syzkaller login: [ 32.113778] BUG: Bad rss-counter state mm:00000000aab6dae4 type:MM_FILEPAGES val:33 [ 32.115223] BUG: Bad rss-counter state mm:00000000aab6dae4 type:MM_ANONPAGES val:22 [ 32.296413] ================================================================== [ 32.297316] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.298256] Read of size 8 at addr ffff88800d57fed8 by task sshd/222 [ 32.299206] [ 32.299429] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.300297] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.301280] Call Trace: [ 32.301592] [ 32.301880] dump_stack_lvl+0x91/0xf0 [ 32.302365] print_report+0xcc/0x620 [ 32.302842] ? __virt_addr_valid+0x102/0x340 [ 32.303410] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.304024] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.304632] kasan_report+0xbe/0xf0 [ 32.305106] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.305737] vma_interval_tree_remove+0xc75/0xec0 [ 32.306336] vma_prepare+0xc54/0x11a0 [ 32.306810] __split_vma+0x5af/0x950 [ 32.307288] ? __pfx___split_vma+0x10/0x10 [ 32.307816] ? find_held_lock+0x2c/0x110 [ 32.308333] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.308898] ? lock_is_held_type+0x9f/0x120 [ 32.309429] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.310027] ? mtree_range_walk+0x632/0x900 [ 32.310577] ? mas_walk+0x5c7/0x7c0 [ 32.311047] do_vmi_munmap+0x1f1/0x2b0 [ 32.311548] mmap_region+0x1f9/0x2660 [ 32.312026] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.312540] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.313254] ? __pfx_lock_acquire+0x10/0x10 [ 32.313775] ? __pfx_mmap_region+0x10/0x10 [ 32.314323] ? security_mmap_addr+0x7d/0xa0 [ 32.314846] ? get_unmapped_area+0x1f5/0x3f0 [ 32.315404] do_mmap+0x854/0xf00 [ 32.315849] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.316345] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.316908] ksys_mmap_pgoff+0x3af/0x500 [ 32.317415] do_syscall_64+0x3f/0x90 [ 32.317891] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.318533] RIP: 0033:0x7f3151e4cd82 [ 32.318986] 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 [ 32.321110] RSP: 002b:00007fffd639a7b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.322017] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3151e4cd82 [ 32.322855] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3151286000 [ 32.323718] RBP: 00007f3151286000 R08: 0000000000000009 R09: 0000000000001000 [ 32.324551] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d89c666b20 [ 32.325389] R13: 00007fffd639a7d0 R14: 00007fffd639a800 R15: 00007fffd639ab60 [ 32.326244] [ 32.326538] [ 32.326754] Allocated by task 212: [ 32.327189] kasan_save_stack+0x22/0x50 [ 32.327692] kasan_set_track+0x25/0x30 [ 32.328184] __kasan_slab_alloc+0x59/0x70 [ 32.328712] kmem_cache_alloc+0x16b/0x370 [ 32.329231] vm_area_dup+0x20/0x160 [ 32.329676] __split_vma+0x170/0x950 [ 32.330140] split_vma+0xc6/0x110 [ 32.330579] mprotect_fixup+0x8d2/0xb30 [ 32.331075] do_mprotect_pkey+0x87e/0xd40 [ 32.331597] __x64_sys_mprotect+0x78/0xc0 [ 32.332110] do_syscall_64+0x3f/0x90 [ 32.332585] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.333221] [ 32.333436] Freed by task 13: [ 32.333812] kasan_save_stack+0x22/0x50 [ 32.334312] kasan_set_track+0x25/0x30 [ 32.334803] kasan_save_free_info+0x2b/0x50 [ 32.335350] __kasan_slab_free+0x10a/0x190 [ 32.335881] kmem_cache_free+0x10d/0x4d0 [ 32.336390] rcu_core+0x8c8/0x2860 [ 32.336830] __do_softirq+0x1b7/0x7d4 [ 32.337308] [ 32.337523] Last potentially related work creation: [ 32.338097] kasan_save_stack+0x22/0x50 [ 32.338595] __kasan_record_aux_stack+0x8e/0xa0 [ 32.339161] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.339808] remove_vma+0x139/0x170 [ 32.340260] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.340815] do_vmi_munmap+0x1f1/0x2b0 [ 32.341305] __vm_munmap+0x138/0x3a0 [ 32.341779] __x64_sys_munmap+0x59/0x80 [ 32.342287] do_syscall_64+0x3f/0x90 [ 