[ 23.978248] BUG: Bad rss-counter state mm:00000000a376a3dd type:MM_FILEPAGES val:33 [ 23.978957] BUG: Bad rss-counter state mm:00000000a376a3dd type:MM_ANONPAGES val:22 [ 24.007411] ================================================================== [ 24.008120] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.008847] Read of size 8 at addr ffff88800e2a3310 by task sshd/219 [ 24.009440] [ 24.009610] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.010270] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.011013] Call Trace: [ 24.011257] [ 24.011474] dump_stack_lvl+0x91/0xf0 [ 24.011964] print_report+0xcc/0x620 [ 24.012357] ? __virt_addr_valid+0x102/0x340 [ 24.012743] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.013105] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.013463] kasan_report+0xbe/0xf0 [ 24.013724] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.014058] vma_interval_tree_remove+0xc75/0xec0 [ 24.014400] vma_prepare+0xc54/0x11a0 [ 24.014661] __split_vma+0x5af/0x950 [ 24.014917] ? __pfx___split_vma+0x10/0x10 [ 24.015206] ? find_held_lock+0x2c/0x110 [ 24.015488] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.015803] ? lock_is_held_type+0x9f/0x120 [ 24.016098] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.016424] ? mtree_range_walk+0x632/0x900 [ 24.016760] ? mas_walk+0x5c7/0x7c0 [ 24.017039] do_vmi_munmap+0x1f1/0x2b0 [ 24.017333] mmap_region+0x1f9/0x2660 [ 24.017605] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.017892] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.018281] ? __pfx_lock_acquire+0x10/0x10 [ 24.018572] ? __pfx_mmap_region+0x10/0x10 [ 24.018857] ? security_mmap_addr+0x7d/0xa0 [ 24.019160] ? get_unmapped_area+0x1f5/0x3f0 [ 24.019475] do_mmap+0x854/0xf00 [ 24.019761] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.020053] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.020392] ksys_mmap_pgoff+0x3af/0x500 [ 24.020687] do_syscall_64+0x3f/0x90 [ 24.020972] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.021363] RIP: 0033:0x7f3c53b31d82 [ 24.021631] 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 [ 24.022891] RSP: 002b:00007ffd3ebadb58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.023432] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3c53b31d82 [ 24.023952] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3c52f6b000 [ 24.024456] RBP: 00007f3c52f6b000 R08: 0000000000000009 R09: 0000000000001000 [ 24.024961] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a5dd806b20 [ 24.025429] R13: 00007ffd3ebadb70 R14: 00007ffd3ebadba0 R15: 00007ffd3ebadf00 [ 24.025906] [ 24.026064] [ 24.026181] Allocated by task 212: [ 24.026416] kasan_save_stack+0x22/0x50 [ 24.026714] kasan_set_track+0x25/0x30 [ 24.027007] __kasan_slab_alloc+0x59/0x70 [ 24.027309] kmem_cache_alloc+0x16b/0x370 [ 24.027632] vm_area_dup+0x20/0x160 [ 24.027903] __split_vma+0x170/0x950 [ 24.028180] split_vma+0xc6/0x110 [ 24.028433] mprotect_fixup+0x8d2/0xb30 [ 24.028727] do_mprotect_pkey+0x87e/0xd40 [ 24.029034] __x64_sys_mprotect+0x78/0xc0 [ 24.029343] do_syscall_64+0x3f/0x90 [ 24.029627] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.030014] [ 24.030141] Freed by task 212: [ 24.030372] kasan_save_stack+0x22/0x50 [ 24.030682] kasan_set_track+0x25/0x30 [ 24.030965] kasan_save_free_info+0x2b/0x50 [ 24.031278] __kasan_slab_free+0x10a/0x190 [ 24.031614] kmem_cache_free+0x10d/0x4d0 [ 24.031900] rcu_core+0x8c8/0x2860 [ 24.032144] __do_softirq+0x1b7/0x7d4 [ 24.032405] [ 24.032526] Last potentially related work creation: [ 24.032843] kasan_save_stack+0x22/0x50 [ 24.033115] __kasan_record_aux_stack+0x8e/0xa0 [ 24.033425] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.033774] remove_vma+0x139/0x170 [ 24.034018] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.034320] do_vmi_munmap+0x1f1/0x2b0 [ 24.034584] __vm_munmap+0x138/0x3a0 [ 24.034840] __x64_sys_munmap+0x59/0x80 [ 24.035109] do_syscall_64+0x3f/0x90 [ 24.035365] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.035727] [ 24.035844] The buggy address belongs to the object at ffff88800e2a32b8 [ 24.035844] which belongs to the cache vm_area_struct of size 168 [ 24.036680] The buggy address is located 88 bytes inside of [ 24.036680] freed 168-byte region [ffff88800e2a32b8, ffff88800e2a3360) [ 24.037508] [ 24.037618] The buggy address belongs to the physical page: [ 24.037947] page:00000000b8619533 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe2a3 [ 24.038485] memcg:ffff888010301801 [ 24.038699] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 24.039048] page_type: 0xffffffff() [ 24.039274] raw: 0100000000000200 ffff8880087a0c80 ffffea00006751c0 0000000000000007 [ 24.039813] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888010301801 [ 24.040348] page dumped because: kasan: bad access detected [ 24.040755] [ 24.040872] Memory state around the buggy address: [ 24.041184] ffff88800e2a3200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 24.041649] ffff88800e2a3280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 24.042117] >ffff88800e2a3300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 24.042587] ^ [ 24.042839] ffff88800e2a3380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.043303] ffff88800e2a3400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 24.043774] ================================================================== [ 24.044298] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 25.955783] BUG: Bad rss-counter state mm:0000000042cad0dd type:MM_FILEPAGES val:33 [ 25.957009] BUG: Bad rss-counter state mm:0000000042cad0dd type:MM_ANONPAGES val:22 [ 26.507633] BUG: Bad rss-counter state mm:0000000066e18673 type:MM_FILEPAGES val:33 [ 26.508623] BUG: Bad rss-counter state mm:0000000066e18673 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:12933' (ECDSA) to the list of known hosts. 2023/06/20 18:48:30 fuzzer started 2023/06/20 18:48:30 dialing manager at localhost:36067 2023/06/20 18:48:30 checking machine... 2023/06/20 18:48:30 checking revisions... [ 27.160551] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:48:31 testing simple program... [ 27.197385] cgroup: Unknown subsys name 'net' [ 27.240785] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:48:30 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff8880102cf960 RCX=0000000000000001 RDX=1ffff11002059f41 RSI=ffffffff83c1c8d7 RDI=ffff8880102cf96c RBP=ffff8880102cfa08 RSP=ffff8880102cf878 R8 =0000000000000001 R9 =ffff8880102cf8d8 R10=0000000000038001 R11=000000000009a973 R12=ffff8880102cf960 R13=0000000000000000 R14=ffff88801827d1c0 R15=0000000000000cc0 RIP=ffffffff813ad547 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 00007f486e72d900 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=00007f486ece2650 CR3=000000001a24e000 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=0005fe9418ec4884 RCX=0000000000000000 RDX=00007ffcea5cf318 RSI=0000000000000000 RDI=0000564d1d26c360 RBP=00007ffcea5cf330 RSP=00007ffcea5cf300 R8 =0000000000000000 R9 =00007ffcea5e8080 R10=00007ffcea5e8080 R11=000000000000c698 R12=00007ffcea5cf320 R13=00007ffcea5cf318 R14=0000000000000000 R15=0000000000000000 RIP=00007fce160ba0b1 RFL=00000246 [---Z-P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fce15548900 00000000 00000000 GS =0000 0000000000000000 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=00007fce1493b750 CR3=000000000d8d8000 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=000000000010ac382fccd54c36d8a3f3 XMM01=a7acd700afb2cbbdc4488b733a03f3ce XMM02=000000000011d318eff9b2d0a8fce9cb XMM03=000000000011d3e82c67c8bc2e329bc3 XMM04=7b4261e7f97b701600000000000ae988 XMM05=dfcdbad4f1609c370000000000130b98 XMM06=806171799158d9670000000000130a20 XMM07=e042d86d42eb936e0000000000121248 XMM08=86399fd1b71a02b9000000000011d3e8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000