[ 25.567505] BUG: Bad rss-counter state mm:000000009fd6b6e9 type:MM_FILEPAGES val:33 [ 25.568518] BUG: Bad rss-counter state mm:000000009fd6b6e9 type:MM_ANONPAGES val:22 [ 25.726848] ================================================================== [ 25.727785] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 25.728717] Read of size 8 at addr ffff88800cc4ab38 by task sshd/218 [ 25.729490] [ 25.729712] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 25.730704] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 25.731695] Call Trace: [ 25.732015] [ 25.732300] dump_stack_lvl+0x91/0xf0 [ 25.732791] print_report+0xcc/0x620 [ 25.733273] ? __virt_addr_valid+0x102/0x340 [ 25.733831] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.734442] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.735059] kasan_report+0xbe/0xf0 [ 25.735544] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.736169] vma_interval_tree_remove+0xc75/0xec0 [ 25.736768] vma_prepare+0xc54/0x11a0 [ 25.737245] __split_vma+0x5af/0x950 [ 25.737714] ? __pfx___split_vma+0x10/0x10 [ 25.738250] ? find_held_lock+0x2c/0x110 [ 25.738769] do_vmi_align_munmap+0x2ba/0x11f0 [ 25.739345] ? lock_is_held_type+0x9f/0x120 [ 25.739885] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 25.740488] ? mtree_range_walk+0x632/0x900 [ 25.741041] ? mas_walk+0x5c7/0x7c0 [ 25.741517] do_vmi_munmap+0x1f1/0x2b0 [ 25.742006] mmap_region+0x1f9/0x2660 [ 25.742487] ? vm_mmap_pgoff+0x15c/0x3a0 [ 25.743000] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 25.743730] ? __pfx_lock_acquire+0x10/0x10 [ 25.744260] ? __pfx_mmap_region+0x10/0x10 [ 25.744795] ? security_mmap_addr+0x7d/0xa0 [ 25.745322] ? get_unmapped_area+0x1f5/0x3f0 [ 25.745873] do_mmap+0x854/0xf00 [ 25.746309] vm_mmap_pgoff+0x1a6/0x3a0 [ 25.746802] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 25.747372] ksys_mmap_pgoff+0x3af/0x500 [ 25.747882] do_syscall_64+0x3f/0x90 [ 25.748359] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.749006] RIP: 0033:0x7fc498c91d82 [ 25.749464] 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 [ 25.751588] RSP: 002b:00007fff2431c168 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 25.752485] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc498c91d82 [ 25.753331] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc4980cb000 [ 25.754179] RBP: 00007fc4980cb000 R08: 0000000000000009 R09: 0000000000001000 [ 25.755028] R10: 0000000000000812 R11: 0000000000000206 R12: 00005598e8f60f70 [ 25.755886] R13: 00007fff2431c180 R14: 00007fff2431c1b0 R15: 00007fff2431c510 [ 25.756748] [ 25.757037] [ 25.757253] Allocated by task 211: [ 25.757685] kasan_save_stack+0x22/0x50 [ 25.758196] kasan_set_track+0x25/0x30 [ 25.758689] __kasan_slab_alloc+0x59/0x70 [ 25.759227] kmem_cache_alloc+0x16b/0x370 [ 25.759750] vm_area_dup+0x20/0x160 [ 25.760206] __split_vma+0x170/0x950 [ 25.760681] split_vma+0xc6/0x110 [ 25.761122] mprotect_fixup+0x8d2/0xb30 [ 25.761628] do_mprotect_pkey+0x87e/0xd40 [ 25.762152] __x64_sys_mprotect+0x78/0xc0 [ 25.762673] do_syscall_64+0x3f/0x90 [ 25.763167] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.763810] [ 25.764025] Freed by task 211: [ 25.764420] kasan_save_stack+0x22/0x50 [ 25.764921] kasan_set_track+0x25/0x30 [ 25.765416] kasan_save_free_info+0x2b/0x50 [ 25.765953] __kasan_slab_free+0x10a/0x190 [ 25.766536] kmem_cache_free+0x10d/0x4d0 [ 25.767073] rcu_core+0x8c8/0x2860 [ 25.767528] __do_softirq+0x1b7/0x7d4 [ 25.768007] [ 25.768221] Last potentially related work creation: [ 25.768805] kasan_save_stack+0x22/0x50 [ 25.769312] __kasan_record_aux_stack+0x8e/0xa0 [ 25.769888] __call_rcu_common.constprop.0+0x6a/0xb90 [ 25.770528] remove_vma+0x139/0x170 [ 25.770982] do_vmi_align_munmap+0xd4a/0x11f0 [ 25.771560] do_vmi_munmap+0x1f1/0x2b0 [ 25.772053] __vm_munmap+0x138/0x3a0 [ 25.772520] __x64_sys_munmap+0x59/0x80 [ 25.773015] do_syscall_64+0x3f/0x90 [ 25.773488] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.774136] [ 25.774358] Second to last potentially related work creation: [ 