syzkaller login: [ 33.720223] BUG: Bad rss-counter state mm:000000001dd3df0b type:MM_FILEPAGES val:33 [ 33.721222] BUG: Bad rss-counter state mm:000000001dd3df0b type:MM_ANONPAGES val:22 [ 33.875016] ================================================================== [ 33.875840] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.876664] Read of size 8 at addr ffff88800f221228 by task sshd/221 [ 33.877341] [ 33.877532] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.878399] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.879271] Call Trace: [ 33.879551] [ 33.879799] dump_stack_lvl+0x91/0xf0 [ 33.880232] print_report+0xcc/0x620 [ 33.880658] ? __virt_addr_valid+0x102/0x340 [ 33.881144] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.881708] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.882251] kasan_report+0xbe/0xf0 [ 33.882669] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.883219] vma_interval_tree_remove+0xc75/0xec0 [ 33.883746] vma_prepare+0xc54/0x11a0 [ 33.884174] __split_vma+0x5af/0x950 [ 33.884585] ? __pfx___split_vma+0x10/0x10 [ 33.885051] ? find_held_lock+0x2c/0x110 [ 33.885510] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.886014] ? lock_is_held_type+0x9f/0x120 [ 33.886491] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.887028] ? mtree_range_walk+0x632/0x900 [ 33.887508] ? mas_walk+0x5c7/0x7c0 [ 33.887930] do_vmi_munmap+0x1f1/0x2b0 [ 33.888358] mmap_region+0x1f9/0x2660 [ 33.888778] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.889225] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.889868] ? __pfx_lock_acquire+0x10/0x10 [ 33.890338] ? __pfx_mmap_region+0x10/0x10 [ 33.890804] ? security_mmap_addr+0x7d/0xa0 [ 33.891269] ? get_unmapped_area+0x1f5/0x3f0 [ 33.891748] do_mmap+0x854/0xf00 [ 33.892136] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.892567] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.893055] ksys_mmap_pgoff+0x3af/0x500 [ 33.893500] do_syscall_64+0x3f/0x90 [ 33.893920] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.894483] RIP: 0033:0x7f6222e73d82 [ 33.894887] 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 [ 33.896731] RSP: 002b:00007ffd3cdae428 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.897521] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6222e73d82 [ 33.898275] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f62222ad000 [ 33.899010] RBP: 00007f62222ad000 R08: 0000000000000009 R09: 0000000000001000 [ 33.899751] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c13fff8f70 [ 33.900493] R13: 00007ffd3cdae440 R14: 00007ffd3cdae470 R15: 00007ffd3cdae7d0 [ 33.901238] [ 33.901496] [ 33.901705] Allocated by task 214: [ 33.902081] kasan_save_stack+0x22/0x50 [ 33.902518] kasan_set_track+0x25/0x30 [ 33.902944] __kasan_slab_alloc+0x59/0x70 [ 33.903398] kmem_cache_alloc+0x16b/0x370 [ 33.903860] vm_area_dup+0x20/0x160 [ 33.904261] __split_vma+0x170/0x950 [ 33.904697] split_vma+0xc6/0x110 [ 33.905086] mprotect_fixup+0x8d2/0xb30 [ 33.905517] do_mprotect_pkey+0x87e/0xd40 [ 33.905974] __x64_sys_mprotect+0x78/0xc0 [ 33.906435] do_syscall_64+0x3f/0x90 [ 33.906861] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.907415] [ 33.907606] Freed by task 214: [ 33.907951] kasan_save_stack+0x22/0x50 [ 33.908399] kasan_set_track+0x25/0x30 [ 33.908826] kasan_save_free_info+0x2b/0x50 [ 33.909287] __kasan_slab_free+0x10a/0x190 [ 33.909778] kmem_cache_free+0x10d/0x4d0 [ 33.910224] rcu_core+0x8c8/0x2860 [ 33.910616] __do_softirq+0x1b7/0x7d4 [ 33.911031] [ 33.911216] Last potentially related work creation: [ 33.911731] kasan_save_stack+0x22/0x50 [ 33.912174] __kasan_record_aux_stack+0x8e/0xa0 [ 33.912684] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.913241] remove_vma+0x139/0x170 [ 