syzkaller login: [ 30.574507] BUG: Bad rss-counter state mm:000000004042ed5a type:MM_FILEPAGES val:33 [ 30.575680] BUG: Bad rss-counter state mm:000000004042ed5a type:MM_ANONPAGES val:22 [ 30.731507] ================================================================== [ 30.732452] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.733430] Read of size 8 at addr ffff8880100d74e0 by task sshd/221 [ 30.734210] [ 30.734433] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.735490] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.736477] Call Trace: [ 30.736805] [ 30.737100] dump_stack_lvl+0x91/0xf0 [ 30.737742] print_report+0xcc/0x620 [ 30.738327] ? __virt_addr_valid+0x102/0x340 [ 30.739014] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.739754] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.740498] kasan_report+0xbe/0xf0 [ 30.741075] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.741848] vma_interval_tree_remove+0xc75/0xec0 [ 30.742621] vma_prepare+0xc54/0x11a0 [ 30.743219] __split_vma+0x5af/0x950 [ 30.743730] ? __pfx___split_vma+0x10/0x10 [ 30.744267] ? find_held_lock+0x2c/0x110 [ 30.744789] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.745352] ? lock_is_held_type+0x9f/0x120 [ 30.745900] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.746521] ? mtree_range_walk+0x632/0x900 [ 30.747086] ? mas_walk+0x5c7/0x7c0 [ 30.747576] do_vmi_munmap+0x1f1/0x2b0 [ 30.748081] mmap_region+0x1f9/0x2660 [ 30.748569] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.749083] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.749798] ? __pfx_lock_acquire+0x10/0x10 [ 30.750337] ? __pfx_mmap_region+0x10/0x10 [ 30.750882] ? security_mmap_addr+0x7d/0xa0 [ 30.751441] ? get_unmapped_area+0x1f5/0x3f0 [ 30.751994] do_mmap+0x854/0xf00 [ 30.752449] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.752954] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.753536] ksys_mmap_pgoff+0x3af/0x500 [ 30.754046] do_syscall_64+0x3f/0x90 [ 30.754553] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.755305] RIP: 0033:0x7f6d8d1cfd82 [ 30.755754] 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 [ 30.757838] RSP: 002b:00007ffec9915908 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.758731] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6d8d1cfd82 [ 30.759555] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6d8c609000 [ 30.760391] RBP: 00007f6d8c609000 R08: 0000000000000009 R09: 0000000000001000 [ 30.761226] R10: 0000000000000812 R11: 0000000000000206 R12: 00005557d99fff70 [ 30.762056] R13: 00007ffec9915920 R14: 00007ffec9915950 R15: 00007ffec9915cb0 [ 30.762908] [ 30.763199] [ 30.763412] Allocated by task 214: [ 30.763827] kasan_save_stack+0x22/0x50 [ 30.764329] kasan_set_track+0x25/0x30 [ 30.764813] __kasan_slab_alloc+0x59/0x70 [ 30.765319] kmem_cache_alloc+0x16b/0x370 [ 30.765821] vm_area_dup+0x20/0x160 [ 30.766264] __split_vma+0x170/0x950 [ 30.766740] split_vma+0xc6/0x110 [ 30.767171] mprotect_fixup+0x8d2/0xb30 [ 30.767664] do_mprotect_pkey+0x87e/0xd40 [ 30.768171] __x64_sys_mprotect+0x78/0xc0 [ 30.768677] do_syscall_64+0x3f/0x90 [ 30.769142] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.769767] [ 30.769979] Freed by task 214: [ 30.770364] kasan_save_stack+0x22/0x50 [ 30.770854] kasan_set_track+0x25/0x30 [ 30.771333] kasan_save_free_info+0x2b/0x50 [ 30.771855] __kasan_slab_free+0x10a/0x190 [ 30.772374] kmem_cache_free+0x10d/0x4d0 [ 30.772871] rcu_core+0x8c8/0x2860 [ 30.773305] __do_softirq+0x1b7/0x7d4 [ 30.773771] [ 30.773984] Last potentially related work creation: [ 30.774569] kasan_save_stack+0x22/0x50 [ 30.775058] __kasan_record_aux_stack+0x8e/0xa0 [ 30.775611] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.776235] remove_vma+0x139/0x170 [ 30.776736] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.777280] do_vmi_munmap+0x1f1/0x2b0 [ 30.777755] __vm_munmap+0x138/0x3a0 [ 30.778210] __x64_sys_munmap+0x59/0x80 [ 