syzkaller login: [ 29.321053] BUG: Bad rss-counter state mm:00000000a22e8289 type:MM_FILEPAGES val:33 [ 29.323418] BUG: Bad rss-counter state mm:00000000a22e8289 type:MM_ANONPAGES val:22 [ 29.488016] ================================================================== [ 29.488927] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.489889] Read of size 8 at addr ffff8880183d2798 by task sshd/221 [ 29.490755] [ 29.490985] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 29.491851] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.492833] Call Trace: [ 29.493171] <TASK> [ 29.493455] dump_stack_lvl+0x91/0xf0 [ 29.493942] print_report+0xcc/0x620 [ 29.494433] ? __virt_addr_valid+0x102/0x340 [ 29.494991] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.495603] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.496218] kasan_report+0xbe/0xf0 [ 29.496696] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.497354] vma_interval_tree_remove+0xc75/0xec0 [ 29.497984] vma_prepare+0xc54/0x11a0 [ 29.498481] __split_vma+0x5af/0x950 [ 29.498975] ? __pfx___split_vma+0x10/0x10 [ 29.499522] ? find_held_lock+0x2c/0x110 [ 29.500064] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.500658] ? lock_is_held_type+0x9f/0x120 [ 29.501239] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.501869] ? mtree_range_walk+0x632/0x900 [ 29.502444] ? mas_walk+0x5c7/0x7c0 [ 29.502943] do_vmi_munmap+0x1f1/0x2b0 [ 29.503456] mmap_region+0x1f9/0x2660 [ 29.503965] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.504501] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.505267] ? __pfx_lock_acquire+0x10/0x10 [ 29.505821] ? __pfx_mmap_region+0x10/0x10 [ 29.506372] ? security_mmap_addr+0x7d/0xa0 [ 29.506932] ? get_unmapped_area+0x1f5/0x3f0 [ 29.507511] do_mmap+0x854/0xf00 [ 29.507980] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.508492] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.509085] ksys_mmap_pgoff+0x3af/0x500 [ 29.509627] do_syscall_64+0x3f/0x90 [ 29.510127] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.510793] RIP: 0033:0x7f1f8a728d82 [ 29.511285] 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 [ 29.513551] RSP: 002b:00007fff9e0049b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.514507] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1f8a728d82 [ 29.515390] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1f89b62000 [ 29.516271] RBP: 00007f1f89b62000 R08: 0000000000000009 R09: 0000000000001000 [ 29.517174] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559613780b20 [ 29.518067] R13: 00007fff9e0049d0 R14: 00007fff9e004a00 R15: 00007fff9e004d60 [ 29.518961] </TASK> [ 29.519263] [ 29.519490] Allocated by task 214: [ 29.519950] kasan_save_stack+0x22/0x50 [ 29.520479] kasan_set_track+0x25/0x30 [ 29.521000] __kasan_slab_alloc+0x59/0x70 [ 29.521568] kmem_cache_alloc+0x16b/0x370 [ 29.522112] vm_area_dup+0x20/0x160 [ 29.522581] __split_vma+0x170/0x950 [ 29.523070] split_vma+0xc6/0x110 [ 29.523530] mprotect_fixup+0x8d2/0xb30 [ 29.524063] do_mprotect_pkey+0x87e/0xd40 [ 29.524608] __x64_sys_mprotect+0x78/0xc0 [ 29.525159] do_syscall_64+0x3f/0x90 [ 29.525660] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.526327] [ 29.526551] Freed by task 214: [ 29.526982] kasan_save_stack+0x22/0x50 [ 29.527509] kasan_set_track+0x25/0x30 [ 29.528025] kasan_save_free_info+0x2b/0x50 [ 29.528581] __kasan_slab_free+0x10a/0x190 [ 29.529162] kmem_cache_free+0x10d/0x4d0 [ 29.529705] rcu_core+0x8c8/0x2860 [ 29.530170] __do_softirq+0x1b7/0x7d4 [ 29.530664] [ 29.530886] Last potentially related work creation: [ 29.531554] kasan_save_stack+0x22/0x50 [ 29.532061] __kasan_record_aux_stack+0x8e/0xa0 [ 29.532642] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.533329] remove_vma+0x139/0x170 [ 29.533779] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.534344] do_vmi_munmap+0x1f1/0x2b0 [ 29.534839] __vm_munmap+0x138/0x3a0 [ 29.535307] __x64_sys_munmap+0x59/0x80 [ 29.535804] do_syscall_64+0x3f/0x90 [ 29.536282] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.536925] [ 29.537153] The buggy address belongs to the object at ffff8880183d2740 [ 29.537153] which belongs to the cache vm_area_struct of size 168 [ 29.538635] The buggy address is located 88 bytes inside of [ 29.538635] freed 168-byte region [ffff8880183d2740, ffff8880183d27e8) [ 29.540044] [ 29.540268] The buggy address belongs to the physical page: [ 29.540935] page:00000000248e781f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x183d2 [ 29.542050] memcg:ffff888019f7aa01 [ 29.542477] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.543122] page_type: 0xffffffff() [ 29.543574] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 29.544485] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019f7aa01 [ 29.545400] page dumped because: kasan: bad access detected [ 29.546062] [ 29.546276] Memory state around the buggy address: [ 29.546861] ffff8880183d2680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 29.547718] ffff8880183d2700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 29.548576] >ffff8880183d2780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 29.549440] ^ [ 29.549940] ffff8880183d2800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 29.550795] ffff8880183d2880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 29.551646] ================================================================== [ 29.552618] Disabling lock debugging due to kernel taint [ 31.464800] BUG: Bad rss-counter state mm:000000002641fbbf type:MM_FILEPAGES val:33 [ 31.465567] BUG: Bad rss-counter state mm:000000002641fbbf type:MM_ANONPAGES val:22 [ 31.911028] BUG: Bad rss-counter state mm:00000000c4ae75e1 type:MM_FILEPAGES val:33 [ 31.912338] BUG: Bad rss-counter state mm:00000000c4ae75e1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:25132' (ECDSA) to the list of known hosts. 2023/06/19 21:20:29 fuzzer started 2023/06/19 21:20:29 dialing manager at localhost:44161 2023/06/19 21:20:29 checking machine... 2023/06/19 21:20:29 checking revisions... [ 32.625607] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:20:29 testing simple program... [ 32.669142] cgroup: Unknown subsys name 'net' [ 32.733441] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:20:28 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffea0000672c18 RCX=0000000000000003 RDX=1ffffd40000ce54a RSI=0000000000000008 RDI=ffffea0000672a51 RBP=dffffc0000000000 RSP=ffff888018037230 R8 =0000000000000000 R9 =fffff940000ce540 R10=ffffea0000672a07 R11=00000000000b6996 R12=ffffea0000672a00 R13=ffffea0000672bc0 R14=ffffea0000672a58 R15=dead000000000400 RIP=ffffffff8178ccf8 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 00007fd5c8739900 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=00007fd5c8cf0618 CR3=000000000edc8000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a 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=00007fb1962492b0 CR3=0000000015b56000 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=2039323a30323a3132203931206e754a XMM01=73732878696e755f6d6170203a5d3133 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3133325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038323a30323a3132203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000