syzkaller login: [ 36.336754] BUG: Bad rss-counter state mm:00000000d1da1eb4 type:MM_FILEPAGES val:33 [ 36.337850] BUG: Bad rss-counter state mm:00000000d1da1eb4 type:MM_ANONPAGES val:22 [ 36.496012] ================================================================== [ 36.496861] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.497765] Read of size 8 at addr ffff888018174a50 by task sshd/219 [ 36.498482] [ 36.498692] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.499697] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.500608] Call Trace: [ 36.500908] [ 36.501181] dump_stack_lvl+0x91/0xf0 [ 36.501656] print_report+0xcc/0x620 [ 36.502119] ? __virt_addr_valid+0x102/0x340 [ 36.502635] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.503219] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.503796] kasan_report+0xbe/0xf0 [ 36.504255] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.504850] vma_interval_tree_remove+0xc75/0xec0 [ 36.505432] vma_prepare+0xc54/0x11a0 [ 36.505931] __split_vma+0x5af/0x950 [ 36.506392] ? __pfx___split_vma+0x10/0x10 [ 36.506908] ? find_held_lock+0x2c/0x110 [ 36.507417] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.507974] ? lock_is_held_type+0x9f/0x120 [ 36.508491] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.509072] ? mtree_range_walk+0x632/0x900 [ 36.509603] ? mas_walk+0x5c7/0x7c0 [ 36.510082] do_vmi_munmap+0x1f1/0x2b0 [ 36.510553] mmap_region+0x1f9/0x2660 [ 36.511023] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.511519] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.512216] ? __pfx_lock_acquire+0x10/0x10 [ 36.512731] ? __pfx_mmap_region+0x10/0x10 [ 36.513255] ? security_mmap_addr+0x7d/0xa0 [ 36.513777] ? get_unmapped_area+0x1f5/0x3f0 [ 36.514314] do_mmap+0x854/0xf00 [ 36.514735] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.515222] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.515773] ksys_mmap_pgoff+0x3af/0x500 [ 36.516262] do_syscall_64+0x3f/0x90 [ 36.516723] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.517348] RIP: 0033:0x7f78ff135d82 [ 36.517806] 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 [ 36.519874] RSP: 002b:00007ffc0dec3ef8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.520740] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f78ff135d82 [ 36.521555] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f78fe56f000 [ 36.522390] RBP: 00007f78fe56f000 R08: 0000000000000009 R09: 0000000000001000 [ 36.523220] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c34cf35d90 [ 36.524033] R13: 00007ffc0dec3f10 R14: 00007ffc0dec3f40 R15: 00007ffc0dec42a0 [ 36.524846] [ 36.525120] [ 36.525322] Allocated by task 212: [ 36.525735] kasan_save_stack+0x22/0x50 [ 36.526208] kasan_set_track+0x25/0x30 [ 36.526673] __kasan_slab_alloc+0x59/0x70 [ 36.527168] kmem_cache_alloc+0x16b/0x370 [ 36.527649] vm_area_dup+0x20/0x160 [ 36.528077] __split_vma+0x170/0x950 [ 36.528515] split_vma+0xc6/0x110 [ 36.528930] mprotect_fixup+0x8d2/0xb30 [ 36.529412] do_mprotect_pkey+0x87e/0xd40 [ 36.529945] __x64_sys_mprotect+0x78/0xc0 [ 36.530455] do_syscall_64+0x3f/0x90 [ 36.530915] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.531527] [ 36.531737] Freed by task 212: [ 36.532122] kasan_save_stack+0x22/0x50 [ 36.532610] kasan_set_track+0x25/0x30 [ 36.533089] kasan_save_free_info+0x2b/0x50 [ 36.533596] __kasan_slab_free+0x10a/0x190 [ 36.534129] kmem_cache_free+0x10d/0x4d0 [ 36.534625] rcu_core+0x8c8/0x2860 [ 36.535068] __do_softirq+0x1b7/0x7d4 [ 36.535522] [ 36.535735] Last potentially related work creation: [ 36.536302] kasan_save_stack+0x22/0x50 [ 36.536789] __kasan_record_aux_stack+0x8e/0xa0 [ 36.537340] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.537971] remove_vma+0x139/0x170 [ 36.538412] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.538958] do_vmi_munmap+0x1f1/0x2b0 [ 36.539425] __vm_munmap+0x138/0x3a0 [ 36.539876] __x64_sys_munmap+0x59/0x80 [ 36.540421] do_syscall_64+0x3f/0x90 [ 36.540891] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.541506] [ 36.541724] The buggy address belongs to the object at ffff8880181749f8 [ 36.541724] which belongs to the cache vm_area_struct of size 168 [ 36.543136] The buggy address is located 88 bytes inside of [ 36.543136] freed 168-byte region [ffff8880181749f8, ffff888018174aa0) [ 36.544495] [ 36.544710] The buggy address belongs to the physical page: [ 36.545345] page:0000000044612d29 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18174 [ 36.546436] memcg:ffff8880169bd401 [ 36.546849] flags: 0x100000000000200(slab|node=0|zone=1) [ 36.547474] page_type: 0xffffffff() [ 36.547915] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 36.548790] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880169bd401 [ 36.549668] page dumped because: kasan: bad access detected [ 36.550319] [ 36.550527] Memory state around the buggy address: [ 36.551092] ffff888018174900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 36.551917] ffff888018174980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 36.552755] >ffff888018174a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.553557] ^ [ 36.554232] ffff888018174a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 36.555035] ffff888018174b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.555838] ================================================================== [ 36.556916] Disabling lock debugging due to kernel taint [ 38.618101] BUG: Bad rss-counter state mm:00000000b5da0db3 type:MM_FILEPAGES val:33 [ 38.619522] BUG: Bad rss-counter state mm:00000000b5da0db3 type:MM_ANONPAGES val:22 [ 39.102866] BUG: Bad rss-counter state mm:00000000f47ffda7 type:MM_FILEPAGES val:33 [ 39.104146] BUG: Bad rss-counter state mm:00000000f47ffda7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:47702' (ECDSA) to the list of known hosts. 2023/06/20 03:56:18 fuzzer started 2023/06/20 03:56:18 dialing manager at localhost:44161 2023/06/20 03:56:18 checking machine... 2023/06/20 03:56:18 checking revisions... [ 39.828293] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:56:18 testing simple program... [ 39.882718] cgroup: Unknown subsys name 'net' [ 39.927462] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:56:12 Registers: info registers vcpu 0 RAX=0000000000000020 RBX=0000000000000002 RCX=0000000000000000 RDX=1ffff11001fa1b2e RSI=ffffffff849c0ac0 RDI=0000000000000002 RBP=ffffffff849c0ac0 RSP=ffff88801c997e70 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000002 R13=ffff88800d178a00 R14=0000000000000002 R15=ffff88800dbf6280 RIP=ffffffff814c03f6 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 00007f1bf7230900 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=00007ffe024d7000 CR3=000000000f7a2000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=00000016e75abf18 RBX=0000000000000000 RCX=00000000000006e0 RDX=0000000000000016 RSI=ffff88806cf28140 RDI=0000000000053173 RBP=ffff88806cf28140 RSP=ffff88806cf09ee0 R8 =0000000000000007 R9 =0000000000000000 R10=00000000000edd93 R11=ffff88806cf09ff8 R12=0000000000053173 R13=0000000000000000 R14=0000000000000000 R15=ffff88806cf2b940 RIP=ffffffff811062a5 RFL=00000013 [----A-C] 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=00007faf322a2a20 CR3=000000000f7a4000 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=2037313a36353a3330203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037313a36353a3330203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000