syzkaller login: [ 38.853900] BUG: Bad rss-counter state mm:000000000540c98a type:MM_FILEPAGES val:33 [ 38.854967] BUG: Bad rss-counter state mm:000000000540c98a type:MM_ANONPAGES val:22 [ 38.901853] ================================================================== [ 38.903233] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.904572] Read of size 8 at addr ffff88800df623f8 by task sshd/219 [ 38.905678] [ 38.905977] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.907214] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.908651] Call Trace: [ 38.909094] [ 38.909489] dump_stack_lvl+0x91/0xf0 [ 38.909980] print_report+0xcc/0x620 [ 38.910440] ? __virt_addr_valid+0x102/0x340 [ 38.911013] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.911624] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.912271] kasan_report+0xbe/0xf0 [ 38.912742] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.913363] vma_interval_tree_remove+0xc75/0xec0 [ 38.913973] vma_prepare+0xc54/0x11a0 [ 38.914454] __split_vma+0x5af/0x950 [ 38.914946] ? __pfx___split_vma+0x10/0x10 [ 38.915472] ? find_held_lock+0x2c/0x110 [ 38.916001] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.916557] ? lock_is_held_type+0x9f/0x120 [ 38.917132] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.917742] ? mtree_range_walk+0x632/0x900 [ 38.918298] ? mas_walk+0x5c7/0x7c0 [ 38.918795] do_vmi_munmap+0x1f1/0x2b0 [ 38.919305] mmap_region+0x1f9/0x2660 [ 38.919803] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.920318] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.921048] ? __pfx_lock_acquire+0x10/0x10 [ 38.921595] ? __pfx_mmap_region+0x10/0x10 [ 38.922160] ? security_mmap_addr+0x7d/0xa0 [ 38.922712] ? get_unmapped_area+0x1f5/0x3f0 [ 38.923292] do_mmap+0x854/0xf00 [ 38.923738] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.924258] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.924834] ksys_mmap_pgoff+0x3af/0x500 [ 38.925353] do_syscall_64+0x3f/0x90 [ 38.925853] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.926505] RIP: 0033:0x7f1a0a5a7d82 [ 38.927022] 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 [ 38.929132] RSP: 002b:00007ffdd4d5cbd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.930019] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1a0a5a7d82 [ 38.930863] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1a099e1000 [ 38.931666] RBP: 00007f1a099e1000 R08: 0000000000000009 R09: 0000000000001000 [ 38.932509] R10: 0000000000000812 R11: 0000000000000206 R12: 00005556838d4ec0 [ 38.933334] R13: 00007ffdd4d5cbf0 R14: 00007ffdd4d5cc20 R15: 00007ffdd4d5cf80 [ 38.934164] [ 38.934452] [ 38.934675] Allocated by task 212: [ 38.935105] kasan_save_stack+0x22/0x50 [ 38.935586] kasan_set_track+0x25/0x30 [ 38.936088] __kasan_slab_alloc+0x59/0x70 [ 38.936589] kmem_cache_alloc+0x16b/0x370 [ 38.937132] vm_area_dup+0x20/0x160 [ 38.937597] __split_vma+0x170/0x950 [ 38.938088] split_vma+0xc6/0x110 [ 38.938525] mprotect_fixup+0x8d2/0xb30 [ 38.939046] do_mprotect_pkey+0x87e/0xd40 [ 38.939566] __x64_sys_mprotect+0x78/0xc0 [ 38.940103] do_syscall_64+0x3f/0x90 [ 38.940586] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.941236] [ 38.941443] Freed by task 212: [ 38.941863] kasan_save_stack+0x22/0x50 [ 38.942375] kasan_set_track+0x25/0x30 [ 38.942913] kasan_save_free_info+0x2b/0x50 [ 38.943451] __kasan_slab_free+0x10a/0x190 [ 38.944004] kmem_cache_free+0x10d/0x4d0 [ 38.944516] rcu_core+0x8c8/0x2860 [ 38.944991] __do_softirq+0x1b7/0x7d4 [ 38.945474] [ 38.945686] Last potentially related work creation: [ 38.946292] kasan_save_stack+0x22/0x50 [ 38.946855] __kasan_record_aux_stack+0x8e/0xa0 [ 38.947614] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.948275] remove_vma+0x139/0x170 [ 38.948728] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.949306] do_vmi_munmap+0x1f1/0x2b0 [ 38.949815] __vm_munmap+0x138/0x3a0 [ 38.950280] __x64_sys_munmap+0x59/0x80 [ 38.950804] do_syscall_64+0x3f/0x90 [ 38.951284] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.951957] [ 