syzkaller login: [ 28.749168] BUG: Bad rss-counter state mm:00000000e3bc9a99 type:MM_FILEPAGES val:33 [ 28.750417] BUG: Bad rss-counter state mm:00000000e3bc9a99 type:MM_ANONPAGES val:22 [ 28.864416] ================================================================== [ 28.865144] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.865869] Read of size 8 at addr ffff88800e4bdd08 by task sshd/219 [ 28.866466] [ 28.866640] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.867305] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.868061] Call Trace: [ 28.868308] [ 28.868656] dump_stack_lvl+0x91/0xf0 [ 28.869030] print_report+0xcc/0x620 [ 28.869377] ? __virt_addr_valid+0x102/0x340 [ 28.869775] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.870222] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.870707] kasan_report+0xbe/0xf0 [ 28.871047] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.871495] vma_interval_tree_remove+0xc75/0xec0 [ 28.871929] vma_prepare+0xc54/0x11a0 [ 28.872276] __split_vma+0x5af/0x950 [ 28.872618] ? __pfx___split_vma+0x10/0x10 [ 28.873013] ? find_held_lock+0x2c/0x110 [ 28.873393] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.873806] ? lock_is_held_type+0x9f/0x120 [ 28.874191] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.874631] ? mtree_range_walk+0x632/0x900 [ 28.875027] ? mas_walk+0x5c7/0x7c0 [ 28.875367] do_vmi_munmap+0x1f1/0x2b0 [ 28.875722] mmap_region+0x1f9/0x2660 [ 28.876062] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.876435] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.876961] ? __pfx_lock_acquire+0x10/0x10 [ 28.877343] ? __pfx_mmap_region+0x10/0x10 [ 28.877725] ? security_mmap_addr+0x7d/0xa0 [ 28.878104] ? get_unmapped_area+0x1f5/0x3f0 [ 28.878498] do_mmap+0x854/0xf00 [ 28.878812] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.879161] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.879572] ksys_mmap_pgoff+0x3af/0x500 [ 28.879930] do_syscall_64+0x3f/0x90 [ 28.880274] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.880752] RIP: 0033:0x7f5489289d82 [ 28.881073] 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 [ 28.882609] RSP: 002b:00007ffc0dbac0b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.883259] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5489289d82 [ 28.883863] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f54886c3000 [ 28.884458] RBP: 00007f54886c3000 R08: 0000000000000009 R09: 0000000000001000 [ 28.885069] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561d8f035ec0 [ 28.885676] R13: 00007ffc0dbac0d0 R14: 00007ffc0dbac100 R15: 00007ffc0dbac460 [ 28.886283] [ 28.886490] [ 28.886641] Allocated by task 211: [ 28.886948] kasan_save_stack+0x22/0x50 [ 28.887308] kasan_set_track+0x25/0x30 [ 28.887659] __kasan_slab_alloc+0x59/0x70 [ 28.888033] kmem_cache_alloc+0x16b/0x370 [ 28.888403] vm_area_dup+0x20/0x160 [ 28.888734] __split_vma+0x170/0x950 [ 28.889066] split_vma+0xc6/0x110 [ 28.889379] mprotect_fixup+0x8d2/0xb30 [ 28.889740] do_mprotect_pkey+0x87e/0xd40 [ 28.890105] __x64_sys_mprotect+0x78/0xc0 [ 28.890476] do_syscall_64+0x3f/0x90 [ 28.890812] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.891268] [ 28.891421] Freed by task 211: [ 28.891703] kasan_save_stack+0x22/0x50 [ 28.892060] kasan_set_track+0x25/0x30 [ 28.892407] kasan_save_free_info+0x2b/0x50 [ 28.892800] __kasan_slab_free+0x10a/0x190 [ 28.893170] kmem_cache_free+0x10d/0x4d0 [ 28.893522] rcu_core+0x8c8/0x2860 [ 28.893834] __do_softirq+0x1b7/0x7d4 [ 28.894171] [ 28.894321] Last potentially related work creation: [ 28.894733] kasan_save_stack+0x22/0x50 [ 28.895085] __kasan_record_aux_stack+0x8e/0xa0 [ 28.895487] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.895943] remove_vma+0x139/0x170 [ 28.896263] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.896659] do_vmi_munmap+0x1f1/0x2b0 [ 28.896999] __vm_munmap+0x138/0x3a0 [ 28.897326] __x64_sys_munmap+0x59/0x80 [ 28.897678] do_syscall_64+0x3f/0x90 [ 