syzkaller login: [ 31.887113] BUG: Bad rss-counter state mm:00000000cb22eb92 type:MM_FILEPAGES val:33 [ 31.888301] BUG: Bad rss-counter state mm:00000000cb22eb92 type:MM_ANONPAGES val:22 [ 31.989379] ================================================================== [ 31.990267] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.991148] Read of size 8 at addr ffff888018823310 by task sshd/220 [ 31.991870] [ 31.992080] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.992987] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.993947] Call Trace: [ 31.994276] [ 31.994544] dump_stack_lvl+0x91/0xf0 [ 31.995008] print_report+0xcc/0x620 [ 31.995469] ? __virt_addr_valid+0x102/0x340 [ 31.995993] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.996579] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.997162] kasan_report+0xbe/0xf0 [ 31.997618] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.998216] vma_interval_tree_remove+0xc75/0xec0 [ 31.998820] vma_prepare+0xc54/0x11a0 [ 31.999295] __split_vma+0x5af/0x950 [ 31.999761] ? __pfx___split_vma+0x10/0x10 [ 32.000290] ? find_held_lock+0x2c/0x110 [ 32.000811] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.001374] ? lock_is_held_type+0x9f/0x120 [ 32.001907] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.002514] ? mtree_range_walk+0x632/0x900 [ 32.003066] ? mas_walk+0x5c7/0x7c0 [ 32.003540] do_vmi_munmap+0x1f1/0x2b0 [ 32.004026] mmap_region+0x1f9/0x2660 [ 32.004499] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.005016] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.005717] ? __pfx_lock_acquire+0x10/0x10 [ 32.006274] ? __pfx_mmap_region+0x10/0x10 [ 32.006801] ? security_mmap_addr+0x7d/0xa0 [ 32.007339] ? get_unmapped_area+0x1f5/0x3f0 [ 32.007890] do_mmap+0x854/0xf00 [ 32.008324] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.008820] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.009373] ksys_mmap_pgoff+0x3af/0x500 [ 32.009874] do_syscall_64+0x3f/0x90 [ 32.010356] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.010997] RIP: 0033:0x7f45ececad82 [ 32.011451] 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 [ 32.013572] RSP: 002b:00007fff22672c88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.014484] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f45ececad82 [ 32.015321] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f45ec304000 [ 32.016161] RBP: 00007f45ec304000 R08: 0000000000000009 R09: 0000000000001000 [ 32.017007] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d66c8a6d90 [ 32.017846] R13: 00007fff22672ca0 R14: 00007fff22672cd0 R15: 00007fff22673030 [ 32.018716] [ 32.019011] [ 32.019228] Allocated by task 213: [ 32.019654] kasan_save_stack+0x22/0x50 [ 32.020155] kasan_set_track+0x25/0x30 [ 32.020634] __kasan_slab_alloc+0x59/0x70 [ 32.021155] kmem_cache_alloc+0x16b/0x370 [ 32.021668] vm_area_dup+0x20/0x160 [ 32.022118] __split_vma+0x170/0x950 [ 32.022562] split_vma+0xc6/0x110 [ 32.022978] mprotect_fixup+0x8d2/0xb30 [ 32.023451] do_mprotect_pkey+0x87e/0xd40 [ 32.023943] __x64_sys_mprotect+0x78/0xc0 [ 32.024435] do_syscall_64+0x3f/0x90 [ 32.024878] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.025516] [ 32.025731] Freed by task 213: [ 32.026131] kasan_save_stack+0x22/0x50 [ 32.026635] kasan_set_track+0x25/0x30 [ 32.027104] kasan_save_free_info+0x2b/0x50 [ 32.027623] __kasan_slab_free+0x10a/0x190 [ 32.028125] kmem_cache_free+0x10d/0x4d0 [ 32.028618] rcu_core+0x8c8/0x2860 [ 32.029036] __do_softirq+0x1b7/0x7d4 [ 32.029514] [ 32.029730] Last potentially related work creation: [ 32.030326] kasan_save_stack+0x22/0x50 [ 32.030827] __kasan_record_aux_stack+0x8e/0xa0 [ 32.031397] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.032038] remove_vma+0x139/0x170 [ 32.032494] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.033049] do_vmi_munmap+0x1f1/0x2b0 [ 32.033534] __vm_munmap+0x138/0x3a0 [ 32.034009] __x64_sys_munmap+0x59/0x80 [ 32.034564] do_syscall_64+0x3f/0x90 [ 32.035032] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.035671] [ 32.035886] The buggy address belongs to the object at ffff8880188232b8 [ 32.035886] which belongs to the cache vm_area_struct of size 168 [ 32.037350] The buggy address is located 88 bytes inside of [ 32.037350] freed 168-byte region [ffff8880188232b8, ffff888018823360) [ 32.038771] [ 32.038989] The buggy address belongs to the physical page: [ 32.039651] page:000000004a825b89 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18823 [ 32.040744] memcg:ffff88800e2b6801 [ 32.041168] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.041807] page_type: 0xffffffff() [ 32.042284] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.043199] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e2b6801 [ 32.044094] page dumped because: kasan: bad access detected [ 32.044744] [ 32.044957] Memory state around the buggy address: [ 32.045531] ffff888018823200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 32.046366] ffff888018823280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 32.047203] >ffff888018823300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 32.048016] ^ [ 32.048477] ffff888018823380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 32.049305] ffff888018823400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 32.050135] ================================================================== [ 32.051214] Disabling lock debugging due to kernel taint [ 33.816594] BUG: Bad rss-counter state mm:00000000247f92ec type:MM_FILEPAGES val:33 [ 33.817348] BUG: Bad rss-counter state mm:00000000247f92ec type:MM_ANONPAGES val:22 [ 34.230576] BUG: Bad rss-counter state mm:00000000913a3325 type:MM_FILEPAGES val:33 [ 34.231391] BUG: Bad rss-counter state mm:00000000913a3325 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:18034' (ECDSA) to the list of known hosts. 2023/06/20 06:15:25 fuzzer started 2023/06/20 06:15:25 dialing manager at localhost:44161 2023/06/20 06:15:25 checking machine... 2023/06/20 06:15:25 checking revisions... [ 34.944239] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:15:25 testing simple program... [ 34.987948] cgroup: Unknown subsys name 'net' [ 35.032057] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:15:24 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=ffff888009a64380 RCX=0000000080000000 RDX=0000000000000000 RSI=ffffffff83ab3fe3 RDI=ffff888016979f34 RBP=0000000000000000 RSP=ffff888016927500 R8 =0000000000000005 R9 =00000000000000ff R10=0000000000000070 R11=00000a7100000a71 R12=0000000000000000 R13=0000000000000070 R14=dffffc0000000000 R15=ffffffff87f94640 RIP=ffffffff814c07f1 RFL=00000293 [--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 00007ffacec3e900 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=00007ffacf1f5618 CR3=000000000e472000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=0000000000000000 RSI=00000000000000e8 RDI=ffffffff84506c5a RBP=ffff8880143e7f58 RSP=ffff8880143e7f20 R8 =0000000000000000 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=00000000000000e8 R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8153443b 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 00007f9551fb1900 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=00007f95514c4028 CR3=000000000955a000 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=eea3dcbb9ddb08b2d84ea71ede603390 XMM02=00000000001200d0ec2efd57dc4c00df XMM03=00000000001266704a04b9547ab6ea9a XMM04=8aae6ca2b6c8acab00000000000ae988 XMM05=7735b7799313f22600000000001368e0 XMM06=4fda316b135da52b0000000000135980 XMM07=e042d86d42eb936e00000000001268f0 XMM08=4a04b9547ab6ea9a0000000000120130 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000