syzkaller login: [ 42.774896] BUG: Bad rss-counter state mm:00000000a3b9e5c8 type:MM_FILEPAGES val:33 [ 42.775897] BUG: Bad rss-counter state mm:00000000a3b9e5c8 type:MM_ANONPAGES val:22 [ 42.811696] ================================================================== [ 42.812679] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 42.813778] Read of size 8 at addr ffff88800e5bc228 by task sshd/221 [ 42.814722] [ 42.814967] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 42.815901] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 42.817023] Call Trace: [ 42.817365] [ 42.817693] dump_stack_lvl+0x91/0xf0 [ 42.818269] print_report+0xcc/0x620 [ 42.818790] ? __virt_addr_valid+0x102/0x340 [ 42.819427] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.820065] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.820683] kasan_report+0xbe/0xf0 [ 42.821190] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.821824] vma_interval_tree_remove+0xc75/0xec0 [ 42.822427] vma_prepare+0xc54/0x11a0 [ 42.822942] __split_vma+0x5af/0x950 [ 42.823420] ? __pfx___split_vma+0x10/0x10 [ 42.823961] ? find_held_lock+0x2c/0x110 [ 42.824490] do_vmi_align_munmap+0x2ba/0x11f0 [ 42.825078] ? lock_is_held_type+0x9f/0x120 [ 42.825622] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 42.826249] ? mtree_range_walk+0x632/0x900 [ 42.826834] ? mas_walk+0x5c7/0x7c0 [ 42.827314] do_vmi_munmap+0x1f1/0x2b0 [ 42.827820] mmap_region+0x1f9/0x2660 [ 42.828308] ? vm_mmap_pgoff+0x15c/0x3a0 [ 42.828851] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 42.829562] ? __pfx_lock_acquire+0x10/0x10 [ 42.830113] ? __pfx_mmap_region+0x10/0x10 [ 42.830670] ? security_mmap_addr+0x7d/0xa0 [ 42.831222] ? get_unmapped_area+0x1f5/0x3f0 [ 42.831790] do_mmap+0x854/0xf00 [ 42.832229] vm_mmap_pgoff+0x1a6/0x3a0 [ 42.832738] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 42.833316] ksys_mmap_pgoff+0x3af/0x500 [ 42.833840] do_syscall_64+0x3f/0x90 [ 42.834316] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.835004] RIP: 0033:0x7fb0e0f0cd82 [ 42.835469] 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 [ 42.837619] RSP: 002b:00007ffef04ff548 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 42.838547] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb0e0f0cd82 [ 42.839436] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb0e0346000 [ 42.840305] RBP: 00007fb0e0346000 R08: 0000000000000009 R09: 0000000000001000 [ 42.841164] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556f6b11cf70 [ 42.842015] R13: 00007ffef04ff560 R14: 00007ffef04ff590 R15: 00007ffef04ff8f0 [ 42.842911] [ 42.843208] [ 42.843426] Allocated by task 214: [ 42.843868] kasan_save_stack+0x22/0x50 [ 42.844375] kasan_set_track+0x25/0x30 [ 42.844889] __kasan_slab_alloc+0x59/0x70 [ 42.845413] kmem_cache_alloc+0x16b/0x370 [ 42.845940] vm_area_dup+0x20/0x160 [ 42.846406] __split_vma+0x170/0x950 [ 42.846917] split_vma+0xc6/0x110 [ 42.847353] mprotect_fixup+0x8d2/0xb30 [ 42.847888] do_mprotect_pkey+0x87e/0xd40 [ 42.848421] __x64_sys_mprotect+0x78/0xc0 [ 42.848957] do_syscall_64+0x3f/0x90 [ 42.849432] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.850087] [ 42.850302] Freed by task 214: [ 42.850707] kasan_save_stack+0x22/0x50 [ 42.851216] kasan_set_track+0x25/0x30 [ 42.851718] kasan_save_free_info+0x2b/0x50 [ 42.852275] __kasan_slab_free+0x10a/0x190 [ 42.852823] kmem_cache_free+0x10d/0x4d0 [ 42.853333] rcu_core+0x8c8/0x2860 [ 42.853787] __do_softirq+0x1b7/0x7d4 [ 42.854269] [ 42.854482] Last potentially related work creation: [ 42.855094] kasan_save_stack+0x22/0x50 [ 42.855606] __kasan_record_aux_stack+0x8e/0xa0 [ 42.856209] __call_rcu_common.constprop.0+0x6a/0xb90 [ 42.856922] remove_vma+0x139/0x170 [ 42.857374] do_vmi_align_munmap+0xd4a/0x11f0 [ 42.857941] do_vmi_munmap+0x1f1/0x2b0 [ 42.858433] __vm_munmap+0x138/0x3a0 [ 42.858956] __x64_sys_munmap+0x59/0x80 [ 42.859628] do_syscall_64+0x3f/0x90 [ 