syzkaller login: [ 31.918799] BUG: Bad rss-counter state mm:0000000056eedc81 type:MM_FILEPAGES val:33 [ 31.919578] BUG: Bad rss-counter state mm:0000000056eedc81 type:MM_ANONPAGES val:22 [ 32.048319] ================================================================== [ 32.049504] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.050679] Read of size 8 at addr ffff88801a283c20 by task sshd/219 [ 32.051645] [ 32.052030] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.053127] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.054159] Call Trace: [ 32.054405] [ 32.054623] dump_stack_lvl+0x91/0xf0 [ 32.055008] print_report+0xcc/0x620 [ 32.055377] ? __virt_addr_valid+0x102/0x340 [ 32.055801] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.056278] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.056783] kasan_report+0xbe/0xf0 [ 32.057153] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.057629] vma_interval_tree_remove+0xc75/0xec0 [ 32.058096] vma_prepare+0xc54/0x11a0 [ 32.058465] __split_vma+0x5af/0x950 [ 32.058829] ? __pfx___split_vma+0x10/0x10 [ 32.059245] ? find_held_lock+0x2c/0x110 [ 32.059648] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.060090] ? lock_is_held_type+0x9f/0x120 [ 32.060509] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.060989] ? mtree_range_walk+0x632/0x900 [ 32.061414] ? mas_walk+0x5c7/0x7c0 [ 32.061779] do_vmi_munmap+0x1f1/0x2b0 [ 32.062161] mmap_region+0x1f9/0x2660 [ 32.062528] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.062920] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.063473] ? __pfx_lock_acquire+0x10/0x10 [ 32.063884] ? __pfx_mmap_region+0x10/0x10 [ 32.064295] ? security_mmap_addr+0x7d/0xa0 [ 32.064729] ? get_unmapped_area+0x1f5/0x3f0 [ 32.065157] do_mmap+0x854/0xf00 [ 32.065497] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.065878] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.066313] ksys_mmap_pgoff+0x3af/0x500 [ 32.066704] do_syscall_64+0x3f/0x90 [ 32.067076] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.067571] RIP: 0033:0x7fea878f0d82 [ 32.067934] 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 [ 32.069594] RSP: 002b:00007ffd67996868 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.070295] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fea878f0d82 [ 32.070949] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fea86d2a000 [ 32.071603] RBP: 00007fea86d2a000 R08: 0000000000000009 R09: 0000000000001000 [ 32.072260] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fb30941ec0 [ 32.072923] R13: 00007ffd67996880 R14: 00007ffd679968b0 R15: 00007ffd67996c10 [ 32.073584] [ 32.073817] [ 32.073981] Allocated by task 212: [ 32.074315] kasan_save_stack+0x22/0x50 [ 32.074702] kasan_set_track+0x25/0x30 [ 32.075084] __kasan_slab_alloc+0x59/0x70 [ 32.075496] kmem_cache_alloc+0x16b/0x370 [ 32.075896] vm_area_dup+0x20/0x160 [ 32.076247] __split_vma+0x170/0x950 [ 32.076607] split_vma+0xc6/0x110 [ 32.076966] mprotect_fixup+0x8d2/0xb30 [ 32.077354] do_mprotect_pkey+0x87e/0xd40 [ 32.077757] __x64_sys_mprotect+0x78/0xc0 [ 32.078156] do_syscall_64+0x3f/0x90 [ 32.078525] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.079022] [ 32.079188] Freed by task 212: [ 32.079492] kasan_save_stack+0x22/0x50 [ 32.079882] kasan_set_track+0x25/0x30 [ 32.080270] kasan_save_free_info+0x2b/0x50 [ 32.080688] __kasan_slab_free+0x10a/0x190 [ 32.081096] kmem_cache_free+0x10d/0x4d0 [ 32.081484] rcu_core+0x8c8/0x2860 [ 32.081828] __do_softirq+0x1b7/0x7d4 [ 32.082197] [ 32.082364] Last potentially related work creation: [ 32.082824] kasan_save_stack+0x22/0x50 [ 32.083210] __kasan_record_aux_stack+0x8e/0xa0 [ 32.083651] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.084146] remove_vma+0x139/0x170 [ 