[ 30.078242] BUG: Bad rss-counter state mm:000000007cac056d type:MM_FILEPAGES val:33 [ 30.079015] BUG: Bad rss-counter state mm:000000007cac056d type:MM_ANONPAGES val:22 [ 30.284129] ================================================================== [ 30.285652] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.287526] Read of size 8 at addr ffff88800dadd880 by task sshd/222 [ 30.289034] [ 30.289449] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.291117] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.292964] Call Trace: [ 30.293541] [ 30.294042] dump_stack_lvl+0x91/0xf0 [ 30.294934] print_report+0xcc/0x620 [ 30.295763] ? __virt_addr_valid+0x102/0x340 [ 30.296757] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.297900] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.299045] kasan_report+0xbe/0xf0 [ 30.299859] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.300965] vma_interval_tree_remove+0xc75/0xec0 [ 30.302033] vma_prepare+0xc54/0x11a0 [ 30.302891] __split_vma+0x5af/0x950 [ 30.303757] ? __pfx___split_vma+0x10/0x10 [ 30.304690] ? find_held_lock+0x2c/0x110 [ 30.305614] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.306654] ? lock_is_held_type+0x9f/0x120 [ 30.307607] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.308695] ? mtree_range_walk+0x632/0x900 [ 30.309688] ? mas_walk+0x5c7/0x7c0 [ 30.310506] do_vmi_munmap+0x1f1/0x2b0 [ 30.311368] mmap_region+0x1f9/0x2660 [ 30.312215] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.313129] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.314450] ? __pfx_lock_acquire+0x10/0x10 [ 30.315426] ? __pfx_mmap_region+0x10/0x10 [ 30.316406] ? security_mmap_addr+0x7d/0xa0 [ 30.317352] ? get_unmapped_area+0x1f5/0x3f0 [ 30.318364] do_mmap+0x854/0xf00 [ 30.319135] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.320015] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.320994] ksys_mmap_pgoff+0x3af/0x500 [ 30.321885] do_syscall_64+0x3f/0x90 [ 30.322726] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.323900] RIP: 0033:0x7fe0996a4d82 [ 30.324747] 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 [ 30.328887] RSP: 002b:00007fffb4f742b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.330579] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe0996a4d82 [ 30.332200] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe098ade000 [ 30.333799] RBP: 00007fe098ade000 R08: 0000000000000009 R09: 0000000000001000 [ 30.336017] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556230b78d90 [ 30.336563] R13: 00007fffb4f742d0 R14: 00007fffb4f74300 R15: 00007fffb4f74660 [ 30.337194] [ 30.337381] [ 30.337520] Allocated by task 213: [ 30.337793] kasan_save_stack+0x22/0x50 [ 30.338124] kasan_set_track+0x25/0x30 [ 30.338455] __kasan_slab_alloc+0x59/0x70 [ 30.338792] kmem_cache_alloc+0x16b/0x370 [ 30.339123] vm_area_dup+0x20/0x160 [ 30.339413] __split_vma+0x170/0x950 [ 30.339709] split_vma+0xc6/0x110 [ 30.340002] mprotect_fixup+0x8d2/0xb30 [ 30.340323] do_mprotect_pkey+0x87e/0xd40 [ 30.340660] __x64_sys_mprotect+0x78/0xc0 [ 30.340997] do_syscall_64+0x3f/0x90 [ 30.341306] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.341714] [ 30.341858] Freed by task 204: [ 30.342136] kasan_save_stack+0x22/0x50 [ 30.342495] kasan_set_track+0x25/0x30 [ 30.342817] kasan_save_free_info+0x2b/0x50 [ 30.343158] __kasan_slab_free+0x10a/0x190 [ 30.343503] kmem_cache_free+0x10d/0x4d0 [ 30.343833] rcu_core+0x8c8/0x2860 [ 30.344121] __do_softirq+0x1b7/0x7d4 [ 30.344428] [ 30.344569] Last potentially related work creation: [ 30.344967] kasan_save_stack+0x22/0x50 [ 30.345315] __kasan_record_aux_stack+0x8e/0xa0 [ 30.345678] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.346093] remove_vma+0x139/0x170 [ 30.346432] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.346791] do_vmi_munmap+0x1f1/0x2b0 [ 30.347102] __vm_munmap+0x138/0x3a0 [ 30.347401] __x64_sys_munmap+0x59/0x80 [ 30.347719] do_syscall_64+0x3f/0x90 [ 30.348033] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.348446] [ 