syzkaller login: [ 62.579999] BUG: Bad rss-counter state mm:00000000a3070d48 type:MM_FILEPAGES val:33 [ 62.581014] BUG: Bad rss-counter state mm:00000000a3070d48 type:MM_ANONPAGES val:22 [ 62.621535] ================================================================== [ 62.622427] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 62.623485] Read of size 8 at addr ffff888013431968 by task sshd/220 [ 62.624210] [ 62.624418] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 62.625218] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 62.626153] Call Trace: [ 62.626453] [ 62.626724] dump_stack_lvl+0x91/0xf0 [ 62.627189] print_report+0xcc/0x620 [ 62.627642] ? __virt_addr_valid+0x102/0x340 [ 62.628160] ? vma_interval_tree_remove+0xc75/0xec0 [ 62.628736] ? vma_interval_tree_remove+0xc75/0xec0 [ 62.629316] kasan_report+0xbe/0xf0 [ 62.629770] ? vma_interval_tree_remove+0xc75/0xec0 [ 62.630362] vma_interval_tree_remove+0xc75/0xec0 [ 62.630933] vma_prepare+0xc54/0x11a0 [ 62.631389] __split_vma+0x5af/0x950 [ 62.631837] ? __pfx___split_vma+0x10/0x10 [ 62.632354] ? find_held_lock+0x2c/0x110 [ 62.632874] do_vmi_align_munmap+0x2ba/0x11f0 [ 62.633437] ? lock_is_held_type+0x9f/0x120 [ 62.633966] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 62.634597] ? mtree_range_walk+0x632/0x900 [ 62.635147] ? mas_walk+0x5c7/0x7c0 [ 62.635616] do_vmi_munmap+0x1f1/0x2b0 [ 62.636107] mmap_region+0x1f9/0x2660 [ 62.636579] ? vm_mmap_pgoff+0x15c/0x3a0 [ 62.637085] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 62.637793] ? __pfx_lock_acquire+0x10/0x10 [ 62.638339] ? __pfx_mmap_region+0x10/0x10 [ 62.638871] ? security_mmap_addr+0x7d/0xa0 [ 62.639405] ? get_unmapped_area+0x1f5/0x3f0 [ 62.639963] do_mmap+0x854/0xf00 [ 62.640397] vm_mmap_pgoff+0x1a6/0x3a0 [ 62.640891] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 62.641449] ksys_mmap_pgoff+0x3af/0x500 [ 62.641955] do_syscall_64+0x3f/0x90 [ 62.642432] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 62.643083] RIP: 0033:0x7faad0efdd82 [ 62.643538] 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 [ 62.645650] RSP: 002b:00007fff91e0d298 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 62.646577] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007faad0efdd82 [ 62.647426] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007faad0337000 [ 62.648263] RBP: 00007faad0337000 R08: 0000000000000009 R09: 0000000000001000 [ 62.649103] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556adae9aec0 [ 62.649943] R13: 00007fff91e0d2b0 R14: 00007fff91e0d2e0 R15: 00007fff91e0d640 [ 62.650811] [ 62.651103] [ 62.651316] Allocated by task 213: [ 62.651743] kasan_save_stack+0x22/0x50 [ 62.652243] kasan_set_track+0x25/0x30 [ 62.652735] __kasan_slab_alloc+0x59/0x70 [ 62.653260] kmem_cache_alloc+0x16b/0x370 [ 62.653765] vm_area_dup+0x20/0x160 [ 62.654225] __split_vma+0x170/0x950 [ 62.654686] split_vma+0xc6/0x110 [ 62.655119] mprotect_fixup+0x8d2/0xb30 [ 62.655614] do_mprotect_pkey+0x87e/0xd40 [ 62.656128] __x64_sys_mprotect+0x78/0xc0 [ 62.656645] do_syscall_64+0x3f/0x90 [ 62.657117] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 62.657743] [ 62.657957] Freed by task 213: [ 62.658358] kasan_save_stack+0x22/0x50 [ 62.658854] kasan_set_track+0x25/0x30 [ 62.659350] kasan_save_free_info+0x2b/0x50 [ 62.659879] __kasan_slab_free+0x10a/0x190 [ 62.660413] kmem_cache_free+0x10d/0x4d0 [ 62.660911] rcu_core+0x8c8/0x2860 [ 62.661352] __do_softirq+0x1b7/0x7d4 [ 62.661820] [ 62.662034] Last potentially related work creation: [ 62.662693] kasan_save_stack+0x22/0x50 [ 62.663191] __kasan_record_aux_stack+0x8e/0xa0 [ 62.663756] __call_rcu_common.constprop.0+0x6a/0xb90 [ 62.664396] remove_vma+0x139/0x170 [ 62.664852] do_vmi_align_munmap+0xd4a/0x11f0 [ 62.665404] do_vmi_munmap+0x1f1/0x2b0 [ 62.665887] __vm_munmap+0x138/0x3a0 [ 