syzkaller login: [ 31.292466] BUG: Bad rss-counter state mm:000000003ea6a99e type:MM_FILEPAGES val:33 [ 31.294877] BUG: Bad rss-counter state mm:000000003ea6a99e type:MM_ANONPAGES val:22 [ 31.467009] ================================================================== [ 31.468036] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.469081] Read of size 8 at addr ffff8880101f96b0 by task sshd/220 [ 31.469939] [ 31.470334] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.471348] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.472432] Call Trace: [ 31.472833] [ 31.473172] dump_stack_lvl+0x91/0xf0 [ 31.473720] print_report+0xcc/0x620 [ 31.474255] ? __virt_addr_valid+0x102/0x340 [ 31.474889] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.475568] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.476257] kasan_report+0xbe/0xf0 [ 31.476799] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.477504] vma_interval_tree_remove+0xc75/0xec0 [ 31.478189] vma_prepare+0xc54/0x11a0 [ 31.478763] __split_vma+0x5af/0x950 [ 31.479298] ? __pfx___split_vma+0x10/0x10 [ 31.479893] ? find_held_lock+0x2c/0x110 [ 31.480482] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.481135] ? lock_is_held_type+0x9f/0x120 [ 31.481794] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.482484] ? mtree_range_walk+0x632/0x900 [ 31.483137] ? mas_walk+0x5c7/0x7c0 [ 31.483681] do_vmi_munmap+0x1f1/0x2b0 [ 31.484243] mmap_region+0x1f9/0x2660 [ 31.484792] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.485379] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.486189] ? __pfx_lock_acquire+0x10/0x10 [ 31.486809] ? __pfx_mmap_region+0x10/0x10 [ 31.487417] ? security_mmap_addr+0x7d/0xa0 [ 31.488081] ? get_unmapped_area+0x1f5/0x3f0 [ 31.488735] do_mmap+0x854/0xf00 [ 31.489236] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.489795] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.490465] ksys_mmap_pgoff+0x3af/0x500 [ 31.491076] do_syscall_64+0x3f/0x90 [ 31.491629] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.492371] RIP: 0033:0x7fa3a6cdad82 [ 31.492895] 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 [ 31.495441] RSP: 002b:00007ffc5cdf9138 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.496472] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa3a6cdad82 [ 31.497437] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa3a6114000 [ 31.498397] RBP: 00007fa3a6114000 R08: 0000000000000009 R09: 0000000000001000 [ 31.499376] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d3cc6dcec0 [ 31.500343] R13: 00007ffc5cdf9150 R14: 00007ffc5cdf9180 R15: 00007ffc5cdf94e0 [ 31.501365] [ 31.501705] [ 31.501949] Allocated by task 213: [ 31.502438] kasan_save_stack+0x22/0x50 [ 31.503060] kasan_set_track+0x25/0x30 [ 31.503625] __kasan_slab_alloc+0x59/0x70 [ 31.504219] kmem_cache_alloc+0x16b/0x370 [ 31.504800] vm_area_dup+0x20/0x160 [ 31.505314] __split_vma+0x170/0x950 [ 31.505870] split_vma+0xc6/0x110 [ 31.506413] mprotect_fixup+0x8d2/0xb30 [ 31.507029] do_mprotect_pkey+0x87e/0xd40 [ 31.507660] __x64_sys_mprotect+0x78/0xc0 [ 31.508278] do_syscall_64+0x3f/0x90 [ 31.508819] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.509559] [ 31.509803] Freed by task 213: [ 31.510252] kasan_save_stack+0x22/0x50 [ 31.510854] kasan_set_track+0x25/0x30 [ 31.511421] kasan_save_free_info+0x2b/0x50 [ 31.512024] __kasan_slab_free+0x10a/0x190 [ 31.512660] kmem_cache_free+0x10d/0x4d0 [ 31.513239] rcu_core+0x8c8/0x2860 [ 31.513762] __do_softirq+0x1b7/0x7d4 [ 31.514337] [ 31.514602] Last potentially related work creation: [ 31.515271] kasan_save_stack+0x22/0x50 [ 31.515852] __kasan_record_aux_stack+0x8e/0xa0 [ 31.516508] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.517233] remove_vma+0x139/0x170 [ 31.517748] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.518383] do_vmi_munmap+0x1f1/0x2b0 [ 31.518947] __vm_munmap+0x138/0x3a0 [ 31.519479] __x64_sys_munmap+0x59/0x80 [ 31.520045] do_syscall_64+0x3f/0x90 [ 31.520583] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.521341] [ 31.521608] The buggy address belongs to the object at ffff8880101f9658 [ 31.521608] which belongs to the cache vm_area_struct of size 168 [ 31.523319] The buggy address is located 88 bytes inside of [ 31.523319] freed 168-byte region [ffff8880101f9658, ffff8880101f9700) [ 31.524961] [ 31.525203] The buggy address belongs to the physical page: [ 31.526000] page:0000000097c09915 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x101f9 [ 31.527267] memcg:ffff888019c6eb01 [ 31.527762] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.528556] page_type: 0xffffffff() [ 31.529077] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.530107] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019c6eb01 [ 31.531151] page dumped because: kasan: bad access detected [ 31.531891] [ 31.532131] Memory state around the buggy address: [ 31.532785] ffff8880101f9580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.533763] ffff8880101f9600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.534734] >ffff8880101f9680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.535738] ^ [ 31.536389] ffff8880101f9700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.537377] ffff8880101f9780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.538365] ================================================================== [ 31.539654] Disabling lock debugging due to kernel taint [ 34.406298] BUG: Bad rss-counter state mm:00000000ff3715f3 type:MM_FILEPAGES val:33 [ 34.407562] BUG: Bad rss-counter state mm:00000000ff3715f3 type:MM_ANONPAGES val:22 [ 34.800059] BUG: Bad rss-counter state mm:00000000df69ae5a type:MM_FILEPAGES val:33 [ 34.801088] BUG: Bad rss-counter state mm:00000000df69ae5a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:19165' (ECDSA) to the list of known hosts. 2023/06/20 13:35:54 fuzzer started 2023/06/20 13:35:54 dialing manager at localhost:36067 2023/06/20 13:35:54 checking machine... 2023/06/20 13:35:54 checking revisions... [ 35.522364] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:35:54 testing simple program... [ 35.578754] cgroup: Unknown subsys name 'net' [ 35.618179] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:35:54 Registers: info registers vcpu 0 RAX=ffff888013c4f4e0 RBX=ffff888013c50788 RCX=1ffff110026fd344 RDX=dffffc0000000000 RSI=ffff88801b87c5b8 RDI=ffff888013c507b8 RBP=ffff8880137e99f0 RSP=ffff8880146bf848 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6d53 R12=ffff88801b87c580 R13=0000000000000000 R14=ffff88800c463e88 R15=ffff88800c463e40 RIP=ffffffff81847688 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f7a2a408900 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=00007f7a2980ed90 CR3=000000000da0e000 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=656e6e6f637369443d4547415353454d XMM01=2e303120746f6f722072657375206d6f XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=6e2b1f1e7754999100000000000ae988 XMM05=fa1556b2eea85f700000000000132588 XMM06=19e9129bd510f23500000000001316d0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007ffcb273b2c8 CR3=0000000005482000 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=00007fba51d835100000556514622790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000