syzkaller login: [ 28.833087] BUG: Bad rss-counter state mm:00000000e24463f8 type:MM_FILEPAGES val:33 [ 28.834523] BUG: Bad rss-counter state mm:00000000e24463f8 type:MM_ANONPAGES val:22 [ 29.032351] ================================================================== [ 29.033490] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.034661] Read of size 8 at addr ffff88800dcbb6b0 by task sshd/221 [ 29.035509] [ 29.035738] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 29.036661] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.037694] Call Trace: [ 29.038033] [ 29.038338] dump_stack_lvl+0x91/0xf0 [ 29.038862] print_report+0xcc/0x620 [ 29.039374] ? __virt_addr_valid+0x102/0x340 [ 29.039963] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.040630] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.041287] kasan_report+0xbe/0xf0 [ 29.041791] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.042449] vma_interval_tree_remove+0xc75/0xec0 [ 29.043088] vma_prepare+0xc54/0x11a0 [ 29.043594] __split_vma+0x5af/0x950 [ 29.044117] ? __pfx___split_vma+0x10/0x10 [ 29.044680] ? find_held_lock+0x2c/0x110 [ 29.045239] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.045830] ? lock_is_held_type+0x9f/0x120 [ 29.046410] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.047058] ? mtree_range_walk+0x632/0x900 [ 29.047645] ? mas_walk+0x5c7/0x7c0 [ 29.048161] do_vmi_munmap+0x1f1/0x2b0 [ 29.048677] mmap_region+0x1f9/0x2660 [ 29.049190] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.049732] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.050497] ? __pfx_lock_acquire+0x10/0x10 [ 29.051059] ? __pfx_mmap_region+0x10/0x10 [ 29.051627] ? security_mmap_addr+0x7d/0xa0 [ 29.052212] ? get_unmapped_area+0x1f5/0x3f0 [ 29.052800] do_mmap+0x854/0xf00 [ 29.053266] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.053792] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.054391] ksys_mmap_pgoff+0x3af/0x500 [ 29.054930] do_syscall_64+0x3f/0x90 [ 29.055441] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.056134] RIP: 0033:0x7f676a57cd82 [ 29.056619] 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 [ 29.058899] RSP: 002b:00007ffdea17fcd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.059854] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f676a57cd82 [ 29.060764] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f67699b6000 [ 29.061666] RBP: 00007f67699b6000 R08: 0000000000000009 R09: 0000000000001000 [ 29.062561] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a242e44f70 [ 29.063464] R13: 00007ffdea17fcf0 R14: 00007ffdea17fd20 R15: 00007ffdea180080 [ 29.064391] [ 29.064700] [ 29.064928] Allocated by task 212: [ 29.065387] kasan_save_stack+0x22/0x50 [ 29.065918] kasan_set_track+0x25/0x30 [ 29.066438] __kasan_slab_alloc+0x59/0x70 [ 29.066992] kmem_cache_alloc+0x16b/0x370 [ 29.067536] vm_area_dup+0x20/0x160 [ 29.068020] __split_vma+0x170/0x950 [ 29.068526] split_vma+0xc6/0x110 [ 29.068998] mprotect_fixup+0x8d2/0xb30 [ 29.069529] do_mprotect_pkey+0x87e/0xd40 [ 29.070088] __x64_sys_mprotect+0x78/0xc0 [ 29.070657] do_syscall_64+0x3f/0x90 [ 29.071176] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.071885] [ 29.072124] Freed by task 212: [ 29.072551] kasan_save_stack+0x22/0x50 [ 29.073102] kasan_set_track+0x25/0x30 [ 29.073637] kasan_save_free_info+0x2b/0x50 [ 29.074216] __kasan_slab_free+0x10a/0x190 [ 29.074797] kmem_cache_free+0x10d/0x4d0 [ 29.075355] rcu_core+0x8c8/0x2860 [ 29.075842] __do_softirq+0x1b7/0x7d4 [ 29.076391] [ 29.076625] Last potentially related work creation: [ 29.077262] kasan_save_stack+0x22/0x50 [ 29.077821] __kasan_record_aux_stack+0x8e/0xa0 [ 29.078468] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.079180] remove_vma+0x139/0x170 [ 29.079676] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.080300] do_vmi_munmap+0x1f1/0x2b0 [ 29.080834] __vm_munmap+0x138/0x3a0 [ 29.081345] __x64_sys_munmap+0x59/0x80 [ 