syzkaller login: [ 30.858353] BUG: Bad rss-counter state mm:0000000068c7860a type:MM_FILEPAGES val:33 [ 30.860004] BUG: Bad rss-counter state mm:0000000068c7860a type:MM_ANONPAGES val:22 [ 31.033933] ================================================================== [ 31.035096] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.036520] Read of size 8 at addr ffff888017f46798 by task sshd/221 [ 31.037364] [ 31.037589] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.038492] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.039537] Call Trace: [ 31.039878] [ 31.040181] dump_stack_lvl+0x91/0xf0 [ 31.040695] print_report+0xcc/0x620 [ 31.041204] ? __virt_addr_valid+0x102/0x340 [ 31.041781] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.042424] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.043074] kasan_report+0xbe/0xf0 [ 31.043581] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.044241] vma_interval_tree_remove+0xc75/0xec0 [ 31.044874] vma_prepare+0xc54/0x11a0 [ 31.045380] __split_vma+0x5af/0x950 [ 31.045873] ? __pfx___split_vma+0x10/0x10 [ 31.046423] ? find_held_lock+0x2c/0x110 [ 31.046987] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.047630] ? lock_is_held_type+0x9f/0x120 [ 31.048200] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.048841] ? mtree_range_walk+0x632/0x900 [ 31.049439] ? mas_walk+0x5c7/0x7c0 [ 31.049942] do_vmi_munmap+0x1f1/0x2b0 [ 31.050458] mmap_region+0x1f9/0x2660 [ 31.050979] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.051528] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.052286] ? __pfx_lock_acquire+0x10/0x10 [ 31.052854] ? __pfx_mmap_region+0x10/0x10 [ 31.053416] ? security_mmap_addr+0x7d/0xa0 [ 31.053973] ? get_unmapped_area+0x1f5/0x3f0 [ 31.054560] do_mmap+0x854/0xf00 [ 31.055025] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.055582] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.056190] ksys_mmap_pgoff+0x3af/0x500 [ 31.056727] do_syscall_64+0x3f/0x90 [ 31.057253] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.057943] RIP: 0033:0x7f963b6e6d82 [ 31.058423] 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 [ 31.060723] RSP: 002b:00007ffeae523b48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.061694] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f963b6e6d82 [ 31.062602] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f963ab20000 [ 31.063525] RBP: 00007f963ab20000 R08: 0000000000000009 R09: 0000000000001000 [ 31.064418] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562de8d62ec0 [ 31.065315] R13: 00007ffeae523b60 R14: 00007ffeae523b90 R15: 00007ffeae523ef0 [ 31.066218] [ 31.066528] [ 31.066754] Allocated by task 214: [ 31.067204] kasan_save_stack+0x22/0x50 [ 31.067757] kasan_set_track+0x25/0x30 [ 31.068274] __kasan_slab_alloc+0x59/0x70 [ 31.068824] kmem_cache_alloc+0x16b/0x370 [ 31.069373] vm_area_dup+0x20/0x160 [ 31.069849] __split_vma+0x170/0x950 [ 31.070337] split_vma+0xc6/0x110 [ 31.070793] mprotect_fixup+0x8d2/0xb30 [ 31.071334] do_mprotect_pkey+0x87e/0xd40 [ 31.071884] __x64_sys_mprotect+0x78/0xc0 [ 31.072427] do_syscall_64+0x3f/0x90 [ 31.072922] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.073601] [ 31.073830] Freed by task 214: [ 31.074248] kasan_save_stack+0x22/0x50 [ 31.074789] kasan_set_track+0x25/0x30 [ 31.075345] kasan_save_free_info+0x2b/0x50 [ 31.075922] __kasan_slab_free+0x10a/0x190 [ 31.076505] kmem_cache_free+0x10d/0x4d0 [ 31.077052] rcu_core+0x8c8/0x2860 [ 31.077604] __do_softirq+0x1b7/0x7d4 [ 31.078129] [ 31.078368] Last potentially related work creation: [ 31.078993] kasan_save_stack+0x22/0x50 [ 31.079537] __kasan_record_aux_stack+0x8e/0xa0 [ 31.080148] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.080832] remove_vma+0x139/0x170 [ 