syzkaller login: [ 44.094167] BUG: Bad rss-counter state mm:0000000052c47621 type:MM_FILEPAGES val:33 [ 44.095214] BUG: Bad rss-counter state mm:0000000052c47621 type:MM_ANONPAGES val:22 [ 44.257170] ================================================================== [ 44.258754] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 44.259945] Read of size 8 at addr ffff888018edc3f8 by task sshd/220 [ 44.260942] [ 44.261225] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 44.262191] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 44.263182] Call Trace: [ 44.263503] [ 44.263788] dump_stack_lvl+0x91/0xf0 [ 44.264295] print_report+0xcc/0x620 [ 44.264775] ? __virt_addr_valid+0x102/0x340 [ 44.265365] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.266003] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.266624] kasan_report+0xbe/0xf0 [ 44.267127] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.267764] vma_interval_tree_remove+0xc75/0xec0 [ 44.268397] vma_prepare+0xc54/0x11a0 [ 44.268890] __split_vma+0x5af/0x950 [ 44.269422] ? __pfx___split_vma+0x10/0x10 [ 44.269984] ? find_held_lock+0x2c/0x110 [ 44.270516] do_vmi_align_munmap+0x2ba/0x11f0 [ 44.271102] ? lock_is_held_type+0x9f/0x120 [ 44.271652] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 44.272273] ? mtree_range_walk+0x632/0x900 [ 44.272828] ? mas_walk+0x5c7/0x7c0 [ 44.273342] do_vmi_munmap+0x1f1/0x2b0 [ 44.273849] mmap_region+0x1f9/0x2660 [ 44.274345] ? vm_mmap_pgoff+0x15c/0x3a0 [ 44.274859] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 44.275598] ? __pfx_lock_acquire+0x10/0x10 [ 44.276154] ? __pfx_mmap_region+0x10/0x10 [ 44.276697] ? security_mmap_addr+0x7d/0xa0 [ 44.277260] ? get_unmapped_area+0x1f5/0x3f0 [ 44.277847] do_mmap+0x854/0xf00 [ 44.278305] vm_mmap_pgoff+0x1a6/0x3a0 [ 44.278812] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 44.279412] ksys_mmap_pgoff+0x3af/0x500 [ 44.279949] do_syscall_64+0x3f/0x90 [ 44.280432] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.281120] RIP: 0033:0x7fac305ead82 [ 44.281593] 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 [ 44.283772] RSP: 002b:00007ffd6e8a5d68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 44.284694] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fac305ead82 [ 44.285604] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fac2fa24000 [ 44.286475] RBP: 00007fac2fa24000 R08: 0000000000000009 R09: 0000000000001000 [ 44.287346] R10: 0000000000000812 R11: 0000000000000206 R12: 000055921fbf4ec0 [ 44.288207] R13: 00007ffd6e8a5d80 R14: 00007ffd6e8a5db0 R15: 00007ffd6e8a6110 [ 44.289095] [ 44.289402] [ 44.289621] Allocated by task 213: [ 44.290070] kasan_save_stack+0x22/0x50 [ 44.290582] kasan_set_track+0x25/0x30 [ 44.291086] __kasan_slab_alloc+0x59/0x70 [ 44.291611] kmem_cache_alloc+0x16b/0x370 [ 44.292146] vm_area_dup+0x20/0x160 [ 44.292617] __split_vma+0x170/0x950 [ 44.293110] split_vma+0xc6/0x110 [ 44.293567] mprotect_fixup+0x8d2/0xb30 [ 44.294098] do_mprotect_pkey+0x87e/0xd40 [ 44.294631] __x64_sys_mprotect+0x78/0xc0 [ 44.295255] do_syscall_64+0x3f/0x90 [ 44.295885] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.296575] [ 44.296796] Freed by task 213: [ 44.297214] kasan_save_stack+0x22/0x50 [ 44.297736] kasan_set_track+0x25/0x30 [ 44.298262] kasan_save_free_info+0x2b/0x50 [ 44.298805] __kasan_slab_free+0x10a/0x190 [ 44.299430] kmem_cache_free+0x10d/0x4d0 [ 44.299965] rcu_core+0x8c8/0x2860 [ 44.300420] __do_softirq+0x1b7/0x7d4 [ 44.300905] [ 44.301131] Last potentially related work creation: [ 44.301727] kasan_save_stack+0x22/0x50 [ 44.302259] __kasan_record_aux_stack+0x8e/0xa0 [ 44.302840] __call_rcu_common.constprop.0+0x6a/0xb90 [ 44.303499] remove_vma+0x139/0x170 [ 44.303965] do_vmi_align_munmap+0xd4a/0x11f0 [ 44.304528] do_vmi_munmap+0x1f1/0x2b0 [ 44.305031] __vm_munmap+0x138/0x3a0 [ 