syzkaller login: [ 31.784476] BUG: Bad rss-counter state mm:000000009b5d7662 type:MM_FILEPAGES val:33 [ 31.785963] BUG: Bad rss-counter state mm:000000009b5d7662 type:MM_ANONPAGES val:22 [ 31.952713] ================================================================== [ 31.953654] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.954586] Read of size 8 at addr ffff888019d90d08 by task sshd/221 [ 31.955366] [ 31.955589] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.956553] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.957535] Call Trace: [ 31.957854] [ 31.958150] dump_stack_lvl+0x91/0xf0 [ 31.958646] print_report+0xcc/0x620 [ 31.959136] ? __virt_addr_valid+0x102/0x340 [ 31.959690] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.960315] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.960933] kasan_report+0xbe/0xf0 [ 31.961409] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.962042] vma_interval_tree_remove+0xc75/0xec0 [ 31.962648] vma_prepare+0xc54/0x11a0 [ 31.963125] __split_vma+0x5af/0x950 [ 31.963607] ? __pfx___split_vma+0x10/0x10 [ 31.964135] ? find_held_lock+0x2c/0x110 [ 31.964655] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.965216] ? lock_is_held_type+0x9f/0x120 [ 31.965784] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.966389] ? mtree_range_walk+0x632/0x900 [ 31.966943] ? mas_walk+0x5c7/0x7c0 [ 31.967417] do_vmi_munmap+0x1f1/0x2b0 [ 31.967910] mmap_region+0x1f9/0x2660 [ 31.968397] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.968914] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.969640] ? __pfx_lock_acquire+0x10/0x10 [ 31.970173] ? __pfx_mmap_region+0x10/0x10 [ 31.970704] ? security_mmap_addr+0x7d/0xa0 [ 31.971234] ? get_unmapped_area+0x1f5/0x3f0 [ 31.971786] do_mmap+0x854/0xf00 [ 31.972228] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.972725] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.973293] ksys_mmap_pgoff+0x3af/0x500 [ 31.973812] do_syscall_64+0x3f/0x90 [ 31.974289] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.974943] RIP: 0033:0x7f1993ce9d82 [ 31.975405] 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 [ 31.977565] RSP: 002b:00007ffc1a927da8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.978472] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1993ce9d82 [ 31.979323] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1993123000 [ 31.980172] RBP: 00007f1993123000 R08: 0000000000000009 R09: 0000000000001000 [ 31.981014] R10: 0000000000000812 R11: 0000000000000206 R12: 00005625d61d5980 [ 31.981873] R13: 00007ffc1a927dc0 R14: 00007ffc1a927df0 R15: 00007ffc1a928150 [ 31.982733] [ 31.983022] [ 31.983238] Allocated by task 214: [ 31.983667] kasan_save_stack+0x22/0x50 [ 31.984174] kasan_set_track+0x25/0x30 [ 31.984675] __kasan_slab_alloc+0x59/0x70 [ 31.985205] kmem_cache_alloc+0x16b/0x370 [ 31.985728] vm_area_dup+0x20/0x160 [ 31.986185] __split_vma+0x170/0x950 [ 31.986655] split_vma+0xc6/0x110 [ 31.987092] mprotect_fixup+0x8d2/0xb30 [ 31.987598] do_mprotect_pkey+0x87e/0xd40 [ 31.988124] __x64_sys_mprotect+0x78/0xc0 [ 31.988643] do_syscall_64+0x3f/0x90 [ 31.989120] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.989781] [ 31.989998] Freed by task 204: [ 31.990386] kasan_save_stack+0x22/0x50 [ 31.990899] kasan_set_track+0x25/0x30 [ 31.991395] kasan_save_free_info+0x2b/0x50 [ 31.991923] __kasan_slab_free+0x10a/0x190 [ 31.992458] kmem_cache_free+0x10d/0x4d0 [ 31.992969] rcu_core+0x8c8/0x2860 [ 31.993416] __do_softirq+0x1b7/0x7d4 [ 31.993904] [ 31.994121] Last potentially related work creation: [ 31.994714] kasan_save_stack+0x22/0x50 [ 31.995217] __kasan_record_aux_stack+0x8e/0xa0 [ 31.995793] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.996435] remove_vma+0x139/0x170 [ 31.996918] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.997530] do_vmi_munmap+0x1f1/0x2b0 [ 31.998035] __vm_munmap+0x138/0x3a0 [ 