42.860259] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.861093] [ 42.861379] Second to last potentially related work creation: [ 42.862274] kasan_save_stack+0x22/0x50 [ 42.862946] __kasan_record_aux_stack+0x8e/0xa0 [ 42.863704] __call_rcu_common.constprop.0+0x6a/0xb90 [ 42.864423] remove_vma+0x139/0x170 [ 42.864948] do_vmi_align_munmap+0xd4a/0x11f0 [ 42.865671] do_vmi_munmap+0x1f1/0x2b0 [ 42.866181] __vm_munmap+0x138/0x3a0 [ 42.866674] __x64_sys_munmap+0x59/0x80 [ 42.867196] do_syscall_64+0x3f/0x90 [ 42.867678] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.868344] [ 42.868562] The buggy address belongs to the object at ffff88800e5bc1d0 [ 42.868562] which belongs to the cache vm_area_struct of size 168 [ 42.870062] The buggy address is located 88 bytes inside of [ 42.870062] freed 168-byte region [ffff88800e5bc1d0, ffff88800e5bc278) [ 42.871501] [ 42.871729] The buggy address belongs to the physical page: [ 42.872386] page:00000000ac906ea7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe5bc [ 42.873493] memcg:ffff88800df08c01 [ 42.873929] flags: 0x100000000000200(slab|node=0|zone=1) [ 42.874576] page_type: 0xffffffff() [ 42.875062] raw: 0100000000000200 ffff88800879fc80 ffffea0000385b00 dead000000000008 [ 42.875994] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800df08c01 [ 42.876910] page dumped because: kasan: bad access detected [ 42.877573] [ 42.877821] Memory state around the buggy address: [ 42.878401] ffff88800e5bc100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 42.879299] ffff88800e5bc180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 42.880163] >ffff88800e5bc200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 42.881025] ^ [ 42.881579] ffff88800e5bc280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 42.882467] ffff88800e5bc300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 42.883340] ================================================================== [ 42.884362] Disabling lock debugging due to kernel taint [ 44.886883] BUG: Bad rss-counter state mm:000000006cfb9137 type:MM_FILEPAGES val:33 [ 44.888289] BUG: Bad rss-counter state mm:000000006cfb9137 type:MM_ANONPAGES val:22 [ 45.334646] BUG: Bad rss-counter state mm:00000000c154c2ef type:MM_FILEPAGES val:33 [ 45.335837] BUG: Bad rss-counter state mm:00000000c154c2ef type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62472' (ECDSA) to the list of known hosts. 2023/06/20 05:09:43 fuzzer started 2023/06/20 05:09:43 dialing manager at localhost:44161 2023/06/20 05:09:43 checking machine... 2023/06/20 05:09:43 checking revisions... [ 46.011067] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:09:44 testing simple program... [ 46.061464] cgroup: Unknown subsys name 'net' [ 46.111332] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:09:31 Registers: info registers vcpu 0 RAX=00000000c0813fd6 RBX=00000000790ecaca RCX=ffff888009a4f96c RDX=0000000000000010 RSI=000000000000001d RDI=00000000f608310c RBP=ffff88800844f780 RSP=ffff888009a4f8f8 R8 =00000000a2f29ab0 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000001 R13=0000000000092cc0 R14=ffff888009a4f960 R15=0000000000000010 RIP=ffffffff82270ebc RFL=00000292 [--S-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 00007f185db45900 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=00007ffd1b86d000 CR3=000000000d842000 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=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 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=00007f275cd01520 CR3=000000000d804000 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=e37fb1e93a6fed847e4d11ebad826480 XMM02=000000000011ef90eff9b2d0a8fce9cb XMM03=000000000011f0602c67c8bc2e329bc3 XMM04=05262eba99f9b06700000000000ae988 XMM05=134fcabd387c19ed0000000000136a70 XMM06=c291bd5c70af25b90000000000136468 XMM07=e042d86d42eb936e0000000000125bf8 XMM08=045bfcdfbde309eb000000000011f060 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000