syzkaller login: [ 30.719924] BUG: Bad rss-counter state mm:00000000d39bc0fb type:MM_FILEPAGES val:33 [ 30.721343] BUG: Bad rss-counter state mm:00000000d39bc0fb type:MM_ANONPAGES val:22 [ 30.866634] ================================================================== [ 30.867549] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.868483] Read of size 8 at addr ffff88800c546a50 by task sshd/220 [ 30.869258] [ 30.869568] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.870459] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.871428] Call Trace: [ 30.871768] [ 30.872055] dump_stack_lvl+0x91/0xf0 [ 30.872538] print_report+0xcc/0x620 [ 30.873029] ? __virt_addr_valid+0x102/0x340 [ 30.873581] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.874248] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.874890] kasan_report+0xbe/0xf0 [ 30.875373] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.875987] vma_interval_tree_remove+0xc75/0xec0 [ 30.876601] vma_prepare+0xc54/0x11a0 [ 30.877088] __split_vma+0x5af/0x950 [ 30.877567] ? __pfx___split_vma+0x10/0x10 [ 30.878121] ? find_held_lock+0x2c/0x110 [ 30.878652] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.879217] ? lock_is_held_type+0x9f/0x120 [ 30.879774] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.880403] ? mtree_range_walk+0x632/0x900 [ 30.880974] ? mas_walk+0x5c7/0x7c0 [ 30.881465] do_vmi_munmap+0x1f1/0x2b0 [ 30.881993] mmap_region+0x1f9/0x2660 [ 30.882495] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.883029] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.883770] ? __pfx_lock_acquire+0x10/0x10 [ 30.884322] ? __pfx_mmap_region+0x10/0x10 [ 30.884868] ? security_mmap_addr+0x7d/0xa0 [ 30.885419] ? get_unmapped_area+0x1f5/0x3f0 [ 30.885999] do_mmap+0x854/0xf00 [ 30.886451] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.886967] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.887554] ksys_mmap_pgoff+0x3af/0x500 [ 30.888079] do_syscall_64+0x3f/0x90 [ 30.888579] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.889248] RIP: 0033:0x7f9a5cff9d82 [ 30.889720] 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 [ 30.891929] RSP: 002b:00007ffd8d7cf178 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.892873] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9a5cff9d82 [ 30.893753] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9a5c433000 [ 30.894675] RBP: 00007f9a5c433000 R08: 0000000000000009 R09: 0000000000001000 [ 30.895557] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558442143ec0 [ 30.896439] R13: 00007ffd8d7cf190 R14: 00007ffd8d7cf1c0 R15: 00007ffd8d7cf520 [ 30.897331] [ 30.897636] [ 30.897857] Allocated by task 213: [ 30.898315] kasan_save_stack+0x22/0x50 [ 30.898837] kasan_set_track+0x25/0x30 [ 30.899351] __kasan_slab_alloc+0x59/0x70 [ 30.899897] kmem_cache_alloc+0x16b/0x370 [ 30.900435] vm_area_dup+0x20/0x160 [ 30.900911] __split_vma+0x170/0x950 [ 30.901412] split_vma+0xc6/0x110 [ 30.901868] mprotect_fixup+0x8d2/0xb30 [ 30.902418] do_mprotect_pkey+0x87e/0xd40 [ 30.902954] __x64_sys_mprotect+0x78/0xc0 [ 30.903506] do_syscall_64+0x3f/0x90 [ 30.904002] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.904672] [ 30.904893] Freed by task 213: [ 30.905296] kasan_save_stack+0x22/0x50 [ 30.905823] kasan_set_track+0x25/0x30 [ 30.906351] kasan_save_free_info+0x2b/0x50 [ 30.906904] __kasan_slab_free+0x10a/0x190 [ 30.907468] kmem_cache_free+0x10d/0x4d0 [ 30.908018] rcu_core+0x8c8/0x2860 [ 30.908475] __do_softirq+0x1b7/0x7d4 [ 30.908985] [ 30.909210] Last potentially related work creation: [ 30.909821] kasan_save_stack+0x22/0x50 [ 30.910336] __kasan_record_aux_stack+0x8e/0xa0 [ 30.910906] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.911546] remove_vma+0x139/0x170 [ 30.911996] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.912551] do_vmi_munmap+0x1f1/0x2b0 [ 30.913034] __vm_munmap+0x138/0x3a0 [ 30.913499] __x64_sys_munmap+0x59/0x80 [ 30.914034] do_syscall_64+0x3f/0x90 [ 30.914516] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.915185] [ 30.915410] The buggy address belongs to the object at ffff88800c5469f8 [ 30.915410] which belongs to the cache vm_area_struct of size 168 [ 30.916961] The buggy address is located 88 bytes inside of [ 30.916961] freed 168-byte region [ffff88800c5469f8, ffff88800c546aa0) [ 30.918442] [ 30.918673] The buggy address belongs to the physical page: [ 30.919363] page:000000004d1c7810 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc546 [ 30.920514] memcg:ffff88800e5b2001 [ 30.920960] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.921687] page_type: 0xffffffff() [ 30.922179] raw: 0100000000000200 ffff8880087a0c80 ffffea00003b73c0 dead000000000003 [ 30.923133] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e5b2001 [ 30.924060] page dumped because: kasan: bad access detected [ 30.924758] [ 30.924975] Memory state around the buggy address: [ 30.925561] ffff88800c546900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.926442] ffff88800c546980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 30.927308] >ffff88800c546a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.928184] ^ [ 30.928904] ffff88800c546a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 30.929781] ffff88800c546b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.930675] ================================================================== [ 30.931727] Disabling lock debugging due to kernel taint [ 33.188258] BUG: Bad rss-counter state mm:00000000d9f3d2f6 type:MM_FILEPAGES val:33 [ 33.189433] BUG: Bad rss-counter state mm:00000000d9f3d2f6 type:MM_ANONPAGES val:22 [ 33.559744] BUG: Bad rss-counter state mm:0000000036c056ed type:MM_FILEPAGES val:33 [ 33.560534] BUG: Bad rss-counter state mm:0000000036c056ed type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:59076' (ECDSA) to the list of known hosts. 2023/06/20 12:02:55 fuzzer started 2023/06/20 12:02:55 dialing manager at localhost:36067 2023/06/20 12:02:55 checking machine... 2023/06/20 12:02:55 checking revisions... [ 34.314881] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:02:55 testing simple program... [ 34.347783] cgroup: Unknown subsys name 'net' [ 34.400552] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:02:55 Registers: info registers vcpu 0 RAX=000000000000ba8f RBX=0000000000000001 RCX=ffffffff81288ac4 RDX=0000000000000009 RSI=ffffffff860b9c62 RDI=ffffffff85da9400 RBP=ffff88806ce09af0 RSP=ffff88806ce09a18 R8 =ffffffff860b9c62 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=000000000000ba8f R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88806ce09ad9 R15=ffff88806ce09a98 RIP=ffffffff8112fc12 RFL=00000216 [----AP-] 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=00007ff1917ef790 CR3=000000000f68a000 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=2035353a32303a3231203032206e754a XMM01=657463656e6e6f63736944203a5d3033 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3033325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035353a32303a3231203032 XMM08=79732f646d65747379732f62696c2f22 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=000000000008b38e RBX=0000000000000001 RCX=ffffffff8366228f RDX=0000000000000009 RSI=ffffffff863b725c RDI=ffffffff85fa77fc RBP=ffff88800c777468 RSP=ffff88800c777390 R8 =ffffffff863b725c R9 =ffff88800c777450 R10=0000000000038001 R11=000000000008b38e R12=ffff88800c777470 R13=ffff88800c777458 R14=ffff88800c777451 R15=ffff88800c777410 RIP=ffffffff8112fc12 RFL=00000216 [----AP-] 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 00007ff1913bf900 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=00007ff191976618 CR3=000000000f658000 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=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