syzkaller login: [ 23.799329] BUG: Bad rss-counter state mm:000000003ab9523e type:MM_FILEPAGES val:33 [ 23.801116] BUG: Bad rss-counter state mm:000000003ab9523e type:MM_ANONPAGES val:22 [ 23.966836] ================================================================== [ 23.967922] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.969188] Read of size 8 at addr ffff88800e6ed6b0 by task sshd/219 [ 23.970120] [ 23.970385] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.971452] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.972608] Call Trace: [ 23.972987] [ 23.973326] dump_stack_lvl+0x91/0xf0 [ 23.973934] print_report+0xcc/0x620 [ 23.974460] ? __virt_addr_valid+0x102/0x340 [ 23.975008] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.975620] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.976242] kasan_report+0xbe/0xf0 [ 23.976716] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.977332] vma_interval_tree_remove+0xc75/0xec0 [ 23.977941] vma_prepare+0xc54/0x11a0 [ 23.978419] __split_vma+0x5af/0x950 [ 23.978887] ? __pfx___split_vma+0x10/0x10 [ 23.979422] ? find_held_lock+0x2c/0x110 [ 23.979975] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.980542] ? lock_is_held_type+0x9f/0x120 [ 23.981079] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.981694] ? mtree_range_walk+0x632/0x900 [ 23.982280] ? mas_walk+0x5c7/0x7c0 [ 23.982774] do_vmi_munmap+0x1f1/0x2b0 [ 23.983287] mmap_region+0x1f9/0x2660 [ 23.983772] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.984303] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.985033] ? __pfx_lock_acquire+0x10/0x10 [ 23.985587] ? __pfx_mmap_region+0x10/0x10 [ 23.986123] ? security_mmap_addr+0x7d/0xa0 [ 23.986665] ? get_unmapped_area+0x1f5/0x3f0 [ 23.987217] do_mmap+0x854/0xf00 [ 23.987661] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.988158] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.988726] ksys_mmap_pgoff+0x3af/0x500 [ 23.989250] do_syscall_64+0x3f/0x90 [ 23.989741] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.990400] RIP: 0033:0x7f9a9c08dd82 [ 23.990870] 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 [ 23.993016] RSP: 002b:00007fff8c45e6d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.993941] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9a9c08dd82 [ 23.994795] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9a9b4c7000 [ 23.995650] RBP: 00007f9a9b4c7000 R08: 0000000000000009 R09: 0000000000001000 [ 23.996496] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558399e26b20 [ 23.997379] R13: 00007fff8c45e6f0 R14: 00007fff8c45e720 R15: 00007fff8c45ea80 [ 23.998258] [ 23.998551] [ 23.998769] Allocated by task 212: [ 23.999196] kasan_save_stack+0x22/0x50 [ 23.999704] kasan_set_track+0x25/0x30 [ 24.000195] __kasan_slab_alloc+0x59/0x70 [ 24.000734] kmem_cache_alloc+0x16b/0x370 [ 24.001260] vm_area_dup+0x20/0x160 [ 24.001720] __split_vma+0x170/0x950 [ 24.002188] split_vma+0xc6/0x110 [ 24.002626] mprotect_fixup+0x8d2/0xb30 [ 24.003133] do_mprotect_pkey+0x87e/0xd40 [ 24.003659] __x64_sys_mprotect+0x78/0xc0 [ 24.004181] do_syscall_64+0x3f/0x90 [ 24.004661] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.005322] [ 24.005559] Freed by task 212: [ 24.005969] kasan_save_stack+0x22/0x50 [ 24.006466] kasan_set_track+0x25/0x30 [ 24.006953] kasan_save_free_info+0x2b/0x50 [ 24.007493] __kasan_slab_free+0x10a/0x190 [ 24.008036] kmem_cache_free+0x10d/0x4d0 [ 24.008567] rcu_core+0x8c8/0x2860 [ 24.009015] __do_softirq+0x1b7/0x7d4 [ 24.009513] [ 24.009731] Last potentially related work creation: [ 24.010309] kasan_save_stack+0x22/0x50 [ 24.010808] __kasan_record_aux_stack+0x8e/0xa0 [ 24.011380] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.012015] remove_vma+0x139/0x170 [ 24.012477] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.013042] do_vmi_munmap+0x1f1/0x2b0 [ 24.013530] __vm_munmap+0x138/0x3a0 [ 24.013994] __x64_sys_munmap+0x59/0x80 [ 24.014485] do_syscall_64+0x3f/0x90 [ 24.014973] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.015628] [ 24.015847] Second to last potentially related work creation: [ 24.016533] kasan_save_stack+0x22/0x50 [ 