syzkaller login: [ 30.323378] BUG: Bad rss-counter state mm:00000000fe96e9ee type:MM_FILEPAGES val:33 [ 30.324471] BUG: Bad rss-counter state mm:00000000fe96e9ee type:MM_ANONPAGES val:22 [ 30.500727] ================================================================== [ 30.501774] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.502948] Read of size 8 at addr ffff8880164d9b38 by task sshd/220 [ 30.503808] [ 30.504054] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.505037] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.506136] Call Trace: [ 30.506500] [ 30.506856] dump_stack_lvl+0x91/0xf0 [ 30.507422] print_report+0xcc/0x620 [ 30.507974] ? __virt_addr_valid+0x102/0x340 [ 30.508603] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.509315] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.510061] kasan_report+0xbe/0xf0 [ 30.510625] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.511408] vma_interval_tree_remove+0xc75/0xec0 [ 30.512108] vma_prepare+0xc54/0x11a0 [ 30.512672] __split_vma+0x5af/0x950 [ 30.513224] ? __pfx___split_vma+0x10/0x10 [ 30.513874] ? find_held_lock+0x2c/0x110 [ 30.514476] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.515179] ? lock_is_held_type+0x9f/0x120 [ 30.515815] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.516521] ? mtree_range_walk+0x632/0x900 [ 30.517160] ? mas_walk+0x5c7/0x7c0 [ 30.517728] do_vmi_munmap+0x1f1/0x2b0 [ 30.518295] mmap_region+0x1f9/0x2660 [ 30.518899] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.519508] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.520347] ? __pfx_lock_acquire+0x10/0x10 [ 30.520971] ? __pfx_mmap_region+0x10/0x10 [ 30.521602] ? security_mmap_addr+0x7d/0xa0 [ 30.522225] ? get_unmapped_area+0x1f5/0x3f0 [ 30.522899] do_mmap+0x854/0xf00 [ 30.523418] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.523984] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.524635] ksys_mmap_pgoff+0x3af/0x500 [ 30.525224] do_syscall_64+0x3f/0x90 [ 30.525815] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.526575] RIP: 0033:0x7f3a71c88d82 [ 30.527160] 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 [ 30.529661] RSP: 002b:00007ffc6e2ffc88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.530712] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3a71c88d82 [ 30.531752] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3a710c2000 [ 30.532737] RBP: 00007f3a710c2000 R08: 0000000000000009 R09: 0000000000001000 [ 30.533755] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555c34782b20 [ 30.534741] R13: 00007ffc6e2ffca0 R14: 00007ffc6e2ffcd0 R15: 00007ffc6e300030 [ 30.535781] [ 30.536122] [ 30.536368] Allocated by task 213: [ 30.536867] kasan_save_stack+0x22/0x50 [ 30.537452] kasan_set_track+0x25/0x30 [ 30.538032] __kasan_slab_alloc+0x59/0x70 [ 30.538634] kmem_cache_alloc+0x16b/0x370 [ 30.539262] vm_area_dup+0x20/0x160 [ 30.539789] __split_vma+0x170/0x950 [ 30.540322] split_vma+0xc6/0x110 [ 30.540828] mprotect_fixup+0x8d2/0xb30 [ 30.541401] do_mprotect_pkey+0x87e/0xd40 [ 30.542011] __x64_sys_mprotect+0x78/0xc0 [ 30.542607] do_syscall_64+0x3f/0x90 [ 30.543203] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.543941] [ 30.544189] Freed by task 213: [ 30.544644] kasan_save_stack+0x22/0x50 [ 30.545219] kasan_set_track+0x25/0x30 [ 30.545813] kasan_save_free_info+0x2b/0x50 [ 30.546429] __kasan_slab_free+0x10a/0x190 [ 30.547074] kmem_cache_free+0x10d/0x4d0 [ 30.547664] rcu_core+0x8c8/0x2860 [ 30.548170] __do_softirq+0x1b7/0x7d4 [ 30.548726] [ 30.548972] Last potentially related work creation: [ 30.549659] kasan_save_stack+0x22/0x50 [ 30.550236] __kasan_record_aux_stack+0x8e/0xa0 [ 30.550934] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.551679] remove_vma+0x139/0x170 [ 30.552207] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.552844] do_vmi_munmap+0x1f1/0x2b0 [ 30.553402] __vm_munmap+0x138/0x3a0 [ 30.553960] __x64_sys_munmap+0x59/0x80 [ 30.554537] do_syscall_64+0x3f/0x90 [ 30.555123] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.555866] [ 30.556111] The buggy address belongs to the object at ffff8880164d9ae0 [ 30.556111] which belongs to the cache vm_area_struct of size 168 [ 30.557828] The buggy address is located 88 bytes inside of [ 30.557828] freed 168-byte region [ffff8880164d9ae0, ffff8880164d9b88) [ 30.559490] [ 30.559740] The buggy address belongs to the physical page: [ 30.560494] page:000000003b23a5bf refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x164d9 [ 30.561763] memcg:ffff88800e499801 [ 30.562247] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.563034] page_type: 0xffffffff() [ 30.563547] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.564592] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e499801 [ 30.565637] page dumped because: kasan: bad access detected [ 30.566402] [ 30.566648] Memory state around the buggy address: [ 30.567358] ffff8880164d9a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.568335] ffff8880164d9a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 30.569308] >ffff8880164d9b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.570297] ^ [ 30.571039] ffff8880164d9b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.572016] ffff8880164d9c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.572978] ================================================================== [ 30.574132] Disabling lock debugging due to kernel taint [ 32.613578] BUG: Bad rss-counter state mm:00000000e3edc75b type:MM_FILEPAGES val:33 [ 32.614760] BUG: Bad rss-counter state mm:00000000e3edc75b type:MM_ANONPAGES val:22 [ 32.992506] BUG: Bad rss-counter state mm:000000009e806214 type:MM_FILEPAGES val:33 [ 32.993513] BUG: Bad rss-counter state mm:000000009e806214 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:33215' (ECDSA) to the list of known hosts. 2023/06/21 00:58:12 fuzzer started 2023/06/21 00:58:12 dialing manager at localhost:36067 2023/06/21 00:58:12 checking machine... 2023/06/21 00:58:12 checking revisions... [ 33.719661] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:58:12 testing simple program... [ 33.771809] cgroup: Unknown subsys name 'net' [ 33.806824] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:58:12 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff8880099eb488 RCX=0000000000000000 RDX=1ffff11002b65a11 RSI=ffffffff814526db RDI=0000000000000001 RBP=dffffc0000000000 RSP=ffff888014647ce8 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=00000000000b6a61 R12=ffff888015b2d000 R13=ffff88801007b680 R14=ffff888016564000 R15=0000000000000001 RIP=ffffffff814c0860 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 00007fae9fdf4900 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=00007ffd396fe000 CR3=000000000c572000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 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=00007f415af4bb80 CR3=000000000cc24000 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=1773f0f4ede74f8eac4c8bdde917e3be XMM02=2c67c8bc2e329bc3000000000011a278 XMM03=fb795ef6d657705600000000001218a8 XMM04=e87837bd400045c000000000000ae988 XMM05=19e9129bd510f2350000000000131948 XMM06=ce4bde64f77c4fb000000000001307b0 XMM07=e042d86d42eb936e0000000000121b28 XMM08=d44ccaf4fc6b5b13000000000011a2d8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000