[ 31.657563] BUG: Bad rss-counter state mm:00000000a5820c4e type:MM_FILEPAGES val:33 [ 31.659698] BUG: Bad rss-counter state mm:00000000a5820c4e type:MM_ANONPAGES val:22 [ 31.831829] ================================================================== [ 31.832757] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.833706] Read of size 8 at addr ffff88800e5d3d08 by task sshd/219 [ 31.834663] [ 31.834886] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.835785] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.836780] Call Trace: [ 31.837100] [ 31.837384] dump_stack_lvl+0x91/0xf0 [ 31.837881] print_report+0xcc/0x620 [ 31.838365] ? __virt_addr_valid+0x102/0x340 [ 31.838923] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.839564] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.840180] kasan_report+0xbe/0xf0 [ 31.840655] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.841281] vma_interval_tree_remove+0xc75/0xec0 [ 31.841889] vma_prepare+0xc54/0x11a0 [ 31.842377] __split_vma+0x5af/0x950 [ 31.842851] ? __pfx___split_vma+0x10/0x10 [ 31.843396] ? find_held_lock+0x2c/0x110 [ 31.843919] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.844483] ? lock_is_held_type+0x9f/0x120 [ 31.845027] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.845643] ? mtree_range_walk+0x632/0x900 [ 31.846204] ? mas_walk+0x5c7/0x7c0 [ 31.846691] do_vmi_munmap+0x1f1/0x2b0 [ 31.847209] mmap_region+0x1f9/0x2660 [ 31.847697] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.848218] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.848932] ? __pfx_lock_acquire+0x10/0x10 [ 31.849464] ? __pfx_mmap_region+0x10/0x10 [ 31.849998] ? security_mmap_addr+0x7d/0xa0 [ 31.850529] ? get_unmapped_area+0x1f5/0x3f0 [ 31.851095] do_mmap+0x854/0xf00 [ 31.851537] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.852032] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.852607] ksys_mmap_pgoff+0x3af/0x500 [ 31.853129] do_syscall_64+0x3f/0x90 [ 31.853636] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.854296] RIP: 0033:0x7f64a2980d82 [ 31.854766] 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 [ 31.856951] RSP: 002b:00007ffe9768b6a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.857861] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f64a2980d82 [ 31.858715] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f64a1dba000 [ 31.859565] RBP: 00007f64a1dba000 R08: 0000000000000009 R09: 0000000000001000 [ 31.860418] R10: 0000000000000812 R11: 0000000000000206 R12: 000056207f2ead90 [ 31.861279] R13: 00007ffe9768b6c0 R14: 00007ffe9768b6f0 R15: 00007ffe9768ba50 [ 31.862135] [ 31.862430] [ 31.862651] Allocated by task 212: [ 31.863094] kasan_save_stack+0x22/0x50 [ 31.863603] kasan_set_track+0x25/0x30 [ 31.864107] __kasan_slab_alloc+0x59/0x70 [ 31.864629] kmem_cache_alloc+0x16b/0x370 [ 31.865144] vm_area_dup+0x20/0x160 [ 31.865602] __split_vma+0x170/0x950 [ 31.866070] split_vma+0xc6/0x110 [ 31.866516] mprotect_fixup+0x8d2/0xb30 [ 31.867030] do_mprotect_pkey+0x87e/0xd40 [ 31.867552] __x64_sys_mprotect+0x78/0xc0 [ 31.868076] do_syscall_64+0x3f/0x90 [ 31.868559] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.869201] [ 31.869414] Freed by task 212: [ 31.869807] kasan_save_stack+0x22/0x50 [ 31.870317] kasan_set_track+0x25/0x30 [ 31.870816] kasan_save_free_info+0x2b/0x50 [ 31.871372] __kasan_slab_free+0x10a/0x190 [ 31.871908] kmem_cache_free+0x10d/0x4d0 [ 31.872419] rcu_core+0x8c8/0x2860 [ 31.872867] __do_softirq+0x1b7/0x7d4 [ 31.873353] [ 31.873571] Last potentially related work creation: [ 31.874153] kasan_save_stack+0x22/0x50 [ 31.874673] __kasan_record_aux_stack+0x8e/0xa0 [ 31.875270] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.875982] remove_vma+0x139/0x170 [ 31.876435] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.877002] do_vmi_munmap+0x1f1/0x2b0 [ 31.877488] __vm_munmap+0x138/0x3a0 [ 31.877966] __x64_sys_munmap+0x59/0x80 [ 31.878459] do_syscall_64+0x3f/0x90 [ 31.878933] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.879591] [ 31.879806] Second to last potentially related work creation: [ 