syzkaller login: [ 146.387393] BUG: Bad rss-counter state mm:000000004a563d5c type:MM_FILEPAGES val:33 [ 146.388405] BUG: Bad rss-counter state mm:000000004a563d5c type:MM_ANONPAGES val:22 [ 146.422256] ================================================================== [ 146.423304] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 146.424305] Read of size 8 at addr ffff88801a106c20 by task sshd/221 [ 146.425237] [ 146.425465] CPU: 1 PID: 221 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 146.426660] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 146.427774] Call Trace: [ 146.428102] [ 146.428437] dump_stack_lvl+0x91/0xf0 [ 146.429001] print_report+0xcc/0x620 [ 146.429480] ? __virt_addr_valid+0x102/0x340 [ 146.430125] ? vma_interval_tree_remove+0xc75/0xec0 [ 146.430759] ? vma_interval_tree_remove+0xc75/0xec0 [ 146.431381] kasan_report+0xbe/0xf0 [ 146.431863] ? vma_interval_tree_remove+0xc75/0xec0 [ 146.432488] vma_interval_tree_remove+0xc75/0xec0 [ 146.433091] vma_prepare+0xc54/0x11a0 [ 146.433567] __split_vma+0x5af/0x950 [ 146.434034] ? __pfx___split_vma+0x10/0x10 [ 146.434593] ? find_held_lock+0x2c/0x110 [ 146.435114] do_vmi_align_munmap+0x2ba/0x11f0 [ 146.435671] ? lock_is_held_type+0x9f/0x120 [ 146.436205] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 146.436816] ? mtree_range_walk+0x632/0x900 [ 146.437366] ? mas_walk+0x5c7/0x7c0 [ 146.437836] do_vmi_munmap+0x1f1/0x2b0 [ 146.438327] mmap_region+0x1f9/0x2660 [ 146.438814] ? vm_mmap_pgoff+0x15c/0x3a0 [ 146.439325] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 146.440042] ? __pfx_lock_acquire+0x10/0x10 [ 146.440565] ? __pfx_mmap_region+0x10/0x10 [ 146.441094] ? security_mmap_addr+0x7d/0xa0 [ 146.441621] ? get_unmapped_area+0x1f5/0x3f0 [ 146.442170] do_mmap+0x854/0xf00 [ 146.442618] vm_mmap_pgoff+0x1a6/0x3a0 [ 146.443113] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 146.443673] ksys_mmap_pgoff+0x3af/0x500 [ 146.444181] do_syscall_64+0x3f/0x90 [ 146.444658] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 146.445304] RIP: 0033:0x7fed28733d82 [ 146.445768] 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 [ 146.447926] RSP: 002b:00007ffd1e7421c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 146.448830] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fed28733d82 [ 146.449683] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fed27b6d000 [ 146.450551] RBP: 00007fed27b6d000 R08: 0000000000000009 R09: 0000000000001000 [ 146.451512] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558d0cc67ec0 [ 146.452366] R13: 00007ffd1e7421e0 R14: 00007ffd1e742210 R15: 00007ffd1e742570 [ 146.453237] [ 146.453534] [ 146.453749] Allocated by task 214: [ 146.454184] kasan_save_stack+0x22/0x50 [ 146.454711] kasan_set_track+0x25/0x30 [ 146.455206] __kasan_slab_alloc+0x59/0x70 [ 146.455743] kmem_cache_alloc+0x16b/0x370 [ 146.456257] vm_area_dup+0x20/0x160 [ 146.456709] __split_vma+0x170/0x950 [ 146.457179] split_vma+0xc6/0x110 [ 146.457615] mprotect_fixup+0x8d2/0xb30 [ 146.458118] do_mprotect_pkey+0x87e/0xd40 [ 146.458676] __x64_sys_mprotect+0x78/0xc0 [ 146.459196] do_syscall_64+0x3f/0x90 [ 146.459672] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 146.460311] [ 146.460523] Freed by task 214: [ 146.460915] kasan_save_stack+0x22/0x50 [ 146.461417] kasan_set_track+0x25/0x30 [ 146.461919] kasan_save_free_info+0x2b/0x50 [ 146.462454] __kasan_slab_free+0x10a/0x190 [ 146.463006] kmem_cache_free+0x10d/0x4d0 [ 146.463513] rcu_core+0x8c8/0x2860 [ 146.463969] __do_softirq+0x1b7/0x7d4 [ 146.464449] [ 146.464661] Last potentially related work creation: [ 146.465244] kasan_save_stack+0x22/0x50 [ 146.465748] __kasan_record_aux_stack+0x8e/0xa0 [ 146.466322] __call_rcu_common.constprop.0+0x6a/0xb90 [ 146.466983] remove_vma+0x139/0x170 [ 146.467438] do_vmi_align_munmap+0xd4a/0x11f0 [ 146.467996] do_vmi_munmap+0x1f1/0x2b0 [ 146.468480] __vm_munmap+0x138/0x3a0 [ 146.468949] __x64_sys_munmap+0x59/0x80 [ 