syzkaller login: [ 38.747173] sshd (212) used greatest stack depth: 23992 bytes left [ 38.749101] BUG: Bad rss-counter state mm:00000000c60dd5c4 type:MM_FILEPAGES val:33 [ 38.751221] BUG: Bad rss-counter state mm:00000000c60dd5c4 type:MM_ANONPAGES val:22 [ 38.928085] ================================================================== [ 38.929092] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.930095] Read of size 8 at addr ffff8880141af880 by task sshd/219 [ 38.931004] [ 38.931237] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.932174] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.933235] Call Trace: [ 38.933576] [ 38.933895] dump_stack_lvl+0x91/0xf0 [ 38.934418] print_report+0xcc/0x620 [ 38.934947] ? __virt_addr_valid+0x102/0x340 [ 38.935536] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.936206] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.936921] kasan_report+0xbe/0xf0 [ 38.937427] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.938097] vma_interval_tree_remove+0xc75/0xec0 [ 38.938752] vma_prepare+0xc54/0x11a0 [ 38.939263] __split_vma+0x5af/0x950 [ 38.939789] ? __pfx___split_vma+0x10/0x10 [ 38.940363] ? find_held_lock+0x2c/0x110 [ 38.940929] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.941533] ? lock_is_held_type+0x9f/0x120 [ 38.942137] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.942803] ? mtree_range_walk+0x632/0x900 [ 38.943390] ? mas_walk+0x5c7/0x7c0 [ 38.943915] do_vmi_munmap+0x1f1/0x2b0 [ 38.944453] mmap_region+0x1f9/0x2660 [ 38.944982] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.945523] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.946300] ? __pfx_lock_acquire+0x10/0x10 [ 38.946899] ? __pfx_mmap_region+0x10/0x10 [ 38.947463] ? security_mmap_addr+0x7d/0xa0 [ 38.948059] ? get_unmapped_area+0x1f5/0x3f0 [ 38.948679] do_mmap+0x854/0xf00 [ 38.949158] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.949704] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.950309] ksys_mmap_pgoff+0x3af/0x500 [ 38.950872] do_syscall_64+0x3f/0x90 [ 38.951379] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.952094] RIP: 0033:0x7f6021b52d82 [ 38.952684] 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 [ 38.955634] RSP: 002b:00007ffdefc8a5e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.956930] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6021b52d82 [ 38.958073] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6020f8c000 [ 38.959084] RBP: 00007f6020f8c000 R08: 0000000000000009 R09: 0000000000001000 [ 38.960003] R10: 0000000000000812 R11: 0000000000000206 R12: 000056281d22af70 [ 38.960959] R13: 00007ffdefc8a600 R14: 00007ffdefc8a630 R15: 00007ffdefc8a990 [ 38.961960] [ 38.962333] [ 38.962566] Allocated by task 212: [ 38.963039] kasan_save_stack+0x22/0x50 [ 38.963585] kasan_set_track+0x25/0x30 [ 38.964118] __kasan_slab_alloc+0x59/0x70 [ 38.964715] kmem_cache_alloc+0x16b/0x370 [ 38.965262] vm_area_dup+0x20/0x160 [ 38.965779] __split_vma+0x170/0x950 [ 38.966279] split_vma+0xc6/0x110 [ 38.966764] mprotect_fixup+0x8d2/0xb30 [ 38.967300] do_mprotect_pkey+0x87e/0xd40 [ 38.967871] __x64_sys_mprotect+0x78/0xc0 [ 38.968450] do_syscall_64+0x3f/0x90 [ 38.968977] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.969669] [ 38.969904] Freed by task 212: [ 38.970321] kasan_save_stack+0x22/0x50 [ 38.970889] kasan_set_track+0x25/0x30 [ 38.971413] kasan_save_free_info+0x2b/0x50 [ 38.972001] __kasan_slab_free+0x10a/0x190 [ 38.972594] kmem_cache_free+0x10d/0x4d0 [ 38.973144] rcu_core+0x8c8/0x2860 [ 38.973624] __do_softirq+0x1b7/0x7d4 [ 38.974159] [ 38.974392] Last potentially related work creation: [ 38.975041] kasan_save_stack+0x22/0x50 [ 38.975578] __kasan_record_aux_stack+0x8e/0xa0 [ 38.976213] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.976940] remove_vma+0x139/0x170 [ 38.977420] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.978030] do_vmi_munmap+0x1f1/0x2b0 [ 38.978548] __vm_munmap+0x138/0x3a0 [ 