syzkaller login: [ 31.811589] BUG: Bad rss-counter state mm:000000003ddbe20a type:MM_FILEPAGES val:33 [ 31.812817] BUG: Bad rss-counter state mm:000000003ddbe20a type:MM_ANONPAGES val:22 [ 31.851342] ================================================================== [ 31.852390] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.853436] Read of size 8 at addr ffff888016cf5df0 by task sshd/220 [ 31.854204] [ 31.854420] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.855316] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.856281] Call Trace: [ 31.856608] [ 31.856893] dump_stack_lvl+0x91/0xf0 [ 31.857386] print_report+0xcc/0x620 [ 31.857871] ? __virt_addr_valid+0x102/0x340 [ 31.858432] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.859060] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.859669] kasan_report+0xbe/0xf0 [ 31.860144] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.860763] vma_interval_tree_remove+0xc75/0xec0 [ 31.861374] vma_prepare+0xc54/0x11a0 [ 31.861864] __split_vma+0x5af/0x950 [ 31.862338] ? __pfx___split_vma+0x10/0x10 [ 31.862877] ? find_held_lock+0x2c/0x110 [ 31.863404] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.863967] ? lock_is_held_type+0x9f/0x120 [ 31.864498] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.865105] ? mtree_range_walk+0x632/0x900 [ 31.865652] ? mas_walk+0x5c7/0x7c0 [ 31.866159] do_vmi_munmap+0x1f1/0x2b0 [ 31.866674] mmap_region+0x1f9/0x2660 [ 31.867184] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.867720] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.868488] ? __pfx_lock_acquire+0x10/0x10 [ 31.869077] ? __pfx_mmap_region+0x10/0x10 [ 31.869617] ? security_mmap_addr+0x7d/0xa0 [ 31.870151] ? get_unmapped_area+0x1f5/0x3f0 [ 31.870715] do_mmap+0x854/0xf00 [ 31.871154] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.871645] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.872245] ksys_mmap_pgoff+0x3af/0x500 [ 31.872757] do_syscall_64+0x3f/0x90 [ 31.873232] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.873886] RIP: 0033:0x7f56d8482d82 [ 31.874345] 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 [ 31.876536] RSP: 002b:00007ffd9a2f3ee8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.877463] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f56d8482d82 [ 31.878331] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f56d78bc000 [ 31.879185] RBP: 00007f56d78bc000 R08: 0000000000000009 R09: 0000000000001000 [ 31.880025] R10: 0000000000000812 R11: 0000000000000206 R12: 00005650dd1e0ec0 [ 31.880868] R13: 00007ffd9a2f3f00 R14: 00007ffd9a2f3f30 R15: 00007ffd9a2f4290 [ 31.881732] [ 31.882028] [ 31.882243] Allocated by task 213: [ 31.882679] kasan_save_stack+0x22/0x50 [ 31.883185] kasan_set_track+0x25/0x30 [ 31.883683] __kasan_slab_alloc+0x59/0x70 [ 31.884208] kmem_cache_alloc+0x16b/0x370 [ 31.884720] vm_area_dup+0x20/0x160 [ 31.885175] __split_vma+0x170/0x950 [ 31.885638] split_vma+0xc6/0x110 [ 31.886078] mprotect_fixup+0x8d2/0xb30 [ 31.886587] do_mprotect_pkey+0x87e/0xd40 [ 31.887124] __x64_sys_mprotect+0x78/0xc0 [ 31.887645] do_syscall_64+0x3f/0x90 [ 31.888115] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.888754] [ 31.888973] Freed by task 213: [ 31.889368] kasan_save_stack+0x22/0x50 [ 31.889879] kasan_set_track+0x25/0x30 [ 31.890367] kasan_save_free_info+0x2b/0x50 [ 31.890915] __kasan_slab_free+0x10a/0x190 [ 31.891449] kmem_cache_free+0x10d/0x4d0 [ 31.891961] rcu_core+0x8c8/0x2860 [ 31.892403] __do_softirq+0x1b7/0x7d4 [ 31.892875] [ 31.893091] Last potentially related work creation: [ 31.893678] kasan_save_stack+0x22/0x50 [ 31.894189] __kasan_record_aux_stack+0x8e/0xa0 [ 31.894783] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.895423] remove_vma+0x139/0x170 [ 