31.880490] kasan_save_stack+0x22/0x50 [ 31.880999] __kasan_record_aux_stack+0x8e/0xa0 [ 31.881584] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.882230] remove_vma+0x139/0x170 [ 31.882693] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.883277] do_vmi_munmap+0x1f1/0x2b0 [ 31.883771] mmap_region+0x1f9/0x2660 [ 31.884262] do_mmap+0x854/0xf00 [ 31.884694] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.885181] ksys_mmap_pgoff+0x3af/0x500 [ 31.885711] do_syscall_64+0x3f/0x90 [ 31.886189] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.886836] [ 31.887061] The buggy address belongs to the object at ffff88800e5d3cb0 [ 31.887061] which belongs to the cache vm_area_struct of size 168 [ 31.888540] The buggy address is located 88 bytes inside of [ 31.888540] freed 168-byte region [ffff88800e5d3cb0, ffff88800e5d3d58) [ 31.889979] [ 31.890199] The buggy address belongs to the physical page: [ 31.890862] page:00000000f6d45def refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe5d3 [ 31.891987] memcg:ffff88800cd8ad01 [ 31.892417] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.893066] page_type: 0xffffffff() [ 31.893518] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 31.894442] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cd8ad01 [ 31.895365] page dumped because: kasan: bad access detected [ 31.896030] [ 31.896249] Memory state around the buggy address: [ 31.896827] ffff88800e5d3c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.897677] ffff88800e5d3c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.898529] >ffff88800e5d3d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.899385] ^ [ 31.899823] ffff88800e5d3d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.900670] ffff88800e5d3e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 31.901512] ================================================================== [ 31.902425] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 34.075376] BUG: Bad rss-counter state mm:00000000d0836d97 type:MM_FILEPAGES val:33 [ 34.076600] BUG: Bad rss-counter state mm:00000000d0836d97 type:MM_ANONPAGES val:22 [ 34.589566] BUG: Bad rss-counter state mm:00000000bfc5e441 type:MM_FILEPAGES val:33 [ 34.590566] BUG: Bad rss-counter state mm:00000000bfc5e441 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:52261' (ECDSA) to the list of known hosts. 2023/06/21 05:25:53 fuzzer started 2023/06/21 05:25:53 dialing manager at localhost:36067 2023/06/21 05:25:53 checking machine... 2023/06/21 05:25:53 checking revisions... [ 35.367594] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:25:54 testing simple program... [ 35.397023] cgroup: Unknown subsys name 'net' [ 35.459461] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:25:53 Registers: info registers vcpu 0 RAX=0000000000000002 RBX=0000000000000001 RCX=ffffffff863b356c RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff88801ca47a88 RSP=ffff88801ca479c0 R8 =ffffffff863b3570 R9 =ffff88801ca47a70 R10=0000000000038001 R11=000000000008a966 R12=ffff88801ca47a90 R13=ffff88801ca47a78 R14=ffff88801ca47f20 R15=ffff88801ca47a30 RIP=ffffffff81130bc1 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 00007f8ab1812900 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=00007f8ab1dc9618 CR3=000000000eea4000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff8614dcd9 RBX=0000000000000001 RCX=ffffffff8614dcd6 RDX=0000000000000000 RSI=0000000000000000 RDI=ffffffff8614dcd8 RBP=ffff888014337570 RSP=ffff8880143374a8 R8 =1ffffffff0c29b9b R9 =ffff888014337558 R10=0000000000038001 R11=000000000002454d R12=ffff888014337578 R13=ffff888014337560 R14=ffff888014337a28 R15=ffff888014337518 RIP=ffffffff811311d7 RFL=00000212 [----A--] 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 00007f62f1436900 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=00007f62f09459f0 CR3=000000000e53a000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=b3357429675238c300000000000ae988 XMM05=da609e20c499a26f0000000000132ed8 XMM06=dfcdbad4f1609c370000000000131a20 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000