30.348587] Second to last potentially related work creation: [ 30.349031] kasan_save_stack+0x22/0x50 [ 30.349375] __kasan_record_aux_stack+0x8e/0xa0 [ 30.349739] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.350178] remove_vma+0x139/0x170 [ 30.350502] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.350870] do_vmi_munmap+0x1f1/0x2b0 [ 30.351186] mmap_region+0x1f9/0x2660 [ 30.351492] do_mmap+0x854/0xf00 [ 30.351771] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.352087] ksys_mmap_pgoff+0x3af/0x500 [ 30.352406] do_syscall_64+0x3f/0x90 [ 30.352715] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.353138] [ 30.353278] The buggy address belongs to the object at ffff88800dadd828 [ 30.353278] which belongs to the cache vm_area_struct of size 168 [ 30.354273] The buggy address is located 88 bytes inside of [ 30.354273] freed 168-byte region [ffff88800dadd828, ffff88800dadd8d0) [ 30.355171] [ 30.355315] The buggy address belongs to the physical page: [ 30.355733] page:00000000363c5f04 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdadd [ 30.356432] memcg:ffff88800dd3e501 [ 30.356709] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.357133] page_type: 0xffffffff() [ 30.357422] raw: 0100000000000200 ffff8880087a0c80 ffffea00003586c0 dead000000000008 [ 30.357998] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dd3e501 [ 30.358578] page dumped because: kasan: bad access detected [ 30.358990] [ 30.359128] Memory state around the buggy address: [ 30.359527] ffff88800dadd780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 30.360066] ffff88800dadd800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.360609] >ffff88800dadd880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.361142] ^ [ 30.361401] ffff88800dadd900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.361943] ffff88800dadd980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc 00 [ 30.362532] ================================================================== [ 30.363244] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 34.950704] BUG: Bad rss-counter state mm:0000000052b8af5b type:MM_FILEPAGES val:33 [ 34.952433] BUG: Bad rss-counter state mm:0000000052b8af5b type:MM_ANONPAGES val:22 [ 36.364628] BUG: Bad rss-counter state mm:00000000cc101312 type:MM_FILEPAGES val:33 [ 36.365252] BUG: Bad rss-counter state mm:00000000cc101312 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:19884' (ECDSA) to the list of known hosts. 2023/06/21 10:23:12 fuzzer started 2023/06/21 10:23:12 dialing manager at localhost:36067 2023/06/21 10:23:12 checking machine... 2023/06/21 10:23:12 checking revisions... [ 37.303694] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:23:13 testing simple program... [ 37.364807] cgroup: Unknown subsys name 'net' [ 37.449304] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:23:12 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff110011b3f60 RSI=ffffffff8100455c RDI=ffff888008d9f978 RBP=ffff888008d9fa10 RSP=ffff888008d9f978 R8 =0000000000000001 R9 =ffff888008d9f9b8 R10=0000000000038001 R11=0000000000009bf7 R12=ffff888008d9fa40 R13=0000000000000000 R14=ffff888008d90000 R15=ffff888018ceba00 RIP=ffffffff810bd052 RFL=00000002 [-------] 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=00007f0f4230e780 CR3=000000000d6e0000 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=ff000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000000000 XMM04=964d4be38c3ce10a00000000001343b8 XMM05=d3fdd5f48436fbd700000000000aead0 XMM06=3ad9ef8208e212d400000000000ae988 XMM07=a1fcdcf819d7e1e500000000000ae728 XMM08=44495f474f4c5359530069253d595449 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007fff9e1a1efa CR3=000000000c4fc000 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=ffffffffffff00000000000000000000 XMM02=ffffffffffff00000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000073707574726174732064 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000