syzkaller login: [ 30.481670] BUG: Bad rss-counter state mm:00000000ecc40f17 type:MM_FILEPAGES val:33 [ 30.482531] BUG: Bad rss-counter state mm:00000000ecc40f17 type:MM_ANONPAGES val:22 [ 30.601709] ================================================================== [ 30.602356] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.602947] Read of size 8 at addr ffff88800d907140 by task sshd/220 [ 30.603504] [ 30.603643] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.604190] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.604810] Call Trace: [ 30.605009] [ 30.605185] dump_stack_lvl+0x91/0xf0 [ 30.605494] print_report+0xcc/0x620 [ 30.605796] ? __virt_addr_valid+0x102/0x340 [ 30.606346] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.606712] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.607107] kasan_report+0xbe/0xf0 [ 30.607386] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.607748] vma_interval_tree_remove+0xc75/0xec0 [ 30.608096] vma_prepare+0xc54/0x11a0 [ 30.608399] __split_vma+0x5af/0x950 [ 30.608672] ? __pfx___split_vma+0x10/0x10 [ 30.608979] ? find_held_lock+0x2c/0x110 [ 30.609285] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.609617] ? lock_is_held_type+0x9f/0x120 [ 30.609936] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.610291] ? mtree_range_walk+0x632/0x900 [ 30.610630] ? mas_walk+0x5c7/0x7c0 [ 30.610907] do_vmi_munmap+0x1f1/0x2b0 [ 30.611247] mmap_region+0x1f9/0x2660 [ 30.611527] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.611824] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.612239] ? __pfx_lock_acquire+0x10/0x10 [ 30.612549] ? __pfx_mmap_region+0x10/0x10 [ 30.612857] ? security_mmap_addr+0x7d/0xa0 [ 30.613166] ? get_unmapped_area+0x1f5/0x3f0 [ 30.613502] do_mmap+0x854/0xf00 [ 30.613763] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.614053] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.614380] ksys_mmap_pgoff+0x3af/0x500 [ 30.614677] do_syscall_64+0x3f/0x90 [ 30.614962] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.615376] RIP: 0033:0x7efdd44fed82 [ 30.615650] 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 [ 30.616890] RSP: 002b:00007ffdff0df388 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.617426] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007efdd44fed82 [ 30.617918] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007efdd3938000 [ 30.618424] RBP: 00007efdd3938000 R08: 0000000000000009 R09: 0000000000001000 [ 30.618920] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560507552d90 [ 30.619446] R13: 00007ffdff0df3a0 R14: 00007ffdff0df3d0 R15: 00007ffdff0df730 [ 30.619966] [ 30.620142] [ 30.620278] Allocated by task 213: [ 30.620532] kasan_save_stack+0x22/0x50 [ 30.620831] kasan_set_track+0x25/0x30 [ 30.621125] __kasan_slab_alloc+0x59/0x70 [ 30.621441] kmem_cache_alloc+0x16b/0x370 [ 30.621749] vm_area_dup+0x20/0x160 [ 30.622039] __split_vma+0x170/0x950 [ 30.622317] split_vma+0xc6/0x110 [ 30.622582] mprotect_fixup+0x8d2/0xb30 [ 30.622882] do_mprotect_pkey+0x87e/0xd40 [ 30.623223] __x64_sys_mprotect+0x78/0xc0 [ 30.623532] do_syscall_64+0x3f/0x90 [ 30.623825] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.624214] [ 30.624345] Freed by task 213: [ 30.624573] kasan_save_stack+0x22/0x50 [ 30.624869] kasan_set_track+0x25/0x30 [ 30.625154] kasan_save_free_info+0x2b/0x50 [ 30.625464] __kasan_slab_free+0x10a/0x190 [ 30.625771] kmem_cache_free+0x10d/0x4d0 [ 30.626068] rcu_core+0x8c8/0x2860 [ 30.626327] __do_softirq+0x1b7/0x7d4 [ 30.626608] [ 30.626739] Last potentially related work creation: [ 30.627119] kasan_save_stack+0x22/0x50 [ 30.627432] __kasan_record_aux_stack+0x8e/0xa0 [ 30.627776] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.628178] remove_vma+0x139/0x170 [ 30.628464] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.628823] do_vmi_munmap+0x1f1/0x2b0 [ 30.629118] __vm_munmap+0x138/0x3a0 [ 30.629410] __x64_sys_munmap+0x59/0x80 [ 30.629728] do_syscall_64+0x3f/0x90 [ 30.630044] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.630474] [ 30.630612] The buggy address belongs to the object at ffff88800d9070e8 [ 30.630612] which belongs to the cache vm_area_struct of size 168 [ 30.631533] The buggy address is located 88 bytes inside of [ 30.631533] freed 168-byte region [ffff88800d9070e8, ffff88800d907190) [ 30.632381] [ 30.632513] The buggy address belongs to the physical page: [ 30.632913] page:000000007128ab08 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd907 [ 30.633592] memcg:ffff888019644301 [ 30.633857] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.634263] page_type: 0xffffffff() [ 30.634545] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.635150] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019644301 [ 30.635713] page dumped because: kasan: bad access detected [ 30.636136] [ 30.636277] Memory state around the buggy address: [ 30.636635] ffff88800d907000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.637169] ffff88800d907080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 30.637719] >ffff88800d907100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.638249] ^ [ 30.638646] ffff88800d907180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.639212] ffff88800d907200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.639733] ================================================================== [ 30.640420] Disabling lock debugging due to kernel taint [ 32.425293] BUG: Bad rss-counter state mm:0000000054d4f11e type:MM_FILEPAGES val:33 [ 32.426057] BUG: Bad rss-counter state mm:0000000054d4f11e type:MM_ANONPAGES val:22 [ 32.800123] BUG: Bad rss-counter state mm:000000009c710d73 type:MM_FILEPAGES val:33 [ 32.800963] BUG: Bad rss-counter state mm:000000009c710d73 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:42636' (ECDSA) to the list of known hosts. 2023/06/21 09:45:59 fuzzer started 2023/06/21 09:46:00 dialing manager at localhost:36067 2023/06/21 09:46:00 checking machine... 2023/06/21 09:46:00 checking revisions... [ 33.402705] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:46:00 testing simple program... [ 33.447675] cgroup: Unknown subsys name 'net' [ 33.494727] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:45:59 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007fff84d402d8 CR3=000000000f4b0000 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=2039353a35343a3930203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039353a35343a3930203132 XMM08=20303d64696720303d64697520612f6e XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=0000000000000000 RDX=0000000000000018 RSI=0000000000000008 RDI=ffffffff8562be48 RBP=1ffff1100d9e1387 RSP=ffff88806cf09c28 R8 =ffffffff85497f20 R9 =ffffffffffffffff R10=ffffffffffffffff R11=000000165746bde0 R12=ffffffff8562be48 R13=ffffffff813cb3a1 R14=ffffffff85497f20 R15=0000000000000000 RIP=ffffffff812d86dd RFL=00000056 [---ZAP-] 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 00007f17a63b9900 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=00007ffc23f58000 CR3=000000000ca82000 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=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