31.895873] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.896425] do_vmi_munmap+0x1f1/0x2b0 [ 31.896915] __vm_munmap+0x138/0x3a0 [ 31.897378] __x64_sys_munmap+0x59/0x80 [ 31.897868] do_syscall_64+0x3f/0x90 [ 31.898340] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.898993] [ 31.899206] The buggy address belongs to the object at ffff888016cf5d98 [ 31.899206] which belongs to the cache vm_area_struct of size 168 [ 31.900667] The buggy address is located 88 bytes inside of [ 31.900667] freed 168-byte region [ffff888016cf5d98, ffff888016cf5e40) [ 31.902056] [ 31.902272] The buggy address belongs to the physical page: [ 31.902937] page:000000000d9ba8e9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16cf5 [ 31.904044] memcg:ffff88800ef05e01 [ 31.904470] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.905114] page_type: 0xffffffff() [ 31.905561] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.906474] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ef05e01 [ 31.907411] page dumped because: kasan: bad access detected [ 31.908080] [ 31.908296] Memory state around the buggy address: [ 31.908879] ffff888016cf5c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 31.909737] ffff888016cf5d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 31.910615] >ffff888016cf5d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.911491] ^ [ 31.912304] ffff888016cf5e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.913156] ffff888016cf5e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.914009] ================================================================== [ 31.915130] Disabling lock debugging due to kernel taint [ 34.291480] BUG: Bad rss-counter state mm:00000000d3f9771b type:MM_FILEPAGES val:33 [ 34.293082] BUG: Bad rss-counter state mm:00000000d3f9771b type:MM_ANONPAGES val:22 [ 34.838988] BUG: Bad rss-counter state mm:000000003628ca34 type:MM_FILEPAGES val:33 [ 34.840149] BUG: Bad rss-counter state mm:000000003628ca34 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:49524' (ECDSA) to the list of known hosts. 2023/06/19 21:44:28 fuzzer started 2023/06/19 21:44:29 dialing manager at localhost:44161 2023/06/19 21:44:29 checking machine... 2023/06/19 21:44:29 checking revisions... [ 35.517182] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:44:29 testing simple program... [ 35.568432] cgroup: Unknown subsys name 'net' [ 35.622590] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:44:27 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=0000000000000001 RDX=1ffff110028ffe49 RSI=ffffffff846000aa RDI=ffff8880147ff208 RBP=ffff8880147ff260 RSP=ffff8880147ff198 R8 =0000000000000001 R9 =ffff8880147ff248 R10=0000000000038001 R11=00000000000b4fb9 R12=ffff8880147ff268 R13=ffff8880147ff250 R14=ffff8880147ff249 R15=ffff8880147ff208 RIP=ffffffff811306da 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 00007ff442109900 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=00007f80257b6650 CR3=000000000d86e000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=0fda4bd1c29e546200000000000ae988 XMM05=f1e54659df0a517b0000000000135480 XMM06=c291bd5c70af25b90000000000134270 XMM07=fb795ef6d65770560000000000124878 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000002 RBX=ffff8880163f78d8 RCX=ffffffff860d6801 RDX=0000000000000000 RSI=ffffffff81846014 RDI=ffff8880163f78e4 RBP=0000000000000000 RSP=ffff8880163f77f0 R8 =ffffffff860d68fa R9 =ffff8880163f7850 R10=0000000000038001 R11=0000000000010b7e R12=ffff8880163f78d8 R13=0000000000000000 R14=ffff88800e0a51c0 R15=ffff88801679f390 RIP=ffffffff813ad514 RFL=00000202 [-------] 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 00007f8025201900 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=00007f80257b8618 CR3=000000000e63a000 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