[ 24.865154] BUG: Bad rss-counter state mm:00000000d47c721a type:MM_FILEPAGES val:33 [ 24.865923] BUG: Bad rss-counter state mm:00000000d47c721a type:MM_ANONPAGES val:22 [ 24.900601] ================================================================== [ 24.901364] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.902159] Read of size 8 at addr ffff888015b94a50 by task sshd/219 [ 24.902814] [ 24.903000] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 24.903730] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.904704] Call Trace: [ 24.904978] [ 24.905216] dump_stack_lvl+0x91/0xf0 [ 24.905622] print_report+0xcc/0x620 [ 24.906031] ? __virt_addr_valid+0x102/0x340 [ 24.906489] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.907012] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.907526] kasan_report+0xbe/0xf0 [ 24.907922] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.908462] vma_interval_tree_remove+0xc75/0xec0 [ 24.908979] vma_prepare+0xc54/0x11a0 [ 24.909321] __split_vma+0x5af/0x950 [ 24.909657] ? __pfx___split_vma+0x10/0x10 [ 24.910051] ? find_held_lock+0x2c/0x110 [ 24.910380] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.910706] ? lock_is_held_type+0x9f/0x120 [ 24.911087] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.911487] ? mtree_range_walk+0x632/0x900 [ 24.911805] ? mas_walk+0x5c7/0x7c0 [ 24.912095] do_vmi_munmap+0x1f1/0x2b0 [ 24.912378] mmap_region+0x1f9/0x2660 [ 24.912669] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.912987] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.913399] ? __pfx_lock_acquire+0x10/0x10 [ 24.913705] ? __pfx_mmap_region+0x10/0x10 [ 24.914025] ? security_mmap_addr+0x7d/0xa0 [ 24.914330] ? get_unmapped_area+0x1f5/0x3f0 [ 24.914644] do_mmap+0x854/0xf00 [ 24.914908] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.915188] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.915507] ksys_mmap_pgoff+0x3af/0x500 [ 24.915795] do_syscall_64+0x3f/0x90 [ 24.916066] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.916442] RIP: 0033:0x7f5e97db8d82 [ 24.916707] 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 [ 24.917947] RSP: 002b:00007ffcddd5a508 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.918468] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5e97db8d82 [ 24.918953] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5e971f2000 [ 24.919438] RBP: 00007f5e971f2000 R08: 0000000000000009 R09: 0000000000001000 [ 24.919922] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ae8d12cb20 [ 24.920426] R13: 00007ffcddd5a520 R14: 00007ffcddd5a550 R15: 00007ffcddd5a8b0 [ 24.920916] [ 24.921084] [ 24.921205] Allocated by task 212: [ 24.921450] kasan_save_stack+0x22/0x50 [ 24.921737] kasan_set_track+0x25/0x30 [ 24.922022] __kasan_slab_alloc+0x59/0x70 [ 24.922321] kmem_cache_alloc+0x16b/0x370 [ 24.922615] vm_area_dup+0x20/0x160 [ 24.922874] __split_vma+0x170/0x950 [ 24.923145] split_vma+0xc6/0x110 [ 24.923394] mprotect_fixup+0x8d2/0xb30 [ 24.923684] do_mprotect_pkey+0x87e/0xd40 [ 24.923979] __x64_sys_mprotect+0x78/0xc0 [ 24.924273] do_syscall_64+0x3f/0x90 [ 24.924547] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.924914] [ 24.925036] Freed by task 19: [ 24.925255] kasan_save_stack+0x22/0x50 [ 24.925544] kasan_set_track+0x25/0x30 [ 24.925822] kasan_save_free_info+0x2b/0x50 [ 24.926119] __kasan_slab_free+0x10a/0x190 [ 24.926429] kmem_cache_free+0x10d/0x4d0 [ 24.926716] rcu_core+0x8c8/0x2860 [ 24.926968] __do_softirq+0x1b7/0x7d4 [ 24.927235] [ 24.927357] Last potentially related work creation: [ 24.927687] kasan_save_stack+0x22/0x50 [ 24.927970] __kasan_record_aux_stack+0x8e/0xa0 [ 24.928286] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.928664] remove_vma+0x139/0x170 [ 24.928934] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.929246] do_vmi_munmap+0x1f1/0x2b0 [ 24.929521] __vm_munmap+0x138/0x3a0 [ 24.929782] __x64_sys_munmap+0x59/0x80 [ 24.930061] do_syscall_64+0x3f/0x90 [ 24.930326] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.930690] [ 24.930812] The buggy address belongs to the object at ffff888015b949f8 [ 24.930812] which belongs to the cache vm_area_struct of size 168 [ 24.931655] The buggy address is located 88 bytes inside of [ 24.931655] freed 168-byte region [ffff888015b949f8, ffff888015b94aa0) [ 24.932465] [ 24.932587] The buggy address belongs to the physical page: [ 24.932953] page:00000000f3b13479 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15b94 [ 24.933569] memcg:ffff88800f86aa01 [ 24.933812] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 24.934203] page_type: 0xffffffff() [ 24.934474] raw: 0100000000000200 ffff88800879fc80 ffffea0000355000 dead000000000007 [ 24.934985] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f86aa01 [ 24.935506] page dumped because: kasan: bad access detected [ 24.935893] [ 24.936011] Memory state around the buggy address: [ 24.936358] ffff888015b94900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.936844] ffff888015b94980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 24.937328] >ffff888015b94a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.937827] ^ [ 24.938224] ffff888015b94a80: fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 [ 24.938707] ffff888015b94b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.939185] ================================================================== [ 24.939700] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.178998] BUG: Bad rss-counter state mm:00000000e1d1ce2d type:MM_FILEPAGES val:33 [ 26.179567] BUG: Bad rss-counter state mm:00000000e1d1ce2d type:MM_ANONPAGES val:22 [ 26.508986] BUG: Bad rss-counter state mm:00000000189bf3cf type:MM_FILEPAGES val:33 [ 26.509805] BUG: Bad rss-counter state mm:00000000189bf3cf type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:24319' (ECDSA) to the list of known hosts. 2023/06/20 10:11:41 fuzzer started 2023/06/20 10:11:42 dialing manager at localhost:44161 2023/06/20 10:11:42 checking machine... 2023/06/20 10:11:42 checking revisions... [ 26.991042] kmemleak: Automatic memory scanning thread ended 2023/06/20 10:11:42 testing simple program... [ 27.028855] cgroup: Unknown subsys name 'net' [ 27.084155] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:11:40 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=ffffffff85407ee8 RSI=ffffffff85407ed0 RDI=ffff88806ce09a98 RBP=ffff88806ce09b30 RSP=ffff88806ce09a90 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=000000000000ba99 R12=ffff88806ce09b60 R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff88801ab9fec0 RIP=ffffffff81130340 RFL=00000202 [-------] 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=00007ffef82469e8 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=00007f8539ceb510000056273c6cf790 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=ffff88800dc2c5f0 RCX=ffff88800844f780 RDX=ffffea00003a5240 RSI=ffff88800e9494c0 RDI=ffff88800844f780 RBP=0000000000000000 RSP=ffff88800f79fc18 R8 =ffff88800e949390 R9 =0000000000000000 R10=ffffea00003a5240 R11=00000000000d000a R12=dffffc0000000000 R13=ffff88800f79fc58 R14=ffff88800844f780 R15=ffff88800e9494c0 RIP=ffffffff81810196 RFL=00000202 [-------] 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 00007ff9467a4900 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=00007ffec02d0000 CR3=0000000018c3c000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000