[ 45.735183] BUG: Bad rss-counter state mm:00000000496033ea type:MM_FILEPAGES val:33 [ 45.736583] BUG: Bad rss-counter state mm:00000000496033ea type:MM_ANONPAGES val:22 [ 45.826266] ================================================================== [ 45.827178] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 45.828125] Read of size 8 at addr ffff88800ff56ed8 by task sshd/220 [ 45.828900] [ 45.829115] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 45.830156] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 45.831136] Call Trace: [ 45.831462] [ 45.831748] dump_stack_lvl+0x91/0xf0 [ 45.832237] print_report+0xcc/0x620 [ 45.832729] ? __virt_addr_valid+0x102/0x340 [ 45.833296] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.833953] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.834622] kasan_report+0xbe/0xf0 [ 45.835104] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.835723] vma_interval_tree_remove+0xc75/0xec0 [ 45.836331] vma_prepare+0xc54/0x11a0 [ 45.836819] __split_vma+0x5af/0x950 [ 45.837301] ? __pfx___split_vma+0x10/0x10 [ 45.837826] ? find_held_lock+0x2c/0x110 [ 45.838359] do_vmi_align_munmap+0x2ba/0x11f0 [ 45.838920] ? lock_is_held_type+0x9f/0x120 [ 45.839456] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 45.840058] ? mtree_range_walk+0x632/0x900 [ 45.840604] ? mas_walk+0x5c7/0x7c0 [ 45.841078] do_vmi_munmap+0x1f1/0x2b0 [ 45.841569] mmap_region+0x1f9/0x2660 [ 45.842064] ? vm_mmap_pgoff+0x15c/0x3a0 [ 45.842573] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 45.843298] ? __pfx_lock_acquire+0x10/0x10 [ 45.843834] ? __pfx_mmap_region+0x10/0x10 [ 45.844356] ? security_mmap_addr+0x7d/0xa0 [ 45.844886] ? get_unmapped_area+0x1f5/0x3f0 [ 45.845432] do_mmap+0x854/0xf00 [ 45.845871] vm_mmap_pgoff+0x1a6/0x3a0 [ 45.846380] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 45.846939] ksys_mmap_pgoff+0x3af/0x500 [ 45.847449] do_syscall_64+0x3f/0x90 [ 45.847919] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.848564] RIP: 0033:0x7ff956e0ed82 [ 45.849015] 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 [ 45.851134] RSP: 002b:00007ffc991cf1a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 45.852029] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff956e0ed82 [ 45.852865] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff956248000 [ 45.853707] RBP: 00007ff956248000 R08: 0000000000000009 R09: 0000000000001000 [ 45.854564] R10: 0000000000000812 R11: 0000000000000206 R12: 00005582d4a5bec0 [ 45.855405] R13: 00007ffc991cf1c0 R14: 00007ffc991cf1f0 R15: 00007ffc991cf550 [ 45.856260] [ 45.856550] [ 45.856765] Allocated by task 211: [ 45.857192] kasan_save_stack+0x22/0x50 [ 45.857699] kasan_set_track+0x25/0x30 [ 45.858197] __kasan_slab_alloc+0x59/0x70 [ 45.858719] kmem_cache_alloc+0x16b/0x370 [ 45.859235] vm_area_dup+0x20/0x160 [ 45.859685] __split_vma+0x170/0x950 [ 45.860145] split_vma+0xc6/0x110 [ 45.860579] mprotect_fixup+0x8d2/0xb30 [ 45.861079] do_mprotect_pkey+0x87e/0xd40 [ 45.861594] __x64_sys_mprotect+0x78/0xc0 [ 45.862133] do_syscall_64+0x3f/0x90 [ 45.862604] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.863244] [ 45.863458] Freed by task 211: [ 45.863847] kasan_save_stack+0x22/0x50 [ 45.864352] kasan_set_track+0x25/0x30 [ 45.864848] kasan_save_free_info+0x2b/0x50 [ 45.865377] __kasan_slab_free+0x10a/0x190 [ 45.865905] kmem_cache_free+0x10d/0x4d0 [ 45.866423] rcu_core+0x8c8/0x2860 [ 45.866868] __do_softirq+0x1b7/0x7d4 [ 45.867342] [ 45.867559] Last potentially related work creation: [ 45.868139] kasan_save_stack+0x22/0x50 [ 45.868644] __kasan_record_aux_stack+0x8e/0xa0 [ 45.869217] __call_rcu_common.constprop.0+0x6a/0xb90 [ 45.869851] remove_vma+0x139/0x170 [ 45.870317] do_vmi_align_munmap+0xd4a/0x11f0 [ 45.870873] do_vmi_munmap+0x1f1/0x2b0 [ 45.871355] __vm_munmap+0x138/0x3a0 [ 45.871818] __x64_sys_munmap+0x59/0x80 [ 45.872312] do_syscall_64+0x3f/0x90 [ 45.872780] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.873419] [ 45.873633] Second to last potentially related work creation: [ 45.874337] kasan_save_stack+0x22/0x50 [ 45.874842] __kasan_record_aux_stack+0x8e/0xa0 [ 