syzkaller login: [ 36.716528] BUG: Bad rss-counter state mm:000000009dc8a750 type:MM_FILEPAGES val:33 [ 36.718199] BUG: Bad rss-counter state mm:000000009dc8a750 type:MM_ANONPAGES val:22 [ 36.868388] ================================================================== [ 36.869307] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.870287] Read of size 8 at addr ffff8880096a8b38 by task sshd/219 [ 36.871175] [ 36.871483] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.872365] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.873369] Call Trace: [ 36.873727] [ 36.874018] dump_stack_lvl+0x91/0xf0 [ 36.874522] print_report+0xcc/0x620 [ 36.875023] ? __virt_addr_valid+0x102/0x340 [ 36.875612] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.876243] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.876881] kasan_report+0xbe/0xf0 [ 36.877361] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.878001] vma_interval_tree_remove+0xc75/0xec0 [ 36.878616] vma_prepare+0xc54/0x11a0 [ 36.879097] __split_vma+0x5af/0x950 [ 36.879578] ? __pfx___split_vma+0x10/0x10 [ 36.880116] ? find_held_lock+0x2c/0x110 [ 36.880638] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.881219] ? lock_is_held_type+0x9f/0x120 [ 36.881760] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.882374] ? mtree_range_walk+0x632/0x900 [ 36.882926] ? mas_walk+0x5c7/0x7c0 [ 36.883422] do_vmi_munmap+0x1f1/0x2b0 [ 36.883924] mmap_region+0x1f9/0x2660 [ 36.884426] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.884939] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.885659] ? __pfx_lock_acquire+0x10/0x10 [ 36.886196] ? __pfx_mmap_region+0x10/0x10 [ 36.886730] ? security_mmap_addr+0x7d/0xa0 [ 36.887304] ? get_unmapped_area+0x1f5/0x3f0 [ 36.887852] do_mmap+0x854/0xf00 [ 36.888301] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.888796] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.889359] ksys_mmap_pgoff+0x3af/0x500 [ 36.889875] do_syscall_64+0x3f/0x90 [ 36.890373] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.891016] RIP: 0033:0x7fea065c9d82 [ 36.891484] 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 [ 36.893634] RSP: 002b:00007ffea42cb2d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.894555] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fea065c9d82 [ 36.895438] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fea05a03000 [ 36.896333] RBP: 00007fea05a03000 R08: 0000000000000009 R09: 0000000000001000 [ 36.897230] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c4daff9b20 [ 36.898121] R13: 00007ffea42cb2f0 R14: 00007ffea42cb320 R15: 00007ffea42cb680 [ 36.899029] [ 36.899351] [ 36.899571] Allocated by task 212: [ 36.900025] kasan_save_stack+0x22/0x50 [ 36.900556] kasan_set_track+0x25/0x30 [ 36.901070] __kasan_slab_alloc+0x59/0x70 [ 36.901617] kmem_cache_alloc+0x16b/0x370 [ 36.902156] vm_area_dup+0x20/0x160 [ 36.902629] __split_vma+0x170/0x950 [ 36.903119] split_vma+0xc6/0x110 [ 36.903580] mprotect_fixup+0x8d2/0xb30 [ 36.904185] do_mprotect_pkey+0x87e/0xd40 [ 36.904734] __x64_sys_mprotect+0x78/0xc0 [ 36.905282] do_syscall_64+0x3f/0x90 [ 36.905788] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.906460] [ 36.906678] Freed by task 212: [ 36.907091] kasan_save_stack+0x22/0x50 [ 36.907636] kasan_set_track+0x25/0x30 [ 36.908158] kasan_save_free_info+0x2b/0x50 [ 36.908711] __kasan_slab_free+0x10a/0x190 [ 36.909272] kmem_cache_free+0x10d/0x4d0 [ 36.909801] rcu_core+0x8c8/0x2860 [ 36.910269] __do_softirq+0x1b7/0x7d4 [ 36.910761] [ 36.910985] Last potentially related work creation: [ 36.911607] kasan_save_stack+0x22/0x50 [ 36.912127] __kasan_record_aux_stack+0x8e/0xa0 [ 36.912814] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.913479] remove_vma+0x139/0x170 [ 36.913946] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.914525] do_vmi_munmap+0x1f1/0x2b0 [ 36.915028] __vm_munmap+0x138/0x3a0 [ 36.915531] __x64_sys_munmap+0x59/0x80 [ 36.916045] do_syscall_64+0x3f/0x90 [ 36.916529] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.917194] [ 36.917412] Second to last