syzkaller login: [ 30.763165] BUG: Bad rss-counter state mm:000000006f2466c7 type:MM_FILEPAGES val:33 [ 30.764185] BUG: Bad rss-counter state mm:000000006f2466c7 type:MM_ANONPAGES val:22 [ 30.929297] ================================================================== [ 30.930209] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.931149] Read of size 8 at addr ffff888015e0bc20 by task sshd/220 [ 30.931919] [ 30.932142] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.933196] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.934191] Call Trace: [ 30.934513] [ 30.934819] dump_stack_lvl+0x91/0xf0 [ 30.935314] print_report+0xcc/0x620 [ 30.935813] ? __virt_addr_valid+0x102/0x340 [ 30.936377] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.936994] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.937613] kasan_report+0xbe/0xf0 [ 30.938097] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.938723] vma_interval_tree_remove+0xc75/0xec0 [ 30.939330] vma_prepare+0xc54/0x11a0 [ 30.939816] __split_vma+0x5af/0x950 [ 30.940288] ? __pfx___split_vma+0x10/0x10 [ 30.940813] ? find_held_lock+0x2c/0x110 [ 30.941342] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.941904] ? lock_is_held_type+0x9f/0x120 [ 30.942451] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.943052] ? mtree_range_walk+0x632/0x900 [ 30.943630] ? mas_walk+0x5c7/0x7c0 [ 30.944110] do_vmi_munmap+0x1f1/0x2b0 [ 30.944598] mmap_region+0x1f9/0x2660 [ 30.945086] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.945608] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.946316] ? __pfx_lock_acquire+0x10/0x10 [ 30.946844] ? __pfx_mmap_region+0x10/0x10 [ 30.947384] ? security_mmap_addr+0x7d/0xa0 [ 30.947923] ? get_unmapped_area+0x1f5/0x3f0 [ 30.948476] do_mmap+0x854/0xf00 [ 30.948914] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.949411] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.949970] ksys_mmap_pgoff+0x3af/0x500 [ 30.950474] do_syscall_64+0x3f/0x90 [ 30.950952] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.951606] RIP: 0033:0x7f7e32ab9d82 [ 30.952061] 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 [ 30.954164] RSP: 002b:00007ffe8ff9dbc8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.955069] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7e32ab9d82 [ 30.955944] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7e31ef3000 [ 30.956781] RBP: 00007f7e31ef3000 R08: 0000000000000009 R09: 0000000000001000 [ 30.957618] R10: 0000000000000812 R11: 0000000000000206 R12: 00005599ae5d8ec0 [ 30.958463] R13: 00007ffe8ff9dbe0 R14: 00007ffe8ff9dc10 R15: 00007ffe8ff9df70 [ 30.959314] [ 30.959614] [ 30.959831] Allocated by task 213: [ 30.960262] kasan_save_stack+0x22/0x50 [ 30.960768] kasan_set_track+0x25/0x30 [ 30.961259] __kasan_slab_alloc+0x59/0x70 [ 30.961784] kmem_cache_alloc+0x16b/0x370 [ 30.962299] vm_area_dup+0x20/0x160 [ 30.962755] __split_vma+0x170/0x950 [ 30.963219] split_vma+0xc6/0x110 [ 30.963671] mprotect_fixup+0x8d2/0xb30 [ 30.964174] do_mprotect_pkey+0x87e/0xd40 [ 30.964689] __x64_sys_mprotect+0x78/0xc0 [ 30.965205] do_syscall_64+0x3f/0x90 [ 30.965681] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.966322] [ 30.966539] Freed by task 213: [ 30.966932] kasan_save_stack+0x22/0x50 [ 30.967454] kasan_set_track+0x25/0x30 [ 30.967945] kasan_save_free_info+0x2b/0x50 [ 30.968477] __kasan_slab_free+0x10a/0x190 [ 30.969008] kmem_cache_free+0x10d/0x4d0 [ 30.969515] rcu_core+0x8c8/0x2860 [ 30.969958] __do_softirq+0x1b7/0x7d4 [ 30.970439] [ 30.970654] Last potentially related work creation: [ 30.971238] kasan_save_stack+0x22/0x50 [ 30.971753] __kasan_record_aux_stack+0x8e/0xa0 [ 30.972328] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.972961] remove_vma+0x139/0x170 [ 