syzkaller login: [ 30.491692] BUG: Bad rss-counter state mm:000000003add6722 type:MM_FILEPAGES val:33 [ 30.492529] BUG: Bad rss-counter state mm:000000003add6722 type:MM_ANONPAGES val:22 [ 30.675585] ================================================================== [ 30.676290] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.677013] Read of size 8 at addr ffff88801a34a140 by task sshd/223 [ 30.677605] [ 30.677779] CPU: 0 PID: 223 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.678441] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.679195] Call Trace: [ 30.679439] <TASK> [ 30.679665] dump_stack_lvl+0x91/0xf0 [ 30.680126] print_report+0xcc/0x620 [ 30.680495] ? __virt_addr_valid+0x102/0x340 [ 30.680919] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.681390] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.681871] kasan_report+0xbe/0xf0 [ 30.682259] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.682737] vma_interval_tree_remove+0xc75/0xec0 [ 30.683200] vma_prepare+0xc54/0x11a0 [ 30.683567] __split_vma+0x5af/0x950 [ 30.683925] ? __pfx___split_vma+0x10/0x10 [ 30.684330] ? find_held_lock+0x2c/0x110 [ 30.684730] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.685162] ? lock_is_held_type+0x9f/0x120 [ 30.685573] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.686041] ? mtree_range_walk+0x632/0x900 [ 30.686457] ? mas_walk+0x5c7/0x7c0 [ 30.686816] do_vmi_munmap+0x1f1/0x2b0 [ 30.687196] mmap_region+0x1f9/0x2660 [ 30.687564] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.687952] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.688503] ? __pfx_lock_acquire+0x10/0x10 [ 30.688912] ? __pfx_mmap_region+0x10/0x10 [ 30.689312] ? security_mmap_addr+0x7d/0xa0 [ 30.689711] ? get_unmapped_area+0x1f5/0x3f0 [ 30.690144] do_mmap+0x854/0xf00 [ 30.690475] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.690848] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.691274] ksys_mmap_pgoff+0x3af/0x500 [ 30.691660] do_syscall_64+0x3f/0x90 [ 30.692026] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.692516] RIP: 0033:0x7f56132bad82 [ 30.692866] 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 [ 30.694499] RSP: 002b:00007ffedbc23d88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.695191] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f56132bad82 [ 30.695831] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f56126f4000 [ 30.696477] RBP: 00007f56126f4000 R08: 0000000000000009 R09: 0000000000001000 [ 30.697122] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ff0f04fb20 [ 30.697772] R13: 00007ffedbc23da0 R14: 00007ffedbc23dd0 R15: 00007ffedbc24130 [ 30.698423] </TASK> [ 30.698645] [ 30.698809] Allocated by task 213: [ 30.699138] kasan_save_stack+0x22/0x50 [ 30.699520] kasan_set_track+0x25/0x30 [ 30.699893] __kasan_slab_alloc+0x59/0x70 [ 30.700290] kmem_cache_alloc+0x16b/0x370 [ 30.700679] vm_area_dup+0x20/0x160 [ 30.701023] __split_vma+0x170/0x950 [ 30.701373] split_vma+0xc6/0x110 [ 30.701705] mprotect_fixup+0x8d2/0xb30 [ 30.702106] do_mprotect_pkey+0x87e/0xd40 [ 30.702502] __x64_sys_mprotect+0x78/0xc0 [ 30.702898] do_syscall_64+0x3f/0x90 [ 30.703263] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.703752] [ 30.703914] Freed by task 19: [ 30.704205] kasan_save_stack+0x22/0x50 [ 30.704590] kasan_set_track+0x25/0x30 [ 30.704961] kasan_save_free_info+0x2b/0x50 [ 30.705365] __kasan_slab_free+0x10a/0x190 [ 30.705776] kmem_cache_free+0x10d/0x4d0 [ 30.706161] rcu_core+0x8c8/0x2860 [ 30.706498] __do_softirq+0x1b7/0x7d4 [ 30.706855] [ 30.707020] Last potentially related work creation: [ 30.707471] kasan_save_stack+0x22/0x50 [ 30.707851] __kasan_record_aux_stack+0x8e/0xa0 [ 30.708285] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.708771] remove_vma+0x139/0x170 [ 30.709114] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.709535] do_vmi_munmap+0x1f1/0x2b0 [ 30.709908] __vm_munmap+0x138/0x3a0 [ 30.710270] __x64_sys_munmap+0x59/0x80 [ 30.710647] do_syscall_64+0x3f/0x90 [ 30.711005] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.711492] [ 30.711657] The buggy address belongs to the object at ffff88801a34a0e8 [ 30.711657] which belongs to the cache vm_area_struct of size 168 [ 30.712772] The buggy address is located 88 bytes inside of [ 30.712772] freed 168-byte region [ffff88801a34a0e8, ffff88801a34a190) [ 30.713853] [ 30.714019] The buggy address belongs to the physical page: [ 30.714517] page:00000000edfb6167 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a34a [ 30.715348] memcg:ffff888018f2d901 [ 30.715673] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.716165] page_type: 0xffffffff() [ 30.716508] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 30.717208] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018f2d901 [ 30.717900] page dumped because: kasan: bad access detected [ 30.718403] [ 30.718568] Memory state around the buggy address: [ 30.719012] ffff88801a34a000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.719658] ffff88801a34a080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 30.720308] >ffff88801a34a100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.720957] ^ [ 30.721438] ffff88801a34a180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.722104] ffff88801a34a200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.722753] ================================================================== [ 30.723565] Disabling lock debugging due to kernel taint [ 32.215265] BUG: Bad rss-counter state mm:000000002308b51f type:MM_FILEPAGES val:33 [ 32.216028] BUG: Bad rss-counter state mm:000000002308b51f type:MM_ANONPAGES val:22 [ 32.623212] BUG: Bad rss-counter state mm:00000000528e397f type:MM_FILEPAGES val:33 [ 32.623972] BUG: Bad rss-counter state mm:00000000528e397f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:37120' (ECDSA) to the list of known hosts. 2023/06/19 12:16:24 fuzzer started 2023/06/19 12:16:24 dialing manager at localhost:44161 2023/06/19 12:16:24 checking machine... 2023/06/19 12:16:24 checking revisions... [ 33.278352] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:16:24 testing simple program... [ 33.313970] cgroup: Unknown subsys name 'net' [ 33.356997] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:16:23 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=00007fc9c51eb038 CR3=000000000e35a000 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=2034323a36313a3231203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033323a36313a3231203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0c9531c RBX=0000000000000001 RCX=ffffffff864a98e0 RDX=0000000000000000 RSI=dffffc0000000000 RDI=ffffffff864a98e2 RBP=ffff88806cf09ac8 RSP=ffff88806cf09a00 R8 =ffffffff864a98e4 R9 =ffff88806cf09ab0 R10=0000000000038001 R11=00000000000b3e2e R12=ffff88806cf09ad0 R13=ffff88806cf09ab8 R14=ffff8880168476d0 R15=ffff88806cf09a70 RIP=ffffffff811311c7 RFL=00000212 [----A--] 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 00007fc10c6e7900 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=00007fc10c6b1008 CR3=000000001a130000 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