potentially related work creation: [ 36.918124] kasan_save_stack+0x22/0x50 [ 36.918655] __kasan_record_aux_stack+0x8e/0xa0 [ 36.919245] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.919914] remove_vma+0x139/0x170 [ 36.920389] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.920970] do_vmi_munmap+0x1f1/0x2b0 [ 36.921475] mmap_region+0x1f9/0x2660 [ 36.921967] do_mmap+0x854/0xf00 [ 36.922414] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.922929] ksys_mmap_pgoff+0x3af/0x500 [ 36.923461] do_syscall_64+0x3f/0x90 [ 36.923955] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.924626] [ 36.924849] The buggy address belongs to the object at ffff8880096a8ae0 [ 36.924849] which belongs to the cache vm_area_struct of size 168 [ 36.926385] The buggy address is located 88 bytes inside of [ 36.926385] freed 168-byte region [ffff8880096a8ae0, ffff8880096a8b88) [ 36.927857] [ 36.928079] The buggy address belongs to the physical page: [ 36.928759] page:00000000b7b58db6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x96a8 [ 36.929882] memcg:ffff88800f801801 [ 36.930326] flags: 0x100000000000200(slab|node=0|zone=1) [ 36.931001] page_type: 0xffffffff() [ 36.931475] raw: 0100000000000200 ffff88800879fc80 ffffea00002578c0 dead000000000008 [ 36.932424] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f801801 [ 36.933354] page dumped because: kasan: bad access detected [ 36.934039] [ 36.934260] Memory state around the buggy address: [ 36.934861] ffff8880096a8a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 36.935766] ffff8880096a8a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 36.936664] >ffff8880096a8b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.937562] ^ [ 36.938190] ffff8880096a8b80: fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 [ 36.939077] ffff8880096a8c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 36.939972] ================================================================== [ 36.940929] Disabling lock debugging due to kernel taint [ 39.576424] BUG: Bad rss-counter state mm:000000003bbe7a38 type:MM_FILEPAGES val:33 [ 39.577592] BUG: Bad rss-counter state mm:000000003bbe7a38 type:MM_ANONPAGES val:22 [ 40.129435] BUG: Bad rss-counter state mm:00000000a1ff04d0 type:MM_FILEPAGES val:33 [ 40.130414] BUG: Bad rss-counter state mm:00000000a1ff04d0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:31192' (ECDSA) to the list of known hosts. 2023/06/19 16:30:51 fuzzer started 2023/06/19 16:30:51 dialing manager at localhost:44161 2023/06/19 16:30:51 checking machine... 2023/06/19 16:30:51 checking revisions... [ 40.727775] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:30:51 testing simple program... [ 40.776368] cgroup: Unknown subsys name 'net' [ 40.820916] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:30:38 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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 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=00007f11bab32000 CR3=000000000cb92000 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=5f0e32310321e385c54a19ac0a953e05 XMM02=000000000011c868eff9b2d0a8fce9cb XMM03=000000000011c9382c67c8bc2e329bc3 XMM04=a011bfdde3d4cfe400000000000ae988 XMM05=a411a8620aa7871e00000000001353a0 XMM06=806171799158d9670000000000134540 XMM07=e042d86d42eb936e00000000001239e0 XMM08=7ab1540125fbdcbb000000000011c938 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff8450b05e RBX=ffffffff813ad420 RCX=ffffffff8609fb01 RDX=1ffff1100d9e1359 RSI=ffffffff8450b05e RDI=ffff88806cf09b38 RBP=ffff88806cf09b08 RSP=ffff88806cf09a68 R8 =ffffffff8609fb08 R9 =ffff88806cf09ab0 R10=0000000000038001 R11=000000000000792d R12=ffff88806cf09b38 R13=0000000000000000 R14=ffff88800e313680 R15=ffff888019e20da8 RIP=ffffffff84532440 RFL=00000282 [--S----] 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 00007ff469013900 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=00007ffeee1d7000 CR3=00000000097f8000 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=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