syzkaller login: [ 43.365057] BUG: Bad rss-counter state mm:0000000086a6e70e type:MM_FILEPAGES val:33 [ 43.366211] BUG: Bad rss-counter state mm:0000000086a6e70e type:MM_ANONPAGES val:22 [ 43.523563] ================================================================== [ 43.524486] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 43.525412] Read of size 8 at addr ffff88800eb86798 by task sshd/219 [ 43.526191] [ 43.526406] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 43.527437] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 43.528420] Call Trace: [ 43.528740] [ 43.529023] dump_stack_lvl+0x91/0xf0 [ 43.529671] print_report+0xcc/0x620 [ 43.530280] ? __virt_addr_valid+0x102/0x340 [ 43.530983] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.531723] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.532468] kasan_report+0xbe/0xf0 [ 43.533067] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.533826] vma_interval_tree_remove+0xc75/0xec0 [ 43.534587] vma_prepare+0xc54/0x11a0 [ 43.535213] __split_vma+0x5af/0x950 [ 43.535798] ? __pfx___split_vma+0x10/0x10 [ 43.536445] ? find_held_lock+0x2c/0x110 [ 43.537084] do_vmi_align_munmap+0x2ba/0x11f0 [ 43.537781] ? lock_is_held_type+0x9f/0x120 [ 43.538471] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 43.539255] ? mtree_range_walk+0x632/0x900 [ 43.539810] ? mas_walk+0x5c7/0x7c0 [ 43.540284] do_vmi_munmap+0x1f1/0x2b0 [ 43.540781] mmap_region+0x1f9/0x2660 [ 43.541260] ? vm_mmap_pgoff+0x15c/0x3a0 [ 43.541772] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 43.542505] ? __pfx_lock_acquire+0x10/0x10 [ 43.543077] ? __pfx_mmap_region+0x10/0x10 [ 43.543612] ? security_mmap_addr+0x7d/0xa0 [ 43.544149] ? get_unmapped_area+0x1f5/0x3f0 [ 43.544700] do_mmap+0x854/0xf00 [ 43.545136] vm_mmap_pgoff+0x1a6/0x3a0 [ 43.545644] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 43.546214] ksys_mmap_pgoff+0x3af/0x500 [ 43.546720] do_syscall_64+0x3f/0x90 [ 43.547231] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.547875] RIP: 0033:0x7fda79cc2d82 [ 43.548337] 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 [ 43.550490] RSP: 002b:00007ffcb8fd4b48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 43.551424] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fda79cc2d82 [ 43.552268] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fda790fc000 [ 43.553112] RBP: 00007fda790fc000 R08: 0000000000000009 R09: 0000000000001000 [ 43.553948] R10: 0000000000000812 R11: 0000000000000206 R12: 000055db78dc0ec0 [ 43.554826] R13: 00007ffcb8fd4b60 R14: 00007ffcb8fd4b90 R15: 00007ffcb8fd4ef0 [ 43.555719] [ 43.556019] [ 43.556234] Allocated by task 212: [ 43.556660] kasan_save_stack+0x22/0x50 [ 43.557184] kasan_set_track+0x25/0x30 [ 43.557675] __kasan_slab_alloc+0x59/0x70 [ 43.558222] kmem_cache_alloc+0x16b/0x370 [ 43.558750] vm_area_dup+0x20/0x160 [ 43.559246] __split_vma+0x170/0x950 [ 43.559722] split_vma+0xc6/0x110 [ 43.560165] mprotect_fixup+0x8d2/0xb30 [ 43.560664] do_mprotect_pkey+0x87e/0xd40 [ 43.561192] __x64_sys_mprotect+0x78/0xc0 [ 43.561713] do_syscall_64+0x3f/0x90 [ 43.562202] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.562870] [ 43.563097] Freed by task 212: [ 43.563488] kasan_save_stack+0x22/0x50 [ 43.563987] kasan_set_track+0x25/0x30 [ 43.564475] kasan_save_free_info+0x2b/0x50 [ 43.565007] __kasan_slab_free+0x10a/0x190 [ 43.565535] kmem_cache_free+0x10d/0x4d0 [ 43.566051] rcu_core+0x8c8/0x2860 [ 43.566515] __do_softirq+0x1b7/0x7d4 [ 43.567030] [ 43.567246] Last potentially related work creation: [ 43.567931] kasan_save_stack+0x22/0x50 [ 43.568436] __kasan_record_aux_stack+0x8e/0xa0 [ 43.569011] __call_rcu_common.constprop.0+0x6a/0xb90 [ 43.569656] remove_vma+0x139/0x170 [ 43.570122] do_vmi_align_munmap+0xd4a/0x11f0 [ 43.570691] do_vmi_munmap+0x1f1/0x2b0 [ 43.571209] __vm_munmap+0x138/0x3a0 [ 43.571681] __x64_sys_munmap+0x59/0x80 [ 