syzkaller login: [ 38.639138] BUG: Bad rss-counter state mm:00000000cffca7be type:MM_FILEPAGES val:33 [ 38.641029] BUG: Bad rss-counter state mm:00000000cffca7be type:MM_ANONPAGES val:22 [ 38.736138] ================================================================== [ 38.736843] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.737565] Read of size 8 at addr ffff88800ea2f6b0 by task sshd/219 [ 38.738156] [ 38.738323] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.739110] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.739855] Call Trace: [ 38.740097] [ 38.740314] dump_stack_lvl+0x91/0xf0 [ 38.740689] print_report+0xcc/0x620 [ 38.741061] ? __virt_addr_valid+0x102/0x340 [ 38.741480] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.741955] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.742426] kasan_report+0xbe/0xf0 [ 38.742789] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.743286] vma_interval_tree_remove+0xc75/0xec0 [ 38.743749] vma_prepare+0xc54/0x11a0 [ 38.744116] __split_vma+0x5af/0x950 [ 38.744479] ? __pfx___split_vma+0x10/0x10 [ 38.744884] ? find_held_lock+0x2c/0x110 [ 38.745284] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.745716] ? lock_is_held_type+0x9f/0x120 [ 38.746137] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.746607] ? mtree_range_walk+0x632/0x900 [ 38.747056] ? mas_walk+0x5c7/0x7c0 [ 38.747417] do_vmi_munmap+0x1f1/0x2b0 [ 38.747755] mmap_region+0x1f9/0x2660 [ 38.748051] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.748362] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.748795] ? __pfx_lock_acquire+0x10/0x10 [ 38.749109] ? __pfx_mmap_region+0x10/0x10 [ 38.749435] ? security_mmap_addr+0x7d/0xa0 [ 38.749758] ? get_unmapped_area+0x1f5/0x3f0 [ 38.750090] do_mmap+0x854/0xf00 [ 38.750347] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.750639] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.750985] ksys_mmap_pgoff+0x3af/0x500 [ 38.751283] do_syscall_64+0x3f/0x90 [ 38.751577] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.751970] RIP: 0033:0x7f42acfa1d82 [ 38.752257] 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 [ 38.753553] RSP: 002b:00007ffd3ca446d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.754103] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f42acfa1d82 [ 38.754612] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f42ac3db000 [ 38.755144] RBP: 00007f42ac3db000 R08: 0000000000000009 R09: 0000000000001000 [ 38.755657] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d1579b5ec0 [ 38.756178] R13: 00007ffd3ca446f0 R14: 00007ffd3ca44720 R15: 00007ffd3ca44a80 [ 38.756699] [ 38.756876] [ 38.757002] Allocated by task 212: [ 38.757258] kasan_save_stack+0x22/0x50 [ 38.757559] kasan_set_track+0x25/0x30 [ 38.757848] __kasan_slab_alloc+0x59/0x70 [ 38.758153] kmem_cache_alloc+0x16b/0x370 [ 38.758455] vm_area_dup+0x20/0x160 [ 38.758724] __split_vma+0x170/0x950 [ 38.759011] split_vma+0xc6/0x110 [ 38.759280] mprotect_fixup+0x8d2/0xb30 [ 38.759587] do_mprotect_pkey+0x87e/0xd40 [ 38.759889] __x64_sys_mprotect+0x78/0xc0 [ 38.760206] do_syscall_64+0x3f/0x90 [ 38.760481] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.760878] [ 38.761007] Freed by task 212: [ 38.761243] kasan_save_stack+0x22/0x50 [ 38.761546] kasan_set_track+0x25/0x30 [ 38.761849] kasan_save_free_info+0x2b/0x50 [ 38.762169] __kasan_slab_free+0x10a/0x190 [ 38.762478] kmem_cache_free+0x10d/0x4d0 [ 38.762791] rcu_core+0x8c8/0x2860 [ 38.763061] __do_softirq+0x1b7/0x7d4 [ 38.763357] [ 38.763484] Last potentially related work creation: [ 38.763824] kasan_save_stack+0x22/0x50 [ 38.764111] __kasan_record_aux_stack+0x8e/0xa0 [ 38.764451] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.764839] remove_vma+0x139/0x170 [ 38.765113] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.765454] do_vmi_munmap+0x1f1/0x2b0 [ 38.765736] __vm_munmap+0x138/0x3a0 [ 38.766010] __x64_sys_munmap+0x59/0x80 [ 38.766308] do_syscall_64+0x3f/0x90 [ 38.766591] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.766978] [ 38.767110] Second to last potentially related work creation: [ 38.767512] kasan_save_stack+0x22/0x50 [ 38.767812] __kasan_record_aux_stack+0x8e/0xa0 [ 38.768148] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.768527] remove_vma+0x139/0x170 [ 38.768804] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.769134] do_vmi_munmap+0x1f1/0x2b0 [ 38.769419] mmap_region+0x1f9/0x2660 [ 38.769703] do_mmap+0x854/0xf00 [ 38.769962] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.770254] ksys_mmap_pgoff+0x3af/0x500 [ 38.770550] do_syscall_64+0x3f/0x90 [ 38.770834] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.771227] [ 38.771353] The buggy address belongs to the object at ffff88800ea2f658 [ 38.771353] which belongs to the cache vm_area_struct of size 168 [ 38.772254] The buggy address is located 88 bytes inside of [ 38.772254] freed 168-byte region [ffff88800ea2f658, ffff88800ea2f700) [ 38.773113] [ 38.773241] The buggy address belongs to the physical page: [ 38.773634] page:0000000051ce0387 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xea2f [ 38.774275] memcg:ffff888014091601 [ 38.774526] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.774954] page_type: 0xffffffff() [ 38.775229] raw: 0100000000000200 ffff8880087a0c80 ffffea0000632fc0 dead000000000007 [ 38.775792] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888014091601 [ 38.776349] page dumped because: kasan: bad access detected [ 38.776746] [ 38.776870] Memory state around the buggy address: [ 38.777227] ffff88800ea2f580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.777738] ffff88800ea2f600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 38.778260] >ffff88800ea2f680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.778783] ^ [ 38.779140] ffff88800ea2f700: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 [ 38.779671] ffff88800ea2f780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 38.780176] ================================================================== [ 38.780772] Disabling lock debugging due to kernel taint [ 41.157204] BUG: Bad rss-counter state mm:00000000a1b5d77b type:MM_FILEPAGES val:33 [ 41.158404] BUG: Bad rss-counter state mm:00000000a1b5d77b type:MM_ANONPAGES val:22 [ 41.684246] BUG: Bad rss-counter state mm:00000000bf97dc2e type:MM_FILEPAGES val:33 [ 41.685434] BUG: Bad rss-counter state mm:00000000bf97dc2e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:34973' (ECDSA) to the list of known hosts. 2023/06/20 15:56:41 fuzzer started 2023/06/20 15:56:41 dialing manager at localhost:36067 2023/06/20 15:56:41 checking machine... 2023/06/20 15:56:41 checking revisions... [ 42.333861] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:56:41 testing simple program... [ 42.376597] cgroup: Unknown subsys name 'net' [ 42.488734] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:56:41 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=0000000000000001 RDX=1ffff11001e44f47 RSI=ffffffff8186d48e RDI=ffff88800f2279e0 RBP=ffff88800f227a38 RSP=ffff88800f227970 R8 =0000000000000001 R9 =ffff88800f227a20 R10=0000000000038001 R11=00000000000229d9 R12=ffff88800f227aa8 R13=0000000000000000 R14=ffff888016b58000 R15=ffff88800f2279e0 RIP=ffffffff8113062c 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 00007f66e4554900 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=00007f66e4b0b618 CR3=000000000f630000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a 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=ffff888008c04400 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=00007f1f82b28210 CR3=00000000094f6000 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=2031343a36353a3531203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030343a36353a3531203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000