28.898009] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.898458] [ 28.898611] Second to last potentially related work creation: [ 28.899095] kasan_save_stack+0x22/0x50 [ 28.899451] __kasan_record_aux_stack+0x8e/0xa0 [ 28.899853] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.900299] remove_vma+0x139/0x170 [ 28.900626] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.901017] do_vmi_munmap+0x1f1/0x2b0 [ 28.901358] mmap_region+0x1f9/0x2660 [ 28.901693] do_mmap+0x854/0xf00 [ 28.901992] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.902332] ksys_mmap_pgoff+0x3af/0x500 [ 28.902687] do_syscall_64+0x3f/0x90 [ 28.903020] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.903472] [ 28.903625] The buggy address belongs to the object at ffff88800e4bdcb0 [ 28.903625] which belongs to the cache vm_area_struct of size 168 [ 28.904666] The buggy address is located 88 bytes inside of [ 28.904666] freed 168-byte region [ffff88800e4bdcb0, ffff88800e4bdd58) [ 28.905667] [ 28.905820] The buggy address belongs to the physical page: [ 28.906287] page:000000005d89951b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe4bd [ 28.907039] memcg:ffff88800eabd801 [ 28.907342] flags: 0x100000000000200(slab|node=0|zone=1) [ 28.907801] page_type: 0xffffffff() [ 28.908117] raw: 0100000000000200 ffff8880087a0c80 ffffea00003c1300 dead000000000004 [ 28.908780] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eabd801 [ 28.909417] page dumped because: kasan: bad access detected [ 28.909880] [ 28.910030] Memory state around the buggy address: [ 28.910430] ffff88800e4bdc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 28.911035] ffff88800e4bdc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 28.911634] >ffff88800e4bdd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 28.912232] ^ [ 28.912547] ffff88800e4bdd80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 28.913147] ffff88800e4bde00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 28.913744] ================================================================== [ 28.914444] Disabling lock debugging due to kernel taint [ 30.223465] BUG: Bad rss-counter state mm:000000005d67bf4d type:MM_FILEPAGES val:33 [ 30.224682] BUG: Bad rss-counter state mm:000000005d67bf4d type:MM_ANONPAGES val:22 [ 30.506902] BUG: Bad rss-counter state mm:00000000838d532c type:MM_FILEPAGES val:33 [ 30.507435] BUG: Bad rss-counter state mm:00000000838d532c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:44930' (ECDSA) to the list of known hosts. 2023/06/20 23:52:26 fuzzer started 2023/06/20 23:52:27 dialing manager at localhost:36067 2023/06/20 23:52:27 checking machine... 2023/06/20 23:52:27 checking revisions... [ 31.064983] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:52:27 testing simple program... [ 31.103090] cgroup: Unknown subsys name 'net' [ 31.156322] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:52:26 Registers: info registers vcpu 0 RAX=ffffffff8180b006 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff11002ca9e5d RSI=ffffffff8180b006 RDI=ffff88801654f358 RBP=ffff88801654f328 RSP=ffff88801654f288 R8 =0000000000000001 R9 =ffff88801654f2d0 R10=0000000000038001 R11=0000000000021eef R12=ffff88801654f358 R13=0000000000000000 R14=ffff88800f851b40 R15=ffff888010371980 RIP=ffffffff813ad470 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 00007f73218d4900 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=00007f7321e8b618 CR3=000000000ec04000 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=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007f27c7527e40 CR3=000000000c784000 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=751f843a154d53b0a140c3211a87d6f3 XMM02=0000000000119e40eff9b2d0a8fce9cb XMM03=0000000000119f102c67c8bc2e329bc3 XMM04=4ded8cd8bfe8433d00000000000ae988 XMM05=19e9129bd510f2350000000000132420 XMM06=2ed82f3d49d0523f0000000000131288 XMM07=e042d86d42eb936e0000000000120e48 XMM08=618683dda86235ec0000000000119f10 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000