syzkaller login: [ 30.790822] BUG: Bad rss-counter state mm:00000000e7d73283 type:MM_FILEPAGES val:33 [ 30.792710] BUG: Bad rss-counter state mm:00000000e7d73283 type:MM_ANONPAGES val:22 [ 30.957215] ================================================================== [ 30.958126] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.959075] Read of size 8 at addr ffff888015bf35c8 by task sshd/220 [ 30.959970] [ 30.960197] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.961064] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.962071] Call Trace: [ 30.962395] [ 30.962683] dump_stack_lvl+0x91/0xf0 [ 30.963182] print_report+0xcc/0x620 [ 30.963671] ? __virt_addr_valid+0x102/0x340 [ 30.964230] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.964857] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.965480] kasan_report+0xbe/0xf0 [ 30.965964] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.966593] vma_interval_tree_remove+0xc75/0xec0 [ 30.967202] vma_prepare+0xc54/0x11a0 [ 30.967683] __split_vma+0x5af/0x950 [ 30.968165] ? __pfx___split_vma+0x10/0x10 [ 30.968704] ? find_held_lock+0x2c/0x110 [ 30.969226] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.969798] ? lock_is_held_type+0x9f/0x120 [ 30.970352] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.970970] ? mtree_range_walk+0x632/0x900 [ 30.971528] ? mas_walk+0x5c7/0x7c0 [ 30.972033] do_vmi_munmap+0x1f1/0x2b0 [ 30.972531] mmap_region+0x1f9/0x2660 [ 30.973017] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.973535] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.974258] ? __pfx_lock_acquire+0x10/0x10 [ 30.974800] ? __pfx_mmap_region+0x10/0x10 [ 30.975333] ? security_mmap_addr+0x7d/0xa0 [ 30.975882] ? get_unmapped_area+0x1f5/0x3f0 [ 30.976435] do_mmap+0x854/0xf00 [ 30.976882] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.977389] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.977959] ksys_mmap_pgoff+0x3af/0x500 [ 30.978475] do_syscall_64+0x3f/0x90 [ 30.978963] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.979614] RIP: 0033:0x7f290e510d82 [ 30.980092] 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 [ 30.982255] RSP: 002b:00007ffd80913838 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.983172] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f290e510d82 [ 30.984037] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f290d94a000 [ 30.984895] RBP: 00007f290d94a000 R08: 0000000000000009 R09: 0000000000001000 [ 30.985749] R10: 0000000000000812 R11: 0000000000000206 R12: 000055dc6cfdad90 [ 30.986609] R13: 00007ffd80913850 R14: 00007ffd80913880 R15: 00007ffd80913be0 [ 30.987481] [ 30.987782] [ 30.988018] Allocated by task 213: [ 30.988462] kasan_save_stack+0x22/0x50 [ 30.988980] kasan_set_track+0x25/0x30 [ 30.989485] __kasan_slab_alloc+0x59/0x70 [ 30.990010] kmem_cache_alloc+0x16b/0x370 [ 30.990529] vm_area_dup+0x20/0x160 [ 30.990996] __split_vma+0x170/0x950 [ 30.991466] split_vma+0xc6/0x110 [ 30.991918] mprotect_fixup+0x8d2/0xb30 [ 30.992431] do_mprotect_pkey+0x87e/0xd40 [ 30.992960] __x64_sys_mprotect+0x78/0xc0 [ 30.993492] do_syscall_64+0x3f/0x90 [ 30.993969] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.994625] [ 30.994844] Freed by task 203: [ 30.995245] kasan_save_stack+0x22/0x50 [ 30.995758] kasan_set_track+0x25/0x30 [ 30.996268] kasan_save_free_info+0x2b/0x50 [ 30.996813] __kasan_slab_free+0x10a/0x190 [ 30.997351] kmem_cache_free+0x10d/0x4d0 [ 30.997869] rcu_core+0x8c8/0x2860 [ 30.998323] __do_softirq+0x1b7/0x7d4 [ 30.998812] [ 30.999026] Last potentially related work creation: [ 30.999624] kasan_save_stack+0x22/0x50 [ 31.000156] __kasan_record_aux_stack+0x8e/0xa0 [ 31.000746] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.001394] remove_vma+0x139/0x170 [ 31.001849] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.002410] do_vmi_munmap+0x1f1/0x2b0 [ 31.002901] __vm_munmap+0x138/0x3a0 [ 31.003379] __x64_sys_munmap+0x59/0x80 [ 31.003884] do_syscall_64+0x3f/0x90 [ 31.004362] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.005011] [ 31.005226] The buggy address belongs to the object at ffff888015bf3570 [ 31.005226] which belongs to the cache vm_area_struct of size 168 [ 31.006754] The buggy address is located 88 bytes inside of [ 31.006754] freed 168-byte region [ffff888015bf3570, ffff888015bf3618) [ 31.008193] [ 31.008413] The buggy address belongs to the physical page: [ 31.009081] page:0000000075c89b06 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15bf3 [ 31.010175] memcg:ffff88800d63b301 [ 31.010612] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.011318] page_type: 0xffffffff() [ 31.011771] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 31.012708] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d63b301 [ 31.013620] page dumped because: kasan: bad access detected [ 31.014289] [ 31.014515] Memory state around the buggy address: [ 31.015091] ffff888015bf3480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.015962] ffff888015bf3500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 31.016831] >ffff888015bf3580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.017696] ^ [ 31.018363] ffff888015bf3600: fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 [ 31.019224] ffff888015bf3680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.020087] ================================================================== [ 31.021072] Disabling lock debugging due to kernel taint [ 32.987196] BUG: Bad rss-counter state mm:00000000b474caa6 type:MM_FILEPAGES val:33 [ 32.988872] BUG: Bad rss-counter state mm:00000000b474caa6 type:MM_ANONPAGES val:22 [ 33.474315] BUG: Bad rss-counter state mm:00000000e5b91539 type:MM_FILEPAGES val:33 [ 33.475580] BUG: Bad rss-counter state mm:00000000e5b91539 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:49683' (ECDSA) to the list of known hosts. 2023/06/20 11:57:41 fuzzer started 2023/06/20 11:57:41 dialing manager at localhost:36067 2023/06/20 11:57:41 checking machine... 2023/06/20 11:57:41 checking revisions... [ 34.191063] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:57:41 testing simple program... [ 34.236745] cgroup: Unknown subsys name 'net' [ 34.273576] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:57:41 Registers: info registers vcpu 0 RAX=0000000000010001 RBX=0000000000000007 RCX=0000000000000000 RDX=ffff88801814d1c0 RSI=ffffffff813bec9e RDI=0000000000000001 RBP=ffff88806ce2b940 RSP=ffff88806ce09f00 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=0000000000000000 R13=ffff88806ce2b984 R14=0000000000000000 R15=ffff88806ce2b940 RIP=ffffffff814c0880 RFL=00000046 [---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 00007f87e28ab900 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=00007f87e2e60650 CR3=000000001022c000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=ffff88801672e5c0 RCX=ffffffff818526b3 RDX=0000000000000004 RSI=0000000000000000 RDI=0000000000000007 RBP=ffff8880165928d0 RSP=ffff88800d8cfa88 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000004 R11=0000000000000001 R12=0000000000000000 R13=ffff88800e587d00 R14=0000000000000004 R15=0000000000000020 RIP=ffffffff814c0250 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 00007f87e28ab900 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=00007f87e2e630b0 CR3=000000001022c000 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=00000000000000000000000000000000 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000