syzkaller login: [ 70.542831] BUG: Bad rss-counter state mm:00000000f47d6892 type:MM_FILEPAGES val:33 [ 70.544530] BUG: Bad rss-counter state mm:00000000f47d6892 type:MM_ANONPAGES val:22 [ 70.715180] ================================================================== [ 70.716251] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 70.717489] Read of size 8 at addr ffff88800de935c8 by task sshd/219 [ 70.718405] [ 70.718668] CPU: 1 PID: 219 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 70.719948] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 70.720970] Call Trace: [ 70.721297] [ 70.721579] dump_stack_lvl+0x91/0xf0 [ 70.722072] print_report+0xcc/0x620 [ 70.722563] ? __virt_addr_valid+0x102/0x340 [ 70.723143] ? vma_interval_tree_remove+0xc75/0xec0 [ 70.723758] ? vma_interval_tree_remove+0xc75/0xec0 [ 70.724378] kasan_report+0xbe/0xf0 [ 70.724849] ? vma_interval_tree_remove+0xc75/0xec0 [ 70.725471] vma_interval_tree_remove+0xc75/0xec0 [ 70.726071] vma_prepare+0xc54/0x11a0 [ 70.726545] __split_vma+0x5af/0x950 [ 70.727045] ? __pfx___split_vma+0x10/0x10 [ 70.727578] ? find_held_lock+0x2c/0x110 [ 70.728099] do_vmi_align_munmap+0x2ba/0x11f0 [ 70.728669] ? lock_is_held_type+0x9f/0x120 [ 70.729210] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 70.729815] ? mtree_range_walk+0x632/0x900 [ 70.730364] ? mas_walk+0x5c7/0x7c0 [ 70.730855] do_vmi_munmap+0x1f1/0x2b0 [ 70.731345] mmap_region+0x1f9/0x2660 [ 70.731825] ? vm_mmap_pgoff+0x15c/0x3a0 [ 70.732343] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 70.733081] ? __pfx_lock_acquire+0x10/0x10 [ 70.733630] ? __pfx_mmap_region+0x10/0x10 [ 70.734173] ? security_mmap_addr+0x7d/0xa0 [ 70.734698] ? get_unmapped_area+0x1f5/0x3f0 [ 70.735256] do_mmap+0x854/0xf00 [ 70.735701] vm_mmap_pgoff+0x1a6/0x3a0 [ 70.736193] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 70.736755] ksys_mmap_pgoff+0x3af/0x500 [ 70.737265] do_syscall_64+0x3f/0x90 [ 70.737743] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 70.738398] RIP: 0033:0x7f032e7f1d82 [ 70.738885] 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 [ 70.740994] RSP: 002b:00007ffc1d943268 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 70.741906] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f032e7f1d82 [ 70.742747] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f032dc2b000 [ 70.743595] RBP: 00007f032dc2b000 R08: 0000000000000009 R09: 0000000000001000 [ 70.744441] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e5fd4e6b20 [ 70.745275] R13: 00007ffc1d943280 R14: 00007ffc1d9432b0 R15: 00007ffc1d943610 [ 70.746124] [ 70.746415] [ 70.746631] Allocated by task 212: [ 70.747066] kasan_save_stack+0x22/0x50 [ 70.747569] kasan_set_track+0x25/0x30 [ 70.748060] __kasan_slab_alloc+0x59/0x70 [ 70.748581] kmem_cache_alloc+0x16b/0x370 [ 70.749097] vm_area_dup+0x20/0x160 [ 70.749551] __split_vma+0x170/0x950 [ 70.750019] split_vma+0xc6/0x110 [ 70.750459] mprotect_fixup+0x8d2/0xb30 [ 70.750972] do_mprotect_pkey+0x87e/0xd40 [ 70.751489] __x64_sys_mprotect+0x78/0xc0 [ 70.752008] do_syscall_64+0x3f/0x90 [ 70.752475] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 70.753112] [ 70.753332] Freed by task 212: [ 70.753722] kasan_save_stack+0x22/0x50 [ 70.754224] kasan_set_track+0x25/0x30 [ 70.754721] kasan_save_free_info+0x2b/0x50 [ 70.755263] __kasan_slab_free+0x10a/0x190 [ 70.755796] kmem_cache_free+0x10d/0x4d0 [ 70.756301] rcu_core+0x8c8/0x2860 [ 70.756742] __do_softirq+0x1b7/0x7d4 [ 70.757218] [ 70.757433] Last potentially related work creation: [ 70.758068] kasan_save_stack+0x22/0x50 [ 70.758581] __kasan_record_aux_stack+0x8e/0xa0 [ 70.759164] __call_rcu_common.constprop.0+0x6a/0xb90 [ 70.759809] remove_vma+0x139/0x170 [ 70.760260] do_vmi_align_munmap+0xd4a/0x11f0 [ 70.760824] do_vmi_munmap+0x1f1/0x2b0 [ 70.761310] __vm_munmap+0x138/0x3a0 [ 70.761781] __x64_sys_munmap+0x59/0x80 [ 70.762277] do_syscall_64+0x3f/0x90 [ 