43.572179] do_syscall_64+0x3f/0x90 [ 43.572655] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.573301] [ 43.573521] The buggy address belongs to the object at ffff88800eb86740 [ 43.573521] which belongs to the cache vm_area_struct of size 168 [ 43.575017] The buggy address is located 88 bytes inside of [ 43.575017] freed 168-byte region [ffff88800eb86740, ffff88800eb867e8) [ 43.576407] [ 43.576626] The buggy address belongs to the physical page: [ 43.577273] page:0000000003724902 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeb86 [ 43.578408] memcg:ffff888018a6c201 [ 43.578831] flags: 0x100000000000200(slab|node=0|zone=1) [ 43.579480] page_type: 0xffffffff() [ 43.579931] raw: 0100000000000200 ffff88800879fc80 ffffea0000629940 dead000000000002 [ 43.580857] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018a6c201 [ 43.581757] page dumped because: kasan: bad access detected [ 43.582468] [ 43.582685] Memory state around the buggy address: [ 43.583260] ffff88800eb86680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 43.584106] ffff88800eb86700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 43.584959] >ffff88800eb86780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 43.585820] ^ [ 43.586365] ffff88800eb86800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 43.587208] ffff88800eb86880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 43.588051] ================================================================== [ 43.588954] Disabling lock debugging due to kernel taint [ 45.538567] BUG: Bad rss-counter state mm:0000000074c7f462 type:MM_FILEPAGES val:33 [ 45.539516] BUG: Bad rss-counter state mm:0000000074c7f462 type:MM_ANONPAGES val:22 [ 46.096814] BUG: Bad rss-counter state mm:0000000027b9d584 type:MM_FILEPAGES val:33 [ 46.097983] BUG: Bad rss-counter state mm:0000000027b9d584 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:64094' (ECDSA) to the list of known hosts. 2023/06/19 15:11:53 fuzzer started 2023/06/19 15:11:54 dialing manager at localhost:44161 2023/06/19 15:11:54 checking machine... 2023/06/19 15:11:54 checking revisions... [ 46.742331] kmemleak: Automatic memory scanning thread ended 2023/06/19 15:11:54 testing simple program... [ 46.805125] cgroup: Unknown subsys name 'net' [ 46.867515] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:11:49 Registers: info registers vcpu 0 RAX=ffffffff81ef60ea RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff11002cd7f30 RSI=ffffffff81ef60ea RDI=ffff8880166bf9f0 RBP=ffff8880166bf9c0 RSP=ffff8880166bf920 R8 =0000000000000001 R9 =ffff8880166bf968 R10=0000000000038001 R11=00000000000397e7 R12=ffff8880166bf9f0 R13=0000000000000000 R14=ffff88800fa9b680 R15=ffff88800d8fb000 RIP=ffffffff813ad424 RFL=00000282 [--S----] 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 00007f66bb066900 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=00007f66bb61e0b0 CR3=000000001cc84000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88800f066400 RCX=ffffffff814d44b4 RDX=ffff888014700000 RSI=0000000000000000 RDI=0000000000000005 RBP=00000000000000ba RSP=ffff8880146ffde0 R8 =0000000000000005 R9 =00000000c000003e R10=00000000c000003e R11=0000000000000000 R12=00000000c000003e R13=0000000000000000 R14=ffff8880146ffe30 R15=0000000000000000 RIP=ffffffff814c07e4 RFL=00000246 [---Z-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 00007ff3cd9e2900 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=00007ff3ccf02000 CR3=0000000008ed8000 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=6e2a8e37f2bfe4ac0d4ca6ba6018f19c XMM02=eff9b2d0a8fce9cb0000000000121218 XMM03=2c67c8bc2e329bc30000000000121340 XMM04=ca5913315b89f25600000000000ae988 XMM05=d6ce6ec0ddc0c16e0000000000134d68 XMM06=806171799158d96700000000001337e8 XMM07=fb795ef6d65770560000000000124038 XMM08=2c67c8bc2e329bc30000000000121340 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000