62.666365] __x64_sys_munmap+0x59/0x80 [ 62.666858] do_syscall_64+0x3f/0x90 [ 62.667328] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 62.667968] [ 62.668185] The buggy address belongs to the object at ffff888013431910 [ 62.668185] which belongs to the cache vm_area_struct of size 168 [ 62.669650] The buggy address is located 88 bytes inside of [ 62.669650] freed 168-byte region [ffff888013431910, ffff8880134319b8) [ 62.671072] [ 62.671285] The buggy address belongs to the physical page: [ 62.671945] page:000000009a0a8cf1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x13431 [ 62.673041] memcg:ffff88800ed63101 [ 62.673459] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 62.674173] page_type: 0xffffffff() [ 62.674617] raw: 0100000000000200 ffff88800879fc80 ffffea00003a0240 dead000000000005 [ 62.675530] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ed63101 [ 62.676428] page dumped because: kasan: bad access detected [ 62.677083] [ 62.677298] Memory state around the buggy address: [ 62.677873] ffff888013431800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 62.678726] ffff888013431880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 62.679575] >ffff888013431900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 62.680410] ^ [ 62.681185] ffff888013431980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 62.682043] ffff888013431a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 62.682889] ================================================================== [ 62.683813] Disabling lock debugging due to kernel taint [ 64.836946] BUG: Bad rss-counter state mm:0000000046d3e3bf type:MM_FILEPAGES val:33 [ 64.837919] BUG: Bad rss-counter state mm:0000000046d3e3bf type:MM_ANONPAGES val:22 [ 65.292907] BUG: Bad rss-counter state mm:000000005ecc9b8e type:MM_FILEPAGES val:33 [ 65.294428] BUG: Bad rss-counter state mm:000000005ecc9b8e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:12776' (ECDSA) to the list of known hosts. 2023/06/19 17:34:36 fuzzer started 2023/06/19 17:34:36 dialing manager at localhost:44161 2023/06/19 17:34:36 checking machine... 2023/06/19 17:34:36 checking revisions... [ 66.024334] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:34:36 testing simple program... [ 66.064225] cgroup: Unknown subsys name 'net' [ 66.129522] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:34:34 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000007 RCX=ffffffff8113b199 RDX=ffff888019fa51c0 RSI=0000000000000000 RDI=0000000000000000 RBP=ffff88800d9062b8 RSP=ffff88800f8ffe90 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000002 R11=0000000000000000 R12=0000000000000002 R13=0000000000100073 R14=0000000000000000 R15=0000000000000001 RIP=ffffffff814c0388 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fb1e5b64900 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=00007fb1e66b8044 CR3=000000000cc74000 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=00000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=000000000000000000ff0000000000ff XMM04=365f519e3d3ddd119f1627875b45014a XMM05=000000000000000000ff0000000000ff XMM06=095f511b3d3d3f116800278740450100 XMM07=672065736f6c635f6e6f69737365733a XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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 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=00007f40d654d000 CR3=000000000d5fe000 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=e2f9b4d4012cc098af4918913c3492aa XMM02=ec2efd57dc4c00df000000000011f848 XMM03=f5130e6f5e73248f000000000011f918 XMM04=63993e1485de976700000000000ae988 XMM05=19e9129bd510f2350000000000133af8 XMM06=07407b2b520c063d0000000000132960 XMM07=e042d86d42eb936e00000000001241c8 XMM08=f5130e6f5e73248f000000000011f918 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000