syzkaller login: [ 34.571445] BUG: Bad rss-counter state mm:00000000b9bc72ac type:MM_FILEPAGES val:33 [ 34.573420] BUG: Bad rss-counter state mm:00000000b9bc72ac type:MM_ANONPAGES val:22 [ 34.749073] ================================================================== [ 34.750117] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.751190] Read of size 8 at addr ffff88800d7bbdf0 by task sshd/219 [ 34.752230] [ 34.752479] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.753480] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.754609] Call Trace: [ 34.754972] [ 34.755295] dump_stack_lvl+0x91/0xf0 [ 34.755858] print_report+0xcc/0x620 [ 34.756413] ? __virt_addr_valid+0x102/0x340 [ 34.757053] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.757764] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.758467] kasan_report+0xbe/0xf0 [ 34.759031] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.759768] vma_interval_tree_remove+0xc75/0xec0 [ 34.760481] vma_prepare+0xc54/0x11a0 [ 34.761066] __split_vma+0x5af/0x950 [ 34.761623] ? __pfx___split_vma+0x10/0x10 [ 34.762246] ? find_held_lock+0x2c/0x110 [ 34.762861] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.763525] ? lock_is_held_type+0x9f/0x120 [ 34.764162] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.764899] ? mtree_range_walk+0x632/0x900 [ 34.765545] ? mas_walk+0x5c7/0x7c0 [ 34.766102] do_vmi_munmap+0x1f1/0x2b0 [ 34.766686] mmap_region+0x1f9/0x2660 [ 34.767257] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.767861] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.768704] ? __pfx_lock_acquire+0x10/0x10 [ 34.769318] ? __pfx_mmap_region+0x10/0x10 [ 34.769940] ? security_mmap_addr+0x7d/0xa0 [ 34.770564] ? get_unmapped_area+0x1f5/0x3f0 [ 34.771204] do_mmap+0x854/0xf00 [ 34.771722] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.772298] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.772973] ksys_mmap_pgoff+0x3af/0x500 [ 34.773574] do_syscall_64+0x3f/0x90 [ 34.774137] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.774893] RIP: 0033:0x7f771871ed82 [ 34.775432] 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 [ 34.777923] RSP: 002b:00007ffea86c4758 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.778977] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f771871ed82 [ 34.779972] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7717b58000 [ 34.780985] RBP: 00007f7717b58000 R08: 0000000000000009 R09: 0000000000001000 [ 34.781983] R10: 0000000000000812 R11: 0000000000000206 R12: 000056417f1a8ec0 [ 34.782971] R13: 00007ffea86c4770 R14: 00007ffea86c47a0 R15: 00007ffea86c4b00 [ 34.783983] [ 34.784325] [ 34.784581] Allocated by task 211: [ 34.785085] kasan_save_stack+0x22/0x50 [ 34.785680] kasan_set_track+0x25/0x30 [ 34.786257] __kasan_slab_alloc+0x59/0x70 [ 34.786876] kmem_cache_alloc+0x16b/0x370 [ 34.787479] vm_area_dup+0x20/0x160 [ 34.788012] __split_vma+0x170/0x950 [ 34.788564] split_vma+0xc6/0x110 [ 34.789075] mprotect_fixup+0x8d2/0xb30 [ 34.789666] do_mprotect_pkey+0x87e/0xd40 [ 34.790282] __x64_sys_mprotect+0x78/0xc0 [ 34.790892] do_syscall_64+0x3f/0x90 [ 34.791450] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.792197] [ 34.792445] Freed by task 211: [ 34.792918] kasan_save_stack+0x22/0x50 [ 34.793514] kasan_set_track+0x25/0x30 [ 34.794089] kasan_save_free_info+0x2b/0x50 [ 34.794709] __kasan_slab_free+0x10a/0x190 [ 34.795328] kmem_cache_free+0x10d/0x4d0 [ 34.795915] rcu_core+0x8c8/0x2860 [ 34.796431] __do_softirq+0x1b7/0x7d4 [ 34.796994] [ 34.797240] Last potentially related work creation: [ 34.797918] kasan_save_stack+0x22/0x50 [ 34.798499] __kasan_record_aux_stack+0x8e/0xa0 [ 34.799159] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.799904] remove_vma+0x139/0x170 [ 34.800433] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.801093] do_vmi_munmap+0x1f1/0x2b0 [ 34.801652] __vm_munmap+0x138/0x3a0 [ 