30.973518] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.974075] do_vmi_munmap+0x1f1/0x2b0 [ 30.974575] __vm_munmap+0x138/0x3a0 [ 30.975041] __x64_sys_munmap+0x59/0x80 [ 30.975556] do_syscall_64+0x3f/0x90 [ 30.976040] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.976689] [ 30.976903] The buggy address belongs to the object at ffff888015e0bbc8 [ 30.976903] which belongs to the cache vm_area_struct of size 168 [ 30.978382] The buggy address is located 88 bytes inside of [ 30.978382] freed 168-byte region [ffff888015e0bbc8, ffff888015e0bc70) [ 30.979785] [ 30.980004] The buggy address belongs to the physical page: [ 30.980666] page:00000000976da3e1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15e0b [ 30.981755] memcg:ffff8880169a7e01 [ 30.982179] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.982894] page_type: 0xffffffff() [ 30.983342] raw: 0100000000000200 ffff8880087a0c80 ffffea0000263840 dead000000000007 [ 30.984265] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880169a7e01 [ 30.985163] page dumped because: kasan: bad access detected [ 30.985822] [ 30.986034] Memory state around the buggy address: [ 30.986614] ffff888015e0bb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.987473] ffff888015e0bb80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.988320] >ffff888015e0bc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.989182] ^ [ 30.989709] ffff888015e0bc80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 30.990566] ffff888015e0bd00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 30.991427] ================================================================== [ 30.992360] Disabling lock debugging due to kernel taint [ 33.780677] BUG: Bad rss-counter state mm:000000002f5f474f type:MM_FILEPAGES val:33 [ 33.781876] BUG: Bad rss-counter state mm:000000002f5f474f type:MM_ANONPAGES val:22 [ 34.180831] BUG: Bad rss-counter state mm:000000007d289054 type:MM_FILEPAGES val:33 [ 34.181988] BUG: Bad rss-counter state mm:000000007d289054 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:16493' (ECDSA) to the list of known hosts. 2023/06/21 03:48:17 fuzzer started 2023/06/21 03:48:17 dialing manager at localhost:36067 2023/06/21 03:48:17 checking machine... 2023/06/21 03:48:17 checking revisions... [ 34.841910] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:48:17 testing simple program... [ 34.883091] cgroup: Unknown subsys name 'net' [ 34.923495] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:48:17 Registers: info registers vcpu 0 RAX=0000000000000007 RBX=0000000000000001 RCX=ffffffff83c1130b RDX=000000000002c113 RSI=000000000002c113 RDI=ffffffff86599e3c RBP=ffff888016b8f340 RSP=ffff888016b8f278 R8 =0000000000000000 R9 =ffff888016b8f328 R10=0000000000038001 R11=000000000009a7d7 R12=ffff888016b8f348 R13=ffff888016b8f330 R14=ffff888016b8f329 R15=ffff888016b8f2e8 RIP=ffffffff811307c2 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 00007f7dce392700 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=00007fcfb6421618 CR3=000000000c528000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3932325b646873732036313a3834 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363232 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 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=0000000000000001 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=00007f9e85d10160 CR3=00000000090a2000 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=10e33bf1157f46a668401e79b232ed09 XMM02=00000000001191f0eff9b2d0a8fce9cb XMM03=00000000001192c02c67c8bc2e329bc3 XMM04=6d45ade1dd7ebc5e00000000000ae988 XMM05=19e9129bd510f2350000000000130780 XMM06=fe09c9a10e01daa9000000000012ee80 XMM07=e042d86d42eb936e0000000000120968 XMM08=a247b6d333f042c500000000001192c0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000