syzkaller login: [ 33.899446] BUG: Bad rss-counter state mm:000000003a48fb76 type:MM_FILEPAGES val:33 [ 33.900738] BUG: Bad rss-counter state mm:000000003a48fb76 type:MM_ANONPAGES val:22 [ 33.977693] ================================================================== [ 33.978726] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.979766] Read of size 8 at addr ffff888016c316b0 by task sshd/220 [ 33.980734] [ 33.980973] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.981922] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.983017] Call Trace: [ 33.983356] [ 33.983664] dump_stack_lvl+0x91/0xf0 [ 33.984209] print_report+0xcc/0x620 [ 33.984721] ? __virt_addr_valid+0x102/0x340 [ 33.985324] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.985992] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.986676] kasan_report+0xbe/0xf0 [ 33.987187] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.987856] vma_interval_tree_remove+0xc75/0xec0 [ 33.988512] vma_prepare+0xc54/0x11a0 [ 33.989032] __split_vma+0x5af/0x950 [ 33.989541] ? __pfx___split_vma+0x10/0x10 [ 33.990109] ? find_held_lock+0x2c/0x110 [ 33.990684] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.991306] ? lock_is_held_type+0x9f/0x120 [ 33.991882] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.992534] ? mtree_range_walk+0x632/0x900 [ 33.993127] ? mas_walk+0x5c7/0x7c0 [ 33.993638] do_vmi_munmap+0x1f1/0x2b0 [ 33.994168] mmap_region+0x1f9/0x2660 [ 33.994705] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.995256] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.996021] ? __pfx_lock_acquire+0x10/0x10 [ 33.996589] ? __pfx_mmap_region+0x10/0x10 [ 33.997155] ? security_mmap_addr+0x7d/0xa0 [ 33.997724] ? get_unmapped_area+0x1f5/0x3f0 [ 33.998323] do_mmap+0x854/0xf00 [ 33.998796] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.999325] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.999930] ksys_mmap_pgoff+0x3af/0x500 [ 34.000478] do_syscall_64+0x3f/0x90 [ 34.000996] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.001699] RIP: 0033:0x7fcb0947cd82 [ 34.002199] 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 [ 34.004513] RSP: 002b:00007ffd33934f68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.005482] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fcb0947cd82 [ 34.006405] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fcb088b6000 [ 34.007320] RBP: 00007fcb088b6000 R08: 0000000000000009 R09: 0000000000001000 [ 34.008234] R10: 0000000000000812 R11: 0000000000000206 R12: 00005583ffbd5ec0 [ 34.009150] R13: 00007ffd33934f80 R14: 00007ffd33934fb0 R15: 00007ffd33935310 [ 34.010081] [ 34.010399] [ 34.010629] Allocated by task 213: [ 34.011086] kasan_save_stack+0x22/0x50 [ 34.011637] kasan_set_track+0x25/0x30 [ 34.012161] __kasan_slab_alloc+0x59/0x70 [ 34.012719] kmem_cache_alloc+0x16b/0x370 [ 34.013280] vm_area_dup+0x20/0x160 [ 34.013780] __split_vma+0x170/0x950 [ 34.014298] split_vma+0xc6/0x110 [ 34.014769] mprotect_fixup+0x8d2/0xb30 [ 34.015304] do_mprotect_pkey+0x87e/0xd40 [ 34.015878] __x64_sys_mprotect+0x78/0xc0 [ 34.016442] do_syscall_64+0x3f/0x90 [ 34.016957] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.017649] [ 34.017882] Freed by task 203: [ 34.018314] kasan_save_stack+0x22/0x50 [ 34.018850] kasan_set_track+0x25/0x30 [ 34.019388] kasan_save_free_info+0x2b/0x50 [ 34.019969] __kasan_slab_free+0x10a/0x190 [ 34.020549] kmem_cache_free+0x10d/0x4d0 [ 34.021106] rcu_core+0x8c8/0x2860 [ 34.021581] __do_softirq+0x1b7/0x7d4 [ 34.022167] [ 34.022423] Last potentially related work creation: [ 34.023063] kasan_save_stack+0x22/0x50 [ 34.023616] __kasan_record_aux_stack+0x8e/0xa0 [ 34.024225] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.024923] remove_vma+0x139/0x170 [ 34.025412] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.026012] do_vmi_munmap+0x1f1/0x2b0 [ 34.026548] __vm_munmap+0x138/0x3a0 [ 34.027056] __x64_sys_munmap+0x59/0x80 [ 34.027600] do_syscall_64+0x3f/0x90 [ 34.028113] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.028809] [ 34.029041] The buggy address belongs to the object at ffff888016c31658 [ 34.029041] which belongs to the cache vm_area_struct of size 168 [ 34.030631] The buggy address is located 88 bytes inside of [ 34.030631] freed 168-byte region [ffff888016c31658, ffff888016c31700) [ 34.032153] [ 34.032389] The buggy address belongs to the physical page: [ 34.033092] page:00000000906263ac refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16c31 [ 34.034290] memcg:ffff88800d6f7e01 [ 34.034763] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.035466] page_type: 0xffffffff() [ 34.035966] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 34.036962] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d6f7e01 [ 34.037958] page dumped because: kasan: bad access detected [ 34.038675] [ 34.038909] Memory state around the buggy address: [ 34.039549] ffff888016c31580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 34.040495] ffff888016c31600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 34.041430] >ffff888016c31680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.042360] ^ [ 34.043000] ffff888016c31700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 34.043943] ffff888016c31780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 34.044874] ================================================================== [ 34.045925] Disabling lock debugging due to kernel taint [ 36.807555] BUG: Bad rss-counter state mm:000000006a732095 type:MM_FILEPAGES val:33 [ 36.808594] BUG: Bad rss-counter state mm:000000006a732095 type:MM_ANONPAGES val:22 [ 37.290708] BUG: Bad rss-counter state mm:00000000e2d40eed type:MM_FILEPAGES val:33 [ 37.291781] BUG: Bad rss-counter state mm:00000000e2d40eed type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:64826' (ECDSA) to the list of known hosts. 2023/06/19 23:52:05 fuzzer started 2023/06/19 23:52:05 dialing manager at localhost:44161 2023/06/19 23:52:05 checking machine... 2023/06/19 23:52:05 checking revisions... [ 38.052545] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:52:06 testing simple program... [ 38.108057] cgroup: Unknown subsys name 'net' [ 38.145785] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:52:02 Registers: info registers vcpu 0 RAX=fffffbfff0ba77db RBX=0000000000000000 RCX=ffffffff81534376 RDX=fffffbfff0ba77db RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=fffffbfff0ba77da RSP=ffff88806ce09d70 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffff88806ce361c8 R13=ffffffff87b67200 R14=0000000000000000 R15=0000000000000001 RIP=ffffffff8180efaf RFL=00000046 [---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 00007fc7a0cc0900 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=00007fc7a1275650 CR3=000000000e760000 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=ffffffff00ffffffffffffffffffffff XMM01=707465675f6c697475646f6d6d61705f XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007ffd470a2ed8 CR3=0000000005482000 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=00007ff9b0de15100000562e55dd7790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000