syzkaller login: [ 61.619700] BUG: Bad rss-counter state mm:00000000090afe2f type:MM_FILEPAGES val:33 [ 61.620892] BUG: Bad rss-counter state mm:00000000090afe2f type:MM_ANONPAGES val:22 [ 61.654811] ================================================================== [ 61.655805] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 61.656740] Read of size 8 at addr ffff88800f013ed8 by task sshd/219 [ 61.657496] [ 61.657710] CPU: 0 PID: 219 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 61.658832] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 61.659834] Call Trace: [ 61.660160] [ 61.660442] dump_stack_lvl+0x91/0xf0 [ 61.660929] print_report+0xcc/0x620 [ 61.661423] ? __virt_addr_valid+0x102/0x340 [ 61.661977] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.662586] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.663210] kasan_report+0xbe/0xf0 [ 61.663692] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.664302] vma_interval_tree_remove+0xc75/0xec0 [ 61.664904] vma_prepare+0xc54/0x11a0 [ 61.665382] __split_vma+0x5af/0x950 [ 61.665851] ? __pfx___split_vma+0x10/0x10 [ 61.666377] ? find_held_lock+0x2c/0x110 [ 61.666921] do_vmi_align_munmap+0x2ba/0x11f0 [ 61.667482] ? lock_is_held_type+0x9f/0x120 [ 61.668020] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 61.668627] ? mtree_range_walk+0x632/0x900 [ 61.669177] ? mas_walk+0x5c7/0x7c0 [ 61.669660] do_vmi_munmap+0x1f1/0x2b0 [ 61.670153] mmap_region+0x1f9/0x2660 [ 61.670636] ? vm_mmap_pgoff+0x15c/0x3a0 [ 61.671166] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 61.671904] ? __pfx_lock_acquire+0x10/0x10 [ 61.672434] ? __pfx_mmap_region+0x10/0x10 [ 61.672964] ? security_mmap_addr+0x7d/0xa0 [ 61.673493] ? get_unmapped_area+0x1f5/0x3f0 [ 61.674049] do_mmap+0x854/0xf00 [ 61.674495] vm_mmap_pgoff+0x1a6/0x3a0 [ 61.675014] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 61.675574] ksys_mmap_pgoff+0x3af/0x500 [ 61.676085] do_syscall_64+0x3f/0x90 [ 61.676557] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.677206] RIP: 0033:0x7fd1d10bed82 [ 61.677662] 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 [ 61.679813] RSP: 002b:00007ffd3ae92708 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 61.680726] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd1d10bed82 [ 61.681581] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd1d04f8000 [ 61.682431] RBP: 00007fd1d04f8000 R08: 0000000000000009 R09: 0000000000001000 [ 61.683303] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c736016ec0 [ 61.684142] R13: 00007ffd3ae92720 R14: 00007ffd3ae92750 R15: 00007ffd3ae92ab0 [ 61.684993] [ 61.685287] [ 61.685511] Allocated by task 212: [ 61.685937] kasan_save_stack+0x22/0x50 [ 61.686447] kasan_set_track+0x25/0x30 [ 61.686945] __kasan_slab_alloc+0x59/0x70 [ 61.687470] kmem_cache_alloc+0x16b/0x370 [ 61.687989] vm_area_dup+0x20/0x160 [ 61.688451] __split_vma+0x170/0x950 [ 61.688919] split_vma+0xc6/0x110 [ 61.689355] mprotect_fixup+0x8d2/0xb30 [ 61.689858] do_mprotect_pkey+0x87e/0xd40 [ 61.690373] __x64_sys_mprotect+0x78/0xc0 [ 61.690902] do_syscall_64+0x3f/0x90 [ 61.691376] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.692018] [ 61.692234] Freed by task 212: [ 61.692624] kasan_save_stack+0x22/0x50 [ 61.693126] kasan_set_track+0x25/0x30 [ 61.693620] kasan_save_free_info+0x2b/0x50 [ 61.694149] __kasan_slab_free+0x10a/0x190 [ 61.694677] kmem_cache_free+0x10d/0x4d0 [ 61.695204] rcu_core+0x8c8/0x2860 [ 61.695644] __do_softirq+0x1b7/0x7d4 [ 61.696121] [ 61.696334] Last potentially related work creation: [ 61.696918] kasan_save_stack+0x22/0x50 [ 61.697423] __kasan_record_aux_stack+0x8e/0xa0 [ 61.697986] __call_rcu_common.constprop.0+0x6a/0xb90 [ 61.698620] remove_vma+0x139/0x170 [ 61.699086] do_vmi_align_munmap+0xd4a/0x11f0 [ 61.699643] do_vmi_munmap+0x1f1/0x2b0 [ 61.700125] __vm_munmap+0x138/0x3a0 [ 61.700596] __x64_sys_munmap+0x59/0x80 [ 61.701094] do_syscall_64+0x3f/0x90 [ 61.701568] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.702206] [ 61.702422] The buggy address belongs to the object at ffff88800f013e80 [ 61.702422] which belongs to the cache vm_area_struct of size 168 [ 61.703891] The buggy address is located 88 bytes inside of [ 61.703891] freed 168-byte region [ffff88800f013e80, ffff88800f013f28) [ 61.705271] [ 61.705495] The buggy address belongs to the physical page: [ 61.706140] page:000000008161b98f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf013 [ 61.707225] memcg:ffff88800dfaee01 [ 61.707650] flags: 0x100000000000200(slab|node=0|zone=1) [ 61.708289] page_type: 0xffffffff() [ 61.708730] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 61.709650] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dfaee01 [ 61.710547] page dumped because: kasan: bad access detected [ 61.711222] [ 61.711438] Memory state around the buggy address: [ 61.712013] ffff88800f013d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 61.712864] ffff88800f013e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 61.713716] >ffff88800f013e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.714554] ^ [ 61.715283] ffff88800f013f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 61.716147] ffff88800f013f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 61.717001] ================================================================== [ 61.718045] Disabling lock debugging due to kernel taint [ 63.688774] BUG: Bad rss-counter state mm:00000000f0729db7 type:MM_FILEPAGES val:33 [ 63.689948] BUG: Bad rss-counter state mm:00000000f0729db7 type:MM_ANONPAGES val:22 [ 64.164864] BUG: Bad rss-counter state mm:00000000bc56be54 type:MM_FILEPAGES val:33 [ 64.166030] BUG: Bad rss-counter state mm:00000000bc56be54 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38435' (ECDSA) to the list of known hosts. 2023/06/19 18:48:02 fuzzer started 2023/06/19 18:48:03 dialing manager at localhost:44161 2023/06/19 18:48:03 checking machine... 2023/06/19 18:48:03 checking revisions... [ 64.802806] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:48:03 testing simple program... [ 64.871355] cgroup: Unknown subsys name 'net' [ 64.946300] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:47:32 Registers: info registers vcpu 0 RAX=fffffbfff0ba77db RBX=fffffbfff0ba77db RCX=ffffffff812d8ec3 RDX=fffffbfff0ba77db RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=fffffbfff0ba77da RSP=ffff88806ce09918 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b5420 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff8180f004 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 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=00007ffc78f80558 CR3=000000000e984000 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=2032303a38343a3831203931206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032303a38343a3831203931 XMM08=00007f76940235500000004f00000080 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f7d049defb0 CR3=000000000c3f2000 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=e498a08f044cd6bccc43edaa91be616b XMM02=0000000000125d10eff9b2d0a8fce9cb XMM03=0000000000125de02c67c8bc2e329bc3 XMM04=75423a0c1bbcb5f400000000000ae988 XMM05=dfcdbad4f1609c37000000000013cc60 XMM06=d8668128354e4e33000000000013bac8 XMM07=e042d86d42eb936e000000000012d4a0 XMM08=c672b8d182ea09d00000000000125de0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000