[ 23.879443] BUG: Bad rss-counter state mm:000000001ae0e79a type:MM_FILEPAGES val:33 [ 23.880668] BUG: Bad rss-counter state mm:000000001ae0e79a type:MM_ANONPAGES val:22 [ 23.916140] ================================================================== [ 23.916829] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.917555] Read of size 8 at addr ffff888016673140 by task sshd/220 [ 23.918148] [ 23.918313] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.918983] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.919721] Call Trace: [ 23.919962] [ 23.920178] dump_stack_lvl+0x91/0xf0 [ 23.920559] print_report+0xcc/0x620 [ 23.921035] ? __virt_addr_valid+0x102/0x340 [ 23.921462] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.921933] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.922409] kasan_report+0xbe/0xf0 [ 23.922770] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.923266] vma_interval_tree_remove+0xc75/0xec0 [ 23.923728] vma_prepare+0xc54/0x11a0 [ 23.924064] __split_vma+0x5af/0x950 [ 23.924321] ? __pfx___split_vma+0x10/0x10 [ 23.924609] ? find_held_lock+0x2c/0x110 [ 23.924893] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.925203] ? lock_is_held_type+0x9f/0x120 [ 23.925506] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.925846] ? mtree_range_walk+0x632/0x900 [ 23.926153] ? mas_walk+0x5c7/0x7c0 [ 23.926419] do_vmi_munmap+0x1f1/0x2b0 [ 23.926691] mmap_region+0x1f9/0x2660 [ 23.926957] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.927245] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.927636] ? __pfx_lock_acquire+0x10/0x10 [ 23.927926] ? __pfx_mmap_region+0x10/0x10 [ 23.928216] ? security_mmap_addr+0x7d/0xa0 [ 23.928511] ? get_unmapped_area+0x1f5/0x3f0 [ 23.928814] do_mmap+0x854/0xf00 [ 23.929055] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.929335] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.929637] ksys_mmap_pgoff+0x3af/0x500 [ 23.929916] do_syscall_64+0x3f/0x90 [ 23.930176] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.930534] RIP: 0033:0x7efdabe08d82 [ 23.930787] 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 [ 23.931976] RSP: 002b:00007fff00865328 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.932474] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007efdabe08d82 [ 23.932936] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007efdab242000 [ 23.933412] RBP: 00007efdab242000 R08: 0000000000000009 R09: 0000000000001000 [ 23.933881] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fec900aec0 [ 23.934351] R13: 00007fff00865340 R14: 00007fff00865370 R15: 00007fff008656d0 [ 23.934828] [ 23.934990] [ 23.935111] Allocated by task 208: [ 23.935351] kasan_save_stack+0x22/0x50 [ 23.935633] kasan_set_track+0x25/0x30 [ 23.935901] __kasan_slab_alloc+0x59/0x70 [ 23.936193] kmem_cache_alloc+0x16b/0x370 [ 23.936477] vm_area_dup+0x20/0x160 [ 23.936726] __split_vma+0x170/0x950 [ 23.936988] split_vma+0xc6/0x110 [ 23.937234] mprotect_fixup+0x8d2/0xb30 [ 23.937520] do_mprotect_pkey+0x87e/0xd40 [ 23.937810] __x64_sys_mprotect+0x78/0xc0 [ 23.938097] do_syscall_64+0x3f/0x90 [ 23.938359] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.938714] [ 23.938833] Freed by task 208: [ 23.939047] kasan_save_stack+0x22/0x50 [ 23.939319] kasan_set_track+0x25/0x30 [ 23.939589] kasan_save_free_info+0x2b/0x50 [ 23.939881] __kasan_slab_free+0x10a/0x190 [ 23.940175] kmem_cache_free+0x10d/0x4d0 [ 23.940448] rcu_core+0x8c8/0x2860 [ 23.940692] __do_softirq+0x1b7/0x7d4 [ 23.940957] [ 23.941074] Last potentially related work creation: [ 23.941411] kasan_save_stack+0x22/0x50 [ 23.941692] __kasan_record_aux_stack+0x8e/0xa0 [ 23.942006] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.942359] remove_vma+0x139/0x170 [ 23.942611] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.942919] do_vmi_munmap+0x1f1/0x2b0 [ 23.943189] __vm_munmap+0x138/0x3a0 [ 23.943445] __x64_sys_munmap+0x59/0x80 [ 23.943725] do_syscall_64+0x3f/0x90 [ 23.943990] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.944342] [ 23.944459] Second to last potentially related work creation: [ 23.944837] kasan_save_stack+0x22/0x50 [ 23.945109] __kasan_record_aux_stack+0x8e/0xa0 [ 23.945429] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.945790] remove_vma+0x139/0x170 [ 23.946037] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.946342] do_vmi_munmap+0x1f1/0x2b0 [ 23.946606] mmap_region+0x1f9/0x2660 [ 23.946875] do_mmap+0x854/0xf00 [ 23.947115] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.947384] ksys_mmap_pgoff+0x3af/0x500 [ 23.947662] do_syscall_64+0x3f/0x90 [ 23.947919] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.948277] [ 23.948396] The buggy address belongs to the object at ffff8880166730e8 [ 23.948396] which belongs to the cache vm_area_struct of size 168 [ 23.949211] The buggy address is located 88 bytes inside of [ 23.949211] freed 168-byte region [ffff8880166730e8, ffff888016673190) [ 23.949989] [ 23.950108] The buggy address belongs to the physical page: [ 23.950473] page:000000006972866d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16673 [ 23.951089] memcg:ffff88800f0ca401 [ 23.951322] flags: 0x100000000000200(slab|node=0|zone=1) [ 23.951678] page_type: 0xffffffff() [ 23.951925] raw: 0100000000000200 ffff8880087a0c80 ffffea0000595940 dead000000000008 [ 23.952426] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f0ca401 [ 23.952925] page dumped because: kasan: bad access detected [ 23.953301] [ 23.953421] Memory state around the buggy address: [ 23.953739] ffff888016673000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 23.954202] ffff888016673080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 23.954674] >ffff888016673100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.955136] ^ [ 23.955492] ffff888016673180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 23.955973] ffff888016673200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 23.956448] ================================================================== [ 23.957002] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.086542] BUG: Bad rss-counter state mm:000000008c10ac58 type:MM_FILEPAGES val:33 [ 26.087733] BUG: Bad rss-counter state mm:000000008c10ac58 type:MM_ANONPAGES val:22 [ 26.523067] BUG: Bad rss-counter state mm:000000006844f807 type:MM_FILEPAGES val:33 [ 26.524072] BUG: Bad rss-counter state mm:000000006844f807 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:43994' (ECDSA) to the list of known hosts. 2023/06/21 01:28:40 fuzzer started 2023/06/21 01:28:40 dialing manager at localhost:36067 2023/06/21 01:28:40 checking machine... 2023/06/21 01:28:40 checking revisions... [ 27.241056] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:28:41 testing simple program... [ 27.290084] cgroup: Unknown subsys name 'net' [ 27.382136] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:28:40 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=00007fffaf0d2fb0 RCX=00007fffaf0d2f50 RDX=00007fffaf0d2fb0 RSI=0000000000000000 RDI=0000000064925248 RBP=0000000000000001 RSP=00007fffaf0d2f30 R8 =00007fffaf0d2fb0 R9 =00005653526e9120 R10=00007fffaf0d2e56 R11=0000000000000000 R12=0000000064925248 R13=00007fffaf0d3090 R14=0000000000000002 R15=00005653526c28b0 RIP=00007fc9c97329c2 RFL=00000246 [---Z-P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fc9c9285900 00000000 00000000 GS =0000 0000000000000000 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=00007fc9c983a650 CR3=000000000eff6000 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=ffffffffffffffffffffffffff000000 XMM01=00000000000000003043545500435455 XMM02=00000000ff000000000000000000ff00 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=5d64255b00205425206525206825003e XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff863b4bcb RBX=0000000000000001 RCX=ffffffff863b4bc8 RDX=0000000000000000 RSI=0000000000000000 RDI=ffffffff863b4bca RBP=ffff88800f407840 RSP=ffff88800f407778 R8 =0000000000000001 R9 =ffff88800f407828 R10=0000000000038001 R11=000000000008ad20 R12=ffff88800f407848 R13=ffff88800f407830 R14=ffff88800f407d50 R15=ffff88800f4077e8 RIP=ffffffff811311ed 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 00007fc9c9285900 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=00007fc9c983c618 CR3=000000000eff6000 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