[ 34.146239] BUG: Bad rss-counter state mm:000000005440f1a2 type:MM_FILEPAGES val:33 [ 34.147245] BUG: Bad rss-counter state mm:000000005440f1a2 type:MM_ANONPAGES val:22 [ 34.312048] ================================================================== [ 34.313091] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.314320] Read of size 8 at addr ffff8880191c3ed8 by task sshd/226 [ 34.315207] [ 34.315457] CPU: 0 PID: 226 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.316456] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.317591] Call Trace: [ 34.317961] [ 34.318294] dump_stack_lvl+0x91/0xf0 [ 34.318859] print_report+0xcc/0x620 [ 34.319411] ? __virt_addr_valid+0x102/0x340 [ 34.320040] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.320741] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.321439] kasan_report+0xbe/0xf0 [ 34.321979] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.322712] vma_interval_tree_remove+0xc75/0xec0 [ 34.323401] vma_prepare+0xc54/0x11a0 [ 34.323959] __split_vma+0x5af/0x950 [ 34.324493] ? __pfx___split_vma+0x10/0x10 [ 34.325093] ? find_held_lock+0x2c/0x110 [ 34.325684] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.326335] ? lock_is_held_type+0x9f/0x120 [ 34.326957] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.327674] ? mtree_range_walk+0x632/0x900 [ 34.328320] ? mas_walk+0x5c7/0x7c0 [ 34.328878] do_vmi_munmap+0x1f1/0x2b0 [ 34.329458] mmap_region+0x1f9/0x2660 [ 34.330030] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.330640] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.331488] ? __pfx_lock_acquire+0x10/0x10 [ 34.332125] ? __pfx_mmap_region+0x10/0x10 [ 34.332749] ? security_mmap_addr+0x7d/0xa0 [ 34.333375] ? get_unmapped_area+0x1f5/0x3f0 [ 34.334024] do_mmap+0x854/0xf00 [ 34.334609] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.335178] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.335813] ksys_mmap_pgoff+0x3af/0x500 [ 34.336394] do_syscall_64+0x3f/0x90 [ 34.336941] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.337671] RIP: 0033:0x7f663814bd82 [ 34.338194] 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 [ 34.340611] RSP: 002b:00007fffc4b34ae8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.341627] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f663814bd82 [ 34.342627] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6637585000 [ 34.343602] RBP: 00007f6637585000 R08: 0000000000000009 R09: 0000000000001000 [ 34.344566] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559e0f70bec0 [ 34.345522] R13: 00007fffc4b34b00 R14: 00007fffc4b34b30 R15: 00007fffc4b34e90 [ 34.346497] [ 34.346829] [ 34.347075] Allocated by task 217: [ 34.347560] kasan_save_stack+0x22/0x50 [ 34.348137] kasan_set_track+0x25/0x30 [ 34.348704] __kasan_slab_alloc+0x59/0x70 [ 34.349297] kmem_cache_alloc+0x16b/0x370 [ 34.349881] vm_area_dup+0x20/0x160 [ 34.350396] __split_vma+0x170/0x950 [ 34.350930] split_vma+0xc6/0x110 [ 34.351426] mprotect_fixup+0x8d2/0xb30 [ 34.352001] do_mprotect_pkey+0x87e/0xd40 [ 34.352614] __x64_sys_mprotect+0x78/0xc0 [ 34.353249] do_syscall_64+0x3f/0x90 [ 34.353827] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.354661] [ 34.354919] Freed by task 217: [ 34.355389] kasan_save_stack+0x22/0x50 [ 34.355995] kasan_set_track+0x25/0x30 [ 34.356593] kasan_save_free_info+0x2b/0x50 [ 34.357257] __kasan_slab_free+0x10a/0x190 [ 34.357901] kmem_cache_free+0x10d/0x4d0 [ 34.358523] rcu_core+0x8c8/0x2860 [ 34.359074] __do_softirq+0x1b7/0x7d4 [ 34.359636] [ 34.359896] Last potentially related work creation: [ 34.360601] kasan_save_stack+0x22/0x50 [ 34.361210] __kasan_record_aux_stack+0x8e/0xa0 [ 34.361892] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.362657] remove_vma+0x139/0x170 [ 34.363185] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.363843] do_vmi_munmap+0x1f1/0x2b0 [ 34.364417] __vm_munmap+0x138/0x3a0 [ 34.364978] __x64_sys_munmap+0x59/0x80 [ 34.365565] do_syscall_64+0x3f/0x90 [ 34.366127] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.366903] [ 34.367161] The buggy address belongs to the object at ffff8880191c3e80 [ 34.367161] which belongs to the cache vm_area_struct of size 168 [ 34.368901] The buggy address is located 88 bytes inside of [ 34.368901] freed 168-byte region [ffff8880191c3e80, ffff8880191c3f28) [ 34.370543] [ 34.370797] The buggy address belongs to the physical page: [ 34.371571] page:000000009649240a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x191c3 [ 34.372878] memcg:ffff88800e462701 [ 34.373378] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.374136] page_type: 0xffffffff() [ 34.374672] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 34.375752] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e462701 [ 34.376760] page dumped because: kasan: bad access detected [ 34.377502] [ 34.377737] Memory state around the buggy address: [ 34.378395] ffff8880191c3d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 34.379339] ffff8880191c3e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 34.380283] >ffff8880191c3e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.381225] ^ [ 34.382026] ffff8880191c3f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 34.382988] ffff8880191c3f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 34.383941] ================================================================== [ 34.385152] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 36.147162] BUG: Bad rss-counter state mm:00000000b4c3c22e type:MM_FILEPAGES val:33 [ 36.147870] BUG: Bad rss-counter state mm:00000000b4c3c22e type:MM_ANONPAGES val:22 [ 36.608395] BUG: Bad rss-counter state mm:00000000716990f8 type:MM_FILEPAGES val:33 [ 36.609363] BUG: Bad rss-counter state mm:00000000716990f8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:58518' (ECDSA) to the list of known hosts. 2023/06/20 09:23:28 fuzzer started 2023/06/20 09:23:28 dialing manager at localhost:44161 2023/06/20 09:23:28 checking machine... 2023/06/20 09:23:28 checking revisions... [ 37.340541] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:23:28 testing simple program... [ 37.388529] cgroup: Unknown subsys name 'net' [ 37.497086] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:23:24 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff818d570d RDX=0000000000008d57 RSI=0000000000008d57 RDI=ffffffff8650b11c RBP=ffff8880142cf320 RSP=ffff8880142cf258 R8 =0000000000000000 R9 =ffff8880142cf308 R10=0000000000038001 R11=0000000000024091 R12=ffff8880142cf328 R13=ffff8880142cf310 R14=ffff8880142cf309 R15=ffff8880142cf2c8 RIP=ffffffff8113077a RFL=00000213 [----A-C] 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 00007f41fc31d900 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=00007f41fb83d020 CR3=000000000c7c6000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=282cdae08d44605500000000000ae988 XMM05=c8ffef68507a6cd70000000000134da8 XMM06=6860aeb314f8829d00000000001338d0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0bb7082 RBX=ffffffff85db8414 RCX=ffffffff81370a39 RDX=0000000000000000 RSI=ffffffff860d0c26 RDI=ffffffff85db8410 RBP=ffffffff85db8410 RSP=ffff88806cf099b8 R8 =ffffffff860d0c26 R9 =ffff88806cf09ab0 R10=0000000000038001 R11=000000000000fc0f R12=ffffffff85db8418 R13=ffffffff85db8410 R14=ffffffff85db8410 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000217 [----APC] 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 00007fb8e13ee900 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=00007fb8e19a5618 CR3=0000000016efe000 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=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