38.979082] __x64_sys_munmap+0x59/0x80 [ 38.979614] do_syscall_64+0x3f/0x90 [ 38.980149] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.980877] [ 38.981109] The buggy address belongs to the object at ffff8880141af828 [ 38.981109] which belongs to the cache vm_area_struct of size 168 [ 38.982684] The buggy address is located 88 bytes inside of [ 38.982684] freed 168-byte region [ffff8880141af828, ffff8880141af8d0) [ 38.984205] [ 38.984456] The buggy address belongs to the physical page: [ 38.985159] page:000000002f22cd7e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x141af [ 38.986329] memcg:ffff888016a77801 [ 38.986808] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.987550] page_type: 0xffffffff() [ 38.988040] raw: 0100000000000200 ffff8880087a0c80 ffffea0000398e00 0000000000000007 [ 38.989072] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016a77801 [ 38.990050] page dumped because: kasan: bad access detected [ 38.990767] [ 38.990996] Memory state around the buggy address: [ 38.991611] ffff8880141af780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 38.992549] ffff8880141af800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 38.993489] >ffff8880141af880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 38.994429] ^ [ 38.994882] ffff8880141af900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.995810] ffff8880141af980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc 00 [ 38.996754] ================================================================== [ 38.997879] Disabling lock debugging due to kernel taint [ 41.116342] BUG: Bad rss-counter state mm:00000000e95a84c1 type:MM_FILEPAGES val:33 [ 41.117521] BUG: Bad rss-counter state mm:00000000e95a84c1 type:MM_ANONPAGES val:22 [ 41.644387] BUG: Bad rss-counter state mm:000000002b4a31c4 type:MM_FILEPAGES val:33 [ 41.645536] BUG: Bad rss-counter state mm:000000002b4a31c4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:30682' (ECDSA) to the list of known hosts. 2023/06/21 06:17:57 fuzzer started 2023/06/21 06:17:57 dialing manager at localhost:36067 2023/06/21 06:17:57 checking machine... 2023/06/21 06:17:57 checking revisions... [ 42.324069] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:17:58 testing simple program... [ 42.354751] cgroup: Unknown subsys name 'net' [ 42.403836] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:17:57 Registers: info registers vcpu 0 RAX=ffffffff81629fa0 RBX=0000000000000000 RCX=ffffffff8162a098 RDX=ffff88800ff30000 RSI=0000000000000000 RDI=0000000000000005 RBP=0000000000000000 RSP=ffff88800f1bf8f0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000000 R13=ffff88800f1bfdc8 R14=0000000000000000 R15=dffffc0000000000 RIP=ffffffff814c0864 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 00007fc2f6ad0900 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=00007fc2f70880b0 CR3=0000000015a2c000 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=2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c XMM01=00000000000000000000000000ff0000 XMM02=00000000000000000000000000ff0000 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=6c6f636f746f72702f6374652f006563 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff8180ca5a RBX=ffffffff813ad470 RCX=ffffffff86139701 RDX=1ffff1100d9e135a RSI=ffffffff8180ca5a RDI=ffff88806cf09b40 RBP=ffff88806cf09b10 RSP=ffff88806cf09a70 R8 =ffffffff86139748 R9 =ffff88806cf09ab8 R10=0000000000038001 R11=0000000000020f03 R12=ffff88806cf09b40 R13=0000000000000000 R14=ffff888008d951c0 R15=ffff88800dcb3100 RIP=ffffffff84538440 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 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=00007f1f22d72f60 CR3=0000000019f5a000 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=2037353a37313a3630203132206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036353a37313a3630203132 XMM08=20303d64696720303d64697520612f6e XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000