syzkaller login: [ 30.833056] BUG: Bad rss-counter state mm:00000000dd224915 type:MM_FILEPAGES val:33 [ 30.834539] BUG: Bad rss-counter state mm:00000000dd224915 type:MM_ANONPAGES val:22 [ 30.976794] ================================================================== [ 30.977795] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.978817] Read of size 8 at addr ffff88801a063a50 by task sshd/221 [ 30.979806] [ 30.980046] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.980976] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.982038] Call Trace: [ 30.982381] [ 30.982683] dump_stack_lvl+0x91/0xf0 [ 30.983205] print_report+0xcc/0x620 [ 30.983747] ? __virt_addr_valid+0x102/0x340 [ 30.984356] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.985037] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.985710] kasan_report+0xbe/0xf0 [ 30.986221] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.986893] vma_interval_tree_remove+0xc75/0xec0 [ 30.987531] vma_prepare+0xc54/0x11a0 [ 30.988078] __split_vma+0x5af/0x950 [ 30.988579] ? __pfx___split_vma+0x10/0x10 [ 30.989150] ? find_held_lock+0x2c/0x110 [ 30.989712] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.990319] ? lock_is_held_type+0x9f/0x120 [ 30.990896] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.991562] ? mtree_range_walk+0x632/0x900 [ 30.992190] ? mas_walk+0x5c7/0x7c0 [ 30.992718] do_vmi_munmap+0x1f1/0x2b0 [ 30.993259] mmap_region+0x1f9/0x2660 [ 30.993771] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.994316] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.995071] ? __pfx_lock_acquire+0x10/0x10 [ 30.995647] ? __pfx_mmap_region+0x10/0x10 [ 30.996219] ? security_mmap_addr+0x7d/0xa0 [ 30.996793] ? get_unmapped_area+0x1f5/0x3f0 [ 30.997402] do_mmap+0x854/0xf00 [ 30.997890] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.998438] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.999055] ksys_mmap_pgoff+0x3af/0x500 [ 30.999631] do_syscall_64+0x3f/0x90 [ 31.000159] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.000846] RIP: 0033:0x7f3ba5adad82 [ 31.001335] 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 [ 31.003606] RSP: 002b:00007ffd8cb20cd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.004563] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3ba5adad82 [ 31.005467] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3ba4f14000 [ 31.006365] RBP: 00007f3ba4f14000 R08: 0000000000000009 R09: 0000000000001000 [ 31.007271] R10: 0000000000000812 R11: 0000000000000206 R12: 000055617aabbec0 [ 31.008195] R13: 00007ffd8cb20cf0 R14: 00007ffd8cb20d20 R15: 00007ffd8cb21080 [ 31.009107] [ 31.009421] [ 31.009652] Allocated by task 214: [ 31.010121] kasan_save_stack+0x22/0x50 [ 31.010662] kasan_set_track+0x25/0x30 [ 31.011223] __kasan_slab_alloc+0x59/0x70 [ 31.011788] kmem_cache_alloc+0x16b/0x370 [ 31.012343] vm_area_dup+0x20/0x160 [ 31.012832] __split_vma+0x170/0x950 [ 31.013333] split_vma+0xc6/0x110 [ 31.013799] mprotect_fixup+0x8d2/0xb30 [ 31.014334] do_mprotect_pkey+0x87e/0xd40 [ 31.014895] __x64_sys_mprotect+0x78/0xc0 [ 31.015449] do_syscall_64+0x3f/0x90 [ 31.015980] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.016700] [ 31.016933] Freed by task 214: [ 31.017355] kasan_save_stack+0x22/0x50 [ 31.017899] kasan_set_track+0x25/0x30 [ 31.018418] kasan_save_free_info+0x2b/0x50 [ 31.018988] __kasan_slab_free+0x10a/0x190 [ 31.019548] kmem_cache_free+0x10d/0x4d0 [ 31.020098] rcu_core+0x8c8/0x2860 [ 31.020619] __do_softirq+0x1b7/0x7d4 [ 31.021122] [ 31.021349] Last potentially related work creation: [ 31.021967] kasan_save_stack+0x22/0x50 [ 31.022495] __kasan_record_aux_stack+0x8e/0xa0 [ 31.023099] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.023800] remove_vma+0x139/0x170 [ 31.024279] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.024866] do_vmi_munmap+0x1f1/0x2b0 [ 31.025379] __vm_munmap+0x138/0x3a0 [ 31.025870] __x64_sys_munmap+0x59/0x80 [ 31.026397] do_syscall_64+0x3f/0x90 [ 31.026901] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.027577] [ 31.027818] The buggy address belongs to the object at ffff88801a0639f8 [ 31.027818] which belongs to the cache vm_area_struct of size 168 [ 31.029375] The buggy address is located 88 bytes inside of [ 31.029375] freed 168-byte region [ffff88801a0639f8, ffff88801a063aa0) [ 31.030864] [ 31.031092] The buggy address belongs to the physical page: [ 31.031797] page:000000002c0c0068 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a063 [ 31.032982] memcg:ffff88800fec7a01 [ 31.033427] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.034113] page_type: 0xffffffff() [ 31.034583] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.035549] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fec7a01 [ 31.036526] page dumped because: kasan: bad access detected [ 31.037225] [ 31.037460] Memory state around the buggy address: [ 31.038082] ffff88801a063900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.038997] ffff88801a063980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 31.039925] >ffff88801a063a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.040837] ^ [ 31.041592] ffff88801a063a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 31.042504] ffff88801a063b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.043423] ================================================================== [ 31.044452] Disabling lock debugging due to kernel taint [ 33.924095] BUG: Bad rss-counter state mm:000000003412a0e5 type:MM_FILEPAGES val:33 [ 33.925087] BUG: Bad rss-counter state mm:000000003412a0e5 type:MM_ANONPAGES val:22 [ 34.419487] BUG: Bad rss-counter state mm:000000002a61a5f6 type:MM_FILEPAGES val:33 [ 34.420682] BUG: Bad rss-counter state mm:000000002a61a5f6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:9771' (ECDSA) to the list of known hosts. 2023/06/20 17:13:04 fuzzer started 2023/06/20 17:13:05 dialing manager at localhost:36067 2023/06/20 17:13:05 checking machine... 2023/06/20 17:13:05 checking revisions... [ 35.149098] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:13:05 testing simple program... [ 35.256104] cgroup: Unknown subsys name 'net' [ 35.308095] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:13:04 Registers: info registers vcpu 0 RAX=ffffffff8185af33 RBX=000000000000000a RCX=0000000000000001 RDX=0000000000092cc0 RSI=000000000000000c RDI=ffff88801431fa58 RBP=dffffc0000000000 RSP=ffff88801431f980 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=000000000000000c R13=0000000000092cc0 R14=ffff88801431fa10 R15=0000000000092cc0 RIP=ffffffff813ad656 RFL=00000206 [-----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 00007f6c299de900 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=00007f6c28e35bf0 CR3=000000000c5da000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=af4a898e0b7e8d2000000000000ae988 XMM05=1319e678c5640f8a00000000001328b8 XMM06=8fede82a5ad58cbe0000000000132820 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff8180803a RDX=dffffc0000000000 RSI=ffffffff8180803b RDI=ffff88801630f628 RBP=ffff88801630f680 RSP=ffff88801630f5b8 R8 =0000000000000001 R9 =ffff88801630f668 R10=0000000000038001 R11=0000000000020de5 R12=ffff88801630f688 R13=ffff88801630f670 R14=ffff88801630f669 R15=ffff88801630f628 RIP=ffffffff81130719 RFL=00000286 [--S--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 00007f878bb10700 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=00007ffd1fee9000 CR3=000000000e78a000 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=2034303a33313a3731203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034303a33313a3731203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000