25.775040] kasan_save_stack+0x22/0x50 [ 25.775559] __kasan_record_aux_stack+0x8e/0xa0 [ 25.776138] __call_rcu_common.constprop.0+0x6a/0xb90 [ 25.776783] remove_vma+0x139/0x170 [ 25.777236] do_vmi_align_munmap+0xd4a/0x11f0 [ 25.777789] do_vmi_munmap+0x1f1/0x2b0 [ 25.778278] mmap_region+0x1f9/0x2660 [ 25.778756] do_mmap+0x854/0xf00 [ 25.779196] vm_mmap_pgoff+0x1a6/0x3a0 [ 25.779683] ksys_mmap_pgoff+0x3af/0x500 [ 25.780178] do_syscall_64+0x3f/0x90 [ 25.780651] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.781291] [ 25.781508] The buggy address belongs to the object at ffff88800cc4aae0 [ 25.781508] which belongs to the cache vm_area_struct of size 168 [ 25.782974] The buggy address is located 88 bytes inside of [ 25.782974] freed 168-byte region [ffff88800cc4aae0, ffff88800cc4ab88) [ 25.784851] [ 25.785134] The buggy address belongs to the physical page: [ 25.785976] page:000000004836c23e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcc4a [ 25.787377] memcg:ffff88800df03801 [ 25.787902] flags: 0x100000000000200(slab|node=0|zone=1) [ 25.788710] page_type: 0xffffffff() [ 25.789292] raw: 0100000000000200 ffff88800879fc80 ffffea0000359940 dead000000000006 [ 25.790450] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800df03801 [ 25.791615] page dumped because: kasan: bad access detected [ 25.792463] [ 25.792721] Memory state around the buggy address: [ 25.793465] ffff88800cc4aa00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 25.794579] ffff88800cc4aa80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 25.795647] >ffff88800cc4ab00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 25.796703] ^ [ 25.797477] ffff88800cc4ab80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 25.798559] ffff88800cc4ac00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 25.799644] ================================================================== [ 25.800858] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 27.649670] BUG: Bad rss-counter state mm:000000000a7d4fce type:MM_FILEPAGES val:33 [ 27.650290] BUG: Bad rss-counter state mm:000000000a7d4fce type:MM_ANONPAGES val:22 [ 28.097611] BUG: Bad rss-counter state mm:00000000e0c2dc49 type:MM_FILEPAGES val:33 [ 28.098789] BUG: Bad rss-counter state mm:00000000e0c2dc49 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:41185' (ECDSA) to the list of known hosts. 2023/06/20 04:14:23 fuzzer started 2023/06/20 04:14:23 dialing manager at localhost:44161 2023/06/20 04:14:23 checking machine... 2023/06/20 04:14:23 checking revisions... [ 28.808361] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:14:23 testing simple program... [ 28.864259] cgroup: Unknown subsys name 'net' [ 28.900887] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:14:21 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88806cf3a540 RCX=ffff888008d71b78 RDX=ffffed10011aff73 RSI=0000000000000008 RDI=ffff888008d7fb90 RBP=0000000000000000 RSP=ffff888008d7fb60 R8 =0000000000000001 R9 =ffffed10011aff72 R10=ffff888008d7fb97 R11=1ffff1100d9c7479 R12=ffff888008d71b78 R13=1ffff110011aff6e R14=1ffff110011ae36f R15=ffff888008d7fb90 RIP=ffffffff8216bc8c RFL=00000046 [---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=00007f1041511000 CR3=000000000ca4e000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=e7284b6005918b4500000000000ae988 XMM05=d8247f26198a4d490000000000136e80 XMM06=bdf2e299e47b49d50000000000135630 XMM07=fb795ef6d65770560000000000124bc0 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff11001a416f1 RBX=ffff88800cbe7788 RCX=1ffff1100197cef8 RDX=1ffff1100197cf3d RSI=ffffffff87b86f80 RDI=ffff88800d24db28 RBP=ffff88800d24db18 RSP=ffff88800f237748 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6996 R12=ffff88800cbe79e8 R13=dffffc0000000000 R14=ffff88800d20b788 R15=ffff88800cbe7980 RIP=ffffffff844cde82 RFL=00000046 [---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 00007fc90c586900 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=00007ffc964f2000 CR3=00000000166fe000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000