30.778703] do_syscall_64+0x3f/0x90 [ 30.779170] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.779802] [ 30.780013] The buggy address belongs to the object at ffff8880100d7488 [ 30.780013] which belongs to the cache vm_area_struct of size 168 [ 30.781453] The buggy address is located 88 bytes inside of [ 30.781453] freed 168-byte region [ffff8880100d7488, ffff8880100d7530) [ 30.782858] [ 30.783069] The buggy address belongs to the physical page: [ 30.783713] page:000000004e17c6c2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x100d7 [ 30.784775] memcg:ffff88800ee6bf01 [ 30.785188] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.785821] page_type: 0xffffffff() [ 30.786265] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.787164] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ee6bf01 [ 30.788044] page dumped because: kasan: bad access detected [ 30.788683] [ 30.788894] Memory state around the buggy address: [ 30.789458] ffff8880100d7380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.790291] ffff8880100d7400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 30.791126] >ffff8880100d7480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.791967] ^ [ 30.792709] ffff8880100d7500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 30.793540] ffff8880100d7580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.794387] ================================================================== [ 30.795285] Disabling lock debugging due to kernel taint [ 32.906680] BUG: Bad rss-counter state mm:00000000c6ab9c0f type:MM_FILEPAGES val:33 [ 32.907839] BUG: Bad rss-counter state mm:00000000c6ab9c0f type:MM_ANONPAGES val:22 [ 33.421463] BUG: Bad rss-counter state mm:00000000788db610 type:MM_FILEPAGES val:33 [ 33.422663] BUG: Bad rss-counter state mm:00000000788db610 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:39669' (ECDSA) to the list of known hosts. 2023/06/21 06:11:11 fuzzer started 2023/06/21 06:11:11 dialing manager at localhost:36067 2023/06/21 06:11:11 checking machine... 2023/06/21 06:11:11 checking revisions... [ 34.072369] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:11:11 testing simple program... [ 34.125485] cgroup: Unknown subsys name 'net' [ 34.182054] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:11:11 Registers: info registers vcpu 0 RAX=ffff88800c8a3850 RBX=00000000000000f0 RCX=0000000000000001 RDX=0000000000092cc0 RSI=0000000000000000 RDI=ffff88800844f780 RBP=ffff88801699fca8 RSP=ffff88801699fc48 R8 =ffff88801699fc70 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff88800844f780 R13=0000000000000000 R14=0000000000000000 R15=0000000000092cc0 RIP=ffffffff81803cd4 RFL=00000282 [--S----] 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 00007f28e1ef7900 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=00007f28e24af0b0 CR3=000000000ef4a000 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=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 info registers vcpu 1 RAX=0000000000000001 RBX=ffff88806cf09a98 RCX=0000000000000001 RDX=1ffff1100d9e135e RSI=ffff888008e07db0 RDI=ffffffff8460144a RBP=ffff88806cf09af0 RSP=ffff88806cf09a80 R8 =0000000000000001 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=00000000000b5305 R12=ffff88806cf09b60 R13=0000000000000000 R14=ffff888008d951c0 R15=ffff88800dd1da00 RIP=ffffffff81130399 RFL=00000202 [-------] 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 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=00007f2bc0065e70 CR3=00000000101e4000 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=2e397442618b5b9bb04b4841cfc409ca XMM02=000000000011a430ec2efd57dc4c00df XMM03=00000000001218b830c8b362856f308e XMM04=3320356419a9da3000000000000ae988 XMM05=e4cb8bb95a7664b60000000000131730 XMM06=d9c3094cf6fbaabf0000000000130598 XMM07=e042d86d42eb936e0000000000121b38 XMM08=30c8b362856f308e000000000011a490 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000