syzkaller login: [ 31.404092] BUG: Bad rss-counter state mm:0000000023bd64ea type:MM_FILEPAGES val:33 [ 31.405311] BUG: Bad rss-counter state mm:0000000023bd64ea type:MM_ANONPAGES val:22 [ 31.484683] ================================================================== [ 31.485602] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.486545] Read of size 8 at addr ffff88800cc12798 by task sshd/220 [ 31.487323] [ 31.487543] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.488490] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.489492] Call Trace: [ 31.489820] [ 31.490117] dump_stack_lvl+0x91/0xf0 [ 31.490611] print_report+0xcc/0x620 [ 31.491107] ? __virt_addr_valid+0x102/0x340 [ 31.491663] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.492284] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.492921] kasan_report+0xbe/0xf0 [ 31.493412] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.494041] vma_interval_tree_remove+0xc75/0xec0 [ 31.494644] vma_prepare+0xc54/0x11a0 [ 31.495133] __split_vma+0x5af/0x950 [ 31.495606] ? __pfx___split_vma+0x10/0x10 [ 31.496133] ? find_held_lock+0x2c/0x110 [ 31.496670] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.497245] ? lock_is_held_type+0x9f/0x120 [ 31.497790] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.498399] ? mtree_range_walk+0x632/0x900 [ 31.498947] ? mas_walk+0x5c7/0x7c0 [ 31.499432] do_vmi_munmap+0x1f1/0x2b0 [ 31.499921] mmap_region+0x1f9/0x2660 [ 31.500402] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.500923] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.501638] ? __pfx_lock_acquire+0x10/0x10 [ 31.502177] ? __pfx_mmap_region+0x10/0x10 [ 31.502714] ? security_mmap_addr+0x7d/0xa0 [ 31.503247] ? get_unmapped_area+0x1f5/0x3f0 [ 31.503818] do_mmap+0x854/0xf00 [ 31.504271] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.504786] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.505354] ksys_mmap_pgoff+0x3af/0x500 [ 31.505861] do_syscall_64+0x3f/0x90 [ 31.506340] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.506985] RIP: 0033:0x7fdb90842d82 [ 31.507449] 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 [ 31.509604] RSP: 002b:00007ffc9ce5e308 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.510513] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdb90842d82 [ 31.511371] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdb8fc7c000 [ 31.512232] RBP: 00007fdb8fc7c000 R08: 0000000000000009 R09: 0000000000001000 [ 31.513096] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ef06cfcf60 [ 31.513941] R13: 00007ffc9ce5e320 R14: 00007ffc9ce5e350 R15: 00007ffc9ce5e6b0 [ 31.514812] [ 31.515107] [ 31.515332] Allocated by task 213: [ 31.515770] kasan_save_stack+0x22/0x50 [ 31.516280] kasan_set_track+0x25/0x30 [ 31.516806] __kasan_slab_alloc+0x59/0x70 [ 31.517330] kmem_cache_alloc+0x16b/0x370 [ 31.517852] vm_area_dup+0x20/0x160 [ 31.518309] __split_vma+0x170/0x950 [ 31.518770] split_vma+0xc6/0x110 [ 31.519211] mprotect_fixup+0x8d2/0xb30 [ 31.519721] do_mprotect_pkey+0x87e/0xd40 [ 31.520254] __x64_sys_mprotect+0x78/0xc0 [ 31.520780] do_syscall_64+0x3f/0x90 [ 31.521264] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.521904] [ 31.522119] Freed by task 213: [ 31.522514] kasan_save_stack+0x22/0x50 [ 31.523012] kasan_set_track+0x25/0x30 [ 31.523510] kasan_save_free_info+0x2b/0x50 [ 31.524050] __kasan_slab_free+0x10a/0x190 [ 31.524597] kmem_cache_free+0x10d/0x4d0 [ 31.525111] rcu_core+0x8c8/0x2860 [ 31.525553] __do_softirq+0x1b7/0x7d4 [ 31.526029] [ 31.526246] Last potentially related work creation: [ 31.526833] kasan_save_stack+0x22/0x50 [ 31.527340] __kasan_record_aux_stack+0x8e/0xa0 [ 31.527919] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.528562] remove_vma+0x139/0x170 [ 31.529021] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.529577] do_vmi_munmap+0x1f1/0x2b0 [ 31.530066] __vm_munmap+0x138/0x3a0 [ 31.530537] __x64_sys_munmap+0x59/0x80 [ 31.531034] do_syscall_64+0x3f/0x90 [ 