syzkaller login: [ 48.310290] BUG: Bad rss-counter state mm:00000000b989a4fc type:MM_FILEPAGES val:33 [ 48.311020] BUG: Bad rss-counter state mm:00000000b989a4fc type:MM_ANONPAGES val:22 [ 48.524412] ================================================================== [ 48.525025] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 48.525630] Read of size 8 at addr ffff88800df29a50 by task sshd/222 [ 48.526112] [ 48.526253] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 48.526799] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 48.527447] Call Trace: [ 48.527666] [ 48.527896] dump_stack_lvl+0x91/0xf0 [ 48.528239] print_report+0xcc/0x620 [ 48.528571] ? __virt_addr_valid+0x102/0x340 [ 48.528941] ? vma_interval_tree_remove+0xc75/0xec0 [ 48.529356] ? vma_interval_tree_remove+0xc75/0xec0 [ 48.529770] kasan_report+0xbe/0xf0 [ 48.530094] ? vma_interval_tree_remove+0xc75/0xec0 [ 48.530518] vma_interval_tree_remove+0xc75/0xec0 [ 48.530930] vma_prepare+0xc54/0x11a0 [ 48.531255] __split_vma+0x5af/0x950 [ 48.531574] ? __pfx___split_vma+0x10/0x10 [ 48.531956] ? find_held_lock+0x2c/0x110 [ 48.532318] do_vmi_align_munmap+0x2ba/0x11f0 [ 48.532691] ? lock_is_held_type+0x9f/0x120 [ 48.533048] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 48.533450] ? mtree_range_walk+0x632/0x900 [ 48.533817] ? mas_walk+0x5c7/0x7c0 [ 48.534134] do_vmi_munmap+0x1f1/0x2b0 [ 48.534463] mmap_region+0x1f9/0x2660 [ 48.534791] ? vm_mmap_pgoff+0x15c/0x3a0 [ 48.535143] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 48.535613] ? __pfx_lock_acquire+0x10/0x10 [ 48.536008] ? __pfx_mmap_region+0x10/0x10 [ 48.536359] ? security_mmap_addr+0x7d/0xa0 [ 48.536703] ? get_unmapped_area+0x1f5/0x3f0 [ 48.537058] do_mmap+0x854/0xf00 [ 48.537344] vm_mmap_pgoff+0x1a6/0x3a0 [ 48.537666] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 48.538029] ksys_mmap_pgoff+0x3af/0x500 [ 48.538366] do_syscall_64+0x3f/0x90 [ 48.538681] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 48.539106] RIP: 0033:0x7fbf8d3aed82 [ 48.539408] 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 [ 48.540822] RSP: 002b:00007fff4c159e68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 48.541414] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbf8d3aed82 [ 48.541948] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbf8c7e8000 [ 48.542499] RBP: 00007fbf8c7e8000 R08: 0000000000000009 R09: 0000000000001000 [ 48.543057] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cd478d0f70 [ 48.543617] R13: 00007fff4c159e80 R14: 00007fff4c159eb0 R15: 00007fff4c15a210 [ 48.548266] [ 48.548464] [ 48.548602] Allocated by task 213: [ 48.548876] kasan_save_stack+0x22/0x50 [ 48.549207] kasan_set_track+0x25/0x30 [ 48.549552] __kasan_slab_alloc+0x59/0x70 [ 48.549881] kmem_cache_alloc+0x16b/0x370 [ 48.550212] vm_area_dup+0x20/0x160 [ 48.550534] __split_vma+0x170/0x950 [ 48.550833] split_vma+0xc6/0x110 [ 48.551112] mprotect_fixup+0x8d2/0xb30 [ 48.551436] do_mprotect_pkey+0x87e/0xd40 [ 48.551767] __x64_sys_mprotect+0x78/0xc0 [ 48.552143] do_syscall_64+0x3f/0x90 [ 48.552448] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 48.552855] [ 48.552999] Freed by task 213: [ 48.553236] kasan_save_stack+0x22/0x50 [ 48.553547] kasan_set_track+0x25/0x30 [ 48.553849] kasan_save_free_info+0x2b/0x50 [ 48.554176] __kasan_slab_free+0x10a/0x190 [ 48.554523] kmem_cache_free+0x10d/0x4d0 [ 48.554847] rcu_core+0x8c8/0x2860 [ 48.555132] __do_softirq+0x1b7/0x7d4 [ 48.555438] [ 48.555578] Last potentially related work creation: [ 48.555987] kasan_save_stack+0x22/0x50 [ 48.556309] __kasan_record_aux_stack+0x8e/0xa0 [ 48.556675] __call_rcu_common.constprop.0+0x6a/0xb90 [ 48.557086] remove_vma+0x139/0x170 [ 48.557376] do_vmi_align_munmap+0xd4a/0x11f0 [ 48.557732] do_vmi_munmap+0x1f1/0x2b0 [ 48.558042] __vm_munmap+0x138/0x3a0 [ 48.558339] __x64_sys_munmap+0x59/0x80 [ 48.558653] do_syscall_64+0x3f/0x90 [ 