syzkaller login: [ 31.575263] BUG: Bad rss-counter state mm:0000000007fb041c type:MM_FILEPAGES val:33 [ 31.576490] BUG: Bad rss-counter state mm:0000000007fb041c type:MM_ANONPAGES val:22 [ 31.744108] ================================================================== [ 31.745069] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.746035] Read of size 8 at addr ffff88800c51d968 by task sshd/220 [ 31.746839] [ 31.747056] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.748083] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.749097] Call Trace: [ 31.749426] [ 31.749720] dump_stack_lvl+0x91/0xf0 [ 31.750224] print_report+0xcc/0x620 [ 31.750741] ? __virt_addr_valid+0x102/0x340 [ 31.751295] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.751909] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.752534] kasan_report+0xbe/0xf0 [ 31.753012] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.753645] vma_interval_tree_remove+0xc75/0xec0 [ 31.754260] vma_prepare+0xc54/0x11a0 [ 31.754755] __split_vma+0x5af/0x950 [ 31.755228] ? __pfx___split_vma+0x10/0x10 [ 31.755758] ? find_held_lock+0x2c/0x110 [ 31.756289] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.756878] ? lock_is_held_type+0x9f/0x120 [ 31.757424] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.758051] ? mtree_range_walk+0x632/0x900 [ 31.758636] ? mas_walk+0x5c7/0x7c0 [ 31.759113] do_vmi_munmap+0x1f1/0x2b0 [ 31.759630] mmap_region+0x1f9/0x2660 [ 31.760124] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.760670] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.761426] ? __pfx_lock_acquire+0x10/0x10 [ 31.761975] ? __pfx_mmap_region+0x10/0x10 [ 31.762541] ? security_mmap_addr+0x7d/0xa0 [ 31.763101] ? get_unmapped_area+0x1f5/0x3f0 [ 31.763677] do_mmap+0x854/0xf00 [ 31.764122] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.764639] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.765212] ksys_mmap_pgoff+0x3af/0x500 [ 31.765739] do_syscall_64+0x3f/0x90 [ 31.766234] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.766908] RIP: 0033:0x7ff760a7bd82 [ 31.767364] 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 [ 31.769547] RSP: 002b:00007ffccdc320e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.770450] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff760a7bd82 [ 31.771316] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff75feb5000 [ 31.772211] RBP: 00007ff75feb5000 R08: 0000000000000009 R09: 0000000000001000 [ 31.773074] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557ba41bad90 [ 31.773940] R13: 00007ffccdc32100 R14: 00007ffccdc32130 R15: 00007ffccdc32490 [ 31.774836] [ 31.775130] [ 31.775355] Allocated by task 213: [ 31.775807] kasan_save_stack+0x22/0x50 [ 31.776331] kasan_set_track+0x25/0x30 [ 31.776846] __kasan_slab_alloc+0x59/0x70 [ 31.777413] kmem_cache_alloc+0x16b/0x370 [ 31.777951] vm_area_dup+0x20/0x160 [ 31.778412] __split_vma+0x170/0x950 [ 31.778886] split_vma+0xc6/0x110 [ 31.779332] mprotect_fixup+0x8d2/0xb30 [ 31.779833] do_mprotect_pkey+0x87e/0xd40 [ 31.780392] __x64_sys_mprotect+0x78/0xc0 [ 31.780934] do_syscall_64+0x3f/0x90 [ 31.781431] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.782101] [ 31.782325] Freed by task 213: [ 31.782736] kasan_save_stack+0x22/0x50 [ 31.783254] kasan_set_track+0x25/0x30 [ 31.783759] kasan_save_free_info+0x2b/0x50 [ 31.784302] __kasan_slab_free+0x10a/0x190 [ 31.784850] kmem_cache_free+0x10d/0x4d0 [ 31.785369] rcu_core+0x8c8/0x2860 [ 31.785822] __do_softirq+0x1b7/0x7d4 [ 31.786313] [ 31.786541] Last potentially related work creation: [ 31.787133] kasan_save_stack+0x22/0x50 [ 31.787670] __kasan_record_aux_stack+0x8e/0xa0 [ 31.788275] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.789000] remove_vma+0x139/0x170 [ 31.789453] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.790013] do_vmi_munmap+0x1f1/0x2b0 [ 31.790515] __vm_munmap+0x138/0x3a0 [ 31.790979] __x64_sys_munmap+0x59/0x80 [ 31.791472] do_syscall_64+0x3f/0x90 [ 31.791948] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.792589] [ 31.792805] The buggy address belongs to the object at ffff88800c51d910 [ 31.792805] which belongs to the cache vm_area_struct of size 168 [ 31.794270] The buggy address is located 88 bytes inside of [ 31.794270] freed 168-byte region [ffff88800c51d910, ffff88800c51d9b8) [ 31.795692] [ 31.795913] The buggy address belongs to the physical page: [ 31.796566] page:00000000a70d769d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc51d [ 31.797648] memcg:ffff88800e743201 [ 31.798077] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.798743] page_type: 0xffffffff() [ 31.799197] raw: 0100000000000200 ffff8880087a0c80 ffffea000025ee40 dead000000000006 [ 31.800114] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e743201 [ 31.801020] page dumped because: kasan: bad access detected [ 31.801678] [ 31.801894] Memory state around the buggy address: [ 31.802484] ffff88800c51d800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.803349] ffff88800c51d880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.804207] >ffff88800c51d900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.805130] ^ [ 31.805997] ffff88800c51d980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 31.806979] ffff88800c51da00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.807946] ================================================================== [ 31.809157] Disabling lock debugging due to kernel taint [ 33.963762] BUG: Bad rss-counter state mm:00000000cb38a892 type:MM_FILEPAGES val:33 [ 33.965610] BUG: Bad rss-counter state mm:00000000cb38a892 type:MM_ANONPAGES val:22 [ 34.520258] BUG: Bad rss-counter state mm:00000000eb1e0301 type:MM_FILEPAGES val:33 [ 34.521437] BUG: Bad rss-counter state mm:00000000eb1e0301 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:45607' (ECDSA) to the list of known hosts. 2023/06/21 04:28:19 fuzzer started 2023/06/21 04:28:19 dialing manager at localhost:36067 2023/06/21 04:28:19 checking machine... 2023/06/21 04:28:19 checking revisions... [ 35.144242] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:28:19 testing simple program... [ 35.184336] cgroup: Unknown subsys name 'net' [ 35.236437] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:28:19 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff8608a556 RDX=1ffff110032c9f4c RSI=1ffff110032c9f4b RDI=1ffff110032c9f4b RBP=ffff88801964fa58 RSP=ffff88801964f940 R8 =ffffffff8608a55a R9 =ffff88801964fa40 R10=0000000000038001 R11=0000000000003c0d R12=ffff88801964fa60 R13=ffff88801964fa48 R14=ffff88801964faa8 R15=ffff88801964fa00 RIP=ffffffff811310ce 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 00007f02069e6900 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=00007ffe62192000 CR3=000000000fd10000 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=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=00007f430421dbc0 CR3=0000000016932000 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=2038313a38323a3430203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038313a38323a3430203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000