29.081889] do_syscall_64+0x3f/0x90 [ 29.082410] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.083120] [ 29.083355] Second to last potentially related work creation: [ 29.084127] kasan_save_stack+0x22/0x50 [ 29.084675] __kasan_record_aux_stack+0x8e/0xa0 [ 29.085303] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.086013] remove_vma+0x139/0x170 [ 29.086507] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.087119] do_vmi_munmap+0x1f1/0x2b0 [ 29.087650] mmap_region+0x1f9/0x2660 [ 29.088187] do_mmap+0x854/0xf00 [ 29.088659] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.089194] ksys_mmap_pgoff+0x3af/0x500 [ 29.089741] do_syscall_64+0x3f/0x90 [ 29.090261] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.090971] [ 29.091203] The buggy address belongs to the object at ffff88800dcbb658 [ 29.091203] which belongs to the cache vm_area_struct of size 168 [ 29.092831] The buggy address is located 88 bytes inside of [ 29.092831] freed 168-byte region [ffff88800dcbb658, ffff88800dcbb700) [ 29.094370] [ 29.094608] The buggy address belongs to the physical page: [ 29.095331] page:00000000ad6a3969 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdcbb [ 29.096528] memcg:ffff88800e395d01 [ 29.097002] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 29.097770] page_type: 0xffffffff() [ 29.098265] raw: 0100000000000200 ffff8880087a0c80 ffffea0000334ec0 dead000000000003 [ 29.099284] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e395d01 [ 29.100285] page dumped because: kasan: bad access detected [ 29.101012] [ 29.101247] Memory state around the buggy address: [ 29.101880] ffff88800dcbb580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 29.102817] ffff88800dcbb600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 29.103760] >ffff88800dcbb680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.104704] ^ [ 29.105338] ffff88800dcbb700: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 [ 29.106276] ffff88800dcbb780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 29.107211] ================================================================== [ 29.108366] Disabling lock debugging due to kernel taint [ 31.081254] BUG: Bad rss-counter state mm:000000003fa3c8aa type:MM_FILEPAGES val:33 [ 31.082415] BUG: Bad rss-counter state mm:000000003fa3c8aa type:MM_ANONPAGES val:22 [ 31.533744] BUG: Bad rss-counter state mm:0000000063e20042 type:MM_FILEPAGES val:33 [ 31.534909] BUG: Bad rss-counter state mm:0000000063e20042 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:56334' (ECDSA) to the list of known hosts. 2023/06/20 18:39:55 fuzzer started 2023/06/20 18:39:55 dialing manager at localhost:36067 2023/06/20 18:39:55 checking machine... 2023/06/20 18:39:55 checking revisions... [ 32.153168] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:39:55 testing simple program... [ 32.195298] cgroup: Unknown subsys name 'net' [ 32.235474] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:39:55 Registers: info registers vcpu 0 RAX=ffffffff83639b72 RBX=ffffffff85fa4d58 RCX=ffffffff83639d65 RDX=0000000000000000 RSI=ffffffff863b3266 RDI=ffffffff85fa4d58 RBP=ffffffff85fa4d5c RSP=ffff888016fc78a0 R8 =ffffffff863b3266 R9 =ffff888016fc7998 R10=0000000000038001 R11=000000000008a8e5 R12=ffffffff85fa4d58 R13=ffffffff85fa4d58 R14=ffffffff85fa4d58 R15=dffffc0000000000 RIP=ffffffff8112fc4f RFL=00000206 [-----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 00007f8b42998900 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=00007f8b42f4d650 CR3=000000000ca2c000 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=0000000000000001 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=0000561c6a72e290 CR3=000000001a138000 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=2035353a39333a3831203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035353a39333a3831203032 XMM08=7020303d64696720303d64697520612f XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000