syzkaller login: [ 60.928776] BUG: Bad rss-counter state mm:000000000a3f8a89 type:MM_FILEPAGES val:33 [ 60.930158] BUG: Bad rss-counter state mm:000000000a3f8a89 type:MM_ANONPAGES val:22 [ 60.972090] ================================================================== [ 60.973432] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 60.974526] Read of size 8 at addr ffff88800e41a140 by task sshd/222 [ 60.975469] [ 60.975756] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 60.976770] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 60.977902] Call Trace: [ 60.978279] [ 60.978618] dump_stack_lvl+0x91/0xf0 [ 60.979197] print_report+0xcc/0x620 [ 60.979774] ? __virt_addr_valid+0x102/0x340 [ 60.980433] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.981162] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.981890] kasan_report+0xbe/0xf0 [ 60.982453] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.983183] vma_interval_tree_remove+0xc75/0xec0 [ 60.983902] vma_prepare+0xc54/0x11a0 [ 60.984466] __split_vma+0x5af/0x950 [ 60.985017] ? __pfx___split_vma+0x10/0x10 [ 60.985636] ? find_held_lock+0x2c/0x110 [ 60.986265] do_vmi_align_munmap+0x2ba/0x11f0 [ 60.986933] ? lock_is_held_type+0x9f/0x120 [ 60.987569] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 60.988289] ? mtree_range_walk+0x632/0x900 [ 60.988932] ? mas_walk+0x5c7/0x7c0 [ 60.989488] do_vmi_munmap+0x1f1/0x2b0 [ 60.990066] mmap_region+0x1f9/0x2660 [ 60.990638] ? vm_mmap_pgoff+0x15c/0x3a0 [ 60.991263] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 60.992145] ? __pfx_lock_acquire+0x10/0x10 [ 60.992784] ? __pfx_mmap_region+0x10/0x10 [ 60.993427] ? security_mmap_addr+0x7d/0xa0 [ 60.994076] ? get_unmapped_area+0x1f5/0x3f0 [ 60.994742] do_mmap+0x854/0xf00 [ 60.995271] vm_mmap_pgoff+0x1a6/0x3a0 [ 60.995889] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 60.996558] ksys_mmap_pgoff+0x3af/0x500 [ 60.997176] do_syscall_64+0x3f/0x90 [ 60.997745] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.998511] RIP: 0033:0x7f09d8ef6d82 [ 60.999062] 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 [ 61.001608] RSP: 002b:00007fffc72c5a08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 61.002670] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f09d8ef6d82 [ 61.003677] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f09d8330000 [ 61.004700] RBP: 00007f09d8330000 R08: 0000000000000009 R09: 0000000000001000 [ 61.005702] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b35d6e0ec0 [ 61.006699] R13: 00007fffc72c5a20 R14: 00007fffc72c5a50 R15: 00007fffc72c5db0 [ 61.007722] [ 61.008066] [ 61.008315] Allocated by task 215: [ 61.008815] kasan_save_stack+0x22/0x50 [ 61.009404] kasan_set_track+0x25/0x30 [ 61.009972] __kasan_slab_alloc+0x59/0x70 [ 61.010580] kmem_cache_alloc+0x16b/0x370 [ 61.011179] vm_area_dup+0x20/0x160 [ 61.011734] __split_vma+0x170/0x950 [ 61.012285] split_vma+0xc6/0x110 [ 61.012795] mprotect_fixup+0x8d2/0xb30 [ 61.013373] do_mprotect_pkey+0x87e/0xd40 [ 61.013973] __x64_sys_mprotect+0x78/0xc0 [ 61.014577] do_syscall_64+0x3f/0x90 [ 61.015122] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.015874] [ 61.016123] Freed by task 215: [ 61.016574] kasan_save_stack+0x22/0x50 [ 61.017165] kasan_set_track+0x25/0x30 [ 61.017750] kasan_save_free_info+0x2b/0x50 [ 61.018372] __kasan_slab_free+0x10a/0x190 [ 61.018991] kmem_cache_free+0x10d/0x4d0 [ 61.019581] rcu_core+0x8c8/0x2860 [ 61.020103] __do_softirq+0x1b7/0x7d4 [ 61.020657] [ 61.020909] Last potentially related work creation: [ 61.021592] kasan_save_stack+0x22/0x50 [ 61.022179] __kasan_record_aux_stack+0x8e/0xa0 [ 61.022853] __call_rcu_common.constprop.0+0x6a/0xb90 [ 61.023607] remove_vma+0x139/0x170 [ 61.024151] do_vmi_align_munmap+0xd4a/0x11f0 [ 61.024795] do_vmi_munmap+0x1f1/0x2b0 [ 61.025358] __vm_munmap+0x138/0x3a0 [ 61.025898] __x64_sys_munmap+0x59/0x80 [ 61.026484] do_syscall_64+0x3f/0x90 [ 61.027034] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.027788] [ 61.028042] The buggy address belongs to the object at ffff88800e41a0e8 [ 61.028042] which belongs to the cache vm_area_struct of size 168 [ 61.029728] The buggy address is located 88 bytes inside of [ 61.029728] freed 168-byte region [ffff88800e41a0e8, ffff88800e41a190) [ 61.031340] [ 61.031591] The buggy address belongs to the physical page: [ 61.032369] page:00000000343979da refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe41a [ 61.033620] memcg:ffff8880164bf701 [ 61.034114] flags: 0x100000000000200(slab|node=0|zone=1) [ 61.034854] page_type: 0xffffffff() [ 61.035376] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 61.036451] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880164bf701 [ 61.037501] page dumped because: kasan: bad access detected [ 61.038316] [ 61.038581] Memory state around the buggy address: [ 61.039283] ffff88800e41a000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 61.040351] ffff88800e41a080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 61.041393] >ffff88800e41a100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.042427] ^ [ 61.043192] ffff88800e41a180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 61.044233] ffff88800e41a200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 61.045294] ================================================================== [ 61.046574] Disabling lock debugging due to kernel taint [ 62.574811] BUG: Bad rss-counter state mm:0000000045add49e type:MM_FILEPAGES val:33 [ 62.575780] BUG: Bad rss-counter state mm:0000000045add49e type:MM_ANONPAGES val:22 [ 62.974139] BUG: Bad rss-counter state mm:0000000027a90013 type:MM_FILEPAGES val:33 [ 62.975244] BUG: Bad rss-counter state mm:0000000027a90013 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61177' (ECDSA) to the list of known hosts. 2023/06/19 20:11:57 fuzzer started 2023/06/19 20:11:57 dialing manager at localhost:44161 2023/06/19 20:11:57 checking machine... 2023/06/19 20:11:57 checking revisions... [ 63.607345] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:11:57 testing simple program... [ 63.642662] cgroup: Unknown subsys name 'net' [ 63.672261] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:11:56 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=ffff888008c58000 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=00007ffbe2d50680 CR3=000000000e44c000 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=2036353a31313a3032203931206e754a XMM01=73732878696e755f6d6170203a5d3133 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3133325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036353a31313a3032203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff83636790 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff88800c5cfc01 RSI=ffff88800c5cfc58 RDI=ffff88800c5cfc58 RBP=ffff88800c5cf920 RSP=ffff88800c5cf850 R8 =0000000000000001 R9 =ffff88800c5cf908 R10=0000000000038001 R11=000000000000fc0f R12=ffff88800c5cf928 R13=ffff88800c5cf910 R14=ffff88800c5cfc58 R15=ffff88800c5cf8c8 RIP=ffffffff8112fbf3 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 00007fd6d40a5900 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=00007ffe5ac85000 CR3=0000000009816000 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=563412feff00545000000000000080fe 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