syzkaller login: [ 99.751538] BUG: Bad rss-counter state mm:00000000a4de62b4 type:MM_FILEPAGES val:33 [ 99.752529] BUG: Bad rss-counter state mm:00000000a4de62b4 type:MM_ANONPAGES val:22 [ 99.926684] ================================================================== [ 99.927622] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 99.928597] Read of size 8 at addr ffff8880163b1c20 by task sshd/227 [ 99.929404] [ 99.929721] CPU: 0 PID: 227 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 99.930785] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 99.931794] Call Trace: [ 99.932123] [ 99.932411] dump_stack_lvl+0x91/0xf0 [ 99.932912] print_report+0xcc/0x620 [ 99.933424] ? __virt_addr_valid+0x102/0x340 [ 99.933985] ? vma_interval_tree_remove+0xc75/0xec0 [ 99.934611] ? vma_interval_tree_remove+0xc75/0xec0 [ 99.935251] kasan_report+0xbe/0xf0 [ 99.935743] ? vma_interval_tree_remove+0xc75/0xec0 [ 99.936373] vma_interval_tree_remove+0xc75/0xec0 [ 99.936976] vma_prepare+0xc54/0x11a0 [ 99.937477] __split_vma+0x5af/0x950 [ 99.937962] ? __pfx___split_vma+0x10/0x10 [ 99.938494] ? find_held_lock+0x2c/0x110 [ 99.939031] do_vmi_align_munmap+0x2ba/0x11f0 [ 99.939614] ? lock_is_held_type+0x9f/0x120 [ 99.940158] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 99.940777] ? mtree_range_walk+0x632/0x900 [ 99.941351] ? mas_walk+0x5c7/0x7c0 [ 99.941837] do_vmi_munmap+0x1f1/0x2b0 [ 99.942344] mmap_region+0x1f9/0x2660 [ 99.942834] ? vm_mmap_pgoff+0x15c/0x3a0 [ 99.943352] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 99.944090] ? __pfx_lock_acquire+0x10/0x10 [ 99.944630] ? __pfx_mmap_region+0x10/0x10 [ 99.945177] ? security_mmap_addr+0x7d/0xa0 [ 99.945729] ? get_unmapped_area+0x1f5/0x3f0 [ 99.946302] do_mmap+0x854/0xf00 [ 99.946759] vm_mmap_pgoff+0x1a6/0x3a0 [ 99.947264] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 99.947849] ksys_mmap_pgoff+0x3af/0x500 [ 99.948374] do_syscall_64+0x3f/0x90 [ 99.948867] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 99.949542] RIP: 0033:0x7fd7b9e2fd82 [ 99.950014] 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 [ 99.952207] RSP: 002b:00007fff36c3aa78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 99.953134] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd7b9e2fd82 [ 99.954014] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd7b9269000 [ 99.954877] RBP: 00007fd7b9269000 R08: 0000000000000009 R09: 0000000000001000 [ 99.955741] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ca28c5dec0 [ 99.956597] R13: 00007fff36c3aa90 R14: 00007fff36c3aac0 R15: 00007fff36c3ae20 [ 99.957468] [ 99.957762] [ 99.957984] Allocated by task 220: [ 99.958422] kasan_save_stack+0x22/0x50 [ 99.958937] kasan_set_track+0x25/0x30 [ 99.959442] __kasan_slab_alloc+0x59/0x70 [ 99.959984] kmem_cache_alloc+0x16b/0x370 [ 99.960505] vm_area_dup+0x20/0x160 [ 99.960970] __split_vma+0x170/0x950 [ 99.961461] split_vma+0xc6/0x110 [ 99.961913] mprotect_fixup+0x8d2/0xb30 [ 99.962422] do_mprotect_pkey+0x87e/0xd40 [ 99.962952] __x64_sys_mprotect+0x78/0xc0 [ 99.963486] do_syscall_64+0x3f/0x90 [ 99.963971] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 99.964614] [ 99.964837] Freed by task 202: [ 99.965237] kasan_save_stack+0x22/0x50 [ 99.965749] kasan_set_track+0x25/0x30 [ 99.966249] kasan_save_free_info+0x2b/0x50 [ 99.966800] __kasan_slab_free+0x10a/0x190 [ 99.967335] kmem_cache_free+0x10d/0x4d0 [ 99.967848] rcu_core+0x8c8/0x2860 [ 99.968296] __do_softirq+0x1b7/0x7d4 [ 99.968777] [ 99.968999] Last potentially related work creation: [ 99.969604] kasan_save_stack+0x22/0x50 [ 99.970115] __kasan_record_aux_stack+0x8e/0xa0 [ 99.970693] __call_rcu_common.constprop.0+0x6a/0xb90 [ 99.971352] remove_vma+0x139/0x170 [ 99.971812] do_vmi_align_munmap+0xd4a/0x11f0 [ 99.972376] do_vmi_munmap+0x1f1/0x2b0 [ 99.972868] __vm_munmap+0x138/0x3a0 [ 99.973352] __x64_sys_munmap+0x59/0x80 [ 99.973856] do_syscall_64+0x3f/0x90 [ 99.974337] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 