[ 23.823863] BUG: Bad rss-counter state mm:000000003e117e08 type:MM_FILEPAGES val:33 [ 23.825076] BUG: Bad rss-counter state mm:000000003e117e08 type:MM_ANONPAGES val:22 [ 23.868897] ================================================================== [ 23.869968] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.871093] Read of size 8 at addr ffff88800f256310 by task sshd/219 [ 23.872133] [ 23.872358] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.873261] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.874249] Call Trace: [ 23.874574] [ 23.874864] dump_stack_lvl+0x91/0xf0 [ 23.875363] print_report+0xcc/0x620 [ 23.875854] ? __virt_addr_valid+0x102/0x340 [ 23.876409] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.877043] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.877666] kasan_report+0xbe/0xf0 [ 23.878140] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.878757] vma_interval_tree_remove+0xc75/0xec0 [ 23.879365] vma_prepare+0xc54/0x11a0 [ 23.879843] __split_vma+0x5af/0x950 [ 23.880314] ? __pfx___split_vma+0x10/0x10 [ 23.880874] ? find_held_lock+0x2c/0x110 [ 23.881398] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.881959] ? lock_is_held_type+0x9f/0x120 [ 23.882502] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.883109] ? mtree_range_walk+0x632/0x900 [ 23.883662] ? mas_walk+0x5c7/0x7c0 [ 23.884133] do_vmi_munmap+0x1f1/0x2b0 [ 23.884625] mmap_region+0x1f9/0x2660 [ 23.885121] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.885638] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.886351] ? __pfx_lock_acquire+0x10/0x10 [ 23.886887] ? __pfx_mmap_region+0x10/0x10 [ 23.887427] ? security_mmap_addr+0x7d/0xa0 [ 23.887965] ? get_unmapped_area+0x1f5/0x3f0 [ 23.888522] do_mmap+0x854/0xf00 [ 23.888984] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.889485] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.890053] ksys_mmap_pgoff+0x3af/0x500 [ 23.890558] do_syscall_64+0x3f/0x90 [ 23.891049] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.891705] RIP: 0033:0x7f5f2e26ed82 [ 23.892165] 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 [ 23.894311] RSP: 002b:00007ffffd123dd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.895223] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5f2e26ed82 [ 23.896072] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5f2d6a8000 [ 23.896924] RBP: 00007f5f2d6a8000 R08: 0000000000000009 R09: 0000000000001000 [ 23.897769] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e9c9f5bf70 [ 23.898616] R13: 00007ffffd123df0 R14: 00007ffffd123e20 R15: 00007ffffd124180 [ 23.899465] [ 23.899759] [ 23.899980] Allocated by task 212: [ 23.900404] kasan_save_stack+0x22/0x50 [ 23.900938] kasan_set_track+0x25/0x30 [ 23.901432] __kasan_slab_alloc+0x59/0x70 [ 23.901957] kmem_cache_alloc+0x16b/0x370 [ 23.902481] vm_area_dup+0x20/0x160 [ 23.902944] __split_vma+0x170/0x950 [ 23.903414] split_vma+0xc6/0x110 [ 23.903862] mprotect_fixup+0x8d2/0xb30 [ 23.904362] do_mprotect_pkey+0x87e/0xd40 [ 23.904893] __x64_sys_mprotect+0x78/0xc0 [ 23.905409] do_syscall_64+0x3f/0x90 [ 23.905888] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.906534] [ 23.906752] Freed by task 212: [ 23.907140] kasan_save_stack+0x22/0x50 [ 23.907640] kasan_set_track+0x25/0x30 [ 23.908132] kasan_save_free_info+0x2b/0x50 [ 23.908687] __kasan_slab_free+0x10a/0x190 [ 23.909218] kmem_cache_free+0x10d/0x4d0 [ 23.909731] rcu_core+0x8c8/0x2860 [ 23.910182] __do_softirq+0x1b7/0x7d4 [ 23.910669] [ 23.910891] Last potentially related work creation: [ 23.911475] kasan_save_stack+0x22/0x50 [ 23.911982] __kasan_record_aux_stack+0x8e/0xa0 [ 23.912658] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.913313] remove_vma+0x139/0x170 [ 23.913762] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.914322] do_vmi_munmap+0x1f1/0x2b0 [ 