syzkaller login: [ 38.909110] BUG: Bad rss-counter state mm:0000000003b05c95 type:MM_FILEPAGES val:33 [ 38.909920] BUG: Bad rss-counter state mm:0000000003b05c95 type:MM_ANONPAGES val:22 [ 38.938956] ================================================================== [ 38.939648] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.940314] Read of size 8 at addr ffff888014156b38 by task sshd/219 [ 38.941013] [ 38.941167] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.941896] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.942675] Call Trace: [ 38.942921] [ 38.943165] dump_stack_lvl+0x91/0xf0 [ 38.943597] print_report+0xcc/0x620 [ 38.944001] ? __virt_addr_valid+0x102/0x340 [ 38.944492] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.944895] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.945296] kasan_report+0xbe/0xf0 [ 38.945621] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.946009] vma_interval_tree_remove+0xc75/0xec0 [ 38.946420] vma_prepare+0xc54/0x11a0 [ 38.946748] __split_vma+0x5af/0x950 [ 38.947049] ? __pfx___split_vma+0x10/0x10 [ 38.947386] ? find_held_lock+0x2c/0x110 [ 38.947718] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.948079] ? lock_is_held_type+0x9f/0x120 [ 38.948428] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.948886] ? mtree_range_walk+0x632/0x900 [ 38.949249] ? mas_walk+0x5c7/0x7c0 [ 38.949556] do_vmi_munmap+0x1f1/0x2b0 [ 38.949872] mmap_region+0x1f9/0x2660 [ 38.950187] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.950520] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.950980] ? __pfx_lock_acquire+0x10/0x10 [ 38.951332] ? __pfx_mmap_region+0x10/0x10 [ 38.951719] ? security_mmap_addr+0x7d/0xa0 [ 38.952347] ? get_unmapped_area+0x1f5/0x3f0 [ 38.952762] do_mmap+0x854/0xf00 [ 38.953062] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.953426] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.953823] ksys_mmap_pgoff+0x3af/0x500 [ 38.954155] do_syscall_64+0x3f/0x90 [ 38.954495] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.954924] RIP: 0033:0x7f8fdbec5d82 [ 38.955228] 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 [ 38.956678] RSP: 002b:00007fff73040c58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.957267] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8fdbec5d82 [ 38.957856] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8fdb2ff000 [ 38.958424] RBP: 00007f8fdb2ff000 R08: 0000000000000009 R09: 0000000000001000 [ 38.958976] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f50aec1d90 [ 38.959531] R13: 00007fff73040c70 R14: 00007fff73040ca0 R15: 00007fff73041000 [ 38.960088] [ 38.960276] [ 38.960414] Allocated by task 212: [ 38.960714] kasan_save_stack+0x22/0x50 [ 38.961068] kasan_set_track+0x25/0x30 [ 38.961428] __kasan_slab_alloc+0x59/0x70 [ 38.961769] kmem_cache_alloc+0x16b/0x370 [ 38.962099] vm_area_dup+0x20/0x160 [ 38.962422] __split_vma+0x170/0x950 [ 38.962734] split_vma+0xc6/0x110 [ 38.963022] mprotect_fixup+0x8d2/0xb30 [ 38.963366] do_mprotect_pkey+0x87e/0xd40 [ 38.963761] __x64_sys_mprotect+0x78/0xc0 [ 38.964168] do_syscall_64+0x3f/0x90 [ 38.964562] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.965067] [ 38.965227] Freed by task 212: [ 38.965511] kasan_save_stack+0x22/0x50 [ 38.965853] kasan_set_track+0x25/0x30 [ 38.966173] kasan_save_free_info+0x2b/0x50 [ 38.966558] __kasan_slab_free+0x10a/0x190 [ 38.966922] kmem_cache_free+0x10d/0x4d0 [ 38.967294] rcu_core+0x8c8/0x2860 [ 38.967687] __do_softirq+0x1b7/0x7d4 [ 38.968078] [ 38.968256] Last potentially related work creation: [ 38.968758] kasan_save_stack+0x22/0x50 [ 38.969122] __kasan_record_aux_stack+0x8e/0xa0 [ 38.969507] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.969938] remove_vma+0x139/0x170 [ 38.970251] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.970662] do_vmi_munmap+0x1f1/0x2b0 [ 38.971029] __vm_munmap+0x138/0x3a0 [ 38.971391] __x64_sys_munmap+0x59/0x80 [ 38.971739] do_syscall_64+0x3f/0x90 [ 38.972065] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.972578] [ 38.972734] Second to last potentially related work creation: [ 38.973228] kasan_save_stack+0x22/0x50 [ 38.973605] __kasan_record_aux_stack+0x8e/0xa0 [ 38.974003] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.974453] remove_vma+0x139/0x170 [ 38.974772] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.975180] do_vmi_munmap+0x1f1/0x2b0 [ 38.975534] mmap_region+0x1f9/0x2660 [ 38.975870] do_mmap+0x854/0xf00 [ 38.976180] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.976567] ksys_mmap_pgoff+0x3af/0x500 [ 38.976908] do_syscall_64+0x3f/0x90 [ 38.977240] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.977696] [ 38.977831] The buggy address belongs to the object at ffff888014156ae0 [ 38.977831] which belongs to the cache vm_area_struct of size 168 [ 38.978842] The buggy address is located 88 bytes inside of [ 38.978842] freed 168-byte region [ffff888014156ae0, ffff888014156b88) [ 38.979837] [ 38.979972] The buggy address belongs to the physical page: [ 38.980421] page:000000003c45c6a6 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff8880141560e8 pfn:0x14156 [ 38.981313] memcg:ffff888014163e01 [ 38.981621] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.982075] page_type: 0xffffffff() [ 38.982395] raw: 0100000000000200 ffff8880087a0c80 ffffea000031d500 dead000000000006 [ 38.983016] raw: ffff8880141560e8 0000000080110008 00000001ffffffff ffff888014163e01 [ 38.983632] page dumped because: kasan: bad access detected [ 38.984062] [ 38.984198] Memory state around the buggy address: [ 38.984610] ffff888014156a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.985207] ffff888014156a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 38.985815] >ffff888014156b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.986350] ^ [ 38.986745] ffff888014156b80: fb fc fc fc fc fc fc fc fc fb fb fb fb fb fb fb [ 38.987316] ffff888014156c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 38.987891] ================================================================== [ 38.988727] Disabling lock debugging due to kernel taint [ 40.794517] BUG: Bad rss-counter state mm:0000000005bb84cd type:MM_FILEPAGES val:33 [ 40.795247] BUG: Bad rss-counter state mm:0000000005bb84cd type:MM_ANONPAGES val:22 [ 41.162504] BUG: Bad rss-counter state mm:0000000088a80ec9 type:MM_FILEPAGES val:33 [ 41.163181] BUG: Bad rss-counter state mm:0000000088a80ec9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:30931' (ECDSA) to the list of known hosts. 2023/06/21 09:29:03 fuzzer started 2023/06/21 09:29:03 dialing manager at localhost:36067 2023/06/21 09:29:03 checking machine... 2023/06/21 09:29:03 checking revisions... [ 41.753185] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:29:03 testing simple program... [ 41.786492] cgroup: Unknown subsys name 'net' [ 41.834238] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:29:03 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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 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=00007fff457fc258 CR3=0000000005482000 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=00007f1a592565100000558264393790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff888013044180 RCX=0000000000000000 RDX=1ffff11002608830 RSI=ffffffff81f4d536 RDI=ffff88800ffc8120 RBP=ffff88800fb77c38 RSP=ffff88800fb77a58 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000000 R12=ffff88800ffc8008 R13=ffff88800fb77c3c R14=00000000000002f1 R15=0000000000001032 RIP=ffffffff81f4d5a1 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 00007f48585c8900 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=00007f4858b800b0 CR3=0000000009430000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000