syzkaller login: [ 34.260957] BUG: Bad rss-counter state mm:0000000020659fed type:MM_FILEPAGES val:33 [ 34.261533] BUG: Bad rss-counter state mm:0000000020659fed type:MM_ANONPAGES val:22 [ 34.425247] ================================================================== [ 34.426333] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.427453] Read of size 8 at addr ffff88800f027058 by task sshd/220 [ 34.428573] [ 34.428837] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.429866] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.431058] Call Trace: [ 34.431414] [ 34.431714] dump_stack_lvl+0x91/0xf0 [ 34.432231] print_report+0xcc/0x620 [ 34.432727] ? __virt_addr_valid+0x102/0x340 [ 34.433280] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.433932] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.434594] kasan_report+0xbe/0xf0 [ 34.435119] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.435786] vma_interval_tree_remove+0xc75/0xec0 [ 34.436419] vma_prepare+0xc54/0x11a0 [ 34.436949] __split_vma+0x5af/0x950 [ 34.437472] ? __pfx___split_vma+0x10/0x10 [ 34.438054] ? find_held_lock+0x2c/0x110 [ 34.438625] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.439246] ? lock_is_held_type+0x9f/0x120 [ 34.439837] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.440508] ? mtree_range_walk+0x632/0x900 [ 34.441140] ? mas_walk+0x5c7/0x7c0 [ 34.441669] do_vmi_munmap+0x1f1/0x2b0 [ 34.442214] mmap_region+0x1f9/0x2660 [ 34.442756] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.443320] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.444112] ? __pfx_lock_acquire+0x10/0x10 [ 34.444716] ? __pfx_mmap_region+0x10/0x10 [ 34.445300] ? security_mmap_addr+0x7d/0xa0 [ 34.445885] ? get_unmapped_area+0x1f5/0x3f0 [ 34.446497] do_mmap+0x854/0xf00 [ 34.446989] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.447538] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.448161] ksys_mmap_pgoff+0x3af/0x500 [ 34.448736] do_syscall_64+0x3f/0x90 [ 34.449272] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.449990] RIP: 0033:0x7f5d215f9d82 [ 34.450494] 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 [ 34.452878] RSP: 002b:00007ffd3531eec8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.453881] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5d215f9d82 [ 34.454821] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5d20a33000 [ 34.455770] RBP: 00007f5d20a33000 R08: 0000000000000009 R09: 0000000000001000 [ 34.456725] R10: 0000000000000812 R11: 0000000000000206 R12: 000055edced70980 [ 34.457677] R13: 00007ffd3531eee0 R14: 00007ffd3531ef10 R15: 00007ffd3531f270 [ 34.458632] [ 34.458957] [ 34.459196] Allocated by task 213: [ 34.459676] kasan_save_stack+0x22/0x50 [ 34.460244] kasan_set_track+0x25/0x30 [ 34.460804] __kasan_slab_alloc+0x59/0x70 [ 34.461388] kmem_cache_alloc+0x16b/0x370 [ 34.461971] vm_area_dup+0x20/0x160 [ 34.462482] __split_vma+0x170/0x950 [ 34.462966] split_vma+0xc6/0x110 [ 34.463436] mprotect_fixup+0x8d2/0xb30 [ 34.464004] do_mprotect_pkey+0x87e/0xd40 [ 34.464618] __x64_sys_mprotect+0x78/0xc0 [ 34.465211] do_syscall_64+0x3f/0x90 [ 34.465753] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.466474] [ 34.466694] Freed by task 213: [ 34.467099] kasan_save_stack+0x22/0x50 [ 34.467659] kasan_set_track+0x25/0x30 [ 34.468224] kasan_save_free_info+0x2b/0x50 [ 34.468840] __kasan_slab_free+0x10a/0x190 [ 34.469498] kmem_cache_free+0x10d/0x4d0 [ 34.470071] rcu_core+0x8c8/0x2860 [ 34.470585] __do_softirq+0x1b7/0x7d4 [ 34.471128] [ 34.471371] Last potentially related work creation: [ 34.472040] kasan_save_stack+0x22/0x50 [ 34.472615] __kasan_record_aux_stack+0x8e/0xa0 [ 34.473210] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.473940] remove_vma+0x139/0x170 [ 34.474458] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.475098] do_vmi_munmap+0x1f1/0x2b0 [ 34.475657] __vm_munmap+0x138/0x3a0 [ 34.476187] __x64_sys_munmap+0x59/0x80 [ 34.476761] do_syscall_64+0x3f/0x90 [ 34.477290] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.478001] [ 34.478252] The buggy address belongs to the object at ffff88800f027000 [ 34.478252] which belongs to the cache vm_area_struct of size 168 [ 34.479978] The buggy address is located 88 bytes inside of [ 34.479978] freed 168-byte region [ffff88800f027000, ffff88800f0270a8) [ 34.481615] [ 34.481869] The buggy address belongs to the physical page: [ 34.482628] page:000000008029a531 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf027 [ 34.483858] memcg:ffff88800c9b3e01 [ 34.484348] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.485146] page_type: 0xffffffff() [ 34.485669] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 34.486729] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c9b3e01 [ 34.487808] page dumped because: kasan: bad access detected [ 34.488605] [ 34.488857] Memory state around the buggy address: [ 34.489564] ffff88800f026f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 34.490590] ffff88800f026f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 34.491628] >ffff88800f027000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.492688] ^ [ 34.493563] ffff88800f027080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 34.494595] ffff88800f027100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.495617] ================================================================== [ 34.496758] Disabling lock debugging due to kernel taint [ 37.020971] BUG: Bad rss-counter state mm:000000000138f95b type:MM_FILEPAGES val:33 [ 37.022014] BUG: Bad rss-counter state mm:000000000138f95b type:MM_ANONPAGES val:22 [ 37.484062] BUG: Bad rss-counter state mm:000000003fe3dd2a type:MM_FILEPAGES val:33 [ 37.485284] BUG: Bad rss-counter state mm:000000003fe3dd2a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:59072' (ECDSA) to the list of known hosts. 2023/06/19 18:05:24 fuzzer started 2023/06/19 18:05:24 dialing manager at localhost:44161 2023/06/19 18:05:24 checking machine... 2023/06/19 18:05:24 checking revisions... [ 38.217717] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:05:24 testing simple program... [ 38.266378] cgroup: Unknown subsys name 'net' [ 38.308222] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:05:21 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000001 RCX=0000000000000000 RDX=0000000000000001 RSI=00000000000000fb RDI=0000000000000001 RBP=ffff88806ce09d18 RSP=ffff88806ce09c50 R8 =0000000000000001 R9 =ffffed100d9c1396 R10=ffff88806ce09cb7 R11=0000000000000000 R12=0000000000000001 R13=0000000000000000 R14=0000000000000001 R15=dffffc0000000000 RIP=ffffffff8112993a RFL=00000002 [-------] 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fe5ff7f2900 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=00007ffdf818aeac CR3=00000000096f4000 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=000000000000000000000000000000ff XMM02=3bde18912fc5e1146b71321e4950734f XMM03=74c02fee6cf09a2b54fb7044c7e71b53 XMM04=84183c5bbe05a680da009e58c51605ee XMM05=000000000000000000ff0000000000ff XMM06=74182f5b6c059a2b54007044c5160553 XMM07=672065736f6c635f6e6f69737365733a XMM08=652075253d64692073253d706f000000 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=00007f90e97d5230 CR3=000000000c4e6000 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=cbe8c1f0f4d9cc9f70443bbcf5eac183 XMM02=000000000011d960ec2efd57dc4c00df XMM03=0000000000124630bf4f52600da2d4e8 XMM04=d9e67041ec74f9bf00000000000ae988 XMM05=7fd8dfca2baaf72f0000000000135020 XMM06=4fda316b135da52b00000000001340c0 XMM07=e042d86d42eb936e00000000001248b0 XMM08=bf4f52600da2d4e8000000000011d9c0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000