23.914810] __vm_munmap+0x138/0x3a0 [ 23.915278] __x64_sys_munmap+0x59/0x80 [ 23.915770] do_syscall_64+0x3f/0x90 [ 23.916244] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.916891] [ 23.917109] The buggy address belongs to the object at ffff88800f2562b8 [ 23.917109] which belongs to the cache vm_area_struct of size 168 [ 23.918577] The buggy address is located 88 bytes inside of [ 23.918577] freed 168-byte region [ffff88800f2562b8, ffff88800f256360) [ 23.919982] [ 23.920201] The buggy address belongs to the physical page: [ 23.920878] page:00000000773c75ba refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf256 [ 23.921948] memcg:ffff88800f4a8f01 [ 23.922377] flags: 0x100000000000200(slab|node=0|zone=1) [ 23.923022] page_type: 0xffffffff() [ 23.923479] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 23.924412] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f4a8f01 [ 23.925333] page dumped because: kasan: bad access detected [ 23.926001] [ 23.926219] Memory state around the buggy address: [ 23.926799] ffff88800f256200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 23.927677] ffff88800f256280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 23.928558] >ffff88800f256300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 23.929420] ^ [ 23.929894] ffff88800f256380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 23.930753] ffff88800f256400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 23.931605] ================================================================== [ 23.932564] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.183216] BUG: Bad rss-counter state mm:000000004c31cf8d type:MM_FILEPAGES val:33 [ 26.184393] BUG: Bad rss-counter state mm:000000004c31cf8d type:MM_ANONPAGES val:22 [ 26.675134] BUG: Bad rss-counter state mm:0000000015fa95ff type:MM_FILEPAGES val:33 [ 26.676367] BUG: Bad rss-counter state mm:0000000015fa95ff type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:57664' (ECDSA) to the list of known hosts. 2023/06/20 22:53:36 fuzzer started 2023/06/20 22:53:37 dialing manager at localhost:36067 2023/06/20 22:53:37 checking machine... 2023/06/20 22:53:37 checking revisions... [ 27.392052] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:53:37 testing simple program... [ 27.429924] cgroup: Unknown subsys name 'net' [ 27.490387] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:53:36 Registers: info registers vcpu 0 RAX=0000000000000034 RBX=00007f4198007bc0 RCX=0000000000062870 RDX=0000000000000000 RSI=00005644efb5c9c0 RDI=00007f4198007a70 RBP=000000000000004e RSP=00007f419df93670 R8 =00007f4198007a70 R9 =0000000000000640 R10=a3d70a3d70a3d70b R11=0000000000000000 R12=0000000000000000 R13=0000000000000000 R14=000000000000004d R15=000000000000004e RIP=00005644ef780c74 RFL=00000297 [--S-APC] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f419df9f700 00000000 00000000 GS =0000 0000000000000000 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=00007faa56a882a0 CR3=000000000d75e000 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=33353a3232203032206e754a3e38333c XMM01=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3832325b646873732036333a3335 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343439 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff8880166cf928 RBX=0000000000000001 RCX=ffff8880166cf9c8 RDX=1ffff11002cd9f2e RSI=ffff8880166cf8f8 RDI=ffff8880166cf928 RBP=ffff8880166cf980 RSP=ffff8880166cf868 R8 =0000000000000001 R9 =ffff8880166cf968 R10=0000000000038001 R11=0000000000006097 R12=ffffed1002cd9f27 R13=ffff8880166cf970 R14=ffff8880166cf970 R15=ffff8880166cf928 RIP=ffffffff81130664 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 00007f31f0a80900 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=00007f31f10380b0 CR3=000000000e220000 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