syzkaller login: [ 31.289522] BUG: Bad rss-counter state mm:00000000429e12bf type:MM_FILEPAGES val:33 [ 31.291179] BUG: Bad rss-counter state mm:00000000429e12bf type:MM_ANONPAGES val:22 [ 31.454798] ================================================================== [ 31.455939] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.457115] Read of size 8 at addr ffff88800de20df0 by task sshd/219 [ 31.458273] [ 31.458504] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.459369] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.460367] Call Trace: [ 31.460694] [ 31.460978] dump_stack_lvl+0x91/0xf0 [ 31.461476] print_report+0xcc/0x620 [ 31.461973] ? __virt_addr_valid+0x102/0x340 [ 31.462550] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.463168] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.463784] kasan_report+0xbe/0xf0 [ 31.464263] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.464892] vma_interval_tree_remove+0xc75/0xec0 [ 31.465503] vma_prepare+0xc54/0x11a0 [ 31.465983] __split_vma+0x5af/0x950 [ 31.466471] ? __pfx___split_vma+0x10/0x10 [ 31.467006] ? find_held_lock+0x2c/0x110 [ 31.467528] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.468104] ? lock_is_held_type+0x9f/0x120 [ 31.468645] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.469256] ? mtree_range_walk+0x632/0x900 [ 31.469813] ? mas_walk+0x5c7/0x7c0 [ 31.470305] do_vmi_munmap+0x1f1/0x2b0 [ 31.470800] mmap_region+0x1f9/0x2660 [ 31.471291] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.471813] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.472539] ? __pfx_lock_acquire+0x10/0x10 [ 31.473077] ? __pfx_mmap_region+0x10/0x10 [ 31.473609] ? security_mmap_addr+0x7d/0xa0 [ 31.474153] ? get_unmapped_area+0x1f5/0x3f0 [ 31.474714] do_mmap+0x854/0xf00 [ 31.475167] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.475667] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.476237] ksys_mmap_pgoff+0x3af/0x500 [ 31.476753] do_syscall_64+0x3f/0x90 [ 31.477265] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.477930] RIP: 0033:0x7f326b5d8d82 [ 31.478416] 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 [ 31.480552] RSP: 002b:00007ffdb3ed4d38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.481463] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f326b5d8d82 [ 31.482330] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f326aa12000 [ 31.483184] RBP: 00007f326aa12000 R08: 0000000000000009 R09: 0000000000001000 [ 31.484039] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562d6b6c9ec0 [ 31.484888] R13: 00007ffdb3ed4d50 R14: 00007ffdb3ed4d80 R15: 00007ffdb3ed50e0 [ 31.485753] [ 31.486050] [ 31.486273] Allocated by task 212: [ 31.486713] kasan_save_stack+0x22/0x50 [ 31.487223] kasan_set_track+0x25/0x30 [ 31.487722] __kasan_slab_alloc+0x59/0x70 [ 31.488266] kmem_cache_alloc+0x16b/0x370 [ 31.488789] vm_area_dup+0x20/0x160 [ 31.489247] __split_vma+0x170/0x950 [ 31.489726] split_vma+0xc6/0x110 [ 31.490190] mprotect_fixup+0x8d2/0xb30 [ 31.490700] do_mprotect_pkey+0x87e/0xd40 [ 31.491229] __x64_sys_mprotect+0x78/0xc0 [ 31.491760] do_syscall_64+0x3f/0x90 [ 31.492237] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.492882] [ 31.493105] Freed by task 212: [ 31.493507] kasan_save_stack+0x22/0x50 [ 31.494017] kasan_set_track+0x25/0x30 [ 31.494524] kasan_save_free_info+0x2b/0x50 [ 31.495058] __kasan_slab_free+0x10a/0x190 [ 31.495604] kmem_cache_free+0x10d/0x4d0 [ 31.496114] rcu_core+0x8c8/0x2860 [ 31.496572] __do_softirq+0x1b7/0x7d4 [ 31.497054] [ 31.497278] Last potentially related work creation: [ 31.497862] kasan_save_stack+0x22/0x50 [ 31.498392] __kasan_record_aux_stack+0x8e/0xa0 [ 31.499058] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.499712] remove_vma+0x139/0x170 [ 31.500165] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.500731] do_vmi_munmap+0x1f1/0x2b0 [ 31.501233] __vm_munmap+0x138/0x3a0 [ 31.501714] __x64_sys_munmap+0x59/0x80 [ 31.502223] do_syscall_64+0x3f/0x90 [ 31.502712] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.503367] [ 31.503581] Second to last