38.952179] Second to last potentially related work creation: [ 38.952900] kasan_save_stack+0x22/0x50 [ 38.953419] __kasan_record_aux_stack+0x8e/0xa0 [ 38.954011] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.954677] remove_vma+0x139/0x170 [ 38.955152] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.955707] do_vmi_munmap+0x1f1/0x2b0 [ 38.956209] mmap_region+0x1f9/0x2660 [ 38.956685] do_mmap+0x854/0xf00 [ 38.957153] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.957649] ksys_mmap_pgoff+0x3af/0x500 [ 38.958155] do_syscall_64+0x3f/0x90 [ 38.958639] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.959307] [ 38.959524] The buggy address belongs to the object at ffff88800df623a0 [ 38.959524] which belongs to the cache vm_area_struct of size 168 [ 38.961036] The buggy address is located 88 bytes inside of [ 38.961036] freed 168-byte region [ffff88800df623a0, ffff88800df62448) [ 38.962500] [ 38.962742] The buggy address belongs to the physical page: [ 38.963434] page:00000000dd12ac8c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdf62 [ 38.964541] memcg:ffff88800edc6301 [ 38.964983] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.965640] page_type: 0xffffffff() [ 38.966108] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 38.967084] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800edc6301 [ 38.968012] page dumped because: kasan: bad access detected [ 38.968683] [ 38.968914] Memory state around the buggy address: [ 38.969504] ffff88800df62280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 38.970384] ffff88800df62300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 38.971280] >ffff88800df62380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 38.972177] ^ [ 38.973056] ffff88800df62400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 38.973919] ffff88800df62480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.974788] ================================================================== [ 38.975724] Disabling lock debugging due to kernel taint [ 40.875613] BUG: Bad rss-counter state mm:000000009cffc109 type:MM_FILEPAGES val:33 [ 40.876848] BUG: Bad rss-counter state mm:000000009cffc109 type:MM_ANONPAGES val:22 [ 41.386819] BUG: Bad rss-counter state mm:000000003e1dac52 type:MM_FILEPAGES val:33 [ 41.387714] BUG: Bad rss-counter state mm:000000003e1dac52 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:13326' (ECDSA) to the list of known hosts. 2023/06/20 18:34:34 fuzzer started 2023/06/20 18:34:34 dialing manager at localhost:36067 2023/06/20 18:34:34 checking machine... 2023/06/20 18:34:34 checking revisions... [ 42.126809] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:34:34 testing simple program... [ 42.173377] cgroup: Unknown subsys name 'net' [ 42.214081] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:34:34 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888008d9fa10 RCX=ffffffff86139701 RDX=1ffff110011b3f53 RSI=ffffffff8180ca5a RDI=ffff888008d9fa1c RBP=ffff888008d9fa98 RSP=ffff888008d9f928 R8 =ffffffff86139748 R9 =ffff888008d9f988 R10=0000000000038001 R11=0000000000020f03 R12=ffff888008d9fa10 R13=0000000000000000 R14=ffff888008d90000 R15=ffff88800cfae080 RIP=ffffffff813ad547 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 0000000000000000 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=00007ffa3ccaf650 CR3=0000000014798000 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=0000000080000000 RBX=000000000000000f RCX=0000000080000000 RDX=ffff888015cc1b40 RSI=ffffffff83723e24 RDI=0000000000000004 RBP=0000000000000010 RSP=ffff888015d2f7b8 R8 =0000000000000004 R9 =000000000000000a R10=000000000000000f R11=00000000000b6a61 R12=000000000000000a R13=ffffffff87f99b58 R14=0000000000000000 R15=0000000000000006 RIP=ffffffff814c0871 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 00007ffa3c6fa900 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=00007ffa3ccb1618 CR3=0000000014798000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000