31.531519] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.532158] [ 31.532374] Second to last potentially related work creation: [ 31.533064] kasan_save_stack+0x22/0x50 [ 31.533570] __kasan_record_aux_stack+0x8e/0xa0 [ 31.534147] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.534799] remove_vma+0x139/0x170 [ 31.535257] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.535814] do_vmi_munmap+0x1f1/0x2b0 [ 31.536299] mmap_region+0x1f9/0x2660 [ 31.536806] do_mmap+0x854/0xf00 [ 31.537237] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.537724] ksys_mmap_pgoff+0x7d/0x500 [ 31.538216] do_syscall_64+0x3f/0x90 [ 31.538689] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.539328] [ 31.539542] The buggy address belongs to the object at ffff88800cc12740 [ 31.539542] which belongs to the cache vm_area_struct of size 168 [ 31.541028] The buggy address is located 88 bytes inside of [ 31.541028] freed 168-byte region [ffff88800cc12740, ffff88800cc127e8) [ 31.542435] [ 31.542654] The buggy address belongs to the physical page: [ 31.543311] page:00000000588e2524 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcc12 [ 31.544401] memcg:ffff88800c85a301 [ 31.544870] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.545600] page_type: 0xffffffff() [ 31.546084] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 31.547050] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c85a301 [ 31.548001] page dumped because: kasan: bad access detected [ 31.548713] [ 31.548935] Memory state around the buggy address: [ 31.549560] ffff88800cc12680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.550479] ffff88800cc12700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.551390] >ffff88800cc12780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.552300] ^ [ 31.552828] ffff88800cc12800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 31.553732] ffff88800cc12880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 31.554629] ================================================================== [ 31.555760] Disabling lock debugging due to kernel taint [ 33.838029] BUG: Bad rss-counter state mm:000000009da44332 type:MM_FILEPAGES val:33 [ 33.839226] BUG: Bad rss-counter state mm:000000009da44332 type:MM_ANONPAGES val:22 [ 34.283191] BUG: Bad rss-counter state mm:000000000b7e7755 type:MM_FILEPAGES val:33 [ 34.284368] BUG: Bad rss-counter state mm:000000000b7e7755 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:2878' (ECDSA) to the list of known hosts. 2023/06/20 19:02:31 fuzzer started 2023/06/20 19:02:31 dialing manager at localhost:36067 2023/06/20 19:02:31 checking machine... 2023/06/20 19:02:31 checking revisions... [ 34.992070] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:02:31 testing simple program... [ 35.040177] cgroup: Unknown subsys name 'net' [ 35.077759] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:02:31 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=00007f12bf209320 CR3=000000000d8b6000 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=a504b543ce41d580e947c4995b58a189 XMM02=000000000011b4c0ec2efd57dc4c00df XMM03=00000000001229a0ea23e8bb4c25b689 XMM04=aa3eb755c5e48c8300000000000ae988 XMM05=2bef104942e5d45c00000000001349a0 XMM06=4fda316b135da52b0000000000133a40 XMM07=e042d86d42eb936e0000000000122c20 XMM08=ea23e8bb4c25b689000000000011b520 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=fffffbfff0ba7a6a RBX=0000000000000001 RCX=ffffffff812d86ea RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=fffffbfff0ba7a6a RSP=ffff888016d87420 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000a9500000a95 R12=ffffffff8560b640 R13=ffffffff83ab1b1f R14=dffffc0000000000 R15=ffffffff87f97640 RIP=ffffffff8180f09a RFL=00000286 [--S--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 00007fe92af32900 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=00007ffc41667000 CR3=000000000947e000 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=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