syzkaller login: [ 46.388179] BUG: Bad rss-counter state mm:00000000a5a8a48d type:MM_FILEPAGES val:33 [ 46.389636] BUG: Bad rss-counter state mm:00000000a5a8a48d type:MM_ANONPAGES val:22 [ 46.540147] ================================================================== [ 46.541066] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 46.542023] Read of size 8 at addr ffff8880164ce228 by task sshd/220 [ 46.542917] [ 46.543145] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 46.544011] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 46.545005] Call Trace: [ 46.545324] [ 46.545610] dump_stack_lvl+0x91/0xf0 [ 46.546104] print_report+0xcc/0x620 [ 46.546590] ? __virt_addr_valid+0x102/0x340 [ 46.547164] ? vma_interval_tree_remove+0xc75/0xec0 [ 46.547781] ? vma_interval_tree_remove+0xc75/0xec0 [ 46.548406] kasan_report+0xbe/0xf0 [ 46.548882] ? vma_interval_tree_remove+0xc75/0xec0 [ 46.549504] vma_interval_tree_remove+0xc75/0xec0 [ 46.550100] vma_prepare+0xc54/0x11a0 [ 46.550582] __split_vma+0x5af/0x950 [ 46.551071] ? __pfx___split_vma+0x10/0x10 [ 46.551601] ? find_held_lock+0x2c/0x110 [ 46.552124] do_vmi_align_munmap+0x2ba/0x11f0 [ 46.552689] ? lock_is_held_type+0x9f/0x120 [ 46.553227] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 46.553842] ? mtree_range_walk+0x632/0x900 [ 46.554396] ? mas_walk+0x5c7/0x7c0 [ 46.554883] do_vmi_munmap+0x1f1/0x2b0 [ 46.555383] mmap_region+0x1f9/0x2660 [ 46.555859] ? vm_mmap_pgoff+0x15c/0x3a0 [ 46.556386] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 46.557113] ? __pfx_lock_acquire+0x10/0x10 [ 46.557645] ? __pfx_mmap_region+0x10/0x10 [ 46.558178] ? security_mmap_addr+0x7d/0xa0 [ 46.558725] ? get_unmapped_area+0x1f5/0x3f0 [ 46.559274] do_mmap+0x854/0xf00 [ 46.559714] vm_mmap_pgoff+0x1a6/0x3a0 [ 46.560221] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 46.560789] ksys_mmap_pgoff+0x3af/0x500 [ 46.561308] do_syscall_64+0x3f/0x90 [ 46.561786] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 46.562437] RIP: 0033:0x7f1d6898ed82 [ 46.562901] 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 [ 46.565012] RSP: 002b:00007fff83c8f288 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 46.565919] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1d6898ed82 [ 46.566777] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1d67dc8000 [ 46.567617] RBP: 00007f1d67dc8000 R08: 0000000000000009 R09: 0000000000001000 [ 46.568465] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ae0e4ecec0 [ 46.569322] R13: 00007fff83c8f2a0 R14: 00007fff83c8f2d0 R15: 00007fff83c8f630 [ 46.570176] [ 46.570464] [ 46.570703] Allocated by task 213: [ 46.571140] kasan_save_stack+0x22/0x50 [ 46.571645] kasan_set_track+0x25/0x30 [ 46.572134] __kasan_slab_alloc+0x59/0x70 [ 46.572664] kmem_cache_alloc+0x16b/0x370 [ 46.573179] vm_area_dup+0x20/0x160 [ 46.573630] __split_vma+0x170/0x950 [ 46.574097] split_vma+0xc6/0x110 [ 46.574543] mprotect_fixup+0x8d2/0xb30 [ 46.575055] do_mprotect_pkey+0x87e/0xd40 [ 46.575572] __x64_sys_mprotect+0x78/0xc0 [ 46.576099] do_syscall_64+0x3f/0x90 [ 46.576574] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 46.577213] [ 46.577429] Freed by task 213: [ 46.577819] kasan_save_stack+0x22/0x50 [ 46.578317] kasan_set_track+0x25/0x30 [ 46.578825] kasan_save_free_info+0x2b/0x50 [ 46.579356] __kasan_slab_free+0x10a/0x190 [ 46.579896] kmem_cache_free+0x10d/0x4d0 [ 46.580406] rcu_core+0x8c8/0x2860 [ 46.580858] __do_softirq+0x1b7/0x7d4 [ 46.581340] [ 46.581554] Last potentially related work creation: [ 46.582150] kasan_save_stack+0x22/0x50 [ 46.582648] __kasan_record_aux_stack+0x8e/0xa0 [ 46.583242] __call_rcu_common.constprop.0+0x6a/0xb90 [ 46.583890] remove_vma+0x139/0x170 [ 46.584353] do_vmi_align_munmap+0xd4a/0x11f0 [ 46.584913] do_vmi_munmap+0x1f1/0x2b0 [ 46.585412] __vm_munmap+0x138/0x3a0 [ 46.585886] __x64_sys_munmap+0x59/0x80 [ 46.586389] do_syscall_64+0x3f/0x90 [ 46.586883] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 46.587532] [ 46.587752] The buggy address belongs to the object at ffff8880164ce1d0 [ 46.587752] which belongs to the cache vm_area_struct of size 168 [ 46.589233] The buggy address is located 88 bytes inside of [ 46.589233] freed 168-byte region [ffff8880164ce1d0, ffff8880164ce278) [ 46.590673] [ 46.590899] The buggy address belongs to the physical page: [ 46.591557] page:00000000bd412795 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x164ce [ 46.592648] memcg:ffff8880181f7501 [ 46.593079] flags: 0x100000000000200(slab|node=0|zone=1) [ 46.593719] page_type: 0xffffffff() [ 46.594166] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 46.595095] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880181f7501 [ 46.596019] page dumped because: kasan: bad access detected [ 46.596679] [ 46.596896] Memory state around the buggy address: [ 46.597479] ffff8880164ce100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 46.598333] ffff8880164ce180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 46.599202] >ffff8880164ce200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 46.600052] ^ [ 46.600606] ffff8880164ce280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 46.601457] ffff8880164ce300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 46.602306] ================================================================== [ 46.603368] Disabling lock debugging due to kernel taint [ 48.547450] BUG: Bad rss-counter state mm:000000001c717ac6 type:MM_FILEPAGES val:33 [ 48.548594] BUG: Bad rss-counter state mm:000000001c717ac6 type:MM_ANONPAGES val:22 [ 49.023967] BUG: Bad rss-counter state mm:00000000d1b14fae type:MM_FILEPAGES val:33 [ 49.025131] BUG: Bad rss-counter state mm:00000000d1b14fae type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:6544' (ECDSA) to the list of known hosts. 2023/06/20 03:19:56 fuzzer started 2023/06/20 03:19:56 dialing manager at localhost:44161 2023/06/20 03:19:56 checking machine... 2023/06/20 03:19:56 checking revisions... [ 49.658577] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:19:56 testing simple program... [ 49.707137] cgroup: Unknown subsys name 'net' [ 49.762626] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:19:40 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=00007ffd01dbed08 CR3=000000000f26a000 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=2035353a39313a3330203032206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035353a39313a3330203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff846000aa RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff110032aef47 RSI=ffff888019577f48 RDI=ffffffff846000aa RBP=ffff888019577a38 RSP=ffff8880195779d0 R8 =0000000000000001 R9 =ffff888019577a20 R10=0000000000038001 R11=00000000000b4fb9 R12=ffff888019577aa8 R13=0000000000000000 R14=ffff88800c779b40 R15=ffff88800fbab000 RIP=ffffffff811303b9 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 00007fef1ee8f900 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=00007fef1f446618 CR3=000000001bdc6000 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=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