syzkaller login: [ 32.884509] BUG: Bad rss-counter state mm:0000000012bfef9e type:MM_FILEPAGES val:33 [ 32.885698] BUG: Bad rss-counter state mm:0000000012bfef9e type:MM_ANONPAGES val:22 [ 32.926513] ================================================================== [ 32.927471] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.928435] Read of size 8 at addr ffff88800dc47a50 by task sshd/220 [ 32.929358] [ 32.929585] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.930524] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.931577] Call Trace: [ 32.931909] [ 32.932210] dump_stack_lvl+0x91/0xf0 [ 32.932725] print_report+0xcc/0x620 [ 32.933256] ? __virt_addr_valid+0x102/0x340 [ 32.933842] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.934513] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.935156] kasan_report+0xbe/0xf0 [ 32.935666] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.936329] vma_interval_tree_remove+0xc75/0xec0 [ 32.936966] vma_prepare+0xc54/0x11a0 [ 32.937465] __split_vma+0x5af/0x950 [ 32.937958] ? __pfx___split_vma+0x10/0x10 [ 32.938543] ? find_held_lock+0x2c/0x110 [ 32.939088] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.939684] ? lock_is_held_type+0x9f/0x120 [ 32.940255] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.940886] ? mtree_range_walk+0x632/0x900 [ 32.941453] ? mas_walk+0x5c7/0x7c0 [ 32.941950] do_vmi_munmap+0x1f1/0x2b0 [ 32.942487] mmap_region+0x1f9/0x2660 [ 32.943002] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.943534] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.944283] ? __pfx_lock_acquire+0x10/0x10 [ 32.944842] ? __pfx_mmap_region+0x10/0x10 [ 32.945404] ? security_mmap_addr+0x7d/0xa0 [ 32.945965] ? get_unmapped_area+0x1f5/0x3f0 [ 32.946556] do_mmap+0x854/0xf00 [ 32.947112] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.947632] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.948222] ksys_mmap_pgoff+0x3af/0x500 [ 32.948760] do_syscall_64+0x3f/0x90 [ 32.949276] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.949940] RIP: 0033:0x7f88ac0a2d82 [ 32.950440] 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 [ 32.952663] RSP: 002b:00007ffdeadc04c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.953614] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f88ac0a2d82 [ 32.954518] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f88ab4dc000 [ 32.955406] RBP: 00007f88ab4dc000 R08: 0000000000000009 R09: 0000000000001000 [ 32.956305] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562dc2e23f70 [ 32.957204] R13: 00007ffdeadc04e0 R14: 00007ffdeadc0510 R15: 00007ffdeadc0870 [ 32.958131] [ 32.958449] [ 32.958691] Allocated by task 213: [ 32.959170] kasan_save_stack+0x22/0x50 [ 32.959707] kasan_set_track+0x25/0x30 [ 32.960221] __kasan_slab_alloc+0x59/0x70 [ 32.960775] kmem_cache_alloc+0x16b/0x370 [ 32.961315] vm_area_dup+0x20/0x160 [ 32.961790] __split_vma+0x170/0x950 [ 32.962313] split_vma+0xc6/0x110 [ 32.962773] mprotect_fixup+0x8d2/0xb30 [ 32.963296] do_mprotect_pkey+0x87e/0xd40 [ 32.963847] __x64_sys_mprotect+0x78/0xc0 [ 32.964405] do_syscall_64+0x3f/0x90 [ 32.964899] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.965582] [ 32.965809] Freed by task 19: [ 32.966232] kasan_save_stack+0x22/0x50 [ 32.966758] kasan_set_track+0x25/0x30 [ 32.967273] kasan_save_free_info+0x2b/0x50 [ 32.967846] __kasan_slab_free+0x10a/0x190 [ 32.968413] kmem_cache_free+0x10d/0x4d0 [ 32.968951] rcu_core+0x8c8/0x2860 [ 32.969439] __do_softirq+0x1b7/0x7d4 [ 32.969948] [ 32.970185] Last potentially related work creation: [ 32.970815] kasan_save_stack+0x22/0x50 [ 32.971347] __kasan_record_aux_stack+0x8e/0xa0 [ 32.971956] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.972659] remove_vma+0x139/0x170 [ 32.973147] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.973749] do_vmi_munmap+0x1f1/0x2b0 [ 32.974281] __vm_munmap+0x138/0x3a0 [ 32.974778] __x64_sys_munmap+0x59/0x80 [ 32.975305] do_syscall_64+0x3f/0x90 [ 32.975810] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.976474] [ 32.976700] Second to last potentially related work creation: [ 32.977407] kasan_save_stack+0x22/0x50 [ 32.977952] __kasan_record_aux_stack+0x8e/0xa0 [ 32.978596] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.979279] remove_vma+0x139/0x170 [ 32.979750] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.980337] do_vmi_munmap+0x1f1/0x2b0 [ 32.980859] __vm_munmap+0x138/0x3a0 [ 32.981353] __x64_sys_munmap+0x59/0x80 [ 32.981872] do_syscall_64+0x3f/0x90 [ 32.982380] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.983054] [ 32.983281] The buggy address belongs to the object at ffff88800dc479f8 [ 32.983281] which belongs to the cache vm_area_struct of size 168 [ 32.984840] The buggy address is located 88 bytes inside of [ 32.984840] freed 168-byte region [ffff88800dc479f8, ffff88800dc47aa0) [ 32.986355] [ 32.986605] The buggy address belongs to the physical page: [ 32.987323] page:00000000172c0c3f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdc47 [ 32.988474] memcg:ffff88800d607601 [ 32.988917] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 32.989663] page_type: 0xffffffff() [ 32.990162] raw: 0100000000000200 ffff88800879fc80 ffffea00005a8ac0 0000000000000003 [ 32.991140] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d607601 [ 32.992097] page dumped because: kasan: bad access detected [ 32.992792] [ 32.993022] Memory state around the buggy address: [ 32.993637] ffff88800dc47900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.994567] ffff88800dc47980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 32.995481] >ffff88800dc47a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.996384] ^ [ 32.997140] ffff88800dc47a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 32.998044] ffff88800dc47b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.998976] ================================================================== [ 33.000096] Disabling lock debugging due to kernel taint [ 34.969480] BUG: Bad rss-counter state mm:000000005b14fbe4 type:MM_FILEPAGES val:33 [ 34.970544] BUG: Bad rss-counter state mm:000000005b14fbe4 type:MM_ANONPAGES val:22 [ 35.478629] BUG: Bad rss-counter state mm:00000000ff38349a type:MM_FILEPAGES val:33 [ 35.479779] BUG: Bad rss-counter state mm:00000000ff38349a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:55953' (ECDSA) to the list of known hosts. 2023/06/19 15:57:49 fuzzer started 2023/06/19 15:57:49 dialing manager at localhost:44161 2023/06/19 15:57:49 checking machine... 2023/06/19 15:57:49 checking revisions... [ 36.096097] kmemleak: Automatic memory scanning thread ended 2023/06/19 15:57:49 testing simple program... [ 36.148649] cgroup: Unknown subsys name 'net' [ 36.205773] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:57:46 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffffff856528e0 RCX=0000000000000002 RDX=0000000000000000 RSI=0000000000000000 RDI=ffffffff8560b640 RBP=00007fb65d15ab1d RSP=ffff88800cac7930 R8 =0000000000000000 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6cb2 R12=00007fb65d15ab1d R13=0000000000000000 R14=ffff888019b89b40 R15=ffff8880100ad450 RIP=ffffffff812d8e10 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fb65cc04900 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=00007ffd9144e000 CR3=000000000e4aa000 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=0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a XMM01=000000000000000000000000000000ff XMM02=ffffffffffffff00ffff000000000000 XMM03=617265737520646e61202c737265626d XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffff00ffffffffffffffffffffffff XMM08=00000000000000810000363532616873 XMM09=00000000000000000000000000000000 XMM10=00002020202020200020202020202020 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=00007f3d33b23590 CR3=000000000c5ba000 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=7e2b35eabafcde9a8a4269e66f2697b9 XMM02=000000000011c828eff9b2d0a8fce9cb XMM03=000000000011c8f82c67c8bc2e329bc3 XMM04=7ae8e74dabd8191200000000000ae988 XMM05=19e9129bd510f2350000000000134c80 XMM06=47d93705e09a95ad0000000000133ae8 XMM07=e042d86d42eb936e0000000000124388 XMM08=6b0236a6cccf6194000000000011c8f8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000