syzkaller login: [ 170.469247] BUG: Bad rss-counter state mm:000000009479d03e type:MM_FILEPAGES val:33 [ 170.470415] BUG: Bad rss-counter state mm:000000009479d03e type:MM_ANONPAGES val:22 [ 170.505814] ================================================================== [ 170.506833] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 170.507826] Read of size 8 at addr ffff888019bebd08 by task sshd/221 [ 170.508736] [ 170.509104] CPU: 0 PID: 221 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 170.510328] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 170.511515] Call Trace: [ 170.511901] [ 170.512246] dump_stack_lvl+0x91/0xf0 [ 170.512835] print_report+0xcc/0x620 [ 170.513421] ? __virt_addr_valid+0x102/0x340 [ 170.514085] ? vma_interval_tree_remove+0xc75/0xec0 [ 170.514850] ? vma_interval_tree_remove+0xc75/0xec0 [ 170.515617] kasan_report+0xbe/0xf0 [ 170.516208] ? vma_interval_tree_remove+0xc75/0xec0 [ 170.516981] vma_interval_tree_remove+0xc75/0xec0 [ 170.517715] vma_prepare+0xc54/0x11a0 [ 170.518306] __split_vma+0x5af/0x950 [ 170.518917] ? __pfx___split_vma+0x10/0x10 [ 170.519572] ? find_held_lock+0x2c/0x110 [ 170.520105] do_vmi_align_munmap+0x2ba/0x11f0 [ 170.520683] ? lock_is_held_type+0x9f/0x120 [ 170.521225] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 170.521832] ? mtree_range_walk+0x632/0x900 [ 170.522384] ? mas_walk+0x5c7/0x7c0 [ 170.522877] do_vmi_munmap+0x1f1/0x2b0 [ 170.523378] mmap_region+0x1f9/0x2660 [ 170.523864] ? mark_held_locks+0x9e/0xe0 [ 170.524380] ? lockdep_hardirqs_on_prepare+0x27b/0x3f0 [ 170.525020] ? asm_common_interrupt+0x26/0x40 [ 170.525603] ? __pfx_mmap_region+0x10/0x10 [ 170.526137] ? asm_common_interrupt+0x26/0x40 [ 170.526731] ? do_mmap+0xcaa/0xf00 [ 170.527192] do_mmap+0x854/0xf00 [ 170.527634] vm_mmap_pgoff+0x1a6/0x3a0 [ 170.528137] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 170.528700] ksys_mmap_pgoff+0x3af/0x500 [ 170.529220] do_syscall_64+0x3f/0x90 [ 170.529703] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 170.530360] RIP: 0033:0x7fb7117bbd82 [ 170.530842] 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 [ 170.532956] RSP: 002b:00007ffec59aa508 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 170.533856] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb7117bbd82 [ 170.534716] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb710bf5000 [ 170.535566] RBP: 00007fb710bf5000 R08: 0000000000000009 R09: 0000000000001000 [ 170.536416] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556c203e0ec0 [ 170.537283] R13: 00007ffec59aa520 R14: 00007ffec59aa550 R15: 00007ffec59aa8b0 [ 170.538140] [ 170.538437] [ 170.538671] Allocated by task 214: [ 170.539102] kasan_save_stack+0x22/0x50 [ 170.539611] kasan_set_track+0x25/0x30 [ 170.540120] __kasan_slab_alloc+0x59/0x70 [ 170.540646] kmem_cache_alloc+0x16b/0x370 [ 170.541160] vm_area_dup+0x20/0x160 [ 170.541618] __split_vma+0x170/0x950 [ 170.542083] split_vma+0xc6/0x110 [ 170.542521] mprotect_fixup+0x8d2/0xb30 [ 170.543053] do_mprotect_pkey+0x87e/0xd40 [ 170.543583] __x64_sys_mprotect+0x78/0xc0 [ 170.544103] do_syscall_64+0x3f/0x90 [ 170.544588] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 170.545231] [ 170.545450] Freed by task 214: [ 170.545846] kasan_save_stack+0x22/0x50 [ 170.546352] kasan_set_track+0x25/0x30 [ 170.546860] kasan_save_free_info+0x2b/0x50 [ 170.547397] __kasan_slab_free+0x10a/0x190 [ 170.547930] kmem_cache_free+0x10d/0x4d0 [ 170.548447] rcu_core+0x8c8/0x2860 [ 170.548897] __do_softirq+0x1b7/0x7d4 [ 170.549408] [ 170.549634] Last potentially related work creation: [ 170.550223] kasan_save_stack+0x22/0x50 [ 170.550747] __kasan_record_aux_stack+0x8e/0xa0 [ 170.551323] __call_rcu_common.constprop.0+0x6a/0xb90 [ 170.551973] remove_vma+0x139/0x170 [ 170.552428] do_vmi_align_munmap+0xd4a/0x11f0 [ 170.552992] do_vmi_munmap+0x1f1/0x2b0 [ 170.553476] __vm_munmap+0x138/0x3a0 [ 170.553953] __x64_sys_munmap+0x59/0x80 [ 170.554461] do_syscall_64+0x3f/0x90 [ 170.554959] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 170.555601] [ 170.555818] The buggy address belongs to the object at ffff888019bebcb0 [ 170.555818] which belongs to the cache vm_area_struct of size 168 [ 170.557309] The buggy address is located 88 bytes inside of [ 170.557309] freed 168-byte region [ffff888019bebcb0, ffff888019bebd58) [ 170.558771] [ 170.558988] The buggy address belongs to the physical page: [ 170.559654] page:000000006eec6dd6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19beb [ 170.560805] memcg:ffff88800d96ab01 [ 170.561231] flags: 0x100000000000200(slab|node=0|zone=1) [ 170.561886] page_type: 0xffffffff() [ 170.562344] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 170.563290] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d96ab01 [ 170.564193] page dumped because: kasan: bad access detected [ 170.564861] [ 170.565082] Memory state around the buggy address: [ 170.565658] ffff888019bebc00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 170.566518] ffff888019bebc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 170.567392] >ffff888019bebd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 170.568258] ^ [ 170.568705] ffff888019bebd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 170.569567] ffff888019bebe00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 170.570421] ================================================================== [ 170.571557] Disabling lock debugging due to kernel taint [ 172.306154] BUG: Bad rss-counter state mm:00000000bab30196 type:MM_FILEPAGES val:33 [ 172.306807] BUG: Bad rss-counter state mm:00000000bab30196 type:MM_ANONPAGES val:22 [ 172.714526] BUG: Bad rss-counter state mm:00000000a0a284b1 type:MM_FILEPAGES val:33 [ 172.715631] BUG: Bad rss-counter state mm:00000000a0a284b1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:3725' (ECDSA) to the list of known hosts. 2023/06/19 23:13:58 fuzzer started 2023/06/19 23:13:58 dialing manager at localhost:44161 2023/06/19 23:13:58 checking machine... 2023/06/19 23:13:58 checking revisions... [ 173.381905] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:13:59 testing simple program... [ 173.434800] cgroup: Unknown subsys name 'net' [ 173.486023] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:11:38 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=0000000000000001 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=0000555e43973fe0 CR3=000000000de34000 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=2038353a33313a3332203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038353a33313a3332203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=00007ffd770f7b90 RBX=0000000000000001 RCX=ffffffff864b9d56 RDX=0000000000000002 RSI=0000000000000000 RDI=ffff88801617ff78 RBP=ffff88801617ef5a RSP=ffff88801617eea8 R8 =ffffffff864b9d5a R9 =ffff88801617ef58 R10=0000000000038001 R11=00000000000b6996 R12=ffff88801617ff58 R13=ffff88801617ef60 R14=ffff88801617ff58 R15=ffff88801617ef18 RIP=ffffffff81131eec RFL=00000202 [-------] 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 00007f723aefb900 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=00007f723aec5008 CR3=000000000ea54000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000