syzkaller login: [ 30.407454] BUG: Bad rss-counter state mm:000000003404e202 type:MM_FILEPAGES val:33 [ 30.408450] BUG: Bad rss-counter state mm:000000003404e202 type:MM_ANONPAGES val:22 [ 30.579587] ================================================================== [ 30.580658] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.581755] Read of size 8 at addr ffff888018297310 by task sshd/221 [ 30.582799] [ 30.583060] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.584087] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.585163] Call Trace: [ 30.585490] [ 30.585773] dump_stack_lvl+0x91/0xf0 [ 30.586277] print_report+0xcc/0x620 [ 30.586765] ? __virt_addr_valid+0x102/0x340 [ 30.587319] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.587940] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.588553] kasan_report+0xbe/0xf0 [ 30.589032] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.589654] vma_interval_tree_remove+0xc75/0xec0 [ 30.590265] vma_prepare+0xc54/0x11a0 [ 30.590742] __split_vma+0x5af/0x950 [ 30.591212] ? __pfx___split_vma+0x10/0x10 [ 30.591741] ? find_held_lock+0x2c/0x110 [ 30.592260] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.592819] ? lock_is_held_type+0x9f/0x120 [ 30.593356] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.593974] ? mtree_range_walk+0x632/0x900 [ 30.594520] ? mas_walk+0x5c7/0x7c0 [ 30.594996] do_vmi_munmap+0x1f1/0x2b0 [ 30.595483] mmap_region+0x1f9/0x2660 [ 30.595962] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.596468] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.597191] ? __pfx_lock_acquire+0x10/0x10 [ 30.597718] ? __pfx_mmap_region+0x10/0x10 [ 30.598250] ? security_mmap_addr+0x7d/0xa0 [ 30.598779] ? get_unmapped_area+0x1f5/0x3f0 [ 30.599325] do_mmap+0x854/0xf00 [ 30.599761] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.600256] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.600812] ksys_mmap_pgoff+0x3af/0x500 [ 30.601323] do_syscall_64+0x3f/0x90 [ 30.601802] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.602473] RIP: 0033:0x7f7575b34d82 [ 30.602931] 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 [ 30.605062] RSP: 002b:00007ffe24cdab38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.605964] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7575b34d82 [ 30.606814] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7574f6e000 [ 30.607656] RBP: 00007f7574f6e000 R08: 0000000000000009 R09: 0000000000001000 [ 30.608491] R10: 0000000000000812 R11: 0000000000000206 R12: 000055dca83a8980 [ 30.609325] R13: 00007ffe24cdab50 R14: 00007ffe24cdab80 R15: 00007ffe24cdaee0 [ 30.610180] [ 30.610469] [ 30.610683] Allocated by task 213: [ 30.611105] kasan_save_stack+0x22/0x50 [ 30.611602] kasan_set_track+0x25/0x30 [ 30.612092] __kasan_slab_alloc+0x59/0x70 [ 30.612613] kmem_cache_alloc+0x16b/0x370 [ 30.613123] vm_area_dup+0x20/0x160 [ 30.613574] __split_vma+0x170/0x950 [ 30.614053] split_vma+0xc6/0x110 [ 30.614494] mprotect_fixup+0x8d2/0xb30 [ 30.614997] do_mprotect_pkey+0x87e/0xd40 [ 30.615513] __x64_sys_mprotect+0x78/0xc0 [ 30.616037] do_syscall_64+0x3f/0x90 [ 30.616506] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.617147] [ 30.617363] Freed by task 13: [ 30.617744] kasan_save_stack+0x22/0x50 [ 30.618246] kasan_set_track+0x25/0x30 [ 30.618738] kasan_save_free_info+0x2b/0x50 [ 30.619268] __kasan_slab_free+0x10a/0x190 [ 30.619796] kmem_cache_free+0x10d/0x4d0 [ 30.620302] rcu_core+0x8c8/0x2860 [ 30.620745] __do_softirq+0x1b7/0x7d4 [ 30.621224] [ 30.621438] Last potentially related work creation: [ 30.622026] kasan_save_stack+0x22/0x50 [ 30.622523] __kasan_record_aux_stack+0x8e/0xa0 [ 30.623088] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.623786] remove_vma+0x139/0x170 [ 30.624236] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.624791] do_vmi_munmap+0x1f1/0x2b0 [ 30.625270] __vm_munmap+0x138/0x3a0 [ 30.625732] __x64_sys_munmap+0x59/0x80 [ 30.626234] do_syscall_64+0x3f/0x90 [ 30.626704] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.627340] [ 30.627553] The buggy address belongs to the object at ffff8880182972b8 [ 30.627553] which belongs to the cache vm_area_struct of size 168 [ 30.629014] The buggy address is located 88 bytes inside of [ 30.629014] freed 168-byte region [ffff8880182972b8, ffff888018297360) [ 30.630420] [ 30.630634] The buggy address belongs to the physical page: [ 30.631285] page:00000000f9adcd60 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18297 [ 30.632372] memcg:ffff88801a20a301 [ 30.632797] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.633438] page_type: 0xffffffff() [ 30.633905] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.634823] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a20a301 [ 30.635717] page dumped because: kasan: bad access detected [ 30.636381] [ 30.636596] Memory state around the buggy address: [ 30.637173] ffff888018297200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 30.638036] ffff888018297280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.638882] >ffff888018297300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.639732] ^ [ 30.640195] ffff888018297380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.641042] ffff888018297400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.641901] ================================================================== [ 30.642797] Disabling lock debugging due to kernel taint [ 32.584762] BUG: Bad rss-counter state mm:000000005994d1d6 type:MM_FILEPAGES val:33 [ 32.585907] BUG: Bad rss-counter state mm:000000005994d1d6 type:MM_ANONPAGES val:22 [ 33.029008] BUG: Bad rss-counter state mm:000000007912595f type:MM_FILEPAGES val:33 [ 33.029702] BUG: Bad rss-counter state mm:000000007912595f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61043' (ECDSA) to the list of known hosts. 2023/06/21 04:09:41 fuzzer started 2023/06/21 04:09:41 dialing manager at localhost:36067 2023/06/21 04:09:41 checking machine... 2023/06/21 04:09:41 checking revisions... [ 33.723038] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:09:41 testing simple program... [ 33.765605] cgroup: Unknown subsys name 'net' [ 33.819798] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:09:41 Registers: info registers vcpu 0 RAX=ffffffff8542a6c0 RBX=ffffffff813ad470 RCX=ffff88806ce09b30 RDX=0000000000000000 RSI=ffffffff8542a6c0 RDI=ffff88806ce09a98 RBP=ffff88806ce09b30 RSP=ffff88806ce09a90 R8 =0000000000000130 R9 =0000000000000000 R10=ffffed1001eed930 R11=0000000000000000 R12=ffff88806ce09b60 R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff88800f76ca00 RIP=ffffffff81132a70 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 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=00007f4392db8018 CR3=000000000d7dc000 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=90bbf62d7c99408b5d4bf5b6be061d2e XMM02=000000000011d388ec2efd57dc4c00df XMM03=0000000000121b28db4635293473522d XMM04=68b6e3656452743a00000000000ae988 XMM05=1feea90c72a3d6900000000000131e80 XMM06=c291bd5c70af25b90000000000131878 XMM07=e042d86d42eb936e0000000000121da8 XMM08=db4635293473522d000000000011d3e8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffea00006d64c0 RCX=ffffffff817641e2 RDX=1ffffd40000dac99 RSI=0000000000000000 RDI=0000000000000000 RBP=ffffea00006d6488 RSP=ffff888016017bc0 R8 =0000000000000005 R9 =0000000000000001 R10=0000000000000001 R11=0000000000000000 R12=ffff8880159a80e8 R13=0000000000000000 R14=ffff88800ec0e550 R15=ffffea00006d64f4 RIP=ffffffff814c0438 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f8de1847900 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=00007f8de239b044 CR3=000000000d9b8000 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=00000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=313d6563636120322e322e202e30313d XMM07=672065736f6c635f6e6f69737365733a XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000