44.305511] __x64_sys_munmap+0x59/0x80 [ 44.306037] do_syscall_64+0x3f/0x90 [ 44.306512] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.307174] [ 44.307389] Second to last potentially related work creation: [ 44.308087] kasan_save_stack+0x22/0x50 [ 44.308594] __kasan_record_aux_stack+0x8e/0xa0 [ 44.309192] __call_rcu_common.constprop.0+0x6a/0xb90 [ 44.309862] remove_vma+0x139/0x170 [ 44.310351] do_vmi_align_munmap+0xd4a/0x11f0 [ 44.310925] do_vmi_munmap+0x1f1/0x2b0 [ 44.311418] mmap_region+0x1f9/0x2660 [ 44.311903] do_mmap+0x854/0xf00 [ 44.312349] vm_mmap_pgoff+0x1a6/0x3a0 [ 44.312835] ksys_mmap_pgoff+0x3af/0x500 [ 44.313364] do_syscall_64+0x3f/0x90 [ 44.313840] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.314510] [ 44.314730] The buggy address belongs to the object at ffff888018edc3a0 [ 44.314730] which belongs to the cache vm_area_struct of size 168 [ 44.316230] The buggy address is located 88 bytes inside of [ 44.316230] freed 168-byte region [ffff888018edc3a0, ffff888018edc448) [ 44.317677] [ 44.317892] The buggy address belongs to the physical page: [ 44.318578] page:00000000f2ab6d00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18edc [ 44.319692] memcg:ffff88800dfa9001 [ 44.320136] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 44.320851] page_type: 0xffffffff() [ 44.321350] raw: 0100000000000200 ffff88800879fc80 ffffea00003a07c0 dead000000000003 [ 44.322312] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dfa9001 [ 44.323242] page dumped because: kasan: bad access detected [ 44.323904] [ 44.324132] Memory state around the buggy address: [ 44.324726] ffff888018edc280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 44.325609] ffff888018edc300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 44.326488] >ffff888018edc380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 44.327361] ^ [ 44.328221] ffff888018edc400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 44.329095] ffff888018edc480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 44.329983] ================================================================== [ 44.330976] Disabling lock debugging due to kernel taint [ 46.572003] BUG: Bad rss-counter state mm:000000004343e048 type:MM_FILEPAGES val:33 [ 46.573237] BUG: Bad rss-counter state mm:000000004343e048 type:MM_ANONPAGES val:22 [ 47.009248] BUG: Bad rss-counter state mm:0000000034c18b0f type:MM_FILEPAGES val:33 [ 47.010548] BUG: Bad rss-counter state mm:0000000034c18b0f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:3244' (ECDSA) to the list of known hosts. 2023/06/19 14:28:57 fuzzer started 2023/06/19 14:28:57 dialing manager at localhost:44161 2023/06/19 14:28:57 checking machine... 2023/06/19 14:28:57 checking revisions... [ 47.707934] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:28:57 testing simple program... [ 47.752204] cgroup: Unknown subsys name 'net' [ 47.794521] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:28:51 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000002 RCX=ffffffff86141c60 RDX=0000000000000001 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88806ce09ad0 RSP=ffff88806ce09a08 R8 =ffffffff86141c64 R9 =ffff88806ce09ab8 R10=0000000000038001 R11=000000000002296b R12=ffff88806ce09ad8 R13=ffff88806ce09ac0 R14=ffff88806ce09e68 R15=ffff88806ce09a78 RIP=ffffffff81131153 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 00007f8c5187d900 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=00007ffd43f80000 CR3=000000000d9ea000 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=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007fb977627020 CR3=0000000019d54000 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=2036353a38323a3431203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036353a38323a3431203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000