32.342762] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.343429] [ 32.343643] Second to last potentially related work creation: [ 32.344319] kasan_save_stack+0x22/0x50 [ 32.344822] __kasan_record_aux_stack+0x8e/0xa0 [ 32.345398] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.346038] remove_vma+0x139/0x170 [ 32.346498] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.347062] do_vmi_munmap+0x1f1/0x2b0 [ 32.347556] mmap_region+0x1f9/0x2660 [ 32.348030] do_mmap+0x854/0xf00 [ 32.348458] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.348948] ksys_mmap_pgoff+0x3af/0x500 [ 32.349457] do_syscall_64+0x3f/0x90 [ 32.349937] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.350581] [ 32.350794] The buggy address belongs to the object at ffff88800d57fe80 [ 32.350794] which belongs to the cache vm_area_struct of size 168 [ 32.352272] The buggy address is located 88 bytes inside of [ 32.352272] freed 168-byte region [ffff88800d57fe80, ffff88800d57ff28) [ 32.353671] [ 32.353887] The buggy address belongs to the physical page: [ 32.354545] page:00000000d4ee68f6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd57f [ 32.355647] memcg:ffff88800c71ed01 [ 32.356073] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.356736] page_type: 0xffffffff() [ 32.357189] raw: 0100000000000200 ffff88800879fc80 ffffea00003575c0 dead000000000002 [ 32.358145] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c71ed01 [ 32.359088] page dumped because: kasan: bad access detected [ 32.359768] [ 32.359991] Memory state around the buggy address: [ 32.360582] ffff88800d57fd80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.361463] ffff88800d57fe00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 32.362327] >ffff88800d57fe80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.363206] ^ [ 32.363940] ffff88800d57ff00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 32.364809] ffff88800d57ff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 32.365674] ================================================================== [ 32.366672] Disabling lock debugging due to kernel taint [ 35.204869] BUG: Bad rss-counter state mm:000000003ed2a8d7 type:MM_FILEPAGES val:33 [ 35.205962] BUG: Bad rss-counter state mm:000000003ed2a8d7 type:MM_ANONPAGES val:22 [ 35.615408] BUG: Bad rss-counter state mm:000000008b47d369 type:MM_FILEPAGES val:33 [ 35.616475] BUG: Bad rss-counter state mm:000000008b47d369 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:36458' (ECDSA) to the list of known hosts. 2023/06/19 16:19:14 fuzzer started 2023/06/19 16:19:15 dialing manager at localhost:44161 2023/06/19 16:19:15 checking machine... 2023/06/19 16:19:15 checking revisions... [ 36.343129] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:19:15 testing simple program... [ 36.393294] cgroup: Unknown subsys name 'net' [ 36.431363] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:19:11 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff856528e0 RCX=0000000000000002 RDX=0000000000000000 RSI=0000000000000000 RDI=ffffffff8560b640 RBP=00007fbf53bb1f18 RSP=ffff888009c97718 R8 =0000000000000000 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=00007fbf53bb1f18 R13=0000000000000000 R14=ffff888016603680 R15=ffff88800c69c260 RIP=ffffffff812d8e20 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 00007fbf536ca900 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=00007fbf53c820b0 CR3=000000000e9c6000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 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=00007f96c29abee0 CR3=000000000d81c000 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=8c696d62bb2903874b4afbc62faeed18 XMM02=000000000011f6e0eff9b2d0a8fce9cb XMM03=000000000011f7b02c67c8bc2e329bc3 XMM04=954f38e77adf033400000000000ae988 XMM05=e4cb8bb95a7664b60000000000134d40 XMM06=d6ebbc501c1c3bb40000000000133ba8 XMM07=e042d86d42eb936e0000000000123948 XMM08=50370b83d595f2b5000000000011f7b0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000