syzkaller login: [ 39.025473] BUG: Bad rss-counter state mm:00000000ec328774 type:MM_FILEPAGES val:33 [ 39.026766] BUG: Bad rss-counter state mm:00000000ec328774 type:MM_ANONPAGES val:22 [ 39.078492] ================================================================== [ 39.079409] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.080649] Read of size 8 at addr ffff88800dfe1968 by task sshd/218 [ 39.081473] [ 39.081698] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 39.082675] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.083892] Call Trace: [ 39.084294] [ 39.084625] dump_stack_lvl+0x91/0xf0 [ 39.085118] print_report+0xcc/0x620 [ 39.085601] ? __virt_addr_valid+0x102/0x340 [ 39.086149] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.086767] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.087400] kasan_report+0xbe/0xf0 [ 39.087881] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.088801] vma_interval_tree_remove+0xc75/0xec0 [ 39.089541] vma_prepare+0xc54/0x11a0 [ 39.090110] __split_vma+0x5af/0x950 [ 39.090712] ? __pfx___split_vma+0x10/0x10 [ 39.091342] ? find_held_lock+0x2c/0x110 [ 39.091960] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.092646] ? lock_is_held_type+0x9f/0x120 [ 39.093285] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.094021] ? mtree_range_walk+0x632/0x900 [ 39.094672] ? mas_walk+0x5c7/0x7c0 [ 39.095239] do_vmi_munmap+0x1f1/0x2b0 [ 39.095823] mmap_region+0x1f9/0x2660 [ 39.096397] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.096911] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.097632] ? __pfx_lock_acquire+0x10/0x10 [ 39.098172] ? __pfx_mmap_region+0x10/0x10 [ 39.098705] ? security_mmap_addr+0x7d/0xa0 [ 39.099246] ? get_unmapped_area+0x1f5/0x3f0 [ 39.099797] do_mmap+0x854/0xf00 [ 39.100253] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.100755] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.101325] ksys_mmap_pgoff+0x3af/0x500 [ 39.101835] do_syscall_64+0x3f/0x90 [ 39.102319] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.102973] RIP: 0033:0x7fc00a3fad82 [ 39.103436] 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 [ 39.105606] RSP: 002b:00007ffe94d6b5d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.106518] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc00a3fad82 [ 39.107380] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc009834000 [ 39.108245] RBP: 00007fc009834000 R08: 0000000000000009 R09: 0000000000001000 [ 39.109120] R10: 0000000000000812 R11: 0000000000000206 R12: 00005647b9c8cec0 [ 39.109956] R13: 00007ffe94d6b5f0 R14: 00007ffe94d6b620 R15: 00007ffe94d6b980 [ 39.110805] [ 39.111096] [ 39.111319] Allocated by task 211: [ 39.111750] kasan_save_stack+0x22/0x50 [ 39.112265] kasan_set_track+0x25/0x30 [ 39.112750] __kasan_slab_alloc+0x59/0x70 [ 39.113268] kmem_cache_alloc+0x16b/0x370 [ 39.113779] vm_area_dup+0x20/0x160 [ 39.114224] __split_vma+0x170/0x950 [ 39.114693] split_vma+0xc6/0x110 [ 39.115129] mprotect_fixup+0x8d2/0xb30 [ 39.115618] do_mprotect_pkey+0x87e/0xd40 [ 39.116156] __x64_sys_mprotect+0x78/0xc0 [ 39.116680] do_syscall_64+0x3f/0x90 [ 39.117150] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.117784] [ 39.117996] Freed by task 19: [ 39.118372] kasan_save_stack+0x22/0x50 [ 39.118876] kasan_set_track+0x25/0x30 [ 39.119365] kasan_save_free_info+0x2b/0x50 [ 39.119888] __kasan_slab_free+0x10a/0x190 [ 39.120426] kmem_cache_free+0x10d/0x4d0 [ 39.120927] rcu_core+0x8c8/0x2860 [ 39.121360] __do_softirq+0x1b7/0x7d4 [ 39.121828] [ 39.122041] Last potentially related work creation: [ 39.122615] kasan_save_stack+0x22/0x50 [ 39.123114] __kasan_record_aux_stack+0x8e/0xa0 [ 39.123691] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.124329] remove_vma+0x139/0x170 [ 39.124774] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.125324] do_vmi_munmap+0x1f1/0x2b0 [ 39.125801] __vm_munmap+0x138/0x3a0 [ 39.126266] __x64_sys_munmap+0x59/0x80 [ 39.126755] do_syscall_64+0x3f/0x90 [ 39.127230] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.127863] [ 39.128089] Second to last potentially related work creation: [ 39.128767] kasan_save_stack+0x22/0x50 [ 39.129327] __kasan_record_aux_stack+0x8e/0xa0 [ 39.129894] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.130531] remove_vma+0x139/0x170 [ 39.131044] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.131580] do_vmi_munmap+0x1f1/0x2b0 [ 39.132051] mmap_region+0x1f9/0x2660 [ 39.132527] do_mmap+0x854/0xf00 [ 39.132949] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.133419] ksys_mmap_pgoff+0x3af/0x500 [ 39.133900] do_syscall_64+0x3f/0x90 [ 39.134358] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.134982] [ 39.135191] The buggy address belongs to the object at ffff88800dfe1910 [ 39.135191] which belongs to the cache vm_area_struct of size 168 [ 39.136610] The buggy address is located 88 bytes inside of [ 39.136610] freed 168-byte region [ffff88800dfe1910, ffff88800dfe19b8) [ 39.137961] [ 39.138170] The buggy address belongs to the physical page: [ 39.138810] page:000000000f95e294 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdfe1 [ 39.139849] memcg:ffff88800dfe7501 [ 39.140279] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.140895] page_type: 0xffffffff() [ 39.141330] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 39.142215] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dfe7501 [ 39.143089] page dumped because: kasan: bad access detected [ 39.143721] [ 39.143930] Memory state around the buggy address: [ 39.144497] ffff88800dfe1800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 39.145324] ffff88800dfe1880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 39.146148] >ffff88800dfe1900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.146966] ^ [ 39.147715] ffff88800dfe1980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 39.148558] ffff88800dfe1a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.149375] ================================================================== [ 39.150247] Disabling lock debugging due to kernel taint [ 41.151925] BUG: Bad rss-counter state mm:00000000a880d37d type:MM_FILEPAGES val:33 [ 41.153006] BUG: Bad rss-counter state mm:00000000a880d37d type:MM_ANONPAGES val:22 [ 41.646097] BUG: Bad rss-counter state mm:000000009ea93399 type:MM_FILEPAGES val:33 [ 41.647888] BUG: Bad rss-counter state mm:000000009ea93399 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:8928' (ECDSA) to the list of known hosts. 2023/06/21 05:23:13 fuzzer started 2023/06/21 05:23:13 dialing manager at localhost:36067 2023/06/21 05:23:13 checking machine... 2023/06/21 05:23:13 checking revisions... [ 42.254179] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:23:13 testing simple program... [ 42.302276] cgroup: Unknown subsys name 'net' [ 42.352809] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:23:13 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007fe92448f000 CR3=0000000015e2e000 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=2033313a33323a3530203132206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032313a33323a3530203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffffea00006bd640 RCX=0000000000000000 RDX=ffff8880166e51c0 RSI=ffffffff8170bb02 RDI=0000000000000007 RBP=ffffea00006bd640 RSP=ffff88801433f940 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000000 R13=000055f5cbb86000 R14=ffff888018385c28 R15=dffffc0000000000 RIP=ffffffff814c0860 RFL=00000293 [--S-A-C] 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 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=00007fe9249e0328 CR3=000000000c6ea000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000