24.017058] __kasan_record_aux_stack+0x8e/0xa0 [ 24.017657] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.018300] remove_vma+0x139/0x170 [ 24.018754] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.019317] do_vmi_munmap+0x1f1/0x2b0 [ 24.019806] __vm_munmap+0x138/0x3a0 [ 24.020284] elf_map+0x26f/0x310 [ 24.020733] load_elf_binary+0x3417/0x5030 [ 24.021271] bprm_execve+0x803/0x1940 [ 24.021754] do_execveat_common+0x734/0x8e0 [ 24.022286] __x64_sys_execve+0x93/0xc0 [ 24.022780] do_syscall_64+0x3f/0x90 [ 24.023266] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.023918] [ 24.024134] The buggy address belongs to the object at ffff88800e6ed658 [ 24.024134] which belongs to the cache vm_area_struct of size 168 [ 24.025637] The buggy address is located 88 bytes inside of [ 24.025637] freed 168-byte region [ffff88800e6ed658, ffff88800e6ed700) [ 24.027067] [ 24.027284] The buggy address belongs to the physical page: [ 24.027942] page:00000000775542e9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe6ed [ 24.029029] memcg:ffff88800f4d4001 [ 24.029487] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 24.030203] page_type: 0xffffffff() [ 24.030668] raw: 0100000000000200 ffff8880087a0c80 ffffea000036e700 dead000000000005 [ 24.031602] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f4d4001 [ 24.032537] page dumped because: kasan: bad access detected [ 24.033208] [ 24.033432] Memory state around the buggy address: [ 24.034034] ffff88800e6ed580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.034903] ffff88800e6ed600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 24.035779] >ffff88800e6ed680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.036636] ^ [ 24.037238] ffff88800e6ed700: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 [ 24.038108] ffff88800e6ed780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 24.038974] ================================================================== [ 24.040313] Disabling lock debugging due to kernel taint [ 26.459199] BUG: Bad rss-counter state mm:000000002ec678bc type:MM_FILEPAGES val:33 [ 26.460191] BUG: Bad rss-counter state mm:000000002ec678bc type:MM_ANONPAGES val:22 [ 26.943275] BUG: Bad rss-counter state mm:00000000b1d1e880 type:MM_FILEPAGES val:33 [ 26.944481] BUG: Bad rss-counter state mm:00000000b1d1e880 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:36300' (ECDSA) to the list of known hosts. 2023/06/20 15:28:32 fuzzer started 2023/06/20 15:28:33 dialing manager at localhost:36067 2023/06/20 15:28:33 checking machine... 2023/06/20 15:28:33 checking revisions... [ 27.640079] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:28:33 testing simple program... [ 27.682896] cgroup: Unknown subsys name 'net' [ 27.721909] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:28:32 Registers: info registers vcpu 0 RAX=ffff888019f58001 RBX=ffff888019f57410 RCX=0000000000000001 RDX=ffff888019f57f01 RSI=ffff888019f57f38 RDI=ffff888019f57420 RBP=ffff888019f57f38 RSP=ffff888019f57368 R8 =ffffffff863b444c R9 =ffff888019f57450 R10=0000000000038001 R11=000000000008abe0 R12=0000000000000008 R13=ffff888019f50000 R14=ffff888019f57f40 R15=ffff888019f57410 RIP=ffffffff8113048d RFL=00000287 [--S--PC] 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 00007fbdca27c900 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=00007ffe20153000 CR3=000000000feb0000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000006097 RBX=0000000000000002 RCX=ffffffff81132ffd RDX=0000000000000001 RSI=ffffffff86098092 RDI=ffffffff85d92c20 RBP=ffff88806cf09af0 RSP=ffff88806cf099c8 R8 =ffffffff86098092 R9 =0000000000000000 R10=0000000000038001 R11=0000000000006097 R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88806cf09ad9 R15=ffff88806cf09a98 RIP=ffffffff8112fc12 RFL=00000202 [-------] 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 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=00007fe4204113c0 CR3=000000000c52a000 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=2032333a38323a3531203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032333a38323a3531203032 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000