32.084496] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.084936] do_vmi_munmap+0x1f1/0x2b0 [ 32.085311] __vm_munmap+0x138/0x3a0 [ 32.085673] __x64_sys_munmap+0x59/0x80 [ 32.086053] do_syscall_64+0x3f/0x90 [ 32.086421] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.086924] [ 32.087090] The buggy address belongs to the object at ffff88801a283bc8 [ 32.087090] which belongs to the cache vm_area_struct of size 168 [ 32.088236] The buggy address is located 88 bytes inside of [ 32.088236] freed 168-byte region [ffff88801a283bc8, ffff88801a283c70) [ 32.089340] [ 32.089504] The buggy address belongs to the physical page: [ 32.090015] page:000000004241e829 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a283 [ 32.090859] memcg:ffff88800cb7ed01 [ 32.091191] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.091685] page_type: 0xffffffff() [ 32.092034] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.092744] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cb7ed01 [ 32.093514] page dumped because: kasan: bad access detected [ 32.094025] [ 32.094190] Memory state around the buggy address: [ 32.094634] ffff88801a283b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.095293] ffff88801a283b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 32.095952] >ffff88801a283c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 32.096607] ^ [ 32.097031] ffff88801a283c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 32.097690] ffff88801a283d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 32.098346] ================================================================== [ 32.099083] Disabling lock debugging due to kernel taint [ 34.672418] BUG: Bad rss-counter state mm:000000005bac136b type:MM_FILEPAGES val:33 [ 34.672928] BUG: Bad rss-counter state mm:000000005bac136b type:MM_ANONPAGES val:22 [ 35.083802] BUG: Bad rss-counter state mm:00000000a0bc4f45 type:MM_FILEPAGES val:33 [ 35.084410] BUG: Bad rss-counter state mm:00000000a0bc4f45 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:28972' (ECDSA) to the list of known hosts. 2023/06/20 07:06:38 fuzzer started 2023/06/20 07:06:38 dialing manager at localhost:44161 2023/06/20 07:06:38 checking machine... 2023/06/20 07:06:38 checking revisions... [ 35.687908] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:06:38 testing simple program... [ 35.739469] cgroup: Unknown subsys name 'net' [ 35.790782] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:06:37 Registers: info registers vcpu 0 RAX=0000000000000007 RBX=ffffffff85dbc1f4 RCX=ffffffff813ad6cf RDX=0000000000000000 RSI=ffffffff860d68c0 RDI=ffffffff85dbc1cc RBP=ffffffff85dbc1f4 RSP=ffff888008d7f898 R8 =ffffffff860d68c0 R9 =ffff888008d7f990 R10=0000000000038001 R11=0000000000010b7e R12=ffffffff85dbc1f4 R13=ffffffff85dbc1cc R14=ffffffff85dbc1f0 R15=dffffc0000000000 RIP=ffffffff8112fc8e 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 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=00007f6f3ae76520 CR3=000000000da7a000 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=2037333a36303a3730203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037333a36303a3730203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffed1001d73ef0 RCX=0000000000000000 RDX=0000000000000001 RSI=0000000000000040 RDI=ffff88800eb9f810 RBP=ffffffff844a85be RSP=ffff88800eb9f780 R8 =0000000000000200 R9 =0000000000000000 R10=ffffed1001d9c940 R11=00000000000b6996 R12=0000000000000000 R13=ffff8880084c6140 R14=ffffffff844a85be R15=0000000000000000 RIP=ffffffff813ad690 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 00007f9f9f625900 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=00007f9f9f5ea008 CR3=000000000ca08000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000