48.558954] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 48.559360] [ 48.559496] The buggy address belongs to the object at ffff88800df299f8 [ 48.559496] which belongs to the cache vm_area_struct of size 168 [ 48.560437] The buggy address is located 88 bytes inside of [ 48.560437] freed 168-byte region [ffff88800df299f8, ffff88800df29aa0) [ 48.561312] [ 48.561451] The buggy address belongs to the physical page: [ 48.561867] page:00000000afcc9727 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdf29 [ 48.562551] memcg:ffff88800e53f401 [ 48.562822] flags: 0x100000000000200(slab|node=0|zone=1) [ 48.563230] page_type: 0xffffffff() [ 48.563517] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 48.564128] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e53f401 [ 48.564680] page dumped because: kasan: bad access detected [ 48.565081] [ 48.565215] Memory state around the buggy address: [ 48.565584] ffff88800df29900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 48.566125] ffff88800df29980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 48.566666] >ffff88800df29a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 48.567203] ^ [ 48.567652] ffff88800df29a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 48.568230] ffff88800df29b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 48.568770] ================================================================== [ 48.569765] Disabling lock debugging due to kernel taint [ 51.679861] BUG: Bad rss-counter state mm:00000000fc1b550b type:MM_FILEPAGES val:33 [ 51.684950] BUG: Bad rss-counter state mm:00000000fc1b550b type:MM_ANONPAGES val:22 [ 52.680037] BUG: Bad rss-counter state mm:00000000a7de427d type:MM_FILEPAGES val:33 [ 52.680956] BUG: Bad rss-counter state mm:00000000a7de427d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:41899' (ECDSA) to the list of known hosts. 2023/06/20 08:06:32 fuzzer started 2023/06/20 08:06:32 dialing manager at localhost:44161 2023/06/20 08:06:32 checking machine... 2023/06/20 08:06:32 checking revisions... [ 53.620946] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:06:32 testing simple program... [ 53.682469] cgroup: Unknown subsys name 'net' [ 53.747106] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:06:19 Registers: info registers vcpu 0 RAX=ffff88806c400000 RBX=000000006932793d RCX=ffff88806c53c9e8 RDX=0000000000000007 RSI=0000000000000002 RDI=00000000d6480af6 RBP=ffff88800da198c0 RSP=ffff888016927740 R8 =00000000c1e4b0b9 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000001 R13=0000000000000800 R14=ffff8880169277c8 R15=0000000000000007 RIP=ffffffff82270f13 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 00007f91f55f5900 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=00007f5735922328 CR3=000000000db16000 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=ffffffffffff00000000000000000000 XMM02=ffffffffffff00000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000073707574726174732064 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffffff8116fe2a RCX=0000000000000001 RDX=1ffff11002d24edf RSI=ffff888016927df8 RDI=ffffffff8116fe2a RBP=ffffffff8116fe2a RSP=ffff888016927650 R8 =0000000000000001 R9 =ffff8880169276e0 R10=0000000000038001 R11=000000000000712d R12=0000000000000001 R13=0000000000000000 R14=ffff88800c951b40 R15=ffff88801641ed10 RIP=ffffffff811fc772 RFL=00000283 [--S---C] 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 00007f91f55f5900 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=00007f2f2a653ef0 CR3=000000000db16000 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=ff000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000000000 XMM04=1e378bd41721dafa0000000000134de8 XMM05=d3fdd5f48436fbd700000000000aead0 XMM06=c677501daeff8b2700000000000ae988 XMM07=a1fcdcf819d7e1e500000000000ae728 XMM08=44495f474f4c5359530069253d595449 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000