99.974989] [ 99.975203] The buggy address belongs to the object at ffff8880163b1bc8 [ 99.975203] which belongs to the cache vm_area_struct of size 168 [ 99.976676] The buggy address is located 88 bytes inside of [ 99.976676] freed 168-byte region [ffff8880163b1bc8, ffff8880163b1c70) [ 99.978139] [ 99.978358] The buggy address belongs to the physical page: [ 99.979013] page:000000009e9a59af refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x163b1 [ 99.980115] memcg:ffff8880163b0101 [ 99.980550] flags: 0x100000000000200(slab|node=0|zone=1) [ 99.981208] page_type: 0xffffffff() [ 99.981676] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 99.982600] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880163b0101 [ 99.983521] page dumped because: kasan: bad access detected [ 99.984186] [ 99.984404] Memory state around the buggy address: [ 99.984999] ffff8880163b1b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 99.985878] ffff8880163b1b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 99.986740] >ffff8880163b1c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 99.987594] ^ [ 99.988133] ffff8880163b1c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 99.989002] ffff8880163b1d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 99.989886] ================================================================== [ 99.990874] Disabling lock debugging due to kernel taint [ 101.913719] BUG: Bad rss-counter state mm:0000000083f87e28 type:MM_FILEPAGES val:33 [ 101.914751] BUG: Bad rss-counter state mm:0000000083f87e28 type:MM_ANONPAGES val:22 [ 102.346576] BUG: Bad rss-counter state mm:000000009e064aaa type:MM_FILEPAGES val:33 [ 102.347531] BUG: Bad rss-counter state mm:000000009e064aaa type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:18833' (ECDSA) to the list of known hosts. 2023/06/20 07:09:09 fuzzer started 2023/06/20 07:09:09 dialing manager at localhost:44161 2023/06/20 07:09:09 checking machine... 2023/06/20 07:09:09 checking revisions... [ 103.061704] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:09:09 testing simple program... [ 103.112220] cgroup: Unknown subsys name 'net' [ 103.153084] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:08:38 Registers: info registers vcpu 0 RAX=0000000080000001 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff88800dc551c0 RSI=ffffffff81764c3b RDI=0000000000000007 RBP=ffffea00005e6140 RSP=ffff88800fbd7b60 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffff88800f61a0e8 R13=ffffea0000657888 R14=0000000000000000 R15=ffff888016b3dc80 RIP=ffffffff814c07eb RFL=00000293 [--S-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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fe262e8f900 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=00007fe2637eb880 CR3=000000001a7fa000 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=702201f7f4a5416dc6e74312b746476f XMM02=5d6e89638f6070a62e757e92a4e230e8 XMM03=8079454dcb8b2486d885ee9c4ceb1258 XMM04=01030000006173722d68737307000000 XMM05=99718b675441ecf7d9f6893a486cc505 XMM06=0e25d94ae1bf982f13774edd96fa48ee XMM07=c6759586a2ecc0d4790a0ac08e1b6af9 XMM08=b5c41eee97faec0539ecfc781318f217 XMM09=00000000000000070000000000000005 XMM10=629a1f3c4023b540c094de64a0ce3d28 XMM11=b4ce410d2dc752d3bc51280531cb7470 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000040 RBX=ffff88801b9ef910 RCX=ffffffff863b1c01 RDX=1ffff1100373df3e RSI=ffffffff84506c7f RDI=ffff88801b9ef91c RBP=ffff88801b9ef9f0 RSP=ffff88801b9ef828 R8 =ffffffff863b1c9a R9 =ffff88801b9ef888 R10=0000000000038001 R11=000000000008a977 R12=ffff88801b9ef910 R13=0000000000000000 R14=ffff88801646d1c0 R15=0000000000092cc0 RIP=ffffffff813ad503 RFL=00000287 [--S--PC] 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 00007fe9bc096900 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=00007fe9bc64d618 CR3=000000001a7f6000 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