syzkaller login: [ 52.185132] BUG: Bad rss-counter state mm:00000000a9e7a6e8 type:MM_FILEPAGES val:33 [ 52.185857] BUG: Bad rss-counter state mm:00000000a9e7a6e8 type:MM_ANONPAGES val:22 [ 52.358745] ================================================================== [ 52.359738] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 52.360736] Read of size 8 at addr ffff88800e3e76b0 by task sshd/219 [ 52.361642] [ 52.361872] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 52.362773] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 52.363824] Call Trace: [ 52.364160] [ 52.364460] dump_stack_lvl+0x91/0xf0 [ 52.364977] print_report+0xcc/0x620 [ 52.365495] ? __virt_addr_valid+0x102/0x340 [ 52.366082] ? vma_interval_tree_remove+0xc75/0xec0 [ 52.366736] ? vma_interval_tree_remove+0xc75/0xec0 [ 52.367398] kasan_report+0xbe/0xf0 [ 52.367912] ? vma_interval_tree_remove+0xc75/0xec0 [ 52.368571] vma_interval_tree_remove+0xc75/0xec0 [ 52.369216] vma_prepare+0xc54/0x11a0 [ 52.369722] __split_vma+0x5af/0x950 [ 52.370239] ? __pfx___split_vma+0x10/0x10 [ 52.370797] ? find_held_lock+0x2c/0x110 [ 52.371347] do_vmi_align_munmap+0x2ba/0x11f0 [ 52.371967] ? lock_is_held_type+0x9f/0x120 [ 52.372541] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 52.373206] ? mtree_range_walk+0x632/0x900 [ 52.373796] ? mas_walk+0x5c7/0x7c0 [ 52.374301] do_vmi_munmap+0x1f1/0x2b0 [ 52.374831] mmap_region+0x1f9/0x2660 [ 52.375339] ? vm_mmap_pgoff+0x15c/0x3a0 [ 52.375893] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 52.376664] ? __pfx_lock_acquire+0x10/0x10 [ 52.377249] ? __pfx_mmap_region+0x10/0x10 [ 52.377831] ? security_mmap_addr+0x7d/0xa0 [ 52.378417] ? get_unmapped_area+0x1f5/0x3f0 [ 52.379012] do_mmap+0x854/0xf00 [ 52.379490] vm_mmap_pgoff+0x1a6/0x3a0 [ 52.380054] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 52.380669] ksys_mmap_pgoff+0x3af/0x500 [ 52.381226] do_syscall_64+0x3f/0x90 [ 52.381748] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 52.382452] RIP: 0033:0x7fe7afc2cd82 [ 52.382948] 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 [ 52.385249] RSP: 002b:00007ffca0144128 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 52.386240] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe7afc2cd82 [ 52.387155] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe7af066000 [ 52.388094] RBP: 00007fe7af066000 R08: 0000000000000009 R09: 0000000000001000 [ 52.389069] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555b764b4f70 [ 52.389987] R13: 00007ffca0144140 R14: 00007ffca0144170 R15: 00007ffca01444d0 [ 52.390923] [ 52.391240] [ 52.391477] Allocated by task 212: [ 52.391960] kasan_save_stack+0x22/0x50 [ 52.392519] kasan_set_track+0x25/0x30 [ 52.393052] __kasan_slab_alloc+0x59/0x70 [ 52.393625] kmem_cache_alloc+0x16b/0x370 [ 52.394190] vm_area_dup+0x20/0x160 [ 52.394683] __split_vma+0x170/0x950 [ 52.395186] split_vma+0xc6/0x110 [ 52.395662] mprotect_fixup+0x8d2/0xb30 [ 52.396206] do_mprotect_pkey+0x87e/0xd40 [ 52.396769] __x64_sys_mprotect+0x78/0xc0 [ 52.397327] do_syscall_64+0x3f/0x90 [ 52.397840] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 52.398533] [ 52.398763] Freed by task 212: [ 52.399186] kasan_save_stack+0x22/0x50 [ 52.399745] kasan_set_track+0x25/0x30 [ 52.400278] kasan_save_free_info+0x2b/0x50 [ 52.400860] __kasan_slab_free+0x10a/0x190 [ 52.401438] kmem_cache_free+0x10d/0x4d0 [ 52.401984] rcu_core+0x8c8/0x2860 [ 52.402466] __do_softirq+0x1b7/0x7d4 [ 52.402978] [ 52.403214] Last potentially related work creation: [ 52.403860] kasan_save_stack+0x22/0x50 [ 52.404408] __kasan_record_aux_stack+0x8e/0xa0 [ 52.405039] __call_rcu_common.constprop.0+0x6a/0xb90 [ 52.405737] remove_vma+0x139/0x170 [ 52.406226] do_vmi_align_munmap+0xd4a/0x11f0 [ 