syzkaller login: [ 30.751276] BUG: Bad rss-counter state mm:00000000b13950b4 type:MM_FILEPAGES val:33 [ 30.752359] BUG: Bad rss-counter state mm:00000000b13950b4 type:MM_ANONPAGES val:22 [ 30.908165] ================================================================== [ 30.909090] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.910047] Read of size 8 at addr ffff88801a20e798 by task sshd/219 [ 30.910821] [ 30.911046] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.912054] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.913040] Call Trace: [ 30.913364] [ 30.913654] dump_stack_lvl+0x91/0xf0 [ 30.914177] print_report+0xcc/0x620 [ 30.914668] ? __virt_addr_valid+0x102/0x340 [ 30.915220] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.915840] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.916461] kasan_report+0xbe/0xf0 [ 30.916942] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.917557] vma_interval_tree_remove+0xc75/0xec0 [ 30.918185] vma_prepare+0xc54/0x11a0 [ 30.918663] __split_vma+0x5af/0x950 [ 30.919133] ? __pfx___split_vma+0x10/0x10 [ 30.919664] ? find_held_lock+0x2c/0x110 [ 30.920193] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.920757] ? lock_is_held_type+0x9f/0x120 [ 30.921299] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.921902] ? mtree_range_walk+0x632/0x900 [ 30.922464] ? mas_walk+0x5c7/0x7c0 [ 30.922944] do_vmi_munmap+0x1f1/0x2b0 [ 30.923437] mmap_region+0x1f9/0x2660 [ 30.923918] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.924430] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.925154] ? __pfx_lock_acquire+0x10/0x10 [ 30.925692] ? __pfx_mmap_region+0x10/0x10 [ 30.926248] ? security_mmap_addr+0x7d/0xa0 [ 30.926793] ? get_unmapped_area+0x1f5/0x3f0 [ 30.927350] do_mmap+0x854/0xf00 [ 30.927794] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.928291] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.928853] ksys_mmap_pgoff+0x3af/0x500 [ 30.929357] do_syscall_64+0x3f/0x90 [ 30.929834] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.930499] RIP: 0033:0x7fe2c86c7d82 [ 30.930964] 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 [ 30.933082] RSP: 002b:00007ffc06d24718 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.933984] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe2c86c7d82 [ 30.934838] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe2c7b01000 [ 30.935687] RBP: 00007fe2c7b01000 R08: 0000000000000009 R09: 0000000000001000 [ 30.936539] R10: 0000000000000812 R11: 0000000000000206 R12: 000056213cf19f70 [ 30.937378] R13: 00007ffc06d24730 R14: 00007ffc06d24760 R15: 00007ffc06d24ac0 [ 30.938244] [ 30.938539] [ 30.938756] Allocated by task 212: [ 30.939185] kasan_save_stack+0x22/0x50 [ 30.939688] kasan_set_track+0x25/0x30 [ 30.940190] __kasan_slab_alloc+0x59/0x70 [ 30.940721] kmem_cache_alloc+0x16b/0x370 [ 30.941237] vm_area_dup+0x20/0x160 [ 30.941695] __split_vma+0x170/0x950 [ 30.942186] split_vma+0xc6/0x110 [ 30.942635] mprotect_fixup+0x8d2/0xb30 [ 30.943135] do_mprotect_pkey+0x87e/0xd40 [ 30.943653] __x64_sys_mprotect+0x78/0xc0 [ 30.944170] do_syscall_64+0x3f/0x90 [ 30.944647] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.945297] [ 30.945511] Freed by task 212: [ 30.945899] kasan_save_stack+0x22/0x50 [ 30.946413] kasan_set_track+0x25/0x30 [ 30.946906] kasan_save_free_info+0x2b/0x50 [ 30.947448] __kasan_slab_free+0x10a/0x190 [ 30.947983] kmem_cache_free+0x10d/0x4d0 [ 30.948490] rcu_core+0x8c8/0x2860 [ 30.948931] __do_softirq+0x1b7/0x7d4 [ 30.949411] [ 30.949632] Last potentially related work creation: [ 30.950248] kasan_save_stack+0x22/0x50 [ 30.950763] __kasan_record_aux_stack+0x8e/0xa0 [ 30.951343] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.952001] remove_vma+0x139/0x170 [ 30.952470] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.953035] do_vmi_munmap+0x1f1/0x2b0 [ 30.953544] __vm_munmap+0x138/0x3a0 [ 30.954018] __x64_sys_munmap+0x59/0x80 [ 30.954532] do_syscall_64+0x3f/0x90 [ 30.955020] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.955670] [ 30.955886] The buggy address belongs to the object at ffff88801a20e740 [ 30.955886] which belongs to the cache vm_area_struct of size 168 [ 30.957389] The buggy address is located 88 bytes inside of [ 30.957389] freed 168-byte region [ffff88801a20e740, ffff88801a20e7e8) [ 30.958838] [ 30.959061] The buggy address belongs to the physical page: [ 30.959722] page:000000009863d46d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a20e [ 30.960841] memcg:ffff888009647d01 [ 30.961273] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.961927] page_type: 0xffffffff() [ 30.962395] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 30.963334] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009647d01 [ 30.964263] page dumped because: kasan: bad access detected [ 30.964962] [ 30.965184] Memory state around the buggy address: [ 30.965758] ffff88801a20e680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.966628] ffff88801a20e700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.967478] >ffff88801a20e780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.968330] ^ [ 30.968825] ffff88801a20e800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.969679] ffff88801a20e880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.970562] ================================================================== [ 30.971539] Disabling lock debugging due to kernel taint [ 33.536865] BUG: Bad rss-counter state mm:000000001b81a9d4 type:MM_FILEPAGES val:33 [ 33.537883] BUG: Bad rss-counter state mm:000000001b81a9d4 type:MM_ANONPAGES val:22 [ 34.091864] BUG: Bad rss-counter state mm:00000000ca920576 type:MM_FILEPAGES val:33 [ 34.093044] BUG: Bad rss-counter state mm:00000000ca920576 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:49397' (ECDSA) to the list of known hosts. 2023/06/19 22:46:45 fuzzer started 2023/06/19 22:46:45 dialing manager at localhost:44161 2023/06/19 22:46:45 checking machine... 2023/06/19 22:46:45 checking revisions... [ 34.729468] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:46:45 testing simple program... [ 34.789791] cgroup: Unknown subsys name 'net' [ 34.841816] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:46:44 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007fce20d53000 CR3=0000000013a54000 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=75d108a0f298ca879049e44d3e5b8282 XMM02=2c67c8bc2e329bc3000000000011d4d8 XMM03=fb795ef6d65770560000000000124280 XMM04=4a76efa3015fb7a400000000000ae988 XMM05=dfcdbad4f1609c370000000000133e08 XMM06=4550c0f3fa666b720000000000132c70 XMM07=e042d86d42eb936e0000000000124500 XMM08=8cf58438fcf43746000000000011d538 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=00007fc0415c6618 CR3=0000000019e40000 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=2034343a36343a3232203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034343a36343a3232203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000