70.762746] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 70.763400] [ 70.763616] Second to last potentially related work creation: [ 70.764297] kasan_save_stack+0x22/0x50 [ 70.764804] __kasan_record_aux_stack+0x8e/0xa0 [ 70.765368] __call_rcu_common.constprop.0+0x6a/0xb90 [ 70.766018] remove_vma+0x139/0x170 [ 70.766474] do_vmi_align_munmap+0xd4a/0x11f0 [ 70.767040] do_vmi_munmap+0x1f1/0x2b0 [ 70.767528] mmap_region+0x1f9/0x2660 [ 70.768006] do_mmap+0x854/0xf00 [ 70.768439] vm_mmap_pgoff+0x1a6/0x3a0 [ 70.768930] ksys_mmap_pgoff+0x3af/0x500 [ 70.769434] do_syscall_64+0x3f/0x90 [ 70.769905] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 70.770548] [ 70.770763] The buggy address belongs to the object at ffff88800de93570 [ 70.770763] which belongs to the cache vm_area_struct of size 168 [ 70.772250] The buggy address is located 88 bytes inside of [ 70.772250] freed 168-byte region [ffff88800de93570, ffff88800de93618) [ 70.773667] [ 70.773887] The buggy address belongs to the physical page: [ 70.774547] page:00000000a178c9ee refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xde93 [ 70.775707] memcg:ffff88800dee2c01 [ 70.776137] flags: 0x100000000000200(slab|node=0|zone=1) [ 70.776787] page_type: 0xffffffff() [ 70.777242] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 70.778158] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dee2c01 [ 70.779079] page dumped because: kasan: bad access detected [ 70.779737] [ 70.779952] Memory state around the buggy address: [ 70.780533] ffff88800de93480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 70.781391] ffff88800de93500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 70.782256] >ffff88800de93580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 70.783110] ^ [ 70.783775] ffff88800de93600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 70.784626] ffff88800de93680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 70.785484] ================================================================== [ 70.786407] Disabling lock debugging due to kernel taint [ 73.126697] BUG: Bad rss-counter state mm:000000003d64c432 type:MM_FILEPAGES val:33 [ 73.127840] BUG: Bad rss-counter state mm:000000003d64c432 type:MM_ANONPAGES val:22 [ 73.657715] BUG: Bad rss-counter state mm:000000003be167cb type:MM_FILEPAGES val:33 [ 73.658936] BUG: Bad rss-counter state mm:000000003be167cb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:47541' (ECDSA) to the list of known hosts. 2023/06/19 20:21:38 fuzzer started 2023/06/19 20:21:39 dialing manager at localhost:44161 2023/06/19 20:21:39 checking machine... 2023/06/19 20:21:39 checking revisions... [ 74.335791] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:21:39 testing simple program... [ 74.385059] cgroup: Unknown subsys name 'net' [ 74.423896] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:21:06 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffffff813ad420 RCX=ffffffff812d869a RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=ffff88800f2e76e0 RSP=ffff88800f2e7648 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffff88800f2e7710 R13=0000000000000000 R14=ffff888018f0d1c0 R15=0000000000092cc0 RIP=ffffffff810bd06d 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 00007f43c970b900 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=00007f43c9cc30b0 CR3=0000000009728000 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 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=00007fd6dbb78780 CR3=0000000009702000 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=e18c84254514a6a0a74176ade13b1b22 XMM02=ec2efd57dc4c00df0000000000122130 XMM03=7d489485f19cc7b30000000000122200 XMM04=f5ee2fb98244e43c00000000000ae988 XMM05=59d5b690e0af863b000000000013a7f8 XMM06=cf2bbafc895ca8f20000000000139c48 XMM07=e042d86d42eb936e0000000000128e20 XMM08=7d489485f19cc7b30000000000122200 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000