31.998518] __x64_sys_munmap+0x59/0x80 [ 31.999030] do_syscall_64+0x3f/0x90 [ 31.999515] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.000164] [ 32.000389] Second to last potentially related work creation: [ 32.001094] kasan_save_stack+0x22/0x50 [ 32.001614] __kasan_record_aux_stack+0x8e/0xa0 [ 32.002192] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.002833] remove_vma+0x139/0x170 [ 32.003292] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.003865] do_vmi_munmap+0x1f1/0x2b0 [ 32.004352] mmap_region+0x1f9/0x2660 [ 32.004842] do_mmap+0x854/0xf00 [ 32.005279] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.005793] ksys_mmap_pgoff+0x3af/0x500 [ 32.006301] do_syscall_64+0x3f/0x90 [ 32.006782] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.007431] [ 32.007648] The buggy address belongs to the object at ffff888019d90cb0 [ 32.007648] which belongs to the cache vm_area_struct of size 168 [ 32.009128] The buggy address is located 88 bytes inside of [ 32.009128] freed 168-byte region [ffff888019d90cb0, ffff888019d90d58) [ 32.010534] [ 32.010758] The buggy address belongs to the physical page: [ 32.011416] page:0000000008c82bd1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19d90 [ 32.012503] memcg:ffff888014477601 [ 32.012938] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 32.013639] page_type: 0xffffffff() [ 32.014091] raw: 0100000000000200 ffff8880087a0c80 ffffea00003fbac0 0000000000000007 [ 32.015000] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888014477601 [ 32.015903] page dumped because: kasan: bad access detected [ 32.016569] [ 32.016790] Memory state around the buggy address: [ 32.017379] ffff888019d90c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 32.018248] ffff888019d90c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 32.019124] >ffff888019d90d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 32.019979] ^ [ 32.020431] ffff888019d90d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 32.021311] ffff888019d90e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 32.022173] ================================================================== [ 32.023287] Disabling lock debugging due to kernel taint [ 34.273270] BUG: Bad rss-counter state mm:00000000f9804a1e type:MM_FILEPAGES val:33 [ 34.274386] BUG: Bad rss-counter state mm:00000000f9804a1e type:MM_ANONPAGES val:22 [ 34.735899] BUG: Bad rss-counter state mm:00000000ed62d08f type:MM_FILEPAGES val:33 [ 34.737117] BUG: Bad rss-counter state mm:00000000ed62d08f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:2494' (ECDSA) to the list of known hosts. 2023/06/20 17:45:15 fuzzer started 2023/06/20 17:45:15 dialing manager at localhost:36067 2023/06/20 17:45:15 checking machine... 2023/06/20 17:45:15 checking revisions... [ 35.422160] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:45:16 testing simple program... [ 35.471223] cgroup: Unknown subsys name 'net' [ 35.514626] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:45:15 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffed1002cb9f5d RCX=0000000000000000 RDX=ffff88801656d1c0 RSI=ffff8880165cfb08 RDI=ffffffff813ad470 RBP=ffff8880165cfad8 RSP=ffff8880165cfad0 R8 =0000000000000001 R9 =ffff888019c66a5c R10=ffff888019c66a13 R11=00000000000b6a61 R12=ffff88800ec38500 R13=0000000000000000 R14=ffff888019c669c8 R15=ffff888019c66980 RIP=ffffffff810bcfda 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 00007f5b28315900 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=00007ffc9e04a000 CR3=000000000fe14000 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=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=00007fa50be59000 CR3=000000000ca28000 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=2035313a35343a3731203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035313a35343a3731203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000