syzkaller login: [ 38.884970] BUG: Bad rss-counter state mm:00000000bfd4e83a type:MM_FILEPAGES val:33 [ 38.886214] BUG: Bad rss-counter state mm:00000000bfd4e83a type:MM_ANONPAGES val:22 [ 38.925052] ================================================================== [ 38.926172] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.927301] Read of size 8 at addr ffff8880183115c8 by task sshd/219 [ 38.928125] [ 38.928377] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.929427] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.930601] Call Trace: [ 38.930953] [ 38.931314] dump_stack_lvl+0x91/0xf0 [ 38.931947] print_report+0xcc/0x620 [ 38.932549] ? __virt_addr_valid+0x102/0x340 [ 38.933118] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.933836] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.934538] kasan_report+0xbe/0xf0 [ 38.935012] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.935661] vma_interval_tree_remove+0xc75/0xec0 [ 38.936404] vma_prepare+0xc54/0x11a0 [ 38.936930] __split_vma+0x5af/0x950 [ 38.937433] ? __pfx___split_vma+0x10/0x10 [ 38.938096] ? find_held_lock+0x2c/0x110 [ 38.938754] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.939350] ? lock_is_held_type+0x9f/0x120 [ 38.940089] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.940812] ? mtree_range_walk+0x632/0x900 [ 38.941508] ? mas_walk+0x5c7/0x7c0 [ 38.942045] do_vmi_munmap+0x1f1/0x2b0 [ 38.942581] mmap_region+0x1f9/0x2660 [ 38.943065] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.943595] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.944332] ? __pfx_lock_acquire+0x10/0x10 [ 38.944882] ? __pfx_mmap_region+0x10/0x10 [ 38.945444] ? security_mmap_addr+0x7d/0xa0 [ 38.945980] ? get_unmapped_area+0x1f5/0x3f0 [ 38.946556] do_mmap+0x854/0xf00 [ 38.946997] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.947515] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.948101] ksys_mmap_pgoff+0x3af/0x500 [ 38.948625] do_syscall_64+0x3f/0x90 [ 38.949103] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.949763] RIP: 0033:0x7fc3f9fead82 [ 38.950221] 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 [ 38.952422] RSP: 002b:00007ffdd4da6ce8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.953343] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc3f9fead82 [ 38.954195] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc3f9424000 [ 38.955055] RBP: 00007fc3f9424000 R08: 0000000000000009 R09: 0000000000001000 [ 38.955953] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bd2c601ec0 [ 38.956812] R13: 00007ffdd4da6d00 R14: 00007ffdd4da6d30 R15: 00007ffdd4da7090 [ 38.957685] [ 38.957981] [ 38.958194] Allocated by task 212: [ 38.958648] kasan_save_stack+0x22/0x50 [ 38.959161] kasan_set_track+0x25/0x30 [ 38.959689] __kasan_slab_alloc+0x59/0x70 [ 38.960242] kmem_cache_alloc+0x16b/0x370 [ 38.960778] vm_area_dup+0x20/0x160 [ 38.961233] __split_vma+0x170/0x950 [ 38.961712] split_vma+0xc6/0x110 [ 38.962152] mprotect_fixup+0x8d2/0xb30 [ 38.962668] do_mprotect_pkey+0x87e/0xd40 [ 38.963186] __x64_sys_mprotect+0x78/0xc0 [ 38.963740] do_syscall_64+0x3f/0x90 [ 38.964232] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.964897] [ 38.965117] Freed by task 212: [ 38.965526] kasan_save_stack+0x22/0x50 [ 38.966029] kasan_set_track+0x25/0x30 [ 38.966545] kasan_save_free_info+0x2b/0x50 [ 38.967087] __kasan_slab_free+0x10a/0x190 [ 38.967650] kmem_cache_free+0x10d/0x4d0 [ 38.968174] rcu_core+0x8c8/0x2860 [ 38.968636] __do_softirq+0x1b7/0x7d4 [ 38.969121] [ 38.969353] Last potentially related work creation: [ 38.970036] kasan_save_stack+0x22/0x50 [ 38.970557] __kasan_record_aux_stack+0x8e/0xa0 [ 38.971135] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.971796] remove_vma+0x139/0x170 [ 38.972262] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.972828] do_vmi_munmap+0x1f1/0x2b0 [ 38.973312] __vm_munmap+0x138/0x3a0 [ 38.973792] __x64_sys_munmap+0x59/0x80 [ 38.974289] do_syscall_64+0x3f/0x90 [ 38.974790] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.975464] [ 38.975686] The buggy address belongs to the object at ffff888018311570 [ 38.975686] which belongs to the cache vm_area_struct of size 168 [ 38.977194] The buggy address is located 88 bytes inside of [ 38.977194] freed 168-byte region [ffff888018311570, ffff888018311618) [ 38.978610] [ 38.978829] The buggy address belongs to the physical page: [ 38.979514] page:000000004925fc80 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18311 [ 38.980638] memcg:ffff88800dddc001 [ 38.981064] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.981725] page_type: 0xffffffff() [ 38.982176] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 38.983116] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dddc001 [ 38.984051] page dumped because: kasan: bad access detected [ 38.984722] [ 38.984941] Memory state around the buggy address: [ 38.985534] ffff888018311480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.986400] ffff888018311500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 38.987250] >ffff888018311580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.988131] ^ [ 38.988823] ffff888018311600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 38.989696] ffff888018311680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.990561] ================================================================== [ 38.991530] Disabling lock debugging due to kernel taint [ 41.064371] BUG: Bad rss-counter state mm:000000002b281c28 type:MM_FILEPAGES val:33 [ 41.065391] BUG: Bad rss-counter state mm:000000002b281c28 type:MM_ANONPAGES val:22 [ 41.546314] BUG: Bad rss-counter state mm:00000000f2dcc7a1 type:MM_FILEPAGES val:33 [ 41.547973] BUG: Bad rss-counter state mm:00000000f2dcc7a1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:41899' (ECDSA) to the list of known hosts. 2023/06/21 05:18:26 fuzzer started 2023/06/21 05:18:27 dialing manager at localhost:36067 2023/06/21 05:18:27 checking machine... 2023/06/21 05:18:27 checking revisions... [ 42.320387] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:18:27 testing simple program... [ 42.367601] cgroup: Unknown subsys name 'net' [ 42.408237] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:18:26 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888008f7a000 RCX=0000000000000000 RDX=1ffff110032783e2 RSI=ffffffff818df40e RDI=ffff8880193c1f10 RBP=ffff8880193c1d80 RSP=ffff88800f47fca8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000001 R11=00000000000b6a61 R12=0000000000000001 R13=0000000000000000 R14=ffff8880193c1e08 R15=ffff8880193c1e58 RIP=ffffffff818df438 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 00007f59301dc900 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=00007ffcf5163498 CR3=000000000e418000 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=ff0000000000ffff0000000000ff0000 XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000e9aa53bc09a3 RBX=9de0cd4374a31584 RCX=000000000000acf8 RDX=00000000000ae988 RSI=0000000000000000 RDI=000055d4dc88e400 RBP=0000000000000029 RSP=00007fff10a58c10 R8 =00007fff10a58cc0 R9 =00007fff10a58cc8 R10=00007fb9d43eba00 R11=0000000000006236 R12=00007fff10a59d4e R13=9de0cd4374a31584 R14=000055d4dc88e400 R15=00007fff10a58cc0 RIP=00007fb9d437a176 RFL=00000202 [-------] 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 00007fb9d37f6900 00000000 00000000 GS =0000 0000000000000000 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=00007fb9d2c3c6b0 CR3=000000000d680000 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=3d3d3d3d3d3d3d3d3d3d3d3d3d3d3d3d XMM01=00000000000000000000000000000000 XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=9de0cd4374a3158400000000000ae988 XMM05=b28f170a73c50de10000000000133328 XMM06=c291bd5c70af25b900000000001323c8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000