syzkaller login: [ 30.602910] BUG: Bad rss-counter state mm:0000000066c48867 type:MM_FILEPAGES val:33 [ 30.603901] BUG: Bad rss-counter state mm:0000000066c48867 type:MM_ANONPAGES val:22 [ 30.776442] ================================================================== [ 30.777410] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.778389] Read of size 8 at addr ffff888016ff4310 by task sshd/221 [ 30.779157] [ 30.779377] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.780349] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.781345] Call Trace: [ 30.781668] <TASK> [ 30.781971] dump_stack_lvl+0x91/0xf0 [ 30.782464] print_report+0xcc/0x620 [ 30.782950] ? __virt_addr_valid+0x102/0x340 [ 30.783500] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.784118] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.784734] kasan_report+0xbe/0xf0 [ 30.785237] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.785863] vma_interval_tree_remove+0xc75/0xec0 [ 30.786477] vma_prepare+0xc54/0x11a0 [ 30.786959] __split_vma+0x5af/0x950 [ 30.787444] ? __pfx___split_vma+0x10/0x10 [ 30.787980] ? find_held_lock+0x2c/0x110 [ 30.788507] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.789093] ? lock_is_held_type+0x9f/0x120 [ 30.789635] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.790245] ? mtree_range_walk+0x632/0x900 [ 30.790803] ? mas_walk+0x5c7/0x7c0 [ 30.791289] do_vmi_munmap+0x1f1/0x2b0 [ 30.791782] mmap_region+0x1f9/0x2660 [ 30.792263] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.792790] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.793523] ? __pfx_lock_acquire+0x10/0x10 [ 30.794063] ? __pfx_mmap_region+0x10/0x10 [ 30.794587] ? security_mmap_addr+0x7d/0xa0 [ 30.795134] ? get_unmapped_area+0x1f5/0x3f0 [ 30.795684] do_mmap+0x854/0xf00 [ 30.796123] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.796626] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.797224] ksys_mmap_pgoff+0x3af/0x500 [ 30.797725] do_syscall_64+0x3f/0x90 [ 30.798204] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.798855] RIP: 0033:0x7f1537bc4d82 [ 30.799310] 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 [ 30.801455] RSP: 002b:00007ffcb1093f88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.802373] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1537bc4d82 [ 30.803228] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1536ffe000 [ 30.804081] RBP: 00007f1536ffe000 R08: 0000000000000009 R09: 0000000000001000 [ 30.804936] R10: 0000000000000812 R11: 0000000000000206 R12: 00005603e9a1eec0 [ 30.805782] R13: 00007ffcb1093fa0 R14: 00007ffcb1093fd0 R15: 00007ffcb1094330 [ 30.806643] </TASK> [ 30.806938] [ 30.807153] Allocated by task 214: [ 30.807600] kasan_save_stack+0x22/0x50 [ 30.808103] kasan_set_track+0x25/0x30 [ 30.808595] __kasan_slab_alloc+0x59/0x70 [ 30.809137] kmem_cache_alloc+0x16b/0x370 [ 30.809652] vm_area_dup+0x20/0x160 [ 30.810111] __split_vma+0x170/0x950 [ 30.810587] split_vma+0xc6/0x110 [ 30.811042] mprotect_fixup+0x8d2/0xb30 [ 30.811548] do_mprotect_pkey+0x87e/0xd40 [ 30.812075] __x64_sys_mprotect+0x78/0xc0 [ 30.812602] do_syscall_64+0x3f/0x90 [ 30.813091] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.813738] [ 30.813958] Freed by task 214: [ 30.814349] kasan_save_stack+0x22/0x50 [ 30.814866] kasan_set_track+0x25/0x30 [ 30.815361] kasan_save_free_info+0x2b/0x50 [ 30.815892] __kasan_slab_free+0x10a/0x190 [ 30.816433] kmem_cache_free+0x10d/0x4d0 [ 30.816978] rcu_core+0x8c8/0x2860 [ 30.817429] __do_softirq+0x1b7/0x7d4 [ 30.817918] [ 30.818137] Last potentially related work creation: [ 30.818730] kasan_save_stack+0x22/0x50 [ 30.819230] __kasan_record_aux_stack+0x8e/0xa0 [ 30.819810] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.820452] remove_vma+0x139/0x170 [ 30.820911] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.821467] do_vmi_munmap+0x1f1/0x2b0 [ 30.821949] __vm_munmap+0x138/0x3a0 [ 30.822423] __x64_sys_munmap+0x59/0x80 [ 30.822931] do_syscall_64+0x3f/0x90 [ 30.823407] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.824050] [ 30.824265] The buggy address belongs to the object at ffff888016ff42b8 [ 30.824265] which belongs to the cache vm_area_struct of size 168 [ 30.825770] The buggy address is located 88 bytes inside of [ 30.825770] freed 168-byte region [ffff888016ff42b8, ffff888016ff4360) [ 30.827175] [ 30.827390] The buggy address belongs to the physical page: [ 30.828052] page:00000000f8c66496 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16ff4 [ 30.829153] memcg:ffff8880193d0b01 [ 30.829588] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.830246] page_type: 0xffffffff() [ 30.830718] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.831649] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880193d0b01 [ 30.832599] page dumped because: kasan: bad access detected [ 30.833274] [ 30.833488] Memory state around the buggy address: [ 30.834073] ffff888016ff4200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 30.834929] ffff888016ff4280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.835777] >ffff888016ff4300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.836629] ^ [ 30.837111] ffff888016ff4380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.837990] ffff888016ff4400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.838845] ================================================================== [ 30.840233] Disabling lock debugging due to kernel taint [ 32.656134] BUG: Bad rss-counter state mm:0000000095d2310f type:MM_FILEPAGES val:33 [ 32.657336] BUG: Bad rss-counter state mm:0000000095d2310f type:MM_ANONPAGES val:22 [ 33.086294] BUG: Bad rss-counter state mm:00000000a5c1e955 type:MM_FILEPAGES val:33 [ 33.087421] BUG: Bad rss-counter state mm:00000000a5c1e955 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:57361' (ECDSA) to the list of known hosts. 2023/06/20 17:10:23 fuzzer started 2023/06/20 17:10:23 dialing manager at localhost:36067 2023/06/20 17:10:23 checking machine... 2023/06/20 17:10:23 checking revisions... [ 33.847218] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:10:23 testing simple program... [ 33.885304] cgroup: Unknown subsys name 'net' [ 33.930922] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:10:23 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000010000 RCX=ffffffff813bcfd0 RDX=0000000000000000 RSI=0000000000010000 RDI=0000000000000000 RBP=0000000000000000 RSP=ffff88806ce09dd0 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=ffff88806ce09ff8 R12=fffffffffffffc0c R13=ffff88806ce2c240 R14=ffff88800ed77818 R15=dffffc0000000000 RIP=ffffffff814c0408 RFL=00000006 [-----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 00007fd031936900 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=00007fd031eed618 CR3=0000000016b2a000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007ffedca11cc8 CR3=0000000005482000 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=00007fbf2397a5100000559568848790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000