syzkaller login: [ 28.746092] BUG: Bad rss-counter state mm:00000000ee884738 type:MM_FILEPAGES val:33 [ 28.747750] BUG: Bad rss-counter state mm:00000000ee884738 type:MM_ANONPAGES val:22 [ 28.925609] ================================================================== [ 28.926615] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.927662] Read of size 8 at addr ffff88800fb9b968 by task sshd/219 [ 28.928516] [ 28.928758] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.929885] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.930971] Call Trace: [ 28.931392] [ 28.931714] dump_stack_lvl+0x91/0xf0 [ 28.932262] print_report+0xcc/0x620 [ 28.932796] ? __virt_addr_valid+0x102/0x340 [ 28.933408] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.934092] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.934774] kasan_report+0xbe/0xf0 [ 28.935298] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.935985] vma_interval_tree_remove+0xc75/0xec0 [ 28.936633] vma_prepare+0xc54/0x11a0 [ 28.937144] __split_vma+0x5af/0x950 [ 28.937657] ? __pfx___split_vma+0x10/0x10 [ 28.938224] ? find_held_lock+0x2c/0x110 [ 28.938785] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.939390] ? lock_is_held_type+0x9f/0x120 [ 28.939976] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.940639] ? mtree_range_walk+0x632/0x900 [ 28.941242] ? mas_walk+0x5c7/0x7c0 [ 28.941768] do_vmi_munmap+0x1f1/0x2b0 [ 28.942311] mmap_region+0x1f9/0x2660 [ 28.942840] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.943431] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.944206] ? __pfx_lock_acquire+0x10/0x10 [ 28.944792] ? __pfx_mmap_region+0x10/0x10 [ 28.945360] ? security_mmap_addr+0x7d/0xa0 [ 28.945927] ? get_unmapped_area+0x1f5/0x3f0 [ 28.946516] do_mmap+0x854/0xf00 [ 28.946985] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.947529] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.948139] ksys_mmap_pgoff+0x3af/0x500 [ 28.948693] do_syscall_64+0x3f/0x90 [ 28.949218] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.949930] RIP: 0033:0x7f46300f1d82 [ 28.950422] 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 [ 28.952703] RSP: 002b:00007ffdb2553688 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.953666] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f46300f1d82 [ 28.954578] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f462f52b000 [ 28.955495] RBP: 00007f462f52b000 R08: 0000000000000009 R09: 0000000000001000 [ 28.956393] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560f8fd87ec0 [ 28.957317] R13: 00007ffdb25536a0 R14: 00007ffdb25536d0 R15: 00007ffdb2553a30 [ 28.958236] [ 28.958549] [ 28.958776] Allocated by task 212: [ 28.959234] kasan_save_stack+0x22/0x50 [ 28.959786] kasan_set_track+0x25/0x30 [ 28.960312] __kasan_slab_alloc+0x59/0x70 [ 28.960870] kmem_cache_alloc+0x16b/0x370 [ 28.961423] vm_area_dup+0x20/0x160 [ 28.961908] __split_vma+0x170/0x950 [ 28.962424] split_vma+0xc6/0x110 [ 28.962902] mprotect_fixup+0x8d2/0xb30 [ 28.963481] do_mprotect_pkey+0x87e/0xd40 [ 28.964046] __x64_sys_mprotect+0x78/0xc0 [ 28.964621] do_syscall_64+0x3f/0x90 [ 28.965146] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.965854] [ 28.966083] Freed by task 212: [ 28.966501] kasan_save_stack+0x22/0x50 [ 28.967044] kasan_set_track+0x25/0x30 [ 28.967593] kasan_save_free_info+0x2b/0x50 [ 28.968174] __kasan_slab_free+0x10a/0x190 [ 28.968748] kmem_cache_free+0x10d/0x4d0 [ 28.969293] rcu_core+0x8c8/0x2860 [ 28.969769] __do_softirq+0x1b7/0x7d4 [ 28.970284] [ 28.970629] Last potentially related work creation: [ 28.971256] kasan_save_stack+0x22/0x50 [ 28.971815] __kasan_record_aux_stack+0x8e/0xa0 [ 28.972428] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.973118] remove_vma+0x139/0x170 [ 28.973602] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.974204] do_vmi_munmap+0x1f1/0x2b0 [ 28.974725] __vm_munmap+0x138/0x3a0 [ 28.975226] __x64_sys_munmap+0x59/0x80 [ 28.975773] do_syscall_64+0x3f/0x90 [ 28.976288] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.976974] [ 28.977204] The buggy address belongs to the object at ffff88800fb9b910 [ 28.977204] which belongs to the cache vm_area_struct of size 168 [ 28.978773] The buggy address is located 88 bytes inside of [ 28.978773] freed 168-byte region [ffff88800fb9b910, ffff88800fb9b9b8) [ 28.980294] [ 28.980530] The buggy address belongs to the physical page: [ 28.981247] page:00000000e775a952 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfb9b [ 28.982411] memcg:ffff88800f2dfe01 [ 28.982864] flags: 0x100000000000200(slab|node=0|zone=1) [ 28.983569] page_type: 0xffffffff() [ 28.984047] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 28.985028] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f2dfe01 [ 28.985995] page dumped because: kasan: bad access detected [ 28.986705] [ 28.986939] Memory state around the buggy address: [ 28.987583] ffff88800fb9b800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 28.988505] ffff88800fb9b880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 28.989431] >ffff88800fb9b900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.990348] ^ [ 28.991200] ffff88800fb9b980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 28.992122] ffff88800fb9ba00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.993031] ================================================================== [ 28.994051] Disabling lock debugging due to kernel taint [ 31.730073] BUG: Bad rss-counter state mm:000000001b616f0f type:MM_FILEPAGES val:33 [ 31.731150] BUG: Bad rss-counter state mm:000000001b616f0f type:MM_ANONPAGES val:22 [ 32.218121] BUG: Bad rss-counter state mm:00000000486aa716 type:MM_FILEPAGES val:33 [ 32.219301] BUG: Bad rss-counter state mm:00000000486aa716 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:5554' (ECDSA) to the list of known hosts. 2023/06/20 13:13:24 fuzzer started 2023/06/20 13:13:24 dialing manager at localhost:36067 2023/06/20 13:13:24 checking machine... 2023/06/20 13:13:24 checking revisions... [ 32.849168] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:13:24 testing simple program... [ 32.892497] cgroup: Unknown subsys name 'net' [ 32.939424] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:13:24 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=0000000000000001 RDX=1ffff11002dc1e86 RSI=ffffffff83868346 RDI=ffff888016e0f3f0 RBP=ffff888016e0f448 RSP=ffff888016e0f380 R8 =0000000000000001 R9 =ffff888016e0f430 R10=0000000000038001 R11=0000000000091ae9 R12=ffff888016e0f450 R13=ffff888016e0f438 R14=ffff888016e0f431 R15=ffff888016e0f3f0 RIP=ffffffff811306da RFL=00000212 [----A--] 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 00007f8049cc4900 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=00007f804a27b618 CR3=00000000169f8000 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=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=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007f1120219d40 CR3=0000000006b00000 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=6a67f08bf52d91bde54f8140d5eefdcf XMM02=2c67c8bc2e329bc3000000000011aa00 XMM03=fb795ef6d65770560000000000121750 XMM04=d7aaa27ee4d1589900000000000ae988 XMM05=19e9129bd510f2350000000000131cc8 XMM06=8dad12cd336589d50000000000130b30 XMM07=e042d86d42eb936e0000000000121a28 XMM08=4bf2d07a7626a1ba000000000011aa60 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000