syzkaller login: [ 32.443005] BUG: Bad rss-counter state mm:0000000061bb5223 type:MM_FILEPAGES val:33 [ 32.443748] BUG: Bad rss-counter state mm:0000000061bb5223 type:MM_ANONPAGES val:22 [ 32.562011] ================================================================== [ 32.563032] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.564086] Read of size 8 at addr ffff88800ff6e058 by task sshd/221 [ 32.565082] [ 32.565265] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.565782] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.566379] Call Trace: [ 32.566575] [ 32.566771] dump_stack_lvl+0x91/0xf0 [ 32.567071] print_report+0xcc/0x620 [ 32.567366] ? __virt_addr_valid+0x102/0x340 [ 32.567702] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.568076] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.568449] kasan_report+0xbe/0xf0 [ 32.568740] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.569116] vma_interval_tree_remove+0xc75/0xec0 [ 32.569482] vma_prepare+0xc54/0x11a0 [ 32.569774] __split_vma+0x5af/0x950 [ 32.570070] ? __pfx___split_vma+0x10/0x10 [ 32.570392] ? find_held_lock+0x2c/0x110 [ 32.570711] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.571054] ? lock_is_held_type+0x9f/0x120 [ 32.571386] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.571755] ? mtree_range_walk+0x632/0x900 [ 32.572090] ? mas_walk+0x5c7/0x7c0 [ 32.572378] do_vmi_munmap+0x1f1/0x2b0 [ 32.572679] mmap_region+0x1f9/0x2660 [ 32.572973] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.573285] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.573717] ? __pfx_lock_acquire+0x10/0x10 [ 32.574055] ? __pfx_mmap_region+0x10/0x10 [ 32.574379] ? security_mmap_addr+0x7d/0xa0 [ 32.574702] ? get_unmapped_area+0x1f5/0x3f0 [ 32.575035] do_mmap+0x854/0xf00 [ 32.575303] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.575605] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.575947] ksys_mmap_pgoff+0x3af/0x500 [ 32.576255] do_syscall_64+0x3f/0x90 [ 32.576546] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.576939] RIP: 0033:0x7f420eb76d82 [ 32.577216] 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 [ 32.578496] RSP: 002b:00007ffef2936c18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.579042] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f420eb76d82 [ 32.579553] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f420dfb0000 [ 32.580063] RBP: 00007f420dfb0000 R08: 0000000000000009 R09: 0000000000001000 [ 32.580572] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555cdf4acf70 [ 32.581083] R13: 00007ffef2936c30 R14: 00007ffef2936c60 R15: 00007ffef2936fc0 [ 32.581599] [ 32.581778] [ 32.581926] Allocated by task 214: [ 32.582188] kasan_save_stack+0x22/0x50 [ 32.582496] kasan_set_track+0x25/0x30 [ 32.582797] __kasan_slab_alloc+0x59/0x70 [ 32.583116] kmem_cache_alloc+0x16b/0x370 [ 32.583429] vm_area_dup+0x20/0x160 [ 32.583706] __split_vma+0x170/0x950 [ 32.583990] split_vma+0xc6/0x110 [ 32.584257] mprotect_fixup+0x8d2/0xb30 [ 32.584562] do_mprotect_pkey+0x87e/0xd40 [ 32.584881] __x64_sys_mprotect+0x78/0xc0 [ 32.585197] do_syscall_64+0x3f/0x90 [ 32.585484] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.585873] [ 32.586012] Freed by task 211: [ 32.586251] kasan_save_stack+0x22/0x50 [ 32.586557] kasan_set_track+0x25/0x30 [ 32.586858] kasan_save_free_info+0x2b/0x50 [ 32.587182] __kasan_slab_free+0x10a/0x190 [ 32.587505] kmem_cache_free+0x10d/0x4d0 [ 32.587815] rcu_core+0x8c8/0x2860 [ 32.588087] __do_softirq+0x1b7/0x7d4 [ 32.588382] [ 32.588514] Last potentially related work creation: [ 32.588869] kasan_save_stack+0x22/0x50 [ 32.589176] __kasan_record_aux_stack+0x8e/0xa0 [ 32.589523] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.589926] remove_vma+0x139/0x170 [ 32.590204] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.590550] do_vmi_munmap+0x1f1/0x2b0 [ 32.590848] __vm_munmap+0x138/0x3a0 [ 32.591135] __x64_sys_munmap+0x59/0x80 [ 