45.875416] __call_rcu_common.constprop.0+0x6a/0xb90 [ 45.876060] remove_vma+0x139/0x170 [ 45.876512] do_vmi_align_munmap+0xd4a/0x11f0 [ 45.877065] do_vmi_munmap+0x1f1/0x2b0 [ 45.877550] mmap_region+0x1f9/0x2660 [ 45.878034] do_mmap+0x854/0xf00 [ 45.878471] vm_mmap_pgoff+0x1a6/0x3a0 [ 45.878961] ksys_mmap_pgoff+0x3af/0x500 [ 45.879461] do_syscall_64+0x3f/0x90 [ 45.879937] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.880577] [ 45.880797] The buggy address belongs to the object at ffff88800ff56e80 [ 45.880797] which belongs to the cache vm_area_struct of size 168 [ 45.882273] The buggy address is located 88 bytes inside of [ 45.882273] freed 168-byte region [ffff88800ff56e80, ffff88800ff56f28) [ 45.883655] [ 45.883870] The buggy address belongs to the physical page: [ 45.884526] page:00000000e0685420 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xff56 [ 45.885602] memcg:ffff8880101a2601 [ 45.886031] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 45.886729] page_type: 0xffffffff() [ 45.887179] raw: 0100000000000200 ffff88800879fc80 ffffea00005bfd00 dead000000000007 [ 45.888101] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880101a2601 [ 45.889013] page dumped because: kasan: bad access detected [ 45.889671] [ 45.889888] Memory state around the buggy address: [ 45.890476] ffff88800ff56d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 45.891334] ffff88800ff56e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 45.892197] >ffff88800ff56e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 45.893056] ^ [ 45.893795] ffff88800ff56f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 45.894663] ffff88800ff56f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 45.895503] ================================================================== [ 45.896886] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 48.300934] BUG: Bad rss-counter state mm:00000000085b3517 type:MM_FILEPAGES val:33 [ 48.301922] BUG: Bad rss-counter state mm:00000000085b3517 type:MM_ANONPAGES val:22 [ 48.805326] BUG: Bad rss-counter state mm:00000000762daf04 type:MM_FILEPAGES val:33 [ 48.806370] BUG: Bad rss-counter state mm:00000000762daf04 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:34300' (ECDSA) to the list of known hosts. 2023/06/19 18:53:48 fuzzer started 2023/06/19 18:53:48 dialing manager at localhost:44161 2023/06/19 18:53:48 checking machine... 2023/06/19 18:53:48 checking revisions... [ 49.573309] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:53:48 testing simple program... [ 49.619378] cgroup: Unknown subsys name 'net' [ 49.666878] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:53:26 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=0000000000000001 RDX=1ffff110011aff3b RSI=ffffffff8120674f RDI=ffff888008d7f978 RBP=ffff888008d7f9d0 RSP=ffff888008d7f908 R8 =0000000000000001 R9 =ffff888008d7f9b8 R10=0000000000038001 R11=000000000000a1ff R12=ffff888008d7f9d8 R13=ffff888008d7f9c0 R14=ffff888008d70000 R15=ffff888008d7f978 RIP=ffffffff81130682 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 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=00007f5152ede650 CR3=000000000eb46000 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=ffffffff00ffffffffffffffffffffff XMM01=707465675f6c697475646f6d6d61705f XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88800fbde000 RCX=0000000000000000 RDX=1ffff11001f7bcaf RSI=ffffffff8165646b RDI=ffff88800fbde578 RBP=ffffea0000629b40 RSP=ffff88801479f9d0 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6c88 R12=0000000000000293 R13=ffff888015ced420 R14=ffff88800ff10000 R15=0000000000000000 RIP=ffffffff81656487 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f53f01a0900 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=00007f53ef673d28 CR3=000000000d7aa000 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=656e6e6f637369443d4547415353454d XMM01=2e303120746f6f722072657375206d6f XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=dcb3fa8ddf1430c300000000000ae988 XMM05=1b1f96e207f7fea40000000000135738 XMM06=4fda316b135da52b0000000000134198 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000