syzkaller login: [ 33.023928] BUG: Bad rss-counter state mm:00000000123383bc type:MM_FILEPAGES val:33 [ 33.025167] BUG: Bad rss-counter state mm:00000000123383bc type:MM_ANONPAGES val:22 [ 33.059763] ================================================================== [ 33.060731] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.061675] Read of size 8 at addr ffff88800f691140 by task sshd/220 [ 33.062528] [ 33.062747] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.063601] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.064604] Call Trace: [ 33.064932] [ 33.065216] dump_stack_lvl+0x91/0xf0 [ 33.065704] print_report+0xcc/0x620 [ 33.066191] ? __virt_addr_valid+0x102/0x340 [ 33.066744] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.067353] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.067969] kasan_report+0xbe/0xf0 [ 33.068446] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.069078] vma_interval_tree_remove+0xc75/0xec0 [ 33.069685] vma_prepare+0xc54/0x11a0 [ 33.070163] __split_vma+0x5af/0x950 [ 33.070633] ? __pfx___split_vma+0x10/0x10 [ 33.071162] ? find_held_lock+0x2c/0x110 [ 33.071682] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.072244] ? lock_is_held_type+0x9f/0x120 [ 33.072803] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.073410] ? mtree_range_walk+0x632/0x900 [ 33.073962] ? mas_walk+0x5c7/0x7c0 [ 33.074434] do_vmi_munmap+0x1f1/0x2b0 [ 33.074923] mmap_region+0x1f9/0x2660 [ 33.075399] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.075913] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.076621] ? __pfx_lock_acquire+0x10/0x10 [ 33.077161] ? __pfx_mmap_region+0x10/0x10 [ 33.077683] ? security_mmap_addr+0x7d/0xa0 [ 33.078215] ? get_unmapped_area+0x1f5/0x3f0 [ 33.078762] do_mmap+0x854/0xf00 [ 33.079201] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.079692] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.080253] ksys_mmap_pgoff+0x3af/0x500 [ 33.080765] do_syscall_64+0x3f/0x90 [ 33.081241] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.081884] RIP: 0033:0x7f5b7e8fbd82 [ 33.082338] 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 [ 33.084477] RSP: 002b:00007ffe7f7af4f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.085404] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5b7e8fbd82 [ 33.086252] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5b7dd35000 [ 33.087112] RBP: 00007f5b7dd35000 R08: 0000000000000009 R09: 0000000000001000 [ 33.087967] R10: 0000000000000812 R11: 0000000000000206 R12: 00005570ec9faec0 [ 33.088829] R13: 00007ffe7f7af510 R14: 00007ffe7f7af540 R15: 00007ffe7f7af8a0 [ 33.089700] [ 33.090003] [ 33.090223] Allocated by task 213: [ 33.090649] kasan_save_stack+0x22/0x50 [ 33.091147] kasan_set_track+0x25/0x30 [ 33.091643] __kasan_slab_alloc+0x59/0x70 [ 33.092175] kmem_cache_alloc+0x16b/0x370 [ 33.092692] vm_area_dup+0x20/0x160 [ 33.093170] __split_vma+0x170/0x950 [ 33.093637] split_vma+0xc6/0x110 [ 33.094078] mprotect_fixup+0x8d2/0xb30 [ 33.094585] do_mprotect_pkey+0x87e/0xd40 [ 33.095113] __x64_sys_mprotect+0x78/0xc0 [ 33.095632] do_syscall_64+0x3f/0x90 [ 33.096108] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.096754] [ 33.096968] Freed by task 213: [ 33.097359] kasan_save_stack+0x22/0x50 [ 33.097862] kasan_set_track+0x25/0x30 [ 33.098352] kasan_save_free_info+0x2b/0x50 [ 33.098886] __kasan_slab_free+0x10a/0x190 [ 33.099420] kmem_cache_free+0x10d/0x4d0 [ 33.099929] rcu_core+0x8c8/0x2860 [ 33.100372] __do_softirq+0x1b7/0x7d4 [ 33.100867] [ 33.101081] Last potentially related work creation: [ 33.101658] kasan_save_stack+0x22/0x50 [ 33.102166] __kasan_record_aux_stack+0x8e/0xa0 [ 33.102739] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.103398] remove_vma+0x139/0x170 [ 33.103850] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.104415] do_vmi_munmap+0x1f1/0x2b0 [ 33.104914] __vm_munmap+0x138/0x3a0 [ 33.105382] __x64_sys_munmap+0x59/0x80 [ 33.105872] do_syscall_64+0x3f/0x90 [ 33.106344] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.106986] [ 33.107200] The buggy address belongs to the object at ffff88800f6910e8 [ 33.107200] which belongs to the cache vm_area_struct of size 168 [ 33.108651] The buggy address is located 88 bytes inside of [ 33.108651] freed 168-byte region [ffff88800f6910e8, ffff88800f691190) [ 33.110041] [ 33.110255] The buggy address belongs to the physical page: [ 33.110912] page:00000000766f6339 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf691 [ 33.111978] memcg:ffff888017c0ab01 [ 33.112403] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.113097] page_type: 0xffffffff() [ 33.113549] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 33.114469] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888017c0ab01 [ 33.115376] page dumped because: kasan: bad access detected [ 33.116035] [ 33.116252] Memory state around the buggy address: [ 33.116839] ffff88800f691000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.117716] ffff88800f691080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 33.118646] >ffff88800f691100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.119521] ^ [ 33.120174] ffff88800f691180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 33.121073] ffff88800f691200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 33.121942] ================================================================== [ 33.123025] Disabling lock debugging due to kernel taint [ 34.895415] BUG: Bad rss-counter state mm:000000005b9eadb6 type:MM_FILEPAGES val:33 [ 34.896211] BUG: Bad rss-counter state mm:000000005b9eadb6 type:MM_ANONPAGES val:22 [ 35.473474] BUG: Bad rss-counter state mm:0000000069287391 type:MM_FILEPAGES val:33 [ 35.474655] BUG: Bad rss-counter state mm:0000000069287391 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:65533' (ECDSA) to the list of known hosts. 2023/06/20 07:35:34 fuzzer started 2023/06/20 07:35:34 dialing manager at localhost:44161 2023/06/20 07:35:34 checking machine... 2023/06/20 07:35:34 checking revisions... [ 36.109740] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:35:34 testing simple program... [ 36.173484] cgroup: Unknown subsys name 'net' [ 36.210024] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:35:32 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=00000000000002f1 RCX=1ffff11001eb3326 RDX=1ffff11002110682 RSI=ffffffff81f3c075 RDI=ffff8880097c7bdc RBP=ffff8880097c7bd8 RSP=ffff8880097c7a50 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000008000 R11=0000000000000000 R12=ffff888010883410 R13=0000000000007fff R14=00000000000002f1 R15=000000000000002b RIP=ffffffff81f3c1ec 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 00007f5b84292900 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=00007ffee17ac000 CR3=00000000097ec000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 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=00007fc9d7da0000 CR3=000000000f3be000 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=f06b9a96f1069db5964a37f83c650d85 XMM02=ec2efd57dc4c00df000000000011f048 XMM03=1f6f6144d696a777000000000011f118 XMM04=11e285f2a157d02b00000000000ae988 XMM05=7b307c2afaa7453700000000001367c8 XMM06=00c3ffa147b8d8570000000000135868 XMM07=e042d86d42eb936e00000000001267c8 XMM08=1f6f6144d696a777000000000011f118 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000