syzkaller login: [ 31.998848] BUG: Bad rss-counter state mm:00000000210db752 type:MM_FILEPAGES val:33 [ 32.000154] BUG: Bad rss-counter state mm:00000000210db752 type:MM_ANONPAGES val:22 [ 32.029048] ================================================================== [ 32.029807] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.030524] Read of size 8 at addr ffff88800e793140 by task sshd/227 [ 32.031108] [ 32.031273] CPU: 0 PID: 227 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 32.031931] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.032677] Call Trace: [ 32.032922] [ 32.033137] dump_stack_lvl+0x91/0xf0 [ 32.033516] print_report+0xcc/0x620 [ 32.033886] ? __virt_addr_valid+0x102/0x340 [ 32.034308] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.034783] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.035258] kasan_report+0xbe/0xf0 [ 32.035629] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.036107] vma_interval_tree_remove+0xc75/0xec0 [ 32.036568] vma_prepare+0xc54/0x11a0 [ 32.036934] __split_vma+0x5af/0x950 [ 32.037292] ? __pfx___split_vma+0x10/0x10 [ 32.037696] ? find_held_lock+0x2c/0x110 [ 32.038098] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.038531] ? lock_is_held_type+0x9f/0x120 [ 32.038944] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.039407] ? mtree_range_walk+0x632/0x900 [ 32.039855] ? mas_walk+0x5c7/0x7c0 [ 32.040210] do_vmi_munmap+0x1f1/0x2b0 [ 32.040528] mmap_region+0x1f9/0x2660 [ 32.040847] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.041183] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.041795] ? __pfx_lock_acquire+0x10/0x10 [ 32.042136] ? __pfx_mmap_region+0x10/0x10 [ 32.042482] ? security_mmap_addr+0x7d/0xa0 [ 32.042823] ? get_unmapped_area+0x1f5/0x3f0 [ 32.043177] do_mmap+0x854/0xf00 [ 32.043462] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.043801] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.044166] ksys_mmap_pgoff+0x3af/0x500 [ 32.044494] do_syscall_64+0x3f/0x90 [ 32.044801] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.045222] RIP: 0033:0x7f96bfd7ed82 [ 32.045521] 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 [ 32.046904] RSP: 002b:00007fff45c95e28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.047492] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f96bfd7ed82 [ 32.048055] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f96bf1b8000 [ 32.048609] RBP: 00007f96bf1b8000 R08: 0000000000000009 R09: 0000000000001000 [ 32.049156] R10: 0000000000000812 R11: 0000000000000206 R12: 00005574f4d14ec0 [ 32.049703] R13: 00007fff45c95e40 R14: 00007fff45c95e70 R15: 00007fff45c961d0 [ 32.050256] [ 32.050449] [ 32.050587] Allocated by task 220: [ 32.050867] kasan_save_stack+0x22/0x50 [ 32.051196] kasan_set_track+0x25/0x30 [ 32.051512] __kasan_slab_alloc+0x59/0x70 [ 32.051858] kmem_cache_alloc+0x16b/0x370 [ 32.052190] vm_area_dup+0x20/0x160 [ 32.052483] __split_vma+0x170/0x950 [ 32.052791] split_vma+0xc6/0x110 [ 32.053093] mprotect_fixup+0x8d2/0xb30 [ 32.053432] do_mprotect_pkey+0x87e/0xd40 [ 32.053768] __x64_sys_mprotect+0x78/0xc0 [ 32.054107] do_syscall_64+0x3f/0x90 [ 32.054421] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.054844] [ 32.054990] Freed by task 220: [ 32.055254] kasan_save_stack+0x22/0x50 [ 32.055595] kasan_set_track+0x25/0x30 [ 32.055924] kasan_save_free_info+0x2b/0x50 [ 32.056288] __kasan_slab_free+0x10a/0x190 [ 32.056655] kmem_cache_free+0x10d/0x4d0 [ 32.057013] rcu_core+0x8c8/0x2860 [ 32.057323] __do_softirq+0x1b7/0x7d4 [ 32.057654] [ 32.057794] Last potentially related work creation: [ 32.058190] kasan_save_stack+0x22/0x50 [ 32.058524] __kasan_record_aux_stack+0x8e/0xa0 [ 32.058914] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.059353] remove_vma+0x139/0x170 [ 32.059673] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.060049] do_vmi_munmap+0x1f1/0x2b0 [ 32.060365] __vm_munmap+0x138/0x3a0 [ 32.060677] __x64_sys_munmap+0x59/0x80 [ 32.061016] do_syscall_64+0x3f/0x90 [ 32.061339] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.061773] [ 32.061916] The buggy address belongs to the object at ffff88800e7930e8 [ 32.061916] which belongs to the cache vm_area_struct of size 168 [ 32.062893] The buggy address is located 88 bytes inside of [ 32.062893] freed 168-byte region [ffff88800e7930e8, ffff88800e793190) [ 32.063823] [ 32.063964] The buggy address belongs to the physical page: [ 32.064396] page:000000002a0959f5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe793 [ 32.065100] memcg:ffff88800e8b2301 [ 32.065385] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.065814] page_type: 0xffffffff() [ 32.066106] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 32.066710] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e8b2301 [ 32.067310] page dumped because: kasan: bad access detected [ 32.067767] [ 32.067906] Memory state around the buggy address: [ 32.068285] ffff88800e793000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.068843] ffff88800e793080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 32.069411] >ffff88800e793100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.069970] ^ [ 32.070387] ffff88800e793180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 32.070956] ffff88800e793200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 32.071517] ================================================================== [ 32.072212] Disabling lock debugging due to kernel taint [ 34.173286] BUG: Bad rss-counter state mm:000000007cae2733 type:MM_FILEPAGES val:33 [ 34.174499] BUG: Bad rss-counter state mm:000000007cae2733 type:MM_ANONPAGES val:22 [ 34.669979] BUG: Bad rss-counter state mm:00000000c2d8b3dd type:MM_FILEPAGES val:33 [ 34.671113] BUG: Bad rss-counter state mm:00000000c2d8b3dd type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:50941' (ECDSA) to the list of known hosts. 2023/06/21 05:45:09 fuzzer started 2023/06/21 05:45:09 dialing manager at localhost:36067 2023/06/21 05:45:09 checking machine... 2023/06/21 05:45:09 checking revisions... [ 35.272601] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:45:09 testing simple program... [ 35.322416] cgroup: Unknown subsys name 'net' [ 35.384385] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:45:09 Registers: info registers vcpu 0 RAX=1ffffffff0bf82ad RBX=ffffffff85fc1568 RCX=ffffffff83866afd RDX=0000000000000000 RSI=ffffffff863dde7e RDI=ffffffff85fc1568 RBP=ffffffff85fc1568 RSP=ffff88806ce099e0 R8 =ffffffff863dde7e R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000091ae9 R12=ffffffff85fc1568 R13=ffffffff85fc1568 R14=ffffffff85fc1568 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000212 [----A--] 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 00007fb741ec6900 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=00007ffcd465b000 CR3=0000000016ae4000 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=0000000000000001 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=00007f138b024cd0 CR3=000000000e782000 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=2038303a35343a3530203132206e754a XMM01=73732878696e755f6d6170203a5d3633 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3633325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038303a35343a3530203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000