syzkaller login: [ 36.731588] BUG: Bad rss-counter state mm:0000000056ea6d75 type:MM_FILEPAGES val:33 [ 36.732820] BUG: Bad rss-counter state mm:0000000056ea6d75 type:MM_ANONPAGES val:22 [ 36.773635] ================================================================== [ 36.774679] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.775742] Read of size 8 at addr ffff888013a08df0 by task sshd/219 [ 36.776557] [ 36.776791] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.777739] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.778781] Call Trace: [ 36.779127] [ 36.779432] dump_stack_lvl+0x91/0xf0 [ 36.779950] print_report+0xcc/0x620 [ 36.780462] ? __virt_addr_valid+0x102/0x340 [ 36.781044] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.781695] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.782364] kasan_report+0xbe/0xf0 [ 36.782880] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.783539] vma_interval_tree_remove+0xc75/0xec0 [ 36.784187] vma_prepare+0xc54/0x11a0 [ 36.784700] __split_vma+0x5af/0x950 [ 36.785205] ? __pfx___split_vma+0x10/0x10 [ 36.785763] ? find_held_lock+0x2c/0x110 [ 36.786335] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.786927] ? lock_is_held_type+0x9f/0x120 [ 36.787502] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.788147] ? mtree_range_walk+0x632/0x900 [ 36.788738] ? mas_walk+0x5c7/0x7c0 [ 36.789246] do_vmi_munmap+0x1f1/0x2b0 [ 36.789779] mmap_region+0x1f9/0x2660 [ 36.790304] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.790849] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.791618] ? __pfx_lock_acquire+0x10/0x10 [ 36.792180] ? __pfx_mmap_region+0x10/0x10 [ 36.792743] ? security_mmap_addr+0x7d/0xa0 [ 36.793323] ? get_unmapped_area+0x1f5/0x3f0 [ 36.793940] do_mmap+0x854/0xf00 [ 36.794423] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.794948] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.795553] ksys_mmap_pgoff+0x3af/0x500 [ 36.796095] do_syscall_64+0x3f/0x90 [ 36.796605] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.797287] RIP: 0033:0x7fb427455d82 [ 36.797775] 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 [ 36.800042] RSP: 002b:00007fffb5ba5268 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.801017] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb427455d82 [ 36.801936] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb42688f000 [ 36.802860] RBP: 00007fb42688f000 R08: 0000000000000009 R09: 0000000000001000 [ 36.803769] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cf0b830ec0 [ 36.804674] R13: 00007fffb5ba5280 R14: 00007fffb5ba52b0 R15: 00007fffb5ba5610 [ 36.805615] [ 36.805941] [ 36.806172] Allocated by task 212: [ 36.806636] kasan_save_stack+0x22/0x50 [ 36.807182] kasan_set_track+0x25/0x30 [ 36.807701] __kasan_slab_alloc+0x59/0x70 [ 36.808267] kmem_cache_alloc+0x16b/0x370 [ 36.808810] vm_area_dup+0x20/0x160 [ 36.809287] __split_vma+0x170/0x950 [ 36.809784] split_vma+0xc6/0x110 [ 36.810275] mprotect_fixup+0x8d2/0xb30 [ 36.810808] do_mprotect_pkey+0x87e/0xd40 [ 36.811365] __x64_sys_mprotect+0x78/0xc0 [ 36.811926] do_syscall_64+0x3f/0x90 [ 36.812433] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.813121] [ 36.813350] Freed by task 212: [ 36.813783] kasan_save_stack+0x22/0x50 [ 36.814343] kasan_set_track+0x25/0x30 [ 36.814874] kasan_save_free_info+0x2b/0x50 [ 36.815442] __kasan_slab_free+0x10a/0x190 [ 36.816013] kmem_cache_free+0x10d/0x4d0 [ 36.816558] rcu_core+0x8c8/0x2860 [ 36.817036] __do_softirq+0x1b7/0x7d4 [ 36.817541] [ 36.817775] Last potentially related work creation: [ 36.818424] kasan_save_stack+0x22/0x50 [ 36.818965] __kasan_record_aux_stack+0x8e/0xa0 [ 36.819579] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.820255] remove_vma+0x139/0x170 [ 36.820739] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.821330] do_vmi_munmap+0x1f1/0x2b0 [ 36.821840] __vm_munmap+0x138/0x3a0 [ 36.822354] __x64_sys_munmap+0x59/0x80 [ 36.822880] do_syscall_64+0x3f/0x90 [ 36.823389] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.824093] [ 36.824331] The buggy address belongs to the object at ffff888013a08d98 [ 36.824331] which belongs to the cache vm_area_struct of size 168 [ 36.825970] The buggy address is located 88 bytes inside of [ 36.825970] freed 168-byte region [ffff888013a08d98, ffff888013a08e40) [ 36.827554] [ 36.827792] The buggy address belongs to the physical page: [ 36.828523] page:000000001d233de0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x13a08 [ 36.829736] memcg:ffff8880198cba01 [ 36.830213] flags: 0x100000000000200(slab|node=0|zone=1) [ 36.830933] page_type: 0xffffffff() [ 36.831435] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 36.832450] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880198cba01 [ 36.833469] page dumped because: kasan: bad access detected [ 36.834210] [ 36.834444] Memory state around the buggy address: [ 36.835087] ffff888013a08c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 36.836045] ffff888013a08d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 36.836992] >ffff888013a08d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 36.837961] ^ [ 36.838855] ffff888013a08e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 36.839809] ffff888013a08e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.840740] ================================================================== [ 36.841943] Disabling lock debugging due to kernel taint [ 38.270847] BUG: Bad rss-counter state mm:00000000bf7e62ea type:MM_FILEPAGES val:33 [ 38.272137] BUG: Bad rss-counter state mm:00000000bf7e62ea type:MM_ANONPAGES val:22 [ 38.741240] BUG: Bad rss-counter state mm:0000000018f8450e type:MM_FILEPAGES val:33 [ 38.742255] BUG: Bad rss-counter state mm:0000000018f8450e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:33530' (ECDSA) to the list of known hosts. 2023/06/20 02:12:29 fuzzer started 2023/06/20 02:12:30 dialing manager at localhost:44161 2023/06/20 02:12:30 checking machine... 2023/06/20 02:12:30 checking revisions... [ 39.374632] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:12:30 testing simple program... [ 39.427060] cgroup: Unknown subsys name 'net' [ 39.479235] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:12:27 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888010378000 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff816308f8 RDI=ffff8880103783f4 RBP=ffff888010378000 RSP=ffff88801a01f890 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=ffff888010378000 R13=1ffff11003403f18 R14=ffff88801a01f8e0 R15=0000000000000001 RIP=ffffffff8137454d RFL=00000217 [----APC] 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 00007ff1e4c3c700 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=00007f5e7d958618 CR3=000000000d9a2000 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=2039323a32313a3230203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039323a32313a3230203032 XMM08=3d656e696c646d632022656369767265 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=0000000000000001 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=00007f4f5de122b0 CR3=000000000990a000 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=f7a829188e4667a33b47628103f887d1 XMM02=000000000011d580ec2efd57dc4c00df XMM03=0000000000123f20df669b42d197fd58 XMM04=452a7d559581acf100000000000ae988 XMM05=dfcdbad4f1609c3700000000001337c8 XMM06=806171799158d9670000000000133650 XMM07=e042d86d42eb936e00000000001241a0 XMM08=df669b42d197fd58000000000011d5e0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000