31.081311] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.081914] do_vmi_munmap+0x1f1/0x2b0 [ 31.082428] __vm_munmap+0x138/0x3a0 [ 31.082934] __x64_sys_munmap+0x59/0x80 [ 31.083472] do_syscall_64+0x3f/0x90 [ 31.083975] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.084680] [ 31.084915] The buggy address belongs to the object at ffff888017f46740 [ 31.084915] which belongs to the cache vm_area_struct of size 168 [ 31.086522] The buggy address is located 88 bytes inside of [ 31.086522] freed 168-byte region [ffff888017f46740, ffff888017f467e8) [ 31.087999] [ 31.088225] The buggy address belongs to the physical page: [ 31.088880] page:0000000065a8f340 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x17f46 [ 31.089968] memcg:ffff88800ca87701 [ 31.090392] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.091032] page_type: 0xffffffff() [ 31.091503] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.092412] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ca87701 [ 31.093313] page dumped because: kasan: bad access detected [ 31.093963] [ 31.094184] Memory state around the buggy address: [ 31.094757] ffff888017f46680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.095636] ffff888017f46700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.096724] >ffff888017f46780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.097801] ^ [ 31.098432] ffff888017f46800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.099541] ffff888017f46880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.100623] ================================================================== [ 31.101800] Disabling lock debugging due to kernel taint [ 33.670437] BUG: Bad rss-counter state mm:000000003c980794 type:MM_FILEPAGES val:33 [ 33.671455] BUG: Bad rss-counter state mm:000000003c980794 type:MM_ANONPAGES val:22 [ 34.215063] BUG: Bad rss-counter state mm:00000000a2667354 type:MM_FILEPAGES val:33 [ 34.216238] BUG: Bad rss-counter state mm:00000000a2667354 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:42624' (ECDSA) to the list of known hosts. 2023/06/20 12:08:04 fuzzer started 2023/06/20 12:08:04 dialing manager at localhost:36067 2023/06/20 12:08:04 checking machine... 2023/06/20 12:08:04 checking revisions... [ 34.888406] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:08:04 testing simple program... [ 34.943695] cgroup: Unknown subsys name 'net' [ 34.995063] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:08:03 Registers: info registers vcpu 0 RAX=ffffffff813ad720 RBX=ffffffff813ad470 RCX=ffff88801680fa48 RDX=1ffff11002d01f40 RSI=ffffffff813ad720 RDI=ffff88801680fa70 RBP=ffff88801680fa40 RSP=ffff88801680f998 R8 =0000000000000001 R9 =ffff88801680f9e8 R10=0000000000038001 R11=0000000000003c0d R12=ffff88801680fa70 R13=0000000000000000 R14=ffff888019f41b40 R15=0000000000000cc0 RIP=ffffffff84538446 RFL=00000282 [--S----] 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 00007f8dae821900 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=00007ffc40554000 CR3=000000000e5f0000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000001758321b38 RBX=0000000000000000 RCX=00000000000006e0 RDX=0000000000000017 RSI=ffff88806cf28140 RDI=00000000000542c6 RBP=ffff88806cf28140 RSP=ffff88806cf09ee0 R8 =0000000000000007 R9 =0000000000000000 R10=00000000000f0f28 R11=0000001757ffd4e0 R12=00000000000542c6 R13=0000000000000000 R14=0000000000000000 R15=ffff88806cf2b940 RIP=ffffffff81106295 RFL=00000016 [----AP-] 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 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=00007f61561d6e10 CR3=000000000c594000 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=2033303a38303a3231203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033303a38303a3231203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000