34.802193] __x64_sys_munmap+0x59/0x80 [ 34.802773] do_syscall_64+0x3f/0x90 [ 34.803322] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.804064] [ 34.804314] Second to last potentially related work creation: [ 34.805112] kasan_save_stack+0x22/0x50 [ 34.805701] __kasan_record_aux_stack+0x8e/0xa0 [ 34.806355] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.807096] remove_vma+0x139/0x170 [ 34.807617] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.808262] do_vmi_munmap+0x1f1/0x2b0 [ 34.808852] mmap_region+0x1f9/0x2660 [ 34.809410] do_mmap+0x854/0xf00 [ 34.809904] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.810475] ksys_mmap_pgoff+0x3af/0x500 [ 34.811055] do_syscall_64+0x3f/0x90 [ 34.811606] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.812343] [ 34.812601] The buggy address belongs to the object at ffff88800d7bbd98 [ 34.812601] which belongs to the cache vm_area_struct of size 168 [ 34.814298] The buggy address is located 88 bytes inside of [ 34.814298] freed 168-byte region [ffff88800d7bbd98, ffff88800d7bbe40) [ 34.815908] [ 34.816152] The buggy address belongs to the physical page: [ 34.816919] page:00000000ad6524e0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd7bb [ 34.818158] memcg:ffff88800cda9b01 [ 34.818648] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.819386] page_type: 0xffffffff() [ 34.819902] raw: 0100000000000200 ffff88800879fc80 ffffea0000384f40 dead000000000006 [ 34.820971] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cda9b01 [ 34.822004] page dumped because: kasan: bad access detected [ 34.822767] [ 34.823014] Memory state around the buggy address: [ 34.823671] ffff88800d7bbc80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 34.824664] ffff88800d7bbd00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 34.825653] >ffff88800d7bbd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 34.826628] ^ [ 34.827556] ffff88800d7bbe00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 34.828537] ffff88800d7bbe80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 34.829536] ================================================================== [ 34.831118] Disabling lock debugging due to kernel taint [ 36.691435] BUG: Bad rss-counter state mm:00000000b4128408 type:MM_FILEPAGES val:33 [ 36.693140] BUG: Bad rss-counter state mm:00000000b4128408 type:MM_ANONPAGES val:22 [ 37.170038] BUG: Bad rss-counter state mm:00000000fc61880f type:MM_FILEPAGES val:33 [ 37.171603] BUG: Bad rss-counter state mm:00000000fc61880f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:12164' (ECDSA) to the list of known hosts. 2023/06/20 04:05:48 fuzzer started 2023/06/20 04:05:48 dialing manager at localhost:44161 2023/06/20 04:05:48 checking machine... 2023/06/20 04:05:48 checking revisions... [ 37.914665] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:05:48 testing simple program... [ 37.964785] cgroup: Unknown subsys name 'net' [ 38.001027] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:05:42 Registers: info registers vcpu 0 RAX=ffffffff81370a3a RBX=0000000000000002 RCX=0000000000000002 RDX=ffff88806ce09d01 RSI=ffff88806ce09dd8 RDI=ffff88806ce09dd8 RBP=ffff88806ce09ac8 RSP=ffff88806ce09a00 R8 =ffffffff86137cb0 R9 =ffff88806ce09ab0 R10=0000000000038001 R11=0000000000020ed0 R12=ffff88806ce09ad0 R13=ffff88806ce09ab8 R14=ffff88806ce09de0 R15=ffff88806ce09a70 RIP=ffffffff81131041 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 00007f010105c900 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=00007f0101611650 CR3=000000001ac98000 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=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007f145610af90 CR3=000000000c5a6000 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=2037343a35303a3430203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037343a35303a3430203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000