syzkaller login: [ 38.774729] BUG: Bad rss-counter state mm:00000000ff6d6e12 type:MM_FILEPAGES val:33 [ 38.775763] BUG: Bad rss-counter state mm:00000000ff6d6e12 type:MM_ANONPAGES val:22 [ 38.940398] ================================================================== [ 38.941323] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.942251] Read of size 8 at addr ffff88800f615880 by task sshd/219 [ 38.943157] [ 38.943380] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 38.944232] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.945221] Call Trace: [ 38.945543] [ 38.945828] dump_stack_lvl+0x91/0xf0 [ 38.946322] print_report+0xcc/0x620 [ 38.946805] ? __virt_addr_valid+0x102/0x340 [ 38.947371] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.947981] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.948618] kasan_report+0xbe/0xf0 [ 38.949095] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.949725] vma_interval_tree_remove+0xc75/0xec0 [ 38.950337] vma_prepare+0xc54/0x11a0 [ 38.950821] __split_vma+0x5af/0x950 [ 38.951317] ? __pfx___split_vma+0x10/0x10 [ 38.951838] ? find_held_lock+0x2c/0x110 [ 38.952360] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.952931] ? lock_is_held_type+0x9f/0x120 [ 38.953473] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.954082] ? mtree_range_walk+0x632/0x900 [ 38.954625] ? mas_walk+0x5c7/0x7c0 [ 38.955116] do_vmi_munmap+0x1f1/0x2b0 [ 38.955615] mmap_region+0x1f9/0x2660 [ 38.956101] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.956620] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.957329] ? __pfx_lock_acquire+0x10/0x10 [ 38.957860] ? __pfx_mmap_region+0x10/0x10 [ 38.958392] ? security_mmap_addr+0x7d/0xa0 [ 38.958924] ? get_unmapped_area+0x1f5/0x3f0 [ 38.959557] do_mmap+0x854/0xf00 [ 38.960000] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.960492] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.961065] ksys_mmap_pgoff+0x3af/0x500 [ 38.961571] do_syscall_64+0x3f/0x90 [ 38.962046] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.962694] RIP: 0033:0x7f53c36bbd82 [ 38.963186] 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 [ 38.965648] RSP: 002b:00007ffc778ed198 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.966763] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f53c36bbd82 [ 38.967804] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f53c2af5000 [ 38.968824] RBP: 00007f53c2af5000 R08: 0000000000000009 R09: 0000000000001000 [ 38.969831] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564a22290f60 [ 38.970822] R13: 00007ffc778ed1b0 R14: 00007ffc778ed1e0 R15: 00007ffc778ed540 [ 38.971866] [ 38.972165] [ 38.972380] Allocated by task 211: [ 38.972809] kasan_save_stack+0x22/0x50 [ 38.973314] kasan_set_track+0x25/0x30 [ 38.973804] __kasan_slab_alloc+0x59/0x70 [ 38.974322] kmem_cache_alloc+0x16b/0x370 [ 38.974839] vm_area_dup+0x20/0x160 [ 38.975295] __split_vma+0x170/0x950 [ 38.975756] split_vma+0xc6/0x110 [ 38.976195] mprotect_fixup+0x8d2/0xb30 [ 38.976695] do_mprotect_pkey+0x87e/0xd40 [ 38.977213] __x64_sys_mprotect+0x78/0xc0 [ 38.977735] do_syscall_64+0x3f/0x90 [ 38.978202] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.978847] [ 38.979068] Freed by task 211: [ 38.979457] kasan_save_stack+0x22/0x50 [ 38.979957] kasan_set_track+0x25/0x30 [ 38.980451] kasan_save_free_info+0x2b/0x50 [ 38.980978] __kasan_slab_free+0x10a/0x190 [ 38.981507] kmem_cache_free+0x10d/0x4d0 [ 38.982015] rcu_core+0x8c8/0x2860 [ 38.982460] __do_softirq+0x1b7/0x7d4 [ 38.982935] [ 38.983164] Last potentially related work creation: [ 38.983746] kasan_save_stack+0x22/0x50 [ 38.984246] __kasan_record_aux_stack+0x8e/0xa0 [ 38.984819] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.985456] remove_vma+0x139/0x170 [ 38.985901] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.986452] do_vmi_munmap+0x1f1/0x2b0 [ 38.986938] __vm_munmap+0x138/0x3a0 [ 38.987427] __x64_sys_munmap+0x59/0x80 [ 38.987926] do_syscall_64+0x3f/0x90 [ 38.988401] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.989039] [ 38.989252] The buggy address belongs to the object at ffff88800f615828 [ 38.989252] which belongs to the cache vm_area_struct of size 168 [ 38.990718] The buggy address is located 88 bytes inside of [ 38.990718] freed 168-byte region [ffff88800f615828, ffff88800f6158d0) [ 38.992155] [ 38.992378] The buggy address belongs to the physical page: [ 38.993041] page:00000000cd6150be refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf615 [ 38.994120] memcg:ffff88800fe32b01 [ 38.994547] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.995194] page_type: 0xffffffff() [ 38.995642] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 38.996559] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fe32b01 [ 38.997460] page dumped because: kasan: bad access detected [ 38.998123] [ 38.998344] Memory state around the buggy address: [ 38.998918] ffff88800f615780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 38.999779] ffff88800f615800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 39.000646] >ffff88800f615880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 39.001519] ^ [ 39.001933] ffff88800f615900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.002788] ffff88800f615980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 39.003650] ================================================================== [ 39.004899] Disabling lock debugging due to kernel taint [ 41.866342] BUG: Bad rss-counter state mm:0000000093fe2863 type:MM_FILEPAGES val:33 [ 41.867512] BUG: Bad rss-counter state mm:0000000093fe2863 type:MM_ANONPAGES val:22 [ 42.305974] BUG: Bad rss-counter state mm:000000007987d1aa type:MM_FILEPAGES val:33 [ 42.307169] BUG: Bad rss-counter state mm:000000007987d1aa type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:34562' (ECDSA) to the list of known hosts. 2023/06/20 06:39:48 fuzzer started 2023/06/20 06:39:48 dialing manager at localhost:44161 2023/06/20 06:39:48 checking machine... 2023/06/20 06:39:48 checking revisions... [ 42.961091] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:39:48 testing simple program... [ 43.009985] cgroup: Unknown subsys name 'net' [ 43.059433] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:39:37 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=00007f98ac8f4440 CR3=0000000015820000 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=2037343a39333a3630203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037343a39333a3630203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffed1001fd29c9 RBX=ffff88800fe94e40 RCX=ffffffff812e00d6 RDX=ffffed1001fd29c9 RSI=0000000000000004 RDI=ffff88800fe94e40 RBP=ffffed1001fd29c8 RSP=ffff88800fb977e8 R8 =0000000000000001 R9 =ffffed1001fd29c8 R10=ffff88800fe94e43 R11=ff00545000000000 R12=ffff88800fe94e48 R13=ffff88800fe94e50 R14=ffffffff83677d2f R15=00000000000000e8 RIP=ffffffff8180efaf 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 00007f4d3a897900 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=00007ffee8a92000 CR3=000000000e74c000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000