[ 23.791120] BUG: Bad rss-counter state mm:00000000922cf4ab type:MM_FILEPAGES val:31 [ 23.791724] BUG: Bad rss-counter state mm:00000000922cf4ab type:MM_ANONPAGES val:22 [ 23.967397] ================================================================== [ 23.968422] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.969470] Read of size 8 at addr ffff88800e269058 by task sshd/220 [ 23.970423] [ 23.970674] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 23.971638] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.972749] Call Trace: [ 23.973106] [ 23.973421] dump_stack_lvl+0x91/0xf0 [ 23.973970] print_report+0xcc/0x620 [ 23.974517] ? __virt_addr_valid+0x102/0x340 [ 23.975136] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.975824] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.976511] kasan_report+0xbe/0xf0 [ 23.977039] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.977723] vma_interval_tree_remove+0xc75/0xec0 [ 23.978389] vma_prepare+0xc54/0x11a0 [ 23.978934] __split_vma+0x5af/0x950 [ 23.979460] ? __pfx___split_vma+0x10/0x10 [ 23.980042] ? find_held_lock+0x2c/0x110 [ 23.980621] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.981245] ? lock_is_held_type+0x9f/0x120 [ 23.981846] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.982549] ? mtree_range_walk+0x632/0x900 [ 23.983165] ? mas_walk+0x5c7/0x7c0 [ 23.983691] do_vmi_munmap+0x1f1/0x2b0 [ 23.984244] mmap_region+0x1f9/0x2660 [ 23.984782] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.985349] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.986146] ? __pfx_lock_acquire+0x10/0x10 [ 23.986758] ? __pfx_mmap_region+0x10/0x10 [ 23.987345] ? security_mmap_addr+0x7d/0xa0 [ 23.987943] ? get_unmapped_area+0x1f5/0x3f0 [ 23.988552] do_mmap+0x854/0xf00 [ 23.989042] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.989595] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.990219] ksys_mmap_pgoff+0x3af/0x500 [ 23.990805] do_syscall_64+0x3f/0x90 [ 23.991340] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.992074] RIP: 0033:0x7f418c890d82 [ 23.992586] 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 [ 23.994977] RSP: 002b:00007ffd53d8e0e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.995981] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f418c890d82 [ 23.996918] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f418bcca000 [ 23.997849] RBP: 00007f418bcca000 R08: 0000000000000009 R09: 0000000000001000 [ 23.998801] R10: 0000000000000812 R11: 0000000000000206 R12: 00005651b24f0ec0 [ 23.999734] R13: 00007ffd53d8e100 R14: 00007ffd53d8e130 R15: 00007ffd53d8e490 [ 24.000679] [ 24.001004] [ 24.001243] Allocated by task 211: [ 24.001719] kasan_save_stack+0x22/0x50 [ 24.002276] kasan_set_track+0x25/0x30 [ 24.002846] __kasan_slab_alloc+0x59/0x70 [ 24.003436] kmem_cache_alloc+0x16b/0x370 [ 24.004014] vm_area_dup+0x20/0x160 [ 24.004516] __split_vma+0x170/0x950 [ 24.005030] split_vma+0xc6/0x110 [ 24.005521] mprotect_fixup+0x8d2/0xb30 [ 24.006089] do_mprotect_pkey+0x87e/0xd40 [ 24.006685] __x64_sys_mprotect+0x78/0xc0 [ 24.007267] do_syscall_64+0x3f/0x90 [ 24.007796] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.008514] [ 24.008759] Freed by task 211: [ 24.009199] kasan_save_stack+0x22/0x50 [ 24.009755] kasan_set_track+0x25/0x30 [ 24.010303] kasan_save_free_info+0x2b/0x50 [ 24.010916] __kasan_slab_free+0x10a/0x190 [ 24.011512] kmem_cache_free+0x10d/0x4d0 [ 24.012078] rcu_core+0x8c8/0x2860 [ 24.012574] __do_softirq+0x1b7/0x7d4 [ 24.013110] [ 24.013351] Last potentially related work creation: [ 24.014005] kasan_save_stack+0x22/0x50 [ 24.014580] __kasan_record_aux_stack+0x8e/0xa0 [ 24.015216] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.015933] remove_vma+0x139/0x170 [ 24.016437] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.017055] do_vmi_munmap+0x1f1/0x2b0 [ 24.017591] __vm_munmap+0x138/0x3a0 [ 24.018113] __x64_sys_munmap+0x59/0x80 [ 24.018674] do_syscall_64+0x3f/0x90 [ 24.019195] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.019902] [ 24.020140] Second to last potentially related work creation: [ 24.020895] kasan_save_stack+0x22/0x50 [ 24.021455] __kasan_record_aux_stack+0x8e/0xa0 [ 24.022089] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.022818] remove_vma+0x139/0x170 [ 24.023315] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.023934] do_vmi_munmap+0x1f1/0x2b0 [ 24.024478] mmap_region+0x1f9/0x2660 [ 24.025016] do_mmap+0x854/0xf00 [ 24.025498] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.026038] ksys_mmap_pgoff+0x3af/0x500 [ 24.026604] do_syscall_64+0x3f/0x90 [ 24.027129] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.027845] [ 24.028086] The buggy address belongs to the object at ffff88800e269000 [ 24.028086] which belongs to the cache vm_area_struct of size 168 [ 24.029740] The buggy address is located 88 bytes inside of [ 24.029740] freed 168-byte region [ffff88800e269000, ffff88800e2690a8) [ 24.031311] [ 24.031551] The buggy address belongs to the physical page: [ 24.032293] page:00000000b165a09e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe269 [ 24.033512] memcg:ffff88800e11a901 [ 24.033990] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 24.034793] page_type: 0xffffffff() [ 24.035298] raw: 0100000000000200 ffff88800879fc80 ffffea0000398980 dead000000000003 [ 24.036330] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e11a901 [ 24.037349] page dumped because: kasan: bad access detected [ 24.038086] [ 24.038326] Memory state around the buggy address: [ 24.038986] ffff88800e268f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 24.039949] ffff88800e268f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 24.040908] >ffff88800e269000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.041865] ^ [ 24.042698] ffff88800e269080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 24.043669] ffff88800e269100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.044627] ================================================================== [ 24.045797] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.062652] BUG: Bad rss-counter state mm:000000001a757257 type:MM_FILEPAGES val:33 [ 26.063829] BUG: Bad rss-counter state mm:000000001a757257 type:MM_ANONPAGES val:22 [ 26.602728] BUG: Bad rss-counter state mm:00000000767e9452 type:MM_FILEPAGES val:33 [ 26.604138] BUG: Bad rss-counter state mm:00000000767e9452 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:42343' (ECDSA) to the list of known hosts. 2023/06/19 19:56:05 fuzzer started 2023/06/19 19:56:05 dialing manager at localhost:44161 2023/06/19 19:56:05 checking machine... 2023/06/19 19:56:05 checking revisions... [ 27.267408] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:56:06 testing simple program... [ 27.317615] cgroup: Unknown subsys name 'net' [ 27.370071] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:56:05 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=ffff888013fc02b0 RCX=0000000000000000 RDX=ffff8880165fd1c0 RSI=ffffffff813c896c RDI=ffff8880142af9b0 RBP=ffff8880142afa18 RSP=ffff8880142af938 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffff8880142af9b0 R13=ffffed1002855f37 R14=ffffed1002855f36 R15=ffff8880142af9b8 RIP=ffffffff814c0800 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f126ffbc900 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=00007f126f413cf0 CR3=000000000e0da000 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=656e6e6f637369443d4547415353454d XMM01=2e303120746f6f722072657375206d6f XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=daf5f66eb0beed6100000000000ae988 XMM05=e1fe2046401adea90000000000135bb8 XMM06=2e2193258050fb8700000000001348f0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000018 RBX=0000000000000010 RCX=0000000000000000 RDX=0000000000000000 RSI=ffff888016e8fbf8 RDI=ffff88800b90e008 RBP=ffff88800b90e000 RSP=ffff888016e8fa80 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000010 R11=0000000000000000 R12=ffff888008e1c0d8 R13=0000000000000000 R14=ffff888016e8fbd8 R15=dffffc0000000000 RIP=ffffffff81f4cc36 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 00007f943e2e4900 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=00007f943e899650 CR3=000000000e1ba000 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=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