syzkaller login: [ 44.944565] BUG: Bad rss-counter state mm:00000000a3fa8d92 type:MM_FILEPAGES val:33 [ 44.945595] BUG: Bad rss-counter state mm:00000000a3fa8d92 type:MM_ANONPAGES val:22 [ 45.058904] ================================================================== [ 45.059522] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 45.060155] Read of size 8 at addr ffff888019b8c4e0 by task sshd/219 [ 45.060665] [ 45.060854] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 45.061427] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 45.062064] Call Trace: [ 45.062279] [ 45.062471] dump_stack_lvl+0x91/0xf0 [ 45.062804] print_report+0xcc/0x620 [ 45.063132] ? __virt_addr_valid+0x102/0x340 [ 45.063663] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.064087] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.064508] kasan_report+0xbe/0xf0 [ 45.064846] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.065261] vma_interval_tree_remove+0xc75/0xec0 [ 45.065756] vma_prepare+0xc54/0x11a0 [ 45.066082] __split_vma+0x5af/0x950 [ 45.066403] ? __pfx___split_vma+0x10/0x10 [ 45.066763] ? find_held_lock+0x2c/0x110 [ 45.067113] do_vmi_align_munmap+0x2ba/0x11f0 [ 45.067492] ? lock_is_held_type+0x9f/0x120 [ 45.067850] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 45.068258] ? mtree_range_walk+0x632/0x900 [ 45.068629] ? mas_walk+0x5c7/0x7c0 [ 45.068981] do_vmi_munmap+0x1f1/0x2b0 [ 45.069312] mmap_region+0x1f9/0x2660 [ 45.069638] ? vm_mmap_pgoff+0x15c/0x3a0 [ 45.069981] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 45.070458] ? __pfx_lock_acquire+0x10/0x10 [ 45.070815] ? __pfx_mmap_region+0x10/0x10 [ 45.071172] ? security_mmap_addr+0x7d/0xa0 [ 45.071531] ? get_unmapped_area+0x1f5/0x3f0 [ 45.071936] do_mmap+0x854/0xf00 [ 45.072230] vm_mmap_pgoff+0x1a6/0x3a0 [ 45.072568] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 45.073004] ksys_mmap_pgoff+0x3af/0x500 [ 45.073347] do_syscall_64+0x3f/0x90 [ 45.073673] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.074241] RIP: 0033:0x7f0bcfd3ad82 [ 45.074549] 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 [ 45.075948] RSP: 002b:00007ffe9026ea18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 45.076539] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0bcfd3ad82 [ 45.077100] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0bcf174000 [ 45.077639] RBP: 00007f0bcf174000 R08: 0000000000000009 R09: 0000000000001000 [ 45.078184] R10: 0000000000000812 R11: 0000000000000206 R12: 00005573adc5dec0 [ 45.078728] R13: 00007ffe9026ea30 R14: 00007ffe9026ea60 R15: 00007ffe9026edc0 [ 45.079284] [ 45.079478] [ 45.079636] Allocated by task 212: [ 45.079923] kasan_save_stack+0x22/0x50 [ 45.080253] kasan_set_track+0x25/0x30 [ 45.080577] __kasan_slab_alloc+0x59/0x70 [ 45.080987] kmem_cache_alloc+0x16b/0x370 [ 45.081321] vm_area_dup+0x20/0x160 [ 45.081616] __split_vma+0x170/0x950 [ 45.081917] split_vma+0xc6/0x110 [ 45.082215] mprotect_fixup+0x8d2/0xb30 [ 45.082555] do_mprotect_pkey+0x87e/0xd40 [ 45.082904] __x64_sys_mprotect+0x78/0xc0 [ 45.083256] do_syscall_64+0x3f/0x90 [ 45.083579] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.084013] [ 45.084160] Freed by task 212: [ 45.084424] kasan_save_stack+0x22/0x50 [ 45.084779] kasan_set_track+0x25/0x30 [ 45.085113] kasan_save_free_info+0x2b/0x50 [ 45.085472] __kasan_slab_free+0x10a/0x190 [ 45.085832] kmem_cache_free+0x10d/0x4d0 [ 45.086163] rcu_core+0x8c8/0x2860 [ 45.086462] __do_softirq+0x1b7/0x7d4 [ 45.086780] [ 45.086929] Last potentially related work creation: [ 45.087319] kasan_save_stack+0x22/0x50 [ 45.087658] __kasan_record_aux_stack+0x8e/0xa0 [ 45.088045] __call_rcu_common.constprop.0+0x6a/0xb90 [ 45.088476] remove_vma+0x139/0x170 [ 45.088808] do_vmi_align_munmap+0xd4a/0x11f0 [ 45.089180] do_vmi_munmap+0x1f1/0x2b0 [ 45.089503] __vm_munmap+0x138/0x3a0 [ 45.089823] __x64_sys_munmap+0x59/0x80 [ 45.090157] do_syscall_64+0x3f/0x90 [ 45.090475] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.091008] [ 45.091155] The buggy address belongs to the object at ffff888019b8c488 [ 45.091155] which belongs to the cache vm_area_struct of size 168 [ 45.092123] The buggy address is located 88 bytes inside of [ 45.092123] freed 168-byte region [ffff888019b8c488, ffff888019b8c530) [ 45.093061] [ 45.093215] The buggy address belongs to the physical page: [ 45.093653] page:0000000034da6a19 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19b8c [ 45.094376] memcg:ffff8880096ed201 [ 45.094663] flags: 0x100000000000200(slab|node=0|zone=1) [ 45.095096] page_type: 0xffffffff() [ 45.095405] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 45.096021] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880096ed201 [ 45.096631] page dumped because: kasan: bad access detected [ 45.097103] [ 45.097252] Memory state around the buggy address: [ 45.097640] ffff888019b8c380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 45.098207] ffff888019b8c400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 45.098781] >ffff888019b8c480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 45.099354] ^ [ 45.099858] ffff888019b8c500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 45.100430] ffff888019b8c580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 45.101014] ================================================================== [ 45.101707] Disabling lock debugging due to kernel taint [ 46.685052] BUG: Bad rss-counter state mm:000000008b145142 type:MM_FILEPAGES val:33 [ 46.685824] BUG: Bad rss-counter state mm:000000008b145142 type:MM_ANONPAGES val:22 [ 47.006931] BUG: Bad rss-counter state mm:0000000006991aac type:MM_FILEPAGES val:33 [ 47.008169] BUG: Bad rss-counter state mm:0000000006991aac type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:42454' (ECDSA) to the list of known hosts. 2023/06/20 09:15:43 fuzzer started 2023/06/20 09:15:43 dialing manager at localhost:44161 2023/06/20 09:15:43 checking machine... 2023/06/20 09:15:43 checking revisions... [ 47.663238] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:15:43 testing simple program... [ 47.701977] cgroup: Unknown subsys name 'net' [ 47.729210] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:15:36 Registers: info registers vcpu 0 RAX=0000000000000007 RBX=ffffea00005e0234 RCX=dffffc0000000000 RDX=0000000000000000 RSI=0000000000000004 RDI=ffffea00005e0234 RBP=ffffea00005e0200 RSP=ffff88800f327148 R8 =0000000000000001 R9 =fffff940000bc046 R10=ffffea00005e0237 R11=0000000000000128 R12=0000000000000000 R13=0000000000000002 R14=0000000000000000 R15=ffff88801b93b180 RIP=ffffffff816274b1 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=00005588ce95a218 CR3=0000000019f58000 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=112bf7c307446bb367f70b4d68b231c2 XMM02=995261e924a9d7132193d8ea832cef92 XMM03=a11a158aec651445b4e071cf450fa02a XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=0e0d0c0f0a09080b0605040702010003 XMM08=01000000000000000000000000000001 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff81143201 RDX=ffff888019dc51c0 RSI=0000000000000800 RDI=0000000000000000 RBP=000000000b876000 RSP=ffff8880164e7938 R8 =0000000000000006 R9 =0000000000000001 R10=0000000000080000 R11=0000000000000000 R12=0000000000000000 R13=0000000000000800 R14=ffff888008d704a8 R15=ffff88806cf39500 RIP=ffffffff814c02f8 RFL=00000293 [--S-A-C] 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 00007f12871f4900 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=00007ffc520296a8 CR3=0000000019f58000 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=00007f4014b4b51000005603d8e9f790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000