syzkaller login: [ 98.434146] BUG: Bad rss-counter state mm:00000000ba982000 type:MM_FILEPAGES val:33 [ 98.435539] BUG: Bad rss-counter state mm:00000000ba982000 type:MM_ANONPAGES val:22 [ 98.582842] ================================================================== [ 98.583916] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 98.585031] Read of size 8 at addr ffff88801a141ed8 by task sshd/226 [ 98.586074] [ 98.586302] CPU: 1 PID: 226 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 98.587189] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 98.588180] Call Trace: [ 98.588510] [ 98.588797] dump_stack_lvl+0x91/0xf0 [ 98.589295] print_report+0xcc/0x620 [ 98.589782] ? __virt_addr_valid+0x102/0x340 [ 98.590343] ? vma_interval_tree_remove+0xc75/0xec0 [ 98.590974] ? vma_interval_tree_remove+0xc75/0xec0 [ 98.591601] kasan_report+0xbe/0xf0 [ 98.592082] ? vma_interval_tree_remove+0xc75/0xec0 [ 98.592706] vma_interval_tree_remove+0xc75/0xec0 [ 98.593312] vma_prepare+0xc54/0x11a0 [ 98.593793] __split_vma+0x5af/0x950 [ 98.594271] ? __pfx___split_vma+0x10/0x10 [ 98.594832] ? find_held_lock+0x2c/0x110 [ 98.595361] do_vmi_align_munmap+0x2ba/0x11f0 [ 98.595929] ? lock_is_held_type+0x9f/0x120 [ 98.596468] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 98.597079] ? mtree_range_walk+0x632/0x900 [ 98.597637] ? mas_walk+0x5c7/0x7c0 [ 98.598114] do_vmi_munmap+0x1f1/0x2b0 [ 98.598627] mmap_region+0x1f9/0x2660 [ 98.599110] ? vm_mmap_pgoff+0x15c/0x3a0 [ 98.599632] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 98.600349] ? __pfx_lock_acquire+0x10/0x10 [ 98.600890] ? __pfx_mmap_region+0x10/0x10 [ 98.601424] ? security_mmap_addr+0x7d/0xa0 [ 98.601959] ? get_unmapped_area+0x1f5/0x3f0 [ 98.602524] do_mmap+0x854/0xf00 [ 98.602966] vm_mmap_pgoff+0x1a6/0x3a0 [ 98.603465] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 98.604037] ksys_mmap_pgoff+0x3af/0x500 [ 98.604548] do_syscall_64+0x3f/0x90 [ 98.605028] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 98.605684] RIP: 0033:0x7f86c2b7fd82 [ 98.606144] 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 [ 98.608278] RSP: 002b:00007ffe7118ee98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 98.609189] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f86c2b7fd82 [ 98.610041] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f86c1fb9000 [ 98.610903] RBP: 00007f86c1fb9000 R08: 0000000000000009 R09: 0000000000001000 [ 98.611754] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cfec248f70 [ 98.612609] R13: 00007ffe7118eeb0 R14: 00007ffe7118eee0 R15: 00007ffe7118f240 [ 98.613464] [ 98.613755] [ 98.613971] Allocated by task 219: [ 98.614401] kasan_save_stack+0x22/0x50 [ 98.614918] kasan_set_track+0x25/0x30 [ 98.615416] __kasan_slab_alloc+0x59/0x70 [ 98.615945] kmem_cache_alloc+0x16b/0x370 [ 98.616464] vm_area_dup+0x20/0x160 [ 98.616924] __split_vma+0x170/0x950 [ 98.617398] split_vma+0xc6/0x110 [ 98.617841] mprotect_fixup+0x8d2/0xb30 [ 98.618346] do_mprotect_pkey+0x87e/0xd40 [ 98.618897] __x64_sys_mprotect+0x78/0xc0 [ 98.619420] do_syscall_64+0x3f/0x90 [ 98.619900] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 98.620543] [ 98.620763] Freed by task 219: [ 98.621157] kasan_save_stack+0x22/0x50 [ 98.621660] kasan_set_track+0x25/0x30 [ 98.622158] kasan_save_free_info+0x2b/0x50 [ 98.622701] __kasan_slab_free+0x10a/0x190 [ 98.623237] kmem_cache_free+0x10d/0x4d0 [ 98.623747] rcu_core+0x8c8/0x2860 [ 98.624197] __do_softirq+0x1b7/0x7d4 [ 98.624677] [ 98.624895] Last potentially related work creation: [ 98.625483] kasan_save_stack+0x22/0x50 [ 98.625988] __kasan_record_aux_stack+0x8e/0xa0 [ 98.626581] __call_rcu_common.constprop.0+0x6a/0xb90 [ 98.627228] remove_vma+0x139/0x170 [ 