syzkaller login: [ 30.940759] BUG: Bad rss-counter state mm:00000000a4f6ff05 type:MM_FILEPAGES val:33 [ 30.941592] BUG: Bad rss-counter state mm:00000000a4f6ff05 type:MM_ANONPAGES val:22 [ 31.057226] ================================================================== [ 31.057877] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.058579] Read of size 8 at addr ffff88800dd075c8 by task sshd/222 [ 31.059133] [ 31.059298] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.059894] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.060603] Call Trace: [ 31.060821] [ 31.061015] dump_stack_lvl+0x91/0xf0 [ 31.061431] print_report+0xcc/0x620 [ 31.061756] ? __virt_addr_valid+0x102/0x340 [ 31.062134] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.062558] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.062976] kasan_report+0xbe/0xf0 [ 31.063359] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.063784] vma_interval_tree_remove+0xc75/0xec0 [ 31.064246] vma_prepare+0xc54/0x11a0 [ 31.064571] __split_vma+0x5af/0x950 [ 31.064900] ? __pfx___split_vma+0x10/0x10 [ 31.065264] ? find_held_lock+0x2c/0x110 [ 31.065626] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.066001] ? lock_is_held_type+0x9f/0x120 [ 31.066363] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.066790] ? mtree_range_walk+0x632/0x900 [ 31.067182] ? mas_walk+0x5c7/0x7c0 [ 31.067509] do_vmi_munmap+0x1f1/0x2b0 [ 31.067851] mmap_region+0x1f9/0x2660 [ 31.068219] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.068572] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.069060] ? __pfx_lock_acquire+0x10/0x10 [ 31.069435] ? __pfx_mmap_region+0x10/0x10 [ 31.069806] ? security_mmap_addr+0x7d/0xa0 [ 31.070178] ? get_unmapped_area+0x1f5/0x3f0 [ 31.070558] do_mmap+0x854/0xf00 [ 31.070860] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.071205] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.071590] ksys_mmap_pgoff+0x3af/0x500 [ 31.071935] do_syscall_64+0x3f/0x90 [ 31.072294] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.072748] RIP: 0033:0x7f43a269ad82 [ 31.073059] 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 [ 31.074524] RSP: 002b:00007ffffbaf8308 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.075151] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f43a269ad82 [ 31.075728] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f43a1ad4000 [ 31.076328] RBP: 00007f43a1ad4000 R08: 0000000000000009 R09: 0000000000001000 [ 31.076902] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559132699b20 [ 31.077475] R13: 00007ffffbaf8320 R14: 00007ffffbaf8350 R15: 00007ffffbaf86b0 [ 31.078058] [ 31.078264] [ 31.078413] Allocated by task 215: [ 31.078713] kasan_save_stack+0x22/0x50 [ 31.079072] kasan_set_track+0x25/0x30 [ 31.079409] __kasan_slab_alloc+0x59/0x70 [ 31.079773] kmem_cache_alloc+0x16b/0x370 [ 31.080126] vm_area_dup+0x20/0x160 [ 31.080463] __split_vma+0x170/0x950 [ 31.080775] split_vma+0xc6/0x110 [ 31.081066] mprotect_fixup+0x8d2/0xb30 [ 31.081410] do_mprotect_pkey+0x87e/0xd40 [ 31.081766] __x64_sys_mprotect+0x78/0xc0 [ 31.082123] do_syscall_64+0x3f/0x90 [ 31.082453] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.082891] [ 31.083034] Freed by task 13: [ 31.083293] kasan_save_stack+0x22/0x50 [ 31.083633] kasan_set_track+0x25/0x30 [ 31.083976] kasan_save_free_info+0x2b/0x50 [ 31.084371] __kasan_slab_free+0x10a/0x190 [ 31.084734] kmem_cache_free+0x10d/0x4d0 [ 31.085081] rcu_core+0x8c8/0x2860 [ 31.085406] __do_softirq+0x1b7/0x7d4 [ 31.085740] [ 31.085890] Last potentially related work creation: [ 31.086306] kasan_save_stack+0x22/0x50 [ 31.086650] __kasan_record_aux_stack+0x8e/0xa0 [ 31.087037] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.087475] remove_vma+0x139/0x170 [ 31.087773] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.088176] do_vmi_munmap+0x1f1/0x2b0 [ 31.088490] __vm_munmap+0x138/0x3a0 [ 31.088814] __x64_sys_munmap+0x59/0x80 [ 31.089161] do_syscall_64+0x3f/0x90 [ 31.089497] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.089940] [ 31.090089] The buggy address belongs to the object at ffff88800dd07570 [ 31.090089] which belongs to the cache vm_area_struct of size 168 [ 31.091129] The buggy address is located 88 bytes inside of [ 31.091129] freed 168-byte region [ffff88800dd07570, ffff88800dd07618) [ 31.092104] [ 31.092271] The buggy address belongs to the physical page: [ 31.092733] page:000000008bd037cb refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdd07 [ 31.093492] memcg:ffff88800ea2d301 [ 31.093793] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.094254] page_type: 0xffffffff() [ 31.094577] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.095249] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ea2d301 [ 31.095882] page dumped because: kasan: bad access detected [ 31.096368] [ 31.096516] Memory state around the buggy address: [ 31.096921] ffff88800dd07480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.097523] ffff88800dd07500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 31.098155] >ffff88800dd07580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.098796] ^ [ 31.099297] ffff88800dd07600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.099891] ffff88800dd07680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.100520] ================================================================== [ 31.101269] Disabling lock debugging due to kernel taint [ 32.889309] BUG: Bad rss-counter state mm:0000000064a2b3d1 type:MM_FILEPAGES val:33 [ 32.890028] BUG: Bad rss-counter state mm:0000000064a2b3d1 type:MM_ANONPAGES val:22 [ 33.197991] BUG: Bad rss-counter state mm:00000000dc53952a type:MM_FILEPAGES val:33 [ 33.198695] BUG: Bad rss-counter state mm:00000000dc53952a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:51122' (ECDSA) to the list of known hosts. 2023/06/21 09:06:19 fuzzer started 2023/06/21 09:06:19 dialing manager at localhost:36067 2023/06/21 09:06:19 checking machine... 2023/06/21 09:06:19 checking revisions... [ 33.783280] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:06:19 testing simple program... [ 33.818274] cgroup: Unknown subsys name 'net' [ 33.850163] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:06:19 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007fdfbfba2890 CR3=0000000016896000 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=36303a3930203132206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3133325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323938 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff11001bdc85f RBX=ffff88800dee42c8 RCX=ffffffff812e0135 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800dee42f8 RBP=ffff8880190f4178 RSP=ffff88806cf09dd8 R8 =0000000000000001 R9 =ffffed100d9e13af R10=0000000000000003 R11=00000000000b6a61 R12=dffffc0000000000 R13=ffff8880190f0bc0 R14=ffffffff813782f8 R15=ffff8880097be400 RIP=ffffffff818464ec RFL=00000046 [---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 00007fc503af4900 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=00007fc503ab9008 CR3=000000000ef80000 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