syzkaller login: [ 32.513086] BUG: Bad rss-counter state mm:000000006055a7c0 type:MM_FILEPAGES val:33 [ 32.514291] BUG: Bad rss-counter state mm:000000006055a7c0 type:MM_ANONPAGES val:22 [ 32.552683] ================================================================== [ 32.553589] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.554538] Read of size 8 at addr ffff88800d608798 by task sshd/219 [ 32.555314] [ 32.555732] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.556607] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.557601] Call Trace: [ 32.558015] [ 32.558395] dump_stack_lvl+0x91/0xf0 [ 32.559040] print_report+0xcc/0x620 [ 32.559702] ? __virt_addr_valid+0x102/0x340 [ 32.560436] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.561355] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.562147] kasan_report+0xbe/0xf0 [ 32.562730] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.563551] vma_interval_tree_remove+0xc75/0xec0 [ 32.564361] vma_prepare+0xc54/0x11a0 [ 32.564973] __split_vma+0x5af/0x950 [ 32.565565] ? __pfx___split_vma+0x10/0x10 [ 32.566246] ? find_held_lock+0x2c/0x110 [ 32.566919] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.567666] ? lock_is_held_type+0x9f/0x120 [ 32.568389] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.569170] ? mtree_range_walk+0x632/0x900 [ 32.569879] ? mas_walk+0x5c7/0x7c0 [ 32.570463] do_vmi_munmap+0x1f1/0x2b0 [ 32.571086] mmap_region+0x1f9/0x2660 [ 32.571693] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.572333] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.573117] ? __pfx_lock_acquire+0x10/0x10 [ 32.573670] ? __pfx_mmap_region+0x10/0x10 [ 32.574216] ? security_mmap_addr+0x7d/0xa0 [ 32.574755] ? get_unmapped_area+0x1f5/0x3f0 [ 32.575341] do_mmap+0x854/0xf00 [ 32.575805] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.576331] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.576917] ksys_mmap_pgoff+0x3af/0x500 [ 32.577442] do_syscall_64+0x3f/0x90 [ 32.577936] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.578588] RIP: 0033:0x7ff6df3c3d82 [ 32.579082] 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 [ 32.581248] RSP: 002b:00007ffec11430e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.582188] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff6df3c3d82 [ 32.583068] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff6de7fd000 [ 32.583965] RBP: 00007ff6de7fd000 R08: 0000000000000009 R09: 0000000000001000 [ 32.584818] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e84b198f70 [ 32.585690] R13: 00007ffec1143100 R14: 00007ffec1143130 R15: 00007ffec1143490 [ 32.586580] [ 32.586883] [ 32.587122] Allocated by task 212: [ 32.587554] kasan_save_stack+0x22/0x50 [ 32.588107] kasan_set_track+0x25/0x30 [ 32.588607] __kasan_slab_alloc+0x59/0x70 [ 32.589159] kmem_cache_alloc+0x16b/0x370 [ 32.589685] vm_area_dup+0x20/0x160 [ 32.590158] __split_vma+0x170/0x950 [ 32.590631] split_vma+0xc6/0x110 [ 32.591103] mprotect_fixup+0x8d2/0xb30 [ 32.591626] do_mprotect_pkey+0x87e/0xd40 [ 32.592173] __x64_sys_mprotect+0x78/0xc0 [ 32.592701] do_syscall_64+0x3f/0x90 [ 32.593200] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.593846] [ 32.594082] Freed by task 212: [ 32.594481] kasan_save_stack+0x22/0x50 [ 32.595024] kasan_set_track+0x25/0x30 [ 32.595529] kasan_save_free_info+0x2b/0x50 [ 32.596108] __kasan_slab_free+0x10a/0x190 [ 32.596737] kmem_cache_free+0x10d/0x4d0 [ 32.597277] rcu_core+0x8c8/0x2860 [ 32.597766] __do_softirq+0x1b7/0x7d4 [ 32.598403] [ 32.598680] Last potentially related work creation: [ 32.599452] kasan_save_stack+0x22/0x50 [ 32.600158] __kasan_record_aux_stack+0x8e/0xa0 [ 32.600936] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.601792] remove_vma+0x139/0x170 [ 32.602392] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.603128] do_vmi_munmap+0x1f1/0x2b0 [ 32.603793] __vm_munmap+0x138/0x3a0 [ 32.604412] __x64_sys_munmap+0x59/0x80 [ 32.605069] do_syscall_64+0x3f/0x90 [ 32.605703] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.606565] [ 32.606853] Second to last potentially related work creation: [ 32.607789] kasan_save_stack+0x22/0x50 [ 32.608465] __kasan_record_aux_stack+0x8e/0xa0 [ 32.609236] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.610089] remove_vma+0x139/0x170 [ 32.610699] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.611442] do_vmi_munmap+0x1f1/0x2b0 [ 32.612123] move_vma.constprop.0+0x88a/0x1ba0 [ 32.612894] __do_sys_mremap+0xb78/0x1780 [ 32.613589] do_syscall_64+0x3f/0x90 [ 32.614215] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.615075] [ 32.615364] The buggy address belongs to the object at ffff88800d608740 [ 32.615364] which belongs to the cache vm_area_struct of size 168 [ 32.617331] The buggy address is located 88 bytes inside of [ 32.617331] freed 168-byte region [ffff88800d608740, ffff88800d6087e8) [ 32.619207] [ 32.619496] The buggy address belongs to the physical page: [ 32.620409] page:000000007ed5d33b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd608 [ 32.621858] memcg:ffff88800bf36a01 [ 32.622433] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.623302] page_type: 0xffffffff() [ 32.623867] raw: 0100000000000200 ffff88800879fc80 ffffea0000355a40 dead000000000004 [ 32.624785] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800bf36a01 [ 32.625687] page dumped because: kasan: bad access detected [ 32.626348] [ 32.626567] Memory state around the buggy address: [ 32.627144] ffff88800d608680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.628005] ffff88800d608700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 32.628869] >ffff88800d608780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 32.629717] ^ [ 32.630213] ffff88800d608800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 32.631068] ffff88800d608880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 32.631950] ================================================================== [ 32.632952] Disabling lock debugging due to kernel taint [ 35.064222] BUG: Bad rss-counter state mm:0000000069d218c0 type:MM_FILEPAGES val:33 [ 35.065452] BUG: Bad rss-counter state mm:0000000069d218c0 type:MM_ANONPAGES val:22 [ 35.476267] BUG: Bad rss-counter state mm:0000000093c4c977 type:MM_FILEPAGES val:33 [ 35.477310] BUG: Bad rss-counter state mm:0000000093c4c977 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4706' (ECDSA) to the list of known hosts. 2023/06/19 21:31:36 fuzzer started 2023/06/19 21:31:36 dialing manager at localhost:44161 2023/06/19 21:31:36 checking machine... 2023/06/19 21:31:36 checking revisions... [ 36.209188] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:31:36 testing simple program... [ 36.259649] cgroup: Unknown subsys name 'net' [ 36.308278] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:31:35 Registers: info registers vcpu 0 RAX=0000000006d00115 RBX=0000000000000001 RCX=ffff88806c6e4b28 RDX=0000000000000000 RSI=ffffffff846000aa RDI=0000000000000000 RBP=ffff88800844f780 RSP=ffff888016747908 R8 =0000000092e4de6d R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000092cc0 R13=0000000000092cc0 R14=ffff888016747920 R15=0000000000000012 RIP=ffffffff82270e56 RFL=00000286 [--S--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 00007f7815f28900 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=00007f78164df618 CR3=000000000e51e000 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=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=00007f7dcc9d5088 CR3=000000000d47a000 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=0df3340a16c5528cc34a7688efacba6f XMM02=2c67c8bc2e329bc3000000000011e160 XMM03=fb795ef6d65770560000000000124b00 XMM04=b89006588ddcacad00000000000ae988 XMM05=1fa7d993f59cff6d0000000000136658 XMM06=806171799158d9670000000000135388 XMM07=e042d86d42eb936e0000000000124dd8 XMM08=42a8dfa01c660171000000000011e1c0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000