syzkaller login: [ 61.464048] BUG: Bad rss-counter state mm:00000000b928cf20 type:MM_FILEPAGES val:33 [ 61.465300] BUG: Bad rss-counter state mm:00000000b928cf20 type:MM_ANONPAGES val:22 [ 61.619408] ================================================================== [ 61.620642] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 61.621253] Read of size 8 at addr ffff88801a84edf0 by task sshd/226 [ 61.621709] [ 61.621974] CPU: 1 PID: 226 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 61.622546] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 61.623180] Call Trace: [ 61.623394] [ 61.623569] dump_stack_lvl+0x91/0xf0 [ 61.623865] print_report+0xcc/0x620 [ 61.624172] ? __virt_addr_valid+0x102/0x340 [ 61.624522] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.624890] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.625288] kasan_report+0xbe/0xf0 [ 61.625601] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.625995] vma_interval_tree_remove+0xc75/0xec0 [ 61.626369] vma_prepare+0xc54/0x11a0 [ 61.626673] __split_vma+0x5af/0x950 [ 61.626965] ? __pfx___split_vma+0x10/0x10 [ 61.627296] ? find_held_lock+0x2c/0x110 [ 61.627631] do_vmi_align_munmap+0x2ba/0x11f0 [ 61.627980] ? lock_is_held_type+0x9f/0x120 [ 61.628316] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 61.628695] ? mtree_range_walk+0x632/0x900 [ 61.629031] ? mas_walk+0x5c7/0x7c0 [ 61.629319] do_vmi_munmap+0x1f1/0x2b0 [ 61.629649] mmap_region+0x1f9/0x2660 [ 61.629963] ? vm_mmap_pgoff+0x15c/0x3a0 [ 61.630281] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 61.630726] ? __pfx_lock_acquire+0x10/0x10 [ 61.631080] ? __pfx_mmap_region+0x10/0x10 [ 61.631411] ? security_mmap_addr+0x7d/0xa0 [ 61.631757] ? get_unmapped_area+0x1f5/0x3f0 [ 61.632122] do_mmap+0x854/0xf00 [ 61.632419] vm_mmap_pgoff+0x1a6/0x3a0 [ 61.632735] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 61.633110] ksys_mmap_pgoff+0x3af/0x500 [ 61.633444] do_syscall_64+0x3f/0x90 [ 61.633743] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.634166] RIP: 0033:0x7f99b35ecd82 [ 61.634474] 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 [ 61.635805] RSP: 002b:00007ffffa93c448 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 61.636355] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f99b35ecd82 [ 61.636883] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f99b2a26000 [ 61.637383] RBP: 00007f99b2a26000 R08: 0000000000000009 R09: 0000000000001000 [ 61.637894] R10: 0000000000000812 R11: 0000000000000206 R12: 000056198e422b20 [ 61.638441] R13: 00007ffffa93c460 R14: 00007ffffa93c490 R15: 00007ffffa93c7f0 [ 61.639003] [ 61.639194] [ 61.639331] Allocated by task 219: [ 61.639606] kasan_save_stack+0x22/0x50 [ 61.639916] kasan_set_track+0x25/0x30 [ 61.640227] __kasan_slab_alloc+0x59/0x70 [ 61.640559] kmem_cache_alloc+0x16b/0x370 [ 61.640888] vm_area_dup+0x20/0x160 [ 61.641182] __split_vma+0x170/0x950 [ 61.641474] split_vma+0xc6/0x110 [ 61.641757] mprotect_fixup+0x8d2/0xb30 [ 61.642085] do_mprotect_pkey+0x87e/0xd40 [ 61.642438] __x64_sys_mprotect+0x78/0xc0 [ 61.642775] do_syscall_64+0x3f/0x90 [ 61.643082] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.643482] [ 61.643611] Freed by task 202: [ 61.643852] kasan_save_stack+0x22/0x50 [ 61.644173] kasan_set_track+0x25/0x30 [ 61.644495] kasan_save_free_info+0x2b/0x50 [ 61.644824] __kasan_slab_free+0x10a/0x190 [ 61.645152] kmem_cache_free+0x10d/0x4d0 [ 61.645469] rcu_core+0x8c8/0x2860 [ 61.645745] __do_softirq+0x1b7/0x7d4 [ 61.646045] [ 61.646179] Last potentially related work creation: [ 61.646547] kasan_save_stack+0x22/0x50 [ 61.646861] __kasan_record_aux_stack+0x8e/0xa0 [ 61.647219] __call_rcu_common.constprop.0+0x6a/0xb90 [ 61.647628] remove_vma+0x139/0x170 [ 61.647913] do_vmi_align_munmap+0xd4a/0x11f0 [ 61.648256] do_vmi_munmap+0x1f1/0x2b0 [ 61.648564] __vm_munmap+0x138/0x3a0 [ 61.648850] __x64_sys_munmap+0x59/0x80 [ 61.649153] do_syscall_64+0x3f/0x90 [ 61.649449] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.649851] [ 61.649985] The buggy address belongs to the object at ffff88801a84ed98 [ 61.649985] which belongs to the cache vm_area_struct of size 168 [ 61.650898] The buggy address is located 88 bytes inside of [ 61.650898] freed 168-byte region [ffff88801a84ed98, ffff88801a84ee40) [ 61.651766] [ 61.651898] The buggy address belongs to the physical page: [ 61.652306] page:000000003fd07351 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a84e [ 61.652998] memcg:ffff88801a848201 [ 61.653260] flags: 0x100000000000200(slab|node=0|zone=1) [ 61.653663] page_type: 0xffffffff() [ 61.653941] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 61.654504] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a848201 [ 61.655066] page dumped because: kasan: bad access detected [ 61.655472] [ 61.655602] Memory state around the buggy address: [ 61.655963] ffff88801a84ec80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 61.656500] ffff88801a84ed00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 61.657035] >ffff88801a84ed80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 61.657563] ^ [ 61.658069] ffff88801a84ee00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 61.658605] ffff88801a84ee80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.659137] ================================================================== [ 61.659741] Disabling lock debugging due to kernel taint [ 63.793623] BUG: Bad rss-counter state mm:000000001487a44b type:MM_FILEPAGES val:33 [ 63.794590] BUG: Bad rss-counter state mm:000000001487a44b type:MM_ANONPAGES val:22 [ 64.298986] BUG: Bad rss-counter state mm:00000000ab8eb880 type:MM_FILEPAGES val:33 [ 64.300256] BUG: Bad rss-counter state mm:00000000ab8eb880 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:48808' (ECDSA) to the list of known hosts. 2023/06/21 01:29:09 fuzzer started 2023/06/21 01:29:09 dialing manager at localhost:36067 2023/06/21 01:29:09 checking machine... 2023/06/21 01:29:09 checking revisions... [ 65.030015] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:29:09 testing simple program... [ 65.079532] cgroup: Unknown subsys name 'net' [ 65.121429] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:29:09 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffff88806ce35000 RCX=ffffffff812d8f13 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=0000000000000000 RSP=ffff8880146bfa40 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6d53 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff8135b980 RFL=00000286 [--S--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 00007f85c0493900 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=00007f85bf8d5900 CR3=0000000009af6000 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=ec46918ddac8fb6400000000000ae988 XMM05=b057fdcfe01544180000000000133180 XMM06=13e856d8d71426c80000000000132220 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88806cf09b40 RCX=0000000000000001 RDX=1ffff1100d9e1380 RSI=ffffffff8460144a RDI=ffff88806cf09b4c RBP=ffff88806cf09c00 RSP=ffff88806cf09a58 R8 =0000000000000001 R9 =ffff88806cf09ab8 R10=0000000000038001 R11=00000000000b5305 R12=ffff88806cf09b40 R13=0000000000000000 R14=ffff888016ad51c0 R15=ffff88800ed8d600 RIP=ffffffff813ad547 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 00007f376ff2f900 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=00007f37704e70b0 CR3=000000001a950000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000