146.469442] do_syscall_64+0x3f/0x90 [ 146.469916] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 146.470555] [ 146.470769] The buggy address belongs to the object at ffff88801a106bc8 [ 146.470769] which belongs to the cache vm_area_struct of size 168 [ 146.472237] The buggy address is located 88 bytes inside of [ 146.472237] freed 168-byte region [ffff88801a106bc8, ffff88801a106c70) [ 146.473629] [ 146.473849] The buggy address belongs to the physical page: [ 146.474501] page:00000000c90049d2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a106 [ 146.475602] memcg:ffff888019f5db01 [ 146.476026] flags: 0x100000000000200(slab|node=0|zone=1) [ 146.476662] page_type: 0xffffffff() [ 146.477113] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 146.478023] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019f5db01 [ 146.478935] page dumped because: kasan: bad access detected [ 146.479585] [ 146.479800] Memory state around the buggy address: [ 146.480379] ffff88801a106b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 146.481250] ffff88801a106b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 146.482103] >ffff88801a106c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 146.482972] ^ [ 146.483508] ffff88801a106c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 146.484359] ffff88801a106d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 146.485204] ================================================================== [ 146.486216] Disabling lock debugging due to kernel taint [ 148.645228] BUG: Bad rss-counter state mm:0000000059ba6e5e type:MM_FILEPAGES val:33 [ 148.646275] BUG: Bad rss-counter state mm:0000000059ba6e5e type:MM_ANONPAGES val:22 [ 149.130359] BUG: Bad rss-counter state mm:0000000045cf926a type:MM_FILEPAGES val:33 [ 149.131357] BUG: Bad rss-counter state mm:0000000045cf926a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:55910' (ECDSA) to the list of known hosts. 2023/06/20 03:10:45 fuzzer started 2023/06/20 03:10:45 dialing manager at localhost:44161 2023/06/20 03:10:45 checking machine... 2023/06/20 03:10:45 checking revisions... [ 149.852983] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:10:46 testing simple program... [ 149.900529] cgroup: Unknown subsys name 'net' [ 149.958461] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:08:50 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=1ffff110033bff33 RCX=0000000000000000 RDX=0000000080000000 RSI=00000000000016fb RDI=ffff88800fc05b40 RBP=ffff8880193251f0 RSP=ffff888019dff960 R8 =0000000000000007 R9 =fffffffffffff000 R10=ffff88801ad6acb8 R11=00000000000b6996 R12=ffff88801ad6acb8 R13=ffffffff81b4bd8d R14=0000000000000001 R15=ffff88801000c000 RIP=ffffffff814c07e4 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 00007f01f8f22700 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=00007fc052319618 CR3=000000000e290000 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=2035343a30313a3330203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035343a30313a3330203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff888008e57d38 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff888008e57c01 RSI=ffff888008e57cf0 RDI=ffff888008e57cf0 RBP=ffff888008e579d0 RSP=ffff888008e57908 R8 =0000000000000001 R9 =ffff888008e579b8 R10=0000000000038001 R11=0000000000020dae R12=ffff888008e579d8 R13=ffff888008e579c0 R14=ffff888008e57cf0 R15=ffff888008e57978 RIP=ffffffff81131236 RFL=00000202 [-------] 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=00007f6ef2a8f790 CR3=00000000099d6000 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=617fecba272f68a7f642c4d4e4a62c4a XMM02=0000000000128bb0eff9b2d0a8fce9cb XMM03=0000000000128c802c67c8bc2e329bc3 XMM04=69993517671b09c000000000000ae988 XMM05=e4cb8bb95a7664b60000000000140228 XMM06=c291bd5c70af25b900000000001400b0 XMM07=e042d86d42eb936e0000000000130af0 XMM08=3112188dfd75f3810000000000128c80 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000