98.627706] do_vmi_align_munmap+0xd4a/0x11f0 [ 98.628269] do_vmi_munmap+0x1f1/0x2b0 [ 98.628760] __vm_munmap+0x138/0x3a0 [ 98.629229] __x64_sys_munmap+0x59/0x80 [ 98.629728] do_syscall_64+0x3f/0x90 [ 98.630207] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 98.630862] [ 98.631082] The buggy address belongs to the object at ffff88801a141e80 [ 98.631082] which belongs to the cache vm_area_struct of size 168 [ 98.632572] The buggy address is located 88 bytes inside of [ 98.632572] freed 168-byte region [ffff88801a141e80, ffff88801a141f28) [ 98.633985] [ 98.634202] The buggy address belongs to the physical page: [ 98.634869] page:0000000051b5d17f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a141 [ 98.635963] memcg:ffff88801a142001 [ 98.636397] flags: 0x100000000000200(slab|node=0|zone=1) [ 98.637045] page_type: 0xffffffff() [ 98.637502] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 98.638424] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a142001 [ 98.639360] page dumped because: kasan: bad access detected [ 98.640027] [ 98.640246] Memory state around the buggy address: [ 98.640831] ffff88801a141d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 98.641697] ffff88801a141e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 98.642564] >ffff88801a141e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 98.643421] ^ [ 98.644154] ffff88801a141f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 98.645015] ffff88801a141f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 98.645871] ================================================================== [ 98.646804] Disabling lock debugging due to kernel taint [ 101.680987] BUG: Bad rss-counter state mm:00000000dd7bcaf5 type:MM_FILEPAGES val:33 [ 101.682163] BUG: Bad rss-counter state mm:00000000dd7bcaf5 type:MM_ANONPAGES val:22 [ 102.143987] BUG: Bad rss-counter state mm:000000006483460a type:MM_FILEPAGES val:33 [ 102.145232] BUG: Bad rss-counter state mm:000000006483460a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:44798' (ECDSA) to the list of known hosts. 2023/06/20 00:55:53 fuzzer started 2023/06/20 00:55:53 dialing manager at localhost:44161 2023/06/20 00:55:53 checking machine... 2023/06/20 00:55:53 checking revisions... [ 102.856649] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:55:53 testing simple program... [ 102.905258] cgroup: Unknown subsys name 'net' [ 102.968359] cgroup: Unknown subsys name 'rlimit' executing program [ 105.909971] kmemleak: 2 new suspected memory leaks (see /sys/kernel/debug/kmemleak) executing program executing program VM DIAGNOSIS: 00:55:45 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888009ba9008 RCX=0000000000000002 RDX=0000000000000000 RSI=0000000000000000 RDI=ffffffff8560b640 RBP=0000000000000000 RSP=ffff88801682f4e0 R8 =0000000000000000 R9 =0000000000000000 R10=0000000000000001 R11=00000000000b6996 R12=0000000000000000 R13=0000000000000001 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff812d8e2a 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 00007f47a235a900 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=00007f47a2911618 CR3=000000000e858000 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=00000000000000000000000000000000 XMM01=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 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=00007ffe7dfeb798 CR3=0000000015886000 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=2032353a35353a3030203032206e754a XMM01=73732878696e755f6d6170203a5d3533 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3533325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032353a35353a3030203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000