000122470b6b2920970c4863d XMM04=51e145e5d0caef1300000000000ae988 XMM05=19e9129bd510f23500000000001322f0 XMM06=4ca897287da635f00000000000131158 XMM07=e042d86d42eb936e00000000001226f0 XMM08=b6b2920970c4863d000000000011de08 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000