syzkaller login: [ 38.801333] BUG: Bad rss-counter state mm:00000000a75ba787 type:MM_FILEPAGES val:33 [ 38.802875] BUG: Bad rss-counter state mm:00000000a75ba787 type:MM_ANONPAGES val:22 [ 38.974955] ================================================================== [ 38.975971] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.977024] Read of size 8 at addr ffff8880160e9d08 by task sshd/219 [ 38.977971] [ 38.978214] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.979165] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.980259] Call Trace: [ 38.980643] [ 38.980962] dump_stack_lvl+0x91/0xf0 [ 38.981514] print_report+0xcc/0x620 [ 38.982055] ? __virt_addr_valid+0x102/0x340 [ 38.982676] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.983359] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.984040] kasan_report+0xbe/0xf0 [ 38.984604] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.985371] vma_interval_tree_remove+0xc75/0xec0 [ 38.986115] vma_prepare+0xc54/0x11a0 [ 38.986710] __split_vma+0x5af/0x950 [ 38.987279] ? __pfx___split_vma+0x10/0x10 [ 38.987922] ? find_held_lock+0x2c/0x110 [ 38.988535] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.989218] ? lock_is_held_type+0x9f/0x120 [ 38.989851] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.990588] ? mtree_range_walk+0x632/0x900 [ 38.991273] ? mas_walk+0x5c7/0x7c0 [ 38.991839] do_vmi_munmap+0x1f1/0x2b0 [ 38.992430] mmap_region+0x1f9/0x2660 [ 38.993031] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.993669] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.994518] ? __pfx_lock_acquire+0x10/0x10 [ 38.995164] ? __pfx_mmap_region+0x10/0x10 [ 38.995784] ? security_mmap_addr+0x7d/0xa0 [ 38.996438] ? get_unmapped_area+0x1f5/0x3f0 [ 38.997109] do_mmap+0x854/0xf00 [ 38.997643] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.998239] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.998897] ksys_mmap_pgoff+0x3af/0x500 [ 38.999515] do_syscall_64+0x3f/0x90 [ 39.000096] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.000888] RIP: 0033:0x7f08d608bd82 [ 39.001455] 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 [ 39.004079] RSP: 002b:00007ffc1c4d92d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.005194] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f08d608bd82 [ 39.006205] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f08d54c5000 [ 39.007231] RBP: 00007f08d54c5000 R08: 0000000000000009 R09: 0000000000001000 [ 39.008273] R10: 0000000000000812 R11: 0000000000000206 R12: 00005646fd047ec0 [ 39.009332] R13: 00007ffc1c4d92f0 R14: 00007ffc1c4d9320 R15: 00007ffc1c4d9680 [ 39.010396] [ 39.010756] [ 39.011011] Allocated by task 212: [ 39.011547] kasan_save_stack+0x22/0x50 [ 39.012175] kasan_set_track+0x25/0x30 [ 39.012795] __kasan_slab_alloc+0x59/0x70 [ 39.013440] kmem_cache_alloc+0x16b/0x370 [ 39.014059] vm_area_dup+0x20/0x160 [ 39.014609] __split_vma+0x170/0x950 [ 39.015171] split_vma+0xc6/0x110 [ 39.015697] mprotect_fixup+0x8d2/0xb30 [ 39.016316] do_mprotect_pkey+0x87e/0xd40 [ 39.016950] __x64_sys_mprotect+0x78/0xc0 [ 39.017581] do_syscall_64+0x3f/0x90 [ 39.018152] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.018931] [ 39.019186] Freed by task 212: [ 39.019659] kasan_save_stack+0x22/0x50 [ 39.020260] kasan_set_track+0x25/0x30 [ 39.020850] kasan_save_free_info+0x2b/0x50 [ 39.021492] __kasan_slab_free+0x10a/0x190 [ 39.022136] kmem_cache_free+0x10d/0x4d0 [ 39.022748] rcu_core+0x8c8/0x2860 [ 39.023280] __do_softirq+0x1b7/0x7d4 [ 39.023852] [ 39.024105] Last potentially related work creation: [ 39.024835] kasan_save_stack+0x22/0x50 [ 39.025429] __kasan_record_aux_stack+0x8e/0xa0 [ 39.026030] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.026702] remove_vma+0x139/0x170 [ 39.027178] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.027760] do_vmi_munmap+0x1f1/0x2b0 [ 39.028274] __vm_munmap+0x138/0x3a0 [ 39.028767] __x64_sys_munmap+0x59/0x80 [ 39.029292] do_syscall_64+0x3f/0x90 [ 39.029788] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.030469] [ 39.030695] The buggy address belongs to the object at ffff8880160e9cb0 [ 39.030695] which belongs to the cache vm_area_struct of size 168 [ 39.032242] The buggy address is located 88 bytes inside of [ 39.032242] freed 168-byte region [ffff8880160e9cb0, ffff8880160e9d58) [ 39.033738] [ 39.033965] The buggy address belongs to the physical page: [ 39.034666] page:00000000bf5aed90 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x160e9 [ 39.035825] memcg:ffff888015dbe501 [ 39.036280] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.036977] page_type: 0xffffffff() [ 39.037450] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 39.038423] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015dbe501 [ 39.039382] page dumped because: kasan: bad access detected [ 39.040085] [ 39.040310] Memory state around the buggy address: [ 39.040925] ffff8880160e9c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 39.041829] ffff8880160e9c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 39.042738] >ffff8880160e9d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 39.043638] ^ [ 39.044091] ffff8880160e9d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 39.045007] ffff8880160e9e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 39.045896] ================================================================== [ 39.047012] Disabling lock debugging due to kernel taint [ 40.591717] BUG: Bad rss-counter state mm:00000000ee1c3d5a type:MM_FILEPAGES val:33 [ 40.592719] BUG: Bad rss-counter state mm:00000000ee1c3d5a type:MM_ANONPAGES val:22 [ 41.059826] BUG: Bad rss-counter state mm:00000000f04f04d5 type:MM_FILEPAGES val:33 [ 41.060899] BUG: Bad rss-counter state mm:00000000f04f04d5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:63589' (ECDSA) to the list of known hosts. 2023/06/20 17:56:17 fuzzer started 2023/06/20 17:56:17 dialing manager at localhost:36067 2023/06/20 17:56:17 checking machine... 2023/06/20 17:56:17 checking revisions... [ 41.809772] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:56:17 testing simple program... [ 41.861059] cgroup: Unknown subsys name 'net' [ 41.907611] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:56:17 Registers: info registers vcpu 0 RAX=00007fe9a306f060 RBX=0000000000000400 RCX=0000000000000000 RDX=000055befd4b9770 RSI=00007fe9a24bf770 RDI=00007fe9a24bf770 RBP=0000000000000400 RSP=00007fffcf8450e8 R8 =00007fffcf845188 R9 =00007fe9a2a7fbe0 R10=000000000000006e R11=0000000000000000 R12=000055befd4b9740 R13=000055befd4a8ce0 R14=000055befd4b9770 R15=00007fe9a24cd6f8 RIP=00007fe9a29f8672 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 00007fe9a24cd900 00000000 00000000 GS =0000 0000000000000000 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=00007fe9a2a850b0 CR3=000000000f906000 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007fff3e3aa628 CR3=0000000009aa0000 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=2037313a36353a3731203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036313a36353a3731203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000