syzkaller login: [ 41.297598] BUG: Bad rss-counter state mm:0000000060c3d3c1 type:MM_FILEPAGES val:33 [ 41.298760] BUG: Bad rss-counter state mm:0000000060c3d3c1 type:MM_ANONPAGES val:22 [ 41.448236] ================================================================== [ 41.449338] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 41.450497] Read of size 8 at addr ffff888019efc5c8 by task sshd/219 [ 41.451588] [ 41.451857] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 41.452834] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 41.453883] Call Trace: [ 41.454226] [ 41.454524] dump_stack_lvl+0x91/0xf0 [ 41.455025] print_report+0xcc/0x620 [ 41.455524] ? __virt_addr_valid+0x102/0x340 [ 41.456107] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.456754] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.457415] kasan_report+0xbe/0xf0 [ 41.457917] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.458587] vma_interval_tree_remove+0xc75/0xec0 [ 41.459209] vma_prepare+0xc54/0x11a0 [ 41.459716] __split_vma+0x5af/0x950 [ 41.460196] ? __pfx___split_vma+0x10/0x10 [ 41.460726] ? find_held_lock+0x2c/0x110 [ 41.461248] do_vmi_align_munmap+0x2ba/0x11f0 [ 41.461849] ? lock_is_held_type+0x9f/0x120 [ 41.462387] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 41.463047] ? mtree_range_walk+0x632/0x900 [ 41.463637] ? mas_walk+0x5c7/0x7c0 [ 41.464142] do_vmi_munmap+0x1f1/0x2b0 [ 41.464636] mmap_region+0x1f9/0x2660 [ 41.465115] ? vm_mmap_pgoff+0x15c/0x3a0 [ 41.465632] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 41.466346] ? __pfx_lock_acquire+0x10/0x10 [ 41.466876] ? __pfx_mmap_region+0x10/0x10 [ 41.467408] ? security_mmap_addr+0x7d/0xa0 [ 41.467940] ? get_unmapped_area+0x1f5/0x3f0 [ 41.468488] do_mmap+0x854/0xf00 [ 41.468925] vm_mmap_pgoff+0x1a6/0x3a0 [ 41.469420] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 41.469974] ksys_mmap_pgoff+0x3af/0x500 [ 41.470482] do_syscall_64+0x3f/0x90 [ 41.470958] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.471598] RIP: 0033:0x7f0c7d3d9d82 [ 41.472061] 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 [ 41.474175] RSP: 002b:00007ffdcb68a618 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 41.475069] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0c7d3d9d82 [ 41.475923] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0c7c813000 [ 41.476771] RBP: 00007f0c7c813000 R08: 0000000000000009 R09: 0000000000001000 [ 41.477617] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564a4f5dcec0 [ 41.478463] R13: 00007ffdcb68a630 R14: 00007ffdcb68a660 R15: 00007ffdcb68a9c0 [ 41.479309] [ 41.479601] [ 41.479817] Allocated by task 212: [ 41.480255] kasan_save_stack+0x22/0x50 [ 41.480762] kasan_set_track+0x25/0x30 [ 41.481250] __kasan_slab_alloc+0x59/0x70 [ 41.481768] kmem_cache_alloc+0x16b/0x370 [ 41.482282] vm_area_dup+0x20/0x160 [ 41.482735] __split_vma+0x170/0x950 [ 41.483200] split_vma+0xc6/0x110 [ 41.483645] mprotect_fixup+0x8d2/0xb30 [ 41.484166] do_mprotect_pkey+0x87e/0xd40 [ 41.484685] __x64_sys_mprotect+0x78/0xc0 [ 41.485211] do_syscall_64+0x3f/0x90 [ 41.485676] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.486311] [ 41.486527] Freed by task 212: [ 41.486920] kasan_save_stack+0x22/0x50 [ 41.487438] kasan_set_track+0x25/0x30 [ 41.487962] kasan_save_free_info+0x2b/0x50 [ 41.488492] __kasan_slab_free+0x10a/0x190 [ 41.489024] kmem_cache_free+0x10d/0x4d0 [ 41.489540] rcu_core+0x8c8/0x2860 [ 41.489987] __do_softirq+0x1b7/0x7d4 [ 41.490469] [ 41.490681] Last potentially related work creation: [ 41.491269] kasan_save_stack+0x22/0x50 [ 41.491771] __kasan_record_aux_stack+0x8e/0xa0 [ 41.492352] __call_rcu_common.constprop.0+0x6a/0xb90 [ 41.493074] remove_vma+0x139/0x170 [ 41.493526] do_vmi_align_munmap+0xd4a/0x11f0 [ 41.494085] do_vmi_munmap+0x1f1/0x2b0 [ 41.494569] __vm_munmap+0x138/0x3a0 [ 41.495038] __x64_sys_munmap+0x59/0x80 [ 41.495531] do_syscall_64+0x3f/0x90 [ 41.496032] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.496674] [ 41.496890] The buggy address belongs to the object at ffff888019efc570 [ 41.496890] which belongs to the cache vm_area_struct of size 168 [ 41.498350] The buggy address is located 88 bytes inside of [ 41.498350] freed 168-byte region [ffff888019efc570, ffff888019efc618) [ 41.499756] [ 41.499984] The buggy address belongs to the physical page: [ 41.500640] page:0000000068b627ac refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19efc [ 41.501720] memcg:ffff88800cd2a301 [ 41.502143] flags: 0x100000000000200(slab|node=0|zone=1) [ 41.502784] page_type: 0xffffffff() [ 41.503233] raw: 0100000000000200 ffff88800879fc80 ffffea000036d300 dead000000000004 [ 41.504155] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cd2a301 [ 41.505048] page dumped because: kasan: bad access detected [ 41.505713] [ 41.505929] Memory state around the buggy address: [ 41.506510] ffff888019efc480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 41.507360] ffff888019efc500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 41.508224] >ffff888019efc580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 41.509073] ^ [ 41.509734] ffff888019efc600: fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 [ 41.510596] ffff888019efc680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 41.511436] ================================================================== [ 41.512355] Disabling lock debugging due to kernel taint [ 43.637896] BUG: Bad rss-counter state mm:000000007194d7b7 type:MM_FILEPAGES val:33 [ 43.639065] BUG: Bad rss-counter state mm:000000007194d7b7 type:MM_ANONPAGES val:22 [ 44.043313] BUG: Bad rss-counter state mm:000000004129d966 type:MM_FILEPAGES val:33 [ 44.044596] BUG: Bad rss-counter state mm:000000004129d966 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:19668' (ECDSA) to the list of known hosts. 2023/06/20 04:33:43 fuzzer started 2023/06/20 04:33:43 dialing manager at localhost:44161 2023/06/20 04:33:43 checking machine... 2023/06/20 04:33:43 checking revisions... [ 44.792544] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:33:44 testing simple program... [ 44.840710] cgroup: Unknown subsys name 'net' [ 44.904559] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:33:33 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000002 RCX=ffffffff86096756 RDX=1ffff1100d9c135c RSI=0000000000000001 RDI=0000000000000001 RBP=ffff88806ce09af0 RSP=ffff88806ce099d8 R8 =ffffffff8609675a R9 =0000000000000000 R10=0000000000038001 R11=0000000000006097 R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=0000000000000005 R15=ffff88806ce09a98 RIP=ffffffff81130b54 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 00007ff004b27900 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=00007ff0050dc650 CR3=000000000ebe8000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 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=00007ffece8378c8 CR3=0000000016c40000 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=2033343a33333a3430203032206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033343a33333a3430203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000