syzkaller login: [ 36.287083] BUG: Bad rss-counter state mm:000000009aadba92 type:MM_FILEPAGES val:33 [ 36.288571] BUG: Bad rss-counter state mm:000000009aadba92 type:MM_ANONPAGES val:22 [ 36.449424] ================================================================== [ 36.450488] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.451598] Read of size 8 at addr ffff88800f386a50 by task sshd/220 [ 36.452634] [ 36.452878] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.453753] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.454733] Call Trace: [ 36.455060] [ 36.455345] dump_stack_lvl+0x91/0xf0 [ 36.455840] print_report+0xcc/0x620 [ 36.456335] ? __virt_addr_valid+0x102/0x340 [ 36.456893] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.457513] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.458131] kasan_report+0xbe/0xf0 [ 36.458606] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.459233] vma_interval_tree_remove+0xc75/0xec0 [ 36.459842] vma_prepare+0xc54/0x11a0 [ 36.460344] __split_vma+0x5af/0x950 [ 36.460825] ? __pfx___split_vma+0x10/0x10 [ 36.461364] ? find_held_lock+0x2c/0x110 [ 36.461894] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.462455] ? lock_is_held_type+0x9f/0x120 [ 36.463005] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.463606] ? mtree_range_walk+0x632/0x900 [ 36.464173] ? mas_walk+0x5c7/0x7c0 [ 36.464654] do_vmi_munmap+0x1f1/0x2b0 [ 36.465150] mmap_region+0x1f9/0x2660 [ 36.465631] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.466153] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.466860] ? __pfx_lock_acquire+0x10/0x10 [ 36.467393] ? __pfx_mmap_region+0x10/0x10 [ 36.467932] ? security_mmap_addr+0x7d/0xa0 [ 36.468481] ? get_unmapped_area+0x1f5/0x3f0 [ 36.469031] do_mmap+0x854/0xf00 [ 36.469474] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.469980] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.470543] ksys_mmap_pgoff+0x3af/0x500 [ 36.471053] do_syscall_64+0x3f/0x90 [ 36.471525] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.472200] RIP: 0033:0x7f091071fd82 [ 36.472658] 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 [ 36.474801] RSP: 002b:00007fffec8cb5d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.475718] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f091071fd82 [ 36.476586] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f090fb59000 [ 36.477437] RBP: 00007f090fb59000 R08: 0000000000000009 R09: 0000000000001000 [ 36.478286] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f3f3eadec0 [ 36.479137] R13: 00007fffec8cb5f0 R14: 00007fffec8cb620 R15: 00007fffec8cb980 [ 36.480020] [ 36.480316] [ 36.480536] Allocated by task 213: [ 36.480969] kasan_save_stack+0x22/0x50 [ 36.481472] kasan_set_track+0x25/0x30 [ 36.481963] __kasan_slab_alloc+0x59/0x70 [ 36.482488] kmem_cache_alloc+0x16b/0x370 [ 36.483006] vm_area_dup+0x20/0x160 [ 36.483464] __split_vma+0x170/0x950 [ 36.483933] split_vma+0xc6/0x110 [ 36.484380] mprotect_fixup+0x8d2/0xb30 [ 36.484876] do_mprotect_pkey+0x87e/0xd40 [ 36.485394] __x64_sys_mprotect+0x78/0xc0 [ 36.485919] do_syscall_64+0x3f/0x90 [ 36.486392] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.487031] [ 36.487244] Freed by task 13: [ 36.487625] kasan_save_stack+0x22/0x50 [ 36.488137] kasan_set_track+0x25/0x30 [ 36.488626] kasan_save_free_info+0x2b/0x50 [ 36.489167] __kasan_slab_free+0x10a/0x190 [ 36.489696] kmem_cache_free+0x10d/0x4d0 [ 36.490205] rcu_core+0x8c8/0x2860 [ 36.490647] __do_softirq+0x1b7/0x7d4 [ 36.491125] [ 36.491338] Last potentially related work creation: [ 36.491933] kasan_save_stack+0x22/0x50 [ 36.492457] __kasan_record_aux_stack+0x8e/0xa0 [ 36.493040] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.493704] remove_vma+0x139/0x170 [ 36.494166] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.494725] do_vmi_munmap+0x1f1/0x2b0 [ 36.495214] __vm_munmap+0x138/0x3a0 [ 36.495686] __x64_sys_munmap+0x59/0x80 [ 36.496202] do_syscall_64+0x3f/0x90 [ 36.496686] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.497333] [ 36.497551] The buggy address belongs to the object at ffff88800f3869f8 [ 36.497551] which belongs to the cache vm_area_struct of size 168 [ 36.499023] The buggy address is located 88 bytes inside of [ 36.499023] freed 168-byte region [ffff88800f3869f8, ffff88800f386aa0) [ 36.500449] [ 36.500665] The buggy address belongs to the physical page: [ 36.501315] page:000000006409cc67 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf386 [ 36.502391] memcg:ffff888016d08701 [ 36.502818] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 36.503507] page_type: 0xffffffff() [ 36.503954] raw: 0100000000000200 ffff88800879fc80 ffffea00003ce0c0 dead000000000003 [ 36.504888] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016d08701 [ 36.505799] page dumped because: kasan: bad access detected [ 36.506467] [ 36.506684] Memory state around the buggy address: [ 36.507256] ffff88800f386900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 36.508122] ffff88800f386980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 36.508971] >ffff88800f386a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.509814] ^ [ 36.510510] ffff88800f386a80: fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 [ 36.511360] ffff88800f386b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 36.512237] ================================================================== [ 36.513202] Disabling lock debugging due to kernel taint [ 38.457698] BUG: Bad rss-counter state mm:0000000090ee4f3c type:MM_FILEPAGES val:33 [ 38.458855] BUG: Bad rss-counter state mm:0000000090ee4f3c type:MM_ANONPAGES val:22 [ 38.950189] BUG: Bad rss-counter state mm:0000000047ae0671 type:MM_FILEPAGES val:33 [ 38.951449] BUG: Bad rss-counter state mm:0000000047ae0671 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:26430' (ECDSA) to the list of known hosts. 2023/06/20 02:23:10 fuzzer started 2023/06/20 02:23:10 dialing manager at localhost:44161 2023/06/20 02:23:11 checking machine... 2023/06/20 02:23:11 checking revisions... [ 39.653860] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:23:11 testing simple program... [ 39.704762] cgroup: Unknown subsys name 'net' [ 39.739550] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:23:06 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007f1640787090 CR3=000000000ee86000 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=676eeda33f58e5ae0b4d0e7538a6c718 XMM02=000000000011e618eff9b2d0a8fce9cb XMM03=000000000011e6e82c67c8bc2e329bc3 XMM04=b382541f2d27e13d00000000000ae988 XMM05=19e9129bd510f2350000000000134ce8 XMM06=4fda316b135da52b0000000000134b70 XMM07=e042d86d42eb936e0000000000125358 XMM08=ad36635099ce3174000000000011e6e8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff8186bd8f RBX=ffffffff85e03a14 RCX=ffffffff8186bd0a RDX=0000000000000000 RSI=ffffffff86141cfc RDI=ffffffff85e039f4 RBP=ffffffff85e039f4 RSP=ffff88800fcff9e8 R8 =ffffffff86141cfc R9 =ffff88800fcffae0 R10=0000000000038001 R11=0000000000022988 R12=ffffffff85e03a10 R13=ffffffff85e039f4 R14=ffffffff85e039f4 R15=dffffc0000000000 RIP=ffffffff8112fca2 RFL=00000212 [----A--] 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 00007f99f62fe900 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=00007f99f68b5618 CR3=000000000ed8c000 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=563412feff00545000000000000080fe 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