33.913648] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.914130] do_vmi_munmap+0x1f1/0x2b0 [ 33.914551] __vm_munmap+0x138/0x3a0 [ 33.914951] __x64_sys_munmap+0x59/0x80 [ 33.915375] do_syscall_64+0x3f/0x90 [ 33.915785] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.916338] [ 33.916524] The buggy address belongs to the object at ffff88800f2211d0 [ 33.916524] which belongs to the cache vm_area_struct of size 168 [ 33.917833] The buggy address is located 88 bytes inside of [ 33.917833] freed 168-byte region [ffff88800f2211d0, ffff88800f221278) [ 33.919048] [ 33.919233] The buggy address belongs to the physical page: [ 33.919806] page:00000000a18b347d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf221 [ 33.920740] memcg:ffff88800aad0601 [ 33.921107] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.921669] page_type: 0xffffffff() [ 33.922056] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 33.922847] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800aad0601 [ 33.923621] page dumped because: kasan: bad access detected [ 33.924188] [ 33.924372] Memory state around the buggy address: [ 33.924873] ffff88800f221100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.925628] ffff88800f221180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 33.926365] >ffff88800f221200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 33.927099] ^ [ 33.927575] ffff88800f221280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 33.928316] ffff88800f221300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 33.929053] ================================================================== [ 33.930108] Disabling lock debugging due to kernel taint [ 36.076175] BUG: Bad rss-counter state mm:000000004b74e5a7 type:MM_FILEPAGES val:33 [ 36.077743] BUG: Bad rss-counter state mm:000000004b74e5a7 type:MM_ANONPAGES val:22 [ 36.548870] BUG: Bad rss-counter state mm:00000000adaf0579 type:MM_FILEPAGES val:33 [ 36.549977] BUG: Bad rss-counter state mm:00000000adaf0579 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:51983' (ECDSA) to the list of known hosts. 2023/06/20 02:35:18 fuzzer started 2023/06/20 02:35:18 dialing manager at localhost:44161 2023/06/20 02:35:18 checking machine... 2023/06/20 02:35:18 checking revisions... [ 37.296964] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:35:19 testing simple program... [ 37.347474] cgroup: Unknown subsys name 'net' [ 37.416973] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:35:15 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffea0000319700 RCX=0000000000000100 RDX=ffff88800844f780 RSI=ffffffff811431c2 RDI=0000777f80000000 RBP=0000000000000000 RSP=ffff88806ce09db0 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000008 R11=00000000000b6996 R12=ffffffff81845c80 R13=ffffea0000651d80 R14=ffffffff813782a8 R15=ffff88800e316c80 RIP=ffffffff8180c49b RFL=00000286 [--S--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 00007fc201193900 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=00007fc20061a280 CR3=000000000eb86000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=3d4fa1b3543ca57600000000000ae988 XMM05=c9b0983b7f3211e900000000001342a0 XMM06=62584b43023f334f0000000000133040 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0bbda45 RBX=ffffffff85ded228 RCX=ffffffff816cae55 RDX=0000000000000000 RSI=ffffffff86120126 RDI=ffffffff85ded210 RBP=ffffffff85ded228 RSP=ffff8880164f78e8 R8 =ffffffff86120126 R9 =ffff8880164f79e0 R10=0000000000038001 R11=000000000001cf8f R12=ffffffff85ded228 R13=ffffffff85ded210 R14=ffffffff85ded224 R15=dffffc0000000000 RIP=ffffffff8112fc7f 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 00007f35017fb900 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=00007fffcebde000 CR3=000000001645a000 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