32.591438] do_syscall_64+0x3f/0x90 [ 32.591732] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.592130] [ 32.592265] The buggy address belongs to the object at ffff88800ff6e000 [ 32.592265] which belongs to the cache vm_area_struct of size 168 [ 32.593163] The buggy address is located 88 bytes inside of [ 32.593163] freed 168-byte region [ffff88800ff6e000, ffff88800ff6e0a8) [ 32.594030] [ 32.594164] The buggy address belongs to the physical page: [ 32.594569] page:0000000035a12a02 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xff6e [ 32.595232] memcg:ffff88801a101401 [ 32.595500] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.595903] page_type: 0xffffffff() [ 32.596180] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.596749] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a101401 [ 32.597304] page dumped because: kasan: bad access detected [ 32.597714] [ 32.597848] Memory state around the buggy address: [ 32.598207] ffff88800ff6df00: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc [ 32.598733] ffff88800ff6df80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 32.599266] >ffff88800ff6e000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.599788] ^ [ 32.600234] ffff88800ff6e080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 32.600755] ffff88800ff6e100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.601274] ================================================================== [ 32.601876] Disabling lock debugging due to kernel taint [ 34.534921] BUG: Bad rss-counter state mm:000000009dfcc671 type:MM_FILEPAGES val:33 [ 34.535914] BUG: Bad rss-counter state mm:000000009dfcc671 type:MM_ANONPAGES val:22 [ 34.997871] BUG: Bad rss-counter state mm:000000009cc55288 type:MM_FILEPAGES val:33 [ 34.999216] BUG: Bad rss-counter state mm:000000009cc55288 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62739' (ECDSA) to the list of known hosts. 2023/06/19 11:39:16 fuzzer started 2023/06/19 11:39:17 dialing manager at localhost:44161 2023/06/19 11:39:17 checking machine... 2023/06/19 11:39:17 checking revisions... [ 35.778366] kmemleak: Automatic memory scanning thread ended 2023/06/19 11:39:17 testing simple program... [ 35.832359] cgroup: Unknown subsys name 'net' [ 35.882974] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:39:15 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88800ff87580 RCX=ffffffff860d0c26 RDX=1ffff11001ff0eb0 RSI=ffff88800ff87910 RDI=ffff88800ff87580 RBP=ffff88800ff87910 RSP=ffff88800ff874d8 R8 =0000000000000001 R9 =ffff88800ff875c0 R10=0000000000038001 R11=000000000000fc0f R12=0000000000000008 R13=ffff88800ff875c8 R14=ffff88800ff87910 R15=ffff88800ff87580 RIP=ffffffff81130416 RFL=00000296 [--S-AP-] 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 00007f070f3d7900 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=00007ff8ef657650 CR3=000000000c6c6000 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=4013b429e4afc9b9fa4a0a815f353806 XMM02=eff9b2d0a8fce9cb000000000011f660 XMM03=2c67c8bc2e329bc3000000000011f788 XMM04=2cba673e4f04d4d300000000000ae988 XMM05=b3cad13b49d0650a0000000000134c68 XMM06=e9ca7fd52abfbe490000000000133a08 XMM07=fb795ef6d65770560000000000123f28 XMM08=2c67c8bc2e329bc3000000000011f788 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080010001 RBX=000000000000e12f RCX=0000000000000000 RDX=ffff888008d751c0 RSI=ffffffff813c91ee RDI=0000000000000005 RBP=0000000000000001 RSP=ffff88806cf09f78 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000001 R11=ffff88806cf09ff8 R12=0000000000000001 R13=0000000000000000 R14=0000000000000000 R15=dffffc0000000000 RIP=ffffffff813c91f0 RFL=00000046 [---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 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=00007ffc7cd55d88 CR3=0000000005482000 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=00007f3ff9218510000055b8c3c48790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000