syzkaller login: [ 38.735238] BUG: Bad rss-counter state mm:000000003dafc378 type:MM_FILEPAGES val:33 [ 38.736718] BUG: Bad rss-counter state mm:000000003dafc378 type:MM_ANONPAGES val:22 [ 38.898929] ================================================================== [ 38.899919] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.900918] Read of size 8 at addr ffff88800ef48058 by task sshd/219 [ 38.901737] [ 38.902056] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.902971] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.904017] Call Trace: [ 38.904359] [ 38.904661] dump_stack_lvl+0x91/0xf0 [ 38.905181] print_report+0xcc/0x620 [ 38.905690] ? __virt_addr_valid+0x102/0x340 [ 38.906288] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.906944] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.907594] kasan_report+0xbe/0xf0 [ 38.908098] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.908757] vma_interval_tree_remove+0xc75/0xec0 [ 38.909391] vma_prepare+0xc54/0x11a0 [ 38.909918] __split_vma+0x5af/0x950 [ 38.910431] ? __pfx___split_vma+0x10/0x10 [ 38.910990] ? find_held_lock+0x2c/0x110 [ 38.911542] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.912141] ? lock_is_held_type+0x9f/0x120 [ 38.912712] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.913353] ? mtree_range_walk+0x632/0x900 [ 38.913942] ? mas_walk+0x5c7/0x7c0 [ 38.914443] do_vmi_munmap+0x1f1/0x2b0 [ 38.914958] mmap_region+0x1f9/0x2660 [ 38.915464] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.916007] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.916746] ? __pfx_lock_acquire+0x10/0x10 [ 38.917303] ? __pfx_mmap_region+0x10/0x10 [ 38.917856] ? security_mmap_addr+0x7d/0xa0 [ 38.918428] ? get_unmapped_area+0x1f5/0x3f0 [ 38.919004] do_mmap+0x854/0xf00 [ 38.919469] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.919986] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.920572] ksys_mmap_pgoff+0x3af/0x500 [ 38.921102] do_syscall_64+0x3f/0x90 [ 38.921602] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.922305] RIP: 0033:0x7fd3074d3d82 [ 38.922782] 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 [ 38.925029] RSP: 002b:00007ffcfac89988 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.925988] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd3074d3d82 [ 38.926880] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd30690d000 [ 38.927764] RBP: 00007fd30690d000 R08: 0000000000000009 R09: 0000000000001000 [ 38.928653] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b68f412ec0 [ 38.929535] R13: 00007ffcfac899a0 R14: 00007ffcfac899d0 R15: 00007ffcfac89d30 [ 38.930449] [ 38.930749] [ 38.930971] Allocated by task 212: [ 38.931420] kasan_save_stack+0x22/0x50 [ 38.931943] kasan_set_track+0x25/0x30 [ 38.932459] __kasan_slab_alloc+0x59/0x70 [ 38.933006] kmem_cache_alloc+0x16b/0x370 [ 38.933547] vm_area_dup+0x20/0x160 [ 38.934020] __split_vma+0x170/0x950 [ 38.934464] split_vma+0xc6/0x110 [ 38.934881] mprotect_fixup+0x8d2/0xb30 [ 38.935358] do_mprotect_pkey+0x87e/0xd40 [ 38.935851] __x64_sys_mprotect+0x78/0xc0 [ 38.936347] do_syscall_64+0x3f/0x90 [ 38.936798] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.937400] [ 38.937603] Freed by task 212: [ 38.938130] kasan_save_stack+0x22/0x50 [ 38.938749] kasan_set_track+0x25/0x30 [ 38.939371] kasan_save_free_info+0x2b/0x50 [ 38.940019] __kasan_slab_free+0x10a/0x190 [ 38.940645] kmem_cache_free+0x10d/0x4d0 [ 38.941300] rcu_core+0x8c8/0x2860 [ 38.941849] __do_softirq+0x1b7/0x7d4 [ 38.942461] [ 38.942718] Last potentially related work creation: [ 38.943344] kasan_save_stack+0x22/0x50 [ 38.943865] __kasan_record_aux_stack+0x8e/0xa0 [ 38.944446] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.945127] remove_vma+0x139/0x170 [ 38.945580] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.946166] do_vmi_munmap+0x1f1/0x2b0 [ 38.946651] __vm_munmap+0x138/0x3a0 [ 38.947132] __x64_sys_munmap+0x59/0x80 [ 38.947630] do_syscall_64+0x3f/0x90 [ 38.948147] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.948810] [ 38.949038] The buggy address belongs to the object at ffff88800ef48000 [ 38.949038] which belongs to the cache vm_area_struct of size 168 [ 38.950567] The buggy address is located 88 bytes inside of [ 38.950567] freed 168-byte region [ffff88800ef48000, ffff88800ef480a8) [ 38.952055] [ 38.952281] The buggy address belongs to the physical page: [ 38.952964] page:000000006597de22 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xef48 [ 38.954103] memcg:ffff88800ef09901 [ 38.954533] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.955248] page_type: 0xffffffff() [ 38.955703] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 38.956649] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ef09901 [ 38.957582] page dumped because: kasan: bad access detected [ 38.958273] [ 38.958496] Memory state around the buggy address: [ 38.959102] ffff88800ef47f00: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc [ 38.959986] ffff88800ef47f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 38.960879] >ffff88800ef48000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.961747] ^ [ 38.962515] ffff88800ef48080: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 [ 38.963393] ffff88800ef48100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.964265] ================================================================== [ 38.965598] Disabling lock debugging due to kernel taint [ 40.922549] BUG: Bad rss-counter state mm:00000000479fd5c0 type:MM_FILEPAGES val:33 [ 40.924137] BUG: Bad rss-counter state mm:00000000479fd5c0 type:MM_ANONPAGES val:22 [ 41.397537] BUG: Bad rss-counter state mm:00000000747bded3 type:MM_FILEPAGES val:33 [ 41.398616] BUG: Bad rss-counter state mm:00000000747bded3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:25810' (ECDSA) to the list of known hosts. 2023/06/21 04:36:56 fuzzer started 2023/06/21 04:36:56 dialing manager at localhost:36067 2023/06/21 04:36:56 checking machine... 2023/06/21 04:36:56 checking revisions... [ 42.116914] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:36:56 testing simple program... [ 42.162680] cgroup: Unknown subsys name 'net' [ 42.214671] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:36:56 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007f26a0b86650 CR3=000000000fdbc000 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=2036353a36333a3430203132206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035353a36333a3430203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff81f59cae RBX=0000000000000001 RCX=0000000000000001 RDX=ffff888013e2f801 RSI=ffff888013e2f868 RDI=ffff888013e2f868 RBP=ffff88806cf09af0 RSP=ffff88806cf09a20 R8 =ffffffff861d39f0 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=000000000003aa1f R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff888013e2f870 R15=ffff88806cf09a98 RIP=ffffffff8112fbf3 RFL=00000202 [-------] 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 00007f8d535c2900 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=00007f8d52ae0000 CR3=0000000008edc000 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=ec6e5836e27dcc9a6b4f732d92571f9c XMM02=eff9b2d0a8fce9cb000000000011b2b0 XMM03=2c67c8bc2e329bc3000000000011b3d8 XMM04=d98c0057c4e9e66e00000000000ae988 XMM05=422fb4e09235ba620000000000132d68 XMM06=dfcdbad4f1609c370000000000131890 XMM07=fb795ef6d65770560000000000121d78 XMM08=2c67c8bc2e329bc3000000000011b3d8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000