Debian GNU/Linux 11 syzkaller ttyS0 syzkal[ 62.233291] BUG: Bad rss-counter state mm:00000000e69cf742 type:MM_FILEPAGES val:33 ler login: [ 62.234525] BUG: Bad rss-counter state mm:00000000e69cf742 type:MM_ANONPAGES val:22 [ 62.349367] ================================================================== [ 62.350467] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 62.351583] Read of size 8 at addr ffff888018dc1798 by task sshd/219 [ 62.352404] [ 62.352562] CPU: 1 PID: 219 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 62.353367] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 62.354151] Call Trace: [ 62.354399] [ 62.354619] dump_stack_lvl+0x91/0xf0 [ 62.354998] print_report+0xcc/0x620 [ 62.355377] ? __virt_addr_valid+0x102/0x340 [ 62.355823] ? vma_interval_tree_remove+0xc75/0xec0 [ 62.356322] ? vma_interval_tree_remove+0xc75/0xec0 [ 62.356808] kasan_report+0xbe/0xf0 [ 62.357193] ? vma_interval_tree_remove+0xc75/0xec0 [ 62.357714] vma_interval_tree_remove+0xc75/0xec0 [ 62.358205] vma_prepare+0xc54/0x11a0 [ 62.358578] __split_vma+0x5af/0x950 [ 62.358949] ? __pfx___split_vma+0x10/0x10 [ 62.359356] ? find_held_lock+0x2c/0x110 [ 62.359763] do_vmi_align_munmap+0x2ba/0x11f0 [ 62.360209] ? lock_is_held_type+0x9f/0x120 [ 62.360627] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 62.361101] ? mtree_range_walk+0x632/0x900 [ 62.361549] ? mas_walk+0x5c7/0x7c0 [ 62.361921] do_vmi_munmap+0x1f1/0x2b0 [ 62.362285] mmap_region+0x1f9/0x2660 [ 62.362652] ? vm_mmap_pgoff+0x15c/0x3a0 [ 62.363029] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 62.363559] ? __pfx_lock_acquire+0x10/0x10 [ 62.363954] ? __pfx_mmap_region+0x10/0x10 [ 62.364341] ? security_mmap_addr+0x7d/0xa0 [ 62.364732] ? get_unmapped_area+0x1f5/0x3f0 [ 62.365144] do_mmap+0x854/0xf00 [ 62.365474] vm_mmap_pgoff+0x1a6/0x3a0 [ 62.365839] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 62.366254] ksys_mmap_pgoff+0x3af/0x500 [ 62.366621] do_syscall_64+0x3f/0x90 [ 62.366976] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 62.367456] RIP: 0033:0x7f902e162d82 [ 62.367791] 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 [ 62.369402] RSP: 002b:00007ffce8219758 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 62.370092] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f902e162d82 [ 62.370769] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f902d59c000 [ 62.371438] RBP: 00007f902d59c000 R08: 0000000000000009 R09: 0000000000001000 [ 62.372092] R10: 0000000000000812 R11: 0000000000000206 R12: 000055606c36bd90 [ 62.372744] R13: 00007ffce8219770 R14: 00007ffce82197a0 R15: 00007ffce8219b00 [ 62.373420] [ 62.373637] [ 62.373793] Allocated by task 212: [ 62.374129] kasan_save_stack+0x22/0x50 [ 62.374524] kasan_set_track+0x25/0x30 [ 62.374898] __kasan_slab_alloc+0x59/0x70 [ 62.375286] kmem_cache_alloc+0x16b/0x370 [ 62.375689] vm_area_dup+0x20/0x160 [ 62.376037] __split_vma+0x170/0x950 [ 62.376389] split_vma+0xc6/0x110 [ 62.376721] mprotect_fixup+0x8d2/0xb30 [ 62.377104] do_mprotect_pkey+0x87e/0xd40 [ 62.377512] __x64_sys_mprotect+0x78/0xc0 [ 62.377896] do_syscall_64+0x3f/0x90 [ 62.378242] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 62.378713] [ 62.378873] Freed by task 212: [ 62.379177] kasan_save_stack+0x22/0x50 [ 62.379558] kasan_set_track+0x25/0x30 [ 62.379922] kasan_save_free_info+0x2b/0x50 [ 62.380311] __kasan_slab_free+0x10a/0x190 [ 62.380705] kmem_cache_free+0x10d/0x4d0 [ 62.381079] rcu_core+0x8c8/0x2860 [ 62.381425] __do_softirq+0x1b7/0x7d4 [ 62.381776] [ 62.381935] Last potentially related work creation: [ 62.382367] kasan_save_stack+0x22/0x50 [ 62.382737] __kasan_record_aux_stack+0x8e/0xa0 [ 62.383165] __call_rcu_common.constprop.0+0x6a/0xb90 [ 62.383635] remove_vma+0x139/0x170 [ 62.383965] do_vmi_align_munmap+0xd4a/0x11f0 [ 62.384376] do_vmi_munmap+0x1f1/0x2b0 [ 62.384735] __vm_munmap+0x138/0x3a0 [ 62.385078] __x64_sys_munmap+0x59/0x80 [ 62.385450] do_syscall_64+0x3f/0x90 [ 62.385797] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 62.386262] [ 62.386433] The buggy address belongs to the object at ffff888018dc1740 [ 62.386433] which belongs to the cache vm_area_struct of size 168 [ 62.387548] The buggy address is located 88 bytes inside of [ 62.387548] freed 168-byte region [ffff888018dc1740, ffff888018dc17e8) [ 62.388617] [ 62.388779] The buggy address belongs to the physical page: [ 62.389275] page:00000000510c369e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18dc1 [ 62.390096] memcg:ffff88800fda7f01 [ 62.390413] flags: 0x100000000000200(slab|node=0|zone=1) [ 62.390904] page_type: 0xffffffff() [ 62.391247] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 62.391918] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fda7f01 [ 62.392528] page dumped because: kasan: bad access detected [ 62.392962] [ 62.393106] Memory state around the buggy address: [ 62.393586] ffff888018dc1680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 62.394152] ffff888018dc1700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 62.394718] >ffff888018dc1780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 62.395281] ^ [ 62.395606] ffff888018dc1800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 62.396164] ffff888018dc1880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 62.396720] ================================================================== [ 62.397387] Disabling lock debugging due to kernel taint [ 64.331913] BUG: Bad rss-counter state mm:00000000db7cfc2f type:MM_FILEPAGES val:33 [ 64.333368] BUG: Bad rss-counter state mm:00000000db7cfc2f type:MM_ANONPAGES val:22 [ 64.817011] BUG: Bad rss-counter state mm:0000000098529688 type:MM_FILEPAGES val:33 [ 64.818261] BUG: Bad rss-counter state mm:0000000098529688 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:8607' (ECDSA) to the list of known hosts. 2023/06/19 20:23:48 fuzzer started 2023/06/19 20:23:48 dialing manager at localhost:44161 2023/06/19 20:23:48 checking machine... 2023/06/19 20:23:48 checking revisions... [ 65.557726] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:23:48 testing simple program... [ 65.600215] cgroup: Unknown subsys name 'net' [ 65.639531] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:23:16 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007f41c5c1c960 CR3=000000000d738000 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=b58bd9988e70c387cc4362574b4a0c88 XMM02=0000000000127360eff9b2d0a8fce9cb XMM03=00000000001274302c67c8bc2e329bc3 XMM04=f3d20a28ed10f4fa00000000000ae988 XMM05=dfcdbad4f1609c37000000000013d4d0 XMM06=dc54618ed56bb3a2000000000013c6a8 XMM07=e042d86d42eb936e000000000012e048 XMM08=04a2a7cf2fbcf24b0000000000127430 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 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=ffff888008c58400 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=00007fcc14c8c618 CR3=0000000017bfa000 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=33323a3032203931206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3832325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303036 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000