syzkaller login: [ 61.292431] BUG: Bad rss-counter state mm:0000000061bfce2d type:MM_FILEPAGES val:33 [ 61.293888] BUG: Bad rss-counter state mm:0000000061bfce2d type:MM_ANONPAGES val:22 [ 61.437674] ================================================================== [ 61.438588] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 61.439488] Read of size 8 at addr ffff888018f78798 by task sshd/220 [ 61.440474] [ 61.440684] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 61.441516] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 61.442445] Call Trace: [ 61.442749] [ 61.443019] dump_stack_lvl+0x91/0xf0 [ 61.443500] print_report+0xcc/0x620 [ 61.443987] ? __virt_addr_valid+0x102/0x340 [ 61.444530] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.445127] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.445716] kasan_report+0xbe/0xf0 [ 61.446180] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.446768] vma_interval_tree_remove+0xc75/0xec0 [ 61.447361] vma_prepare+0xc54/0x11a0 [ 61.447816] __split_vma+0x5af/0x950 [ 61.448285] ? __pfx___split_vma+0x10/0x10 [ 61.448785] ? find_held_lock+0x2c/0x110 [ 61.449291] do_vmi_align_munmap+0x2ba/0x11f0 [ 61.449833] ? lock_is_held_type+0x9f/0x120 [ 61.450373] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 61.450949] ? mtree_range_walk+0x632/0x900 [ 61.451488] ? mas_walk+0x5c7/0x7c0 [ 61.451955] do_vmi_munmap+0x1f1/0x2b0 [ 61.452438] mmap_region+0x1f9/0x2660 [ 61.452898] ? vm_mmap_pgoff+0x15c/0x3a0 [ 61.453398] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 61.454078] ? __pfx_lock_acquire+0x10/0x10 [ 61.454607] ? __pfx_mmap_region+0x10/0x10 [ 61.455119] ? security_mmap_addr+0x7d/0xa0 [ 61.455628] ? get_unmapped_area+0x1f5/0x3f0 [ 61.456190] do_mmap+0x854/0xf00 [ 61.456616] vm_mmap_pgoff+0x1a6/0x3a0 [ 61.457090] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 61.457627] ksys_mmap_pgoff+0x3af/0x500 [ 61.458118] do_syscall_64+0x3f/0x90 [ 61.458575] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.459213] RIP: 0033:0x7ff4e936fd82 [ 61.459658] 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 [ 61.461673] RSP: 002b:00007ffc68ea62c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 61.462534] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff4e936fd82 [ 61.463344] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff4e87a9000 [ 61.464341] RBP: 00007ff4e87a9000 R08: 0000000000000009 R09: 0000000000001000 [ 61.465227] R10: 0000000000000812 R11: 0000000000000206 R12: 00005559950acec0 [ 61.466114] R13: 00007ffc68ea62e0 R14: 00007ffc68ea6310 R15: 00007ffc68ea6670 [ 61.466975] [ 61.467279] [ 61.467489] Allocated by task 213: [ 61.467928] kasan_save_stack+0x22/0x50 [ 61.468471] kasan_set_track+0x25/0x30 [ 61.468962] __kasan_slab_alloc+0x59/0x70 [ 61.469499] kmem_cache_alloc+0x16b/0x370 [ 61.470003] vm_area_dup+0x20/0x160 [ 61.470467] __split_vma+0x170/0x950 [ 61.470934] split_vma+0xc6/0x110 [ 61.471397] mprotect_fixup+0x8d2/0xb30 [ 61.471916] do_mprotect_pkey+0x87e/0xd40 [ 61.472535] __x64_sys_mprotect+0x78/0xc0 [ 61.473108] do_syscall_64+0x3f/0x90 [ 61.473601] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.474307] [ 61.474529] Freed by task 213: [ 61.474918] kasan_save_stack+0x22/0x50 [ 61.475458] kasan_set_track+0x25/0x30 [ 61.475991] kasan_save_free_info+0x2b/0x50 [ 61.476541] __kasan_slab_free+0x10a/0x190 [ 61.477070] kmem_cache_free+0x10d/0x4d0 [ 61.477585] rcu_core+0x8c8/0x2860 [ 61.478029] __do_softirq+0x1b7/0x7d4 [ 61.478515] [ 61.478734] Last potentially related work creation: [ 61.479341] kasan_save_stack+0x22/0x50 [ 61.479845] __kasan_record_aux_stack+0x8e/0xa0 [ 61.480447] __call_rcu_common.constprop.0+0x6a/0xb90 [ 61.481083] remove_vma+0x139/0x170 [ 61.481555] do_vmi_align_munmap+0xd4a/0x11f0 [ 61.482165] do_vmi_munmap+0x1f1/0x2b0 [ 61.482657] __vm_munmap+0x138/0x3a0 [ 61.483130] __x64_sys_munmap+0x59/0x80 [ 61.483641] do_syscall_64+0x3f/0x90 [ 61.484143] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.484796] [ 61.485010] The buggy address belongs to the object at ffff888018f78740 [ 61.485010] which belongs to the cache vm_area_struct of size 168 [ 61.486515] The buggy address is located 88 bytes inside of [ 61.486515] freed 168-byte region [ffff888018f78740, ffff888018f787e8) [ 61.487949] [ 61.488168] The buggy address belongs to the physical page: [ 61.488836] page:000000009c92777e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18f78 [ 61.489945] memcg:ffff88800edd3c01 [ 61.490368] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 61.491087] page_type: 0xffffffff() [ 61.491555] raw: 0100000000000200 ffff8880087a0c80 ffffea000063de40 dead000000000007 [ 61.492496] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800edd3c01 [ 61.493414] page dumped because: kasan: bad access detected [ 61.494090] [ 61.494308] Memory state around the buggy address: [ 61.494909] ffff888018f78680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 61.495772] ffff888018f78700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 61.496659] >ffff888018f78780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 61.497507] ^ [ 61.498017] ffff888018f78800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 61.498878] ffff888018f78880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 61.499752] ================================================================== [ 61.500738] Disabling lock debugging due to kernel taint [ 63.464299] BUG: Bad rss-counter state mm:00000000bf7e4ebd type:MM_FILEPAGES val:33 [ 63.466000] BUG: Bad rss-counter state mm:00000000bf7e4ebd type:MM_ANONPAGES val:22 [ 63.993006] BUG: Bad rss-counter state mm:00000000e8c51df4 type:MM_FILEPAGES val:33 [ 63.994160] BUG: Bad rss-counter state mm:00000000e8c51df4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:46315' (ECDSA) to the list of known hosts. 2023/06/20 21:32:47 fuzzer started 2023/06/20 21:32:48 dialing manager at localhost:36067 2023/06/20 21:32:48 checking machine... 2023/06/20 21:32:48 checking revisions... [ 64.632113] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:32:48 testing simple program... [ 64.683973] cgroup: Unknown subsys name 'net' [ 64.727151] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:32:47 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000064921c2b RCX=ffffffff81ec586e RDX=ffff888014649b40 RSI=0000000000000008 RDI=ffffffff87f41f60 RBP=0000000064921aff RSP=ffff888017c57ea0 R8 =0000000000000006 R9 =0000000064921aff R10=0000000064921c2b R11=00000000000b6a61 R12=0000000064921aff R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8180fea8 RFL=00000293 [--S-A-C] 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 00007fefc414b900 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=00007fefc40ff01c CR3=0000000014696000 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=ffffffff00ffffffffffffffffffffff XMM01=707465675f6c697475646f6d6d61705f XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff110028d1ad1 RBX=ffff88801468d658 RCX=1ffff11001cc87dc RDX=dffffc0000000000 RSI=ffff88800f6cbab0 RDI=ffff88801468d688 RBP=ffff88800c731798 RSP=ffff888017c579c8 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6a61 R12=ffff88800f6cbaa0 R13=0000000000000000 R14=ffff88801aa39c28 R15=ffff88801aa39be0 RIP=ffffffff8184767e 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 00007fefc414b900 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=00007fefc47030b0 CR3=0000000014696000 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