syzkaller login: [ 30.440278] BUG: Bad rss-counter state mm:000000001c80124f type:MM_FILEPAGES val:33 [ 30.442728] BUG: Bad rss-counter state mm:000000001c80124f type:MM_ANONPAGES val:22 [ 30.657608] ================================================================== [ 30.658203] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.662782] Read of size 8 at addr ffff88800cb1fc20 by task sshd/221 [ 30.663263] [ 30.663402] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.663984] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.664618] Call Trace: [ 30.664830] [ 30.665020] dump_stack_lvl+0x91/0xf0 [ 30.665346] print_report+0xcc/0x620 [ 30.665667] ? __virt_addr_valid+0x102/0x340 [ 30.666029] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.666435] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.666866] kasan_report+0xbe/0xf0 [ 30.667180] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.667587] vma_interval_tree_remove+0xc75/0xec0 [ 30.667981] vma_prepare+0xc54/0x11a0 [ 30.668296] __split_vma+0x5af/0x950 [ 30.668606] ? __pfx___split_vma+0x10/0x10 [ 30.668961] ? find_held_lock+0x2c/0x110 [ 30.669302] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.669669] ? lock_is_held_type+0x9f/0x120 [ 30.670021] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.670415] ? mtree_range_walk+0x632/0x900 [ 30.670807] ? mas_walk+0x5c7/0x7c0 [ 30.671121] do_vmi_munmap+0x1f1/0x2b0 [ 30.671444] mmap_region+0x1f9/0x2660 [ 30.671760] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.672095] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.672556] ? __pfx_lock_acquire+0x10/0x10 [ 30.672901] ? __pfx_mmap_region+0x10/0x10 [ 30.673245] ? security_mmap_addr+0x7d/0xa0 [ 30.673590] ? get_unmapped_area+0x1f5/0x3f0 [ 30.673935] do_mmap+0x854/0xf00 [ 30.674221] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.674540] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.674934] ksys_mmap_pgoff+0x3af/0x500 [ 30.675267] do_syscall_64+0x3f/0x90 [ 30.675584] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.676011] RIP: 0033:0x7fc4e3142d82 [ 30.676312] 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 [ 30.677697] RSP: 002b:00007fff7bcb08f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.678287] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc4e3142d82 [ 30.678866] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc4e257c000 [ 30.679419] RBP: 00007fc4e257c000 R08: 0000000000000009 R09: 0000000000001000 [ 30.679968] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c6389e3980 [ 30.680511] R13: 00007fff7bcb0910 R14: 00007fff7bcb0940 R15: 00007fff7bcb0ca0 [ 30.681067] [ 30.681258] [ 30.681398] Allocated by task 212: [ 30.681678] kasan_save_stack+0x22/0x50 [ 30.682008] kasan_set_track+0x25/0x30 [ 30.682329] __kasan_slab_alloc+0x59/0x70 [ 30.682696] kmem_cache_alloc+0x16b/0x370 [ 30.683045] vm_area_dup+0x20/0x160 [ 30.683342] __split_vma+0x170/0x950 [ 30.683647] split_vma+0xc6/0x110 [ 30.683938] mprotect_fixup+0x8d2/0xb30 [ 30.684260] do_mprotect_pkey+0x87e/0xd40 [ 30.684592] __x64_sys_mprotect+0x78/0xc0 [ 30.684929] do_syscall_64+0x3f/0x90 [ 30.685244] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.685669] [ 30.685811] Freed by task 19: [ 30.686062] kasan_save_stack+0x22/0x50 [ 30.686394] kasan_set_track+0x25/0x30 [ 30.686735] kasan_save_free_info+0x2b/0x50 [ 30.687100] __kasan_slab_free+0x10a/0x190 [ 30.687456] kmem_cache_free+0x10d/0x4d0 [ 30.687794] rcu_core+0x8c8/0x2860 [ 30.688091] __do_softirq+0x1b7/0x7d4 [ 30.688408] [ 30.688552] Last potentially related work creation: [ 30.688935] kasan_save_stack+0x22/0x50 [ 30.689267] __kasan_record_aux_stack+0x8e/0xa0 [ 30.689641] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.690070] remove_vma+0x139/0x170 [ 30.690366] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.690751] do_vmi_munmap+0x1f1/0x2b0 [ 30.691076] __vm_munmap+0x138/0x3a0 [ 30.691380] __x64_sys_munmap+0x59/0x80 [ 30.691704] do_syscall_64+0x3f/0x90 [ 30.692015] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.692431] [ 30.692571] The buggy address belongs to the object at ffff88800cb1fbc8 [ 30.692571] which belongs to the cache vm_area_struct of size 168 [ 30.693516] The buggy address is located 88 bytes inside of [ 30.693516] freed 168-byte region [ffff88800cb1fbc8, ffff88800cb1fc70) [ 30.694432] [ 30.694575] The buggy address belongs to the physical page: [ 30.695037] page:00000000597caaca refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcb1f [ 30.695734] memcg:ffff88800e5a4901 [ 30.696010] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.696415] page_type: 0xffffffff() [ 30.696709] raw: 0100000000000200 ffff8880087a0c80 ffffea00003ae980 dead000000000006 [ 30.697304] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e5a4901 [ 30.697913] page dumped because: kasan: bad access detected [ 30.698352] [ 30.698503] Memory state around the buggy address: [ 30.698919] ffff88800cb1fb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.699484] ffff88800cb1fb80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.700043] >ffff88800cb1fc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.700600] ^ [ 30.700952] ffff88800cb1fc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.701520] ffff88800cb1fd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.702086] ================================================================== [ 30.703132] Disabling lock debugging due to kernel taint [ 35.475830] BUG: Bad rss-counter state mm:00000000b894e7c3 type:MM_FILEPAGES val:33 [ 35.476470] BUG: Bad rss-counter state mm:00000000b894e7c3 type:MM_ANONPAGES val:22 [ 36.727481] BUG: Bad rss-counter state mm:00000000f3b3433a type:MM_FILEPAGES val:33 [ 36.729057] BUG: Bad rss-counter state mm:00000000f3b3433a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:53189' (ECDSA) to the list of known hosts. 2023/06/21 08:19:25 fuzzer started 2023/06/21 08:19:25 dialing manager at localhost:36067 2023/06/21 08:19:25 checking machine... 2023/06/21 08:19:25 checking revisions... [ 37.550073] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:19:25 testing simple program... [ 37.600259] cgroup: Unknown subsys name 'net' [ 37.640600] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:19:25 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000000 RCX=ffffffff813acfa3 RDX=fffffbfff0f6d805 RSI=0000000000000008 RDI=ffffffff87b6c020 RBP=ffffffff85407d68 RSP=ffff88806ce09df8 R8 =0000000000000000 R9 =fffffbfff0f6d804 R10=ffffffff87b6c027 R11=000000194733b69c R12=0000000000000001 R13=ffff88806ce2c240 R14=ffffffff85407d68 R15=dffffc0000000000 RIP=ffffffff813acfab RFL=00000046 [---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 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=00005563a4f794d0 CR3=000000000e51c000 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=ffffffffffff00000000000000000000 XMM02=ffffffffffff00000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000073707574726174732064 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=dffffc0000000000 RCX=0000000000000000 RDX=ffff8880158551c0 RSI=ffffffff81ef7198 RDI=ffff88800dc684a0 RBP=0000000000000001 RSP=ffff88801cd6f698 R8 =0000000000000002 R9 =000000000000000a R10=000000000000002b R11=0000000000000001 R12=ffff888008cce618 R13=000000000000000a R14=0000000000000005 R15=0000000000000001 RIP=ffffffff81ef71b3 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 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=00007f7e4ec40269 CR3=000000000d88c000 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=756e696c2d34365f3638782f62696c2f XMM01=2e6f732e6c736e62696c2f756e672d78 XMM02=00322e6f732e6c736e62696c2f756e67 XMM03=2d78756e696c2d34365f3638782f6269 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000