52.406835] do_vmi_munmap+0x1f1/0x2b0 [ 52.407365] __vm_munmap+0x138/0x3a0 [ 52.407871] __x64_sys_munmap+0x59/0x80 [ 52.408408] do_syscall_64+0x3f/0x90 [ 52.408916] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 52.409616] [ 52.409851] The buggy address belongs to the object at ffff88800e3e7658 [ 52.409851] which belongs to the cache vm_area_struct of size 168 [ 52.411444] The buggy address is located 88 bytes inside of [ 52.411444] freed 168-byte region [ffff88800e3e7658, ffff88800e3e7700) [ 52.412988] [ 52.413222] The buggy address belongs to the physical page: [ 52.413937] page:00000000b5ddbfdd refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe3e7 [ 52.415113] memcg:ffff88800e6b9501 [ 52.415648] flags: 0x100000000000200(slab|node=0|zone=1) [ 52.416341] page_type: 0xffffffff() [ 52.416827] raw: 0100000000000200 ffff88800879fc80 ffffea00003a9b40 dead000000000008 [ 52.417811] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e6b9501 [ 52.418777] page dumped because: kasan: bad access detected [ 52.419484] [ 52.419732] Memory state around the buggy address: [ 52.420353] ffff88800e3e7580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 52.421282] ffff88800e3e7600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 52.422192] >ffff88800e3e7680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 52.423104] ^ [ 52.423739] ffff88800e3e7700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 52.424661] ffff88800e3e7780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 52.425571] ================================================================== [ 52.426632] Disabling lock debugging due to kernel taint [ 54.817788] BUG: Bad rss-counter state mm:00000000ed291056 type:MM_FILEPAGES val:33 [ 54.820166] BUG: Bad rss-counter state mm:00000000ed291056 type:MM_ANONPAGES val:22 [ 55.328402] BUG: Bad rss-counter state mm:00000000f9ab3026 type:MM_FILEPAGES val:33 [ 55.329110] BUG: Bad rss-counter state mm:00000000f9ab3026 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:20826' (ECDSA) to the list of known hosts. 2023/06/20 10:04:31 fuzzer started 2023/06/20 10:04:32 dialing manager at localhost:44161 2023/06/20 10:04:32 checking machine... 2023/06/20 10:04:32 checking revisions... [ 56.159739] kmemleak: Automatic memory scanning thread ended 2023/06/20 10:04:32 testing simple program... [ 56.214587] cgroup: Unknown subsys name 'net' [ 56.249487] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:04:10 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888008ec2e00 RCX=1ffffd40000752e4 RDX=1ffff110011d85c8 RSI=ffffffff8176f540 RDI=ffffea00003a9720 RBP=ffffe8ffffc12550 RSP=ffff888016e775d0 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000001 R11=00000000000b6996 R12=0000607f92e12550 R13=0000000000000282 R14=ffff888008ec2e40 R15=ffff88806ce3a000 RIP=ffffffff816c4504 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 00007feb99e9c700 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=00007ffe0b8f0468 CR3=000000000d9a0000 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=00007f63f783251000005599ff853790 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 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88806cf09b40 RCX=ffffffff860cef01 RDX=1ffff1100d9e1382 RSI=ffffffff818a56b9 RDI=ffff88806cf09b4c RBP=ffff88806cf09c10 RSP=ffff88806cf09a58 R8 =ffffffff860cef20 R9 =ffff88806cf09ab8 R10=0000000000038001 R11=000000000000f732 R12=ffff88806cf09b40 R13=0000000000000000 R14=ffff88801652b680 R15=ffff88800cfd7880 RIP=ffffffff813ad4f7 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 00007fe565118900 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=00007fe5656cd650 CR3=000000001640e000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000