syzkaller login: [ 59.843516] BUG: Bad rss-counter state mm:00000000ae58f1fb type:MM_FILEPAGES val:33 [ 59.845070] BUG: Bad rss-counter state mm:00000000ae58f1fb type:MM_ANONPAGES val:22 [ 60.005701] ================================================================== [ 60.006617] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 60.007561] Read of size 8 at addr ffff88800f46b228 by task sshd/226 [ 60.008437] [ 60.008661] CPU: 0 PID: 226 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 60.009533] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 60.010520] Call Trace: [ 60.010839] [ 60.011125] dump_stack_lvl+0x91/0xf0 [ 60.011623] print_report+0xcc/0x620 [ 60.012104] ? __virt_addr_valid+0x102/0x340 [ 60.012678] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.013308] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.013928] kasan_report+0xbe/0xf0 [ 60.014411] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.015038] vma_interval_tree_remove+0xc75/0xec0 [ 60.015651] vma_prepare+0xc54/0x11a0 [ 60.016137] __split_vma+0x5af/0x950 [ 60.016641] ? __pfx___split_vma+0x10/0x10 [ 60.017166] ? find_held_lock+0x2c/0x110 [ 60.017702] do_vmi_align_munmap+0x2ba/0x11f0 [ 60.018271] ? lock_is_held_type+0x9f/0x120 [ 60.018812] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 60.019429] ? mtree_range_walk+0x632/0x900 [ 60.019984] ? mas_walk+0x5c7/0x7c0 [ 60.020480] do_vmi_munmap+0x1f1/0x2b0 [ 60.020980] mmap_region+0x1f9/0x2660 [ 60.021474] ? vm_mmap_pgoff+0x15c/0x3a0 [ 60.021982] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 60.022696] ? __pfx_lock_acquire+0x10/0x10 [ 60.023243] ? __pfx_mmap_region+0x10/0x10 [ 60.023783] ? security_mmap_addr+0x7d/0xa0 [ 60.024314] ? get_unmapped_area+0x1f5/0x3f0 [ 60.024881] do_mmap+0x854/0xf00 [ 60.025333] vm_mmap_pgoff+0x1a6/0x3a0 [ 60.025834] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 60.026396] ksys_mmap_pgoff+0x3af/0x500 [ 60.026912] do_syscall_64+0x3f/0x90 [ 60.027415] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.028065] RIP: 0033:0x7f68985add82 [ 60.028546] 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 [ 60.030692] RSP: 002b:00007ffe964d39e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 60.031616] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f68985add82 [ 60.032508] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f68979e7000 [ 60.033361] RBP: 00007f68979e7000 R08: 0000000000000009 R09: 0000000000001000 [ 60.034269] R10: 0000000000000812 R11: 0000000000000206 R12: 00005596aff50ec0 [ 60.035191] R13: 00007ffe964d3a00 R14: 00007ffe964d3a30 R15: 00007ffe964d3d90 [ 60.036123] [ 60.036453] [ 60.036685] Allocated by task 219: [ 60.037150] kasan_save_stack+0x22/0x50 [ 60.037694] kasan_set_track+0x25/0x30 [ 60.038227] __kasan_slab_alloc+0x59/0x70 [ 60.038791] kmem_cache_alloc+0x16b/0x370 [ 60.039348] vm_area_dup+0x20/0x160 [ 60.039840] __split_vma+0x170/0x950 [ 60.040339] split_vma+0xc6/0x110 [ 60.040832] mprotect_fixup+0x8d2/0xb30 [ 60.041374] do_mprotect_pkey+0x87e/0xd40 [ 60.041935] __x64_sys_mprotect+0x78/0xc0 [ 60.042498] do_syscall_64+0x3f/0x90 [ 60.042996] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.043669] [ 60.043895] Freed by task 219: [ 60.044306] kasan_save_stack+0x22/0x50 [ 60.044849] kasan_set_track+0x25/0x30 [ 60.045360] kasan_save_free_info+0x2b/0x50 [ 60.045914] __kasan_slab_free+0x10a/0x190 [ 60.046467] kmem_cache_free+0x10d/0x4d0 [ 60.047001] rcu_core+0x8c8/0x2860 [ 60.047465] __do_softirq+0x1b7/0x7d4 [ 60.047955] [ 60.048181] Last potentially related work creation: [ 60.048813] kasan_save_stack+0x22/0x50 [ 60.049341] __kasan_record_aux_stack+0x8e/0xa0 [ 60.049937] __call_rcu_common.constprop.0+0x6a/0xb90 [ 60.050614] remove_vma+0x139/0x170 [ 60.051089] do_vmi_align_munmap+0xd4a/0x11f0 [ 60.051669] do_vmi_munmap+0x1f1/0x2b0 [ 60.052173] __vm_munmap+0x138/0x3a0 [ 60.052681] __x64_sys_munmap+0x59/0x80 [ 60.053195] do_syscall_64+0x3f/0x90 [ 60.053701] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.054368] [ 60.054595] The buggy address belongs to the object at ffff88800f46b1d0 [ 60.054595] which belongs to the cache vm_area_struct of size 168 [ 60.056131] The buggy address is located 88 bytes inside of [ 60.056131] freed 168-byte region [ffff88800f46b1d0, ffff88800f46b278) [ 60.057617] [ 60.057841] The buggy address belongs to the physical page: [ 60.058534] page:00000000238d7a21 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf46b [ 60.059674] memcg:ffff88800dbd1301 [ 60.060123] flags: 0x100000000000200(slab|node=0|zone=1) [ 60.060822] page_type: 0xffffffff() [ 60.061290] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 60.062259] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dbd1301 [ 60.063208] page dumped because: kasan: bad access detected [ 60.063905] [ 60.064128] Memory state around the buggy address: [ 60.064753] ffff88800f46b100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 60.065654] ffff88800f46b180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 60.066547] >ffff88800f46b200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 60.067437] ^ [ 60.068022] ffff88800f46b280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 60.068922] ffff88800f46b300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 60.069819] ================================================================== [ 60.070842] Disabling lock debugging due to kernel taint [ 62.728476] BUG: Bad rss-counter state mm:000000009d2b2701 type:MM_FILEPAGES val:33 [ 62.729712] BUG: Bad rss-counter state mm:000000009d2b2701 type:MM_ANONPAGES val:22 [ 63.213876] BUG: Bad rss-counter state mm:00000000c73d8501 type:MM_FILEPAGES val:33 [ 63.215036] BUG: Bad rss-counter state mm:00000000c73d8501 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:44546' (ECDSA) to the list of known hosts. 2023/06/20 02:49:08 fuzzer started 2023/06/20 02:49:08 dialing manager at localhost:44161 2023/06/20 02:49:08 checking machine... 2023/06/20 02:49:08 checking revisions... [ 63.848219] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:49:08 testing simple program... [ 63.902690] cgroup: Unknown subsys name 'net' [ 63.948187] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:49:07 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=0000000000000001 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=00007ffcebc15838 CR3=0000000005482000 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=00007fcbe8fae5100000563da189c790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff8880192305e0 RCX=0000000080150014 RDX=0000000000150015 RSI=ffff8880192305e0 RDI=ffff8880087b6500 RBP=ffff8880146e7c68 RSP=ffff8880146e7bd0 R8 =0000000080150014 R9 =0000000000000000 R10=ffffea0000648c00 R11=00000000800d0008 R12=ffffea0000648c00 R13=0000000000000000 R14=0000000000150014 R15=ffff8880087b6500 RIP=ffffffff818095bf RFL=00000242 [---Z---] 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 00007f707e6e4900 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=00007f6347b9f650 CR3=000000000cecc000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=5a10b4b6e9db24a000000000000ae988 XMM05=ea80f46c0f0c476e0000000000134b28 XMM06=6860aeb314f8829d0000000000133650 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000