potentially related work creation: [ 31.504275] kasan_save_stack+0x22/0x50 [ 31.504784] __kasan_record_aux_stack+0x8e/0xa0 [ 31.505371] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.506015] remove_vma+0x139/0x170 [ 31.506506] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.507074] do_vmi_munmap+0x1f1/0x2b0 [ 31.507568] mmap_region+0x1f9/0x2660 [ 31.508052] do_mmap+0x854/0xf00 [ 31.508490] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.508993] ksys_mmap_pgoff+0x3af/0x500 [ 31.509501] do_syscall_64+0x3f/0x90 [ 31.509984] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.510661] [ 31.510876] The buggy address belongs to the object at ffff88800de20d98 [ 31.510876] which belongs to the cache vm_area_struct of size 168 [ 31.512373] The buggy address is located 88 bytes inside of [ 31.512373] freed 168-byte region [ffff88800de20d98, ffff88800de20e40) [ 31.513800] [ 31.514023] The buggy address belongs to the physical page: [ 31.514719] page:00000000969a5781 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xde20 [ 31.515804] memcg:ffff88800bb64f01 [ 31.516239] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.516895] page_type: 0xffffffff() [ 31.517360] raw: 0100000000000200 ffff88800879fc80 ffffea0000365a00 dead000000000008 [ 31.518307] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800bb64f01 [ 31.519232] page dumped because: kasan: bad access detected [ 31.519908] [ 31.520126] Memory state around the buggy address: [ 31.520714] ffff88800de20c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.521587] ffff88800de20d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.522463] >ffff88800de20d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.523318] ^ [ 31.524137] ffff88800de20e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.525001] ffff88800de20e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.525861] ================================================================== [ 31.526891] Disabling lock debugging due to kernel taint [ 33.559680] BUG: Bad rss-counter state mm:00000000f23707a5 type:MM_FILEPAGES val:33 [ 33.560987] BUG: Bad rss-counter state mm:00000000f23707a5 type:MM_ANONPAGES val:22 [ 34.030321] BUG: Bad rss-counter state mm:00000000ea016b20 type:MM_FILEPAGES val:33 [ 34.031322] BUG: Bad rss-counter state mm:00000000ea016b20 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:65263' (ECDSA) to the list of known hosts. 2023/06/19 14:06:53 fuzzer started 2023/06/19 14:06:54 dialing manager at localhost:44161 2023/06/19 14:06:54 checking machine... 2023/06/19 14:06:54 checking revisions... [ 34.700742] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:06:54 testing simple program... [ 34.758937] cgroup: Unknown subsys name 'net' [ 34.796889] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:06:52 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88801669fd90 RCX=ffffffff81370c61 RDX=1ffff1100d9c6a00 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=0000000000000200 RSP=ffff88806ce09de0 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffff88806ce35000 R13=ffff88806ce3a3a8 R14=ffff88806ce3a2c0 R15=0000000000000000 RIP=ffffffff8137111b RFL=00000016 [----AP-] 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 00007f52d97bb900 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=00007f52d9d72618 CR3=0000000019fa2000 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=563412feff00545000000000000080fe 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 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=ffff888008c58400 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=00007fe97e4b48b0 CR3=0000000013e4c000 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=4ae9bed45e662d9801493e568959d64d XMM02=000000000011cc68ec2efd57dc4c00df XMM03=00000000001242089e00702eb3fd0d7b XMM04=348ff9259cf24dfc00000000000ae988 XMM05=dfcdbad4f1609c3700000000001353d0 XMM06=035a8eaff22fa1d50000000000134238 XMM07=e042d86d42eb936e0000000000124488 XMM08=9e00702eb3fd0d7b000000000011ccc8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000