Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 31.174453] BUG: Bad rss-counter state mm:00000000a8e53ee9 type:MM_FILEPAGES val:33 [ 31.175414] BUG: Bad rss-counter state mm:00000000a8e53ee9 type:MM_ANONPAGES val:22 [ 31.337494] ================================================================== [ 31.338586] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.339732] Read of size 8 at addr ffff88800df4d3f8 by task sshd/219 [ 31.340682] [ 31.340940] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.341999] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.343202] Call Trace: [ 31.343598] [ 31.343960] dump_stack_lvl+0x91/0xf0 [ 31.344555] print_report+0xcc/0x620 [ 31.345152] ? __virt_addr_valid+0x102/0x340 [ 31.345815] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.346574] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.347326] kasan_report+0xbe/0xf0 [ 31.347936] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.348697] vma_interval_tree_remove+0xc75/0xec0 [ 31.349431] vma_prepare+0xc54/0x11a0 [ 31.350026] __split_vma+0x5af/0x950 [ 31.350598] ? __pfx___split_vma+0x10/0x10 [ 31.351228] ? find_held_lock+0x2c/0x110 [ 31.351853] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.352564] ? lock_is_held_type+0x9f/0x120 [ 31.353235] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.353984] ? mtree_range_walk+0x632/0x900 [ 31.354675] ? mas_walk+0x5c7/0x7c0 [ 31.355248] do_vmi_munmap+0x1f1/0x2b0 [ 31.355842] mmap_region+0x1f9/0x2660 [ 31.356446] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.357074] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.357952] ? __pfx_lock_acquire+0x10/0x10 [ 31.358614] ? __pfx_mmap_region+0x10/0x10 [ 31.359263] ? security_mmap_addr+0x7d/0xa0 [ 31.359921] ? get_unmapped_area+0x1f5/0x3f0 [ 31.360594] do_mmap+0x854/0xf00 [ 31.361134] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.361735] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.362417] ksys_mmap_pgoff+0x3af/0x500 [ 31.363036] do_syscall_64+0x3f/0x90 [ 31.363611] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.364405] RIP: 0033:0x7f133fd73d82 [ 31.364969] 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 [ 31.367561] RSP: 002b:00007ffd032761f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.368714] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f133fd73d82 [ 31.369748] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f133f1ad000 [ 31.370798] RBP: 00007f133f1ad000 R08: 0000000000000009 R09: 0000000000001000 [ 31.371847] R10: 0000000000000812 R11: 0000000000000206 R12: 00005639a46e9b20 [ 31.372900] R13: 00007ffd03276210 R14: 00007ffd03276240 R15: 00007ffd032765a0 [ 31.373956] [ 31.374315] [ 31.374575] Allocated by task 212: [ 31.375105] kasan_save_stack+0x22/0x50 [ 31.375714] kasan_set_track+0x25/0x30 [ 31.376328] __kasan_slab_alloc+0x59/0x70 [ 31.376959] kmem_cache_alloc+0x16b/0x370 [ 31.377588] vm_area_dup+0x20/0x160 [ 31.378143] __split_vma+0x170/0x950 [ 31.378720] split_vma+0xc6/0x110 [ 31.379260] mprotect_fixup+0x8d2/0xb30 [ 31.379887] do_mprotect_pkey+0x87e/0xd40 [ 31.380527] __x64_sys_mprotect+0x78/0xc0 [ 31.381162] do_syscall_64+0x3f/0x90 [ 31.381742] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.382518] [ 31.382780] Freed by task 212: [ 31.383264] kasan_save_stack+0x22/0x50 [ 31.383888] kasan_set_track+0x25/0x30 [ 31.384493] kasan_save_free_info+0x2b/0x50 [ 31.385144] __kasan_slab_free+0x10a/0x190 [ 31.385780] kmem_cache_free+0x10d/0x4d0 [ 31.386388] rcu_core+0x8c8/0x2860 [ 31.386926] __do_softirq+0x1b7/0x7d4 [ 31.387510] [ 31.387770] Last potentially related work creation: [ 31.388502] kasan_save_stack+0x22/0x50 [ 31.389119] __kasan_record_aux_stack+0x8e/0xa0 [ 31.389823] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.390605] remove_vma+0x139/0x170 [ 31.391159] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.391847] do_vmi_munmap+0x1f1/0x2b0 [ 31.392450] __vm_munmap+0x138/0x3a0 [ 31.393025] __x64_sys_munmap+0x59/0x80 [ 31.393631] do_syscall_64+0x3f/0x90 [ 31.394217] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.395012] [ 31.395277] Second to last potentially related work creation: [ 31.396148] kasan_save_stack+0x22/0x50 [ 31.396772] __kasan_record_aux_stack+0x8e/0xa0 [ 31.397488] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.398262] remove_vma+0x139/0x170 [ 31.398814] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.399496] do_vmi_munmap+0x1f1/0x2b0 [ 31.400108] mmap_region+0x1f9/0x2660 [ 31.400686] do_mmap+0x854/0xf00 [ 31.401215] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.401810] ksys_mmap_pgoff+0x3af/0x500 [ 31.402416] do_syscall_64+0x3f/0x90 [ 31.402990] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.403791] [ 31.404069] The buggy address belongs to the object at ffff88800df4d3a0 [ 31.404069] which belongs to the cache vm_area_struct of size 168 [ 31.405878] The buggy address is located 88 bytes inside of [ 31.405878] freed 168-byte region [ffff88800df4d3a0, ffff88800df4d448) [ 31.407607] [ 31.407890] The buggy address belongs to the physical page: [ 31.408722] page:00000000e733430d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdf4d [ 31.410058] memcg:ffff88800e11d101 [ 31.410588] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.411463] page_type: 0xffffffff() [ 31.412021] raw: 0100000000000200 ffff8880087a0c80 ffffea000034c7c0 dead000000000003 [ 31.413152] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e11d101 [ 31.414259] page dumped because: kasan: bad access detected [ 31.415072] [ 31.415336] Memory state around the buggy address: [ 31.416046] ffff88800df4d280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 31.417121] ffff88800df4d300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 31.418172] >ffff88800df4d380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.419215] ^ [ 31.420220] ffff88800df4d400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.421020] ffff88800df4d480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.421824] ================================================================== [ 31.422989] Disabling lock debugging due to kernel taint [ 33.124239] BUG: Bad rss-counter state mm:00000000bd4d9b1a type:MM_FILEPAGES val:33 [ 33.124892] BUG: Bad rss-counter state mm:00000000bd4d9b1a type:MM_ANONPAGES val:22 [ 33.502268] BUG: Bad rss-counter state mm:00000000e685ae9b type:MM_FILEPAGES val:33 [ 33.503485] BUG: Bad rss-counter state mm:00000000e685ae9b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:46190' (ECDSA) to the list of known hosts. 2023/06/21 07:22:52 fuzzer started 2023/06/21 07:22:52 dialing manager at localhost:36067 2023/06/21 07:22:52 checking machine... 2023/06/21 07:22:52 checking revisions... [ 34.072092] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:22:52 testing simple program... [ 34.102481] cgroup: Unknown subsys name 'net' [ 34.146734] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:22:52 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000100 RDX=ffffffff8542a6c0 RSI=ffffffff814c857a RDI=0000000000000005 RBP=0000000000000000 RSP=ffff88806ce09a18 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b54e7 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85652c08 R15=ffff88800d1b2080 RIP=ffffffff813744b6 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=00007fffb03f6fc8 CR3=0000000005482000 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=00007f5c8740c510000055ec26757790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=0000000000000000 RDX=ffff888019ff0000 RSI=ffffffff836828d0 RDI=0000000000000001 RBP=ffff88801a0da000 RSP=ffff88800eb27808 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=00000000000b6a61 R12=ffffffff838671e6 R13=0000000000000000 R14=ffff8880147f8579 R15=ffff8880147f8600 RIP=ffffffff814c089b 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 00007f551d737900 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=00007f551dcee618 CR3=00000000181dc000 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