syzkaller login: [ 35.529802] BUG: Bad rss-counter state mm:00000000bbe13761 type:MM_FILEPAGES val:33 [ 35.530499] BUG: Bad rss-counter state mm:00000000bbe13761 type:MM_ANONPAGES val:22 [ 35.639759] ================================================================== [ 35.640434] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.641040] Read of size 8 at addr ffff88800ecb1df0 by task sshd/221 [ 35.641515] [ 35.641677] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 35.642308] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.642934] Call Trace: [ 35.643146] [ 35.643334] dump_stack_lvl+0x91/0xf0 [ 35.643665] print_report+0xcc/0x620 [ 35.644226] ? __virt_addr_valid+0x102/0x340 [ 35.644595] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.645010] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.645415] kasan_report+0xbe/0xf0 [ 35.645766] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.646264] vma_interval_tree_remove+0xc75/0xec0 [ 35.646713] vma_prepare+0xc54/0x11a0 [ 35.647055] __split_vma+0x5af/0x950 [ 35.647346] ? __pfx___split_vma+0x10/0x10 [ 35.647697] ? find_held_lock+0x2c/0x110 [ 35.648127] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.648516] ? lock_is_held_type+0x9f/0x120 [ 35.648916] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.649318] ? mtree_range_walk+0x632/0x900 [ 35.649694] ? mas_walk+0x5c7/0x7c0 [ 35.650053] do_vmi_munmap+0x1f1/0x2b0 [ 35.650398] mmap_region+0x1f9/0x2660 [ 35.650751] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.651114] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.651589] ? __pfx_lock_acquire+0x10/0x10 [ 35.651983] ? __pfx_mmap_region+0x10/0x10 [ 35.652338] ? security_mmap_addr+0x7d/0xa0 [ 35.652699] ? get_unmapped_area+0x1f5/0x3f0 [ 35.653175] do_mmap+0x854/0xf00 [ 35.653501] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.653876] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.654251] ksys_mmap_pgoff+0x3af/0x500 [ 35.654582] do_syscall_64+0x3f/0x90 [ 35.654945] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.655366] RIP: 0033:0x7fe281aa9d82 [ 35.655654] 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 [ 35.657034] RSP: 002b:00007fffc4c146b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.657634] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe281aa9d82 [ 35.658217] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe280ee3000 [ 35.658775] RBP: 00007fe280ee3000 R08: 0000000000000009 R09: 0000000000001000 [ 35.659456] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f0a688ff60 [ 35.660074] R13: 00007fffc4c146d0 R14: 00007fffc4c14700 R15: 00007fffc4c14a60 [ 35.660638] [ 35.660832] [ 35.660985] Allocated by task 214: [ 35.661268] kasan_save_stack+0x22/0x50 [ 35.661612] kasan_set_track+0x25/0x30 [ 35.661943] __kasan_slab_alloc+0x59/0x70 [ 35.662286] kmem_cache_alloc+0x16b/0x370 [ 35.662614] vm_area_dup+0x20/0x160 [ 35.662913] __split_vma+0x170/0x950 [ 35.663217] split_vma+0xc6/0x110 [ 35.663497] mprotect_fixup+0x8d2/0xb30 [ 35.663822] do_mprotect_pkey+0x87e/0xd40 [ 35.664216] __x64_sys_mprotect+0x78/0xc0 [ 35.664556] do_syscall_64+0x3f/0x90 [ 35.664865] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.665295] [ 35.665435] Freed by task 204: [ 35.665693] kasan_save_stack+0x22/0x50 [ 35.666079] kasan_set_track+0x25/0x30 [ 35.666401] kasan_save_free_info+0x2b/0x50 [ 35.666758] __kasan_slab_free+0x10a/0x190 [ 35.667121] kmem_cache_free+0x10d/0x4d0 [ 35.667463] rcu_core+0x8c8/0x2860 [ 35.667764] __do_softirq+0x1b7/0x7d4 [ 35.668124] [ 35.668268] Last potentially related work creation: [ 35.668655] kasan_save_stack+0x22/0x50 [ 35.668982] __kasan_record_aux_stack+0x8e/0xa0 [ 35.669356] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.669773] remove_vma+0x139/0x170 [ 35.670083] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.670462] do_vmi_munmap+0x1f1/0x2b0 [ 35.670813] __vm_munmap+0x138/0x3a0 [ 35.671117] __x64_sys_munmap+0x59/0x80 [ 35.671448] do_syscall_64+0x3f/0x90 [ 35.671766] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.672267] [ 35.672404] The buggy address belongs to the object at ffff88800ecb1d98 [ 35.672404] which belongs to the cache vm_area_struct of size 168 [ 35.673379] The buggy address is located 88 bytes inside of [ 35.673379] freed 168-byte region [ffff88800ecb1d98, ffff88800ecb1e40) [ 35.674333] [ 35.674476] The buggy address belongs to the physical page: [ 35.674927] page:000000007d1db3b6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xecb1 [ 35.675654] memcg:ffff88800d17da01 [ 35.675992] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 35.676469] page_type: 0xffffffff() [ 35.676781] raw: 0100000000000200 ffff8880087a0c80 ffffea000037b880 dead000000000007 [ 35.677385] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d17da01 [ 35.677961] page dumped because: kasan: bad access detected [ 35.678393] [ 35.678538] Memory state around the buggy address: [ 35.678916] ffff88800ecb1c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 35.679485] ffff88800ecb1d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 35.680104] >ffff88800ecb1d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 35.680673] ^ [ 35.681240] ffff88800ecb1e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 35.681813] ffff88800ecb1e80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.682366] ================================================================== [ 35.683157] Disabling lock debugging due to kernel taint [ 37.129680] BUG: Bad rss-counter state mm:00000000e50466df type:MM_FILEPAGES val:33 [ 37.130399] BUG: Bad rss-counter state mm:00000000e50466df type:MM_ANONPAGES val:22 [ 37.476822] BUG: Bad rss-counter state mm:00000000f9a8f438 type:MM_FILEPAGES val:33 [ 37.477540] BUG: Bad rss-counter state mm:00000000f9a8f438 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:41683' (ECDSA) to the list of known hosts. 2023/06/21 09:49:24 fuzzer started 2023/06/21 09:49:24 dialing manager at localhost:36067 2023/06/21 09:49:24 checking machine... 2023/06/21 09:49:24 checking revisions... [ 38.086948] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:49:24 testing simple program... [ 38.128204] cgroup: Unknown subsys name 'net' [ 38.172973] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:49:24 Registers: info registers vcpu 0 RAX=0000000000000007 RBX=0000000000000000 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000007 RDI=ffff88801434ff58 RBP=0000000000000000 RSP=ffff88801434ff50 R8 =0000000000000000 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000000 R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff84538a42 RFL=00000046 [---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 00007fe6ca572700 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=00007f5fe7b39ba0 CR3=000000000e7ec000 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=39343a3930203132206e754a3e38333c XMM01=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3033325b646873732034323a3934 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363635 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88806cf39500 RCX=00000008b9127ace RDX=1ffff1100d9e73fc RSI=0000000000000004 RDI=ffff8880169036ac RBP=ffffffff85d3e490 RSP=ffff88806cf09d40 R8 =ffff88806cf39f40 R9 =ffffed100d9e13a3 R10=0000000000000003 R11=ffff88806cf09ff8 R12=00000000000f4064 R13=0000000000000001 R14=ffff88806cf39f08 R15=ffff888016903680 RIP=ffffffff812361bd RFL=00000046 [---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 00007f05376e2900 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=00007f053768c008 CR3=000000001cd92000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000