syzkaller login: [ 30.881792] BUG: Bad rss-counter state mm:00000000ddf61645 type:MM_FILEPAGES val:33 [ 30.883286] BUG: Bad rss-counter state mm:00000000ddf61645 type:MM_ANONPAGES val:22 [ 31.053587] ================================================================== [ 31.054717] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.055760] Read of size 8 at addr ffff888019a69310 by task sshd/220 [ 31.056655] [ 31.056903] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.057873] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.059032] Call Trace: [ 31.059387] [ 31.059711] dump_stack_lvl+0x91/0xf0 [ 31.060264] print_report+0xcc/0x620 [ 31.060801] ? __virt_addr_valid+0x102/0x340 [ 31.061422] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.062120] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.062784] kasan_report+0xbe/0xf0 [ 31.063300] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.063980] vma_interval_tree_remove+0xc75/0xec0 [ 31.064630] vma_prepare+0xc54/0x11a0 [ 31.065138] __split_vma+0x5af/0x950 [ 31.065641] ? __pfx___split_vma+0x10/0x10 [ 31.066231] ? find_held_lock+0x2c/0x110 [ 31.066801] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.067422] ? lock_is_held_type+0x9f/0x120 [ 31.068021] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.068693] ? mtree_range_walk+0x632/0x900 [ 31.069321] ? mas_walk+0x5c7/0x7c0 [ 31.069854] do_vmi_munmap+0x1f1/0x2b0 [ 31.070415] mmap_region+0x1f9/0x2660 [ 31.070947] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.071509] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.072285] ? __pfx_lock_acquire+0x10/0x10 [ 31.072871] ? __pfx_mmap_region+0x10/0x10 [ 31.073450] ? security_mmap_addr+0x7d/0xa0 [ 31.074034] ? get_unmapped_area+0x1f5/0x3f0 [ 31.074648] do_mmap+0x854/0xf00 [ 31.075137] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.075689] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.076311] ksys_mmap_pgoff+0x3af/0x500 [ 31.076875] do_syscall_64+0x3f/0x90 [ 31.077405] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.078151] RIP: 0033:0x7f01f040ed82 [ 31.078671] 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 [ 31.081095] RSP: 002b:00007ffd95a75b98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.082140] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f01f040ed82 [ 31.083111] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f01ef848000 [ 31.084085] RBP: 00007f01ef848000 R08: 0000000000000009 R09: 0000000000001000 [ 31.085054] R10: 0000000000000812 R11: 0000000000000206 R12: 00005586808a4b20 [ 31.086008] R13: 00007ffd95a75bb0 R14: 00007ffd95a75be0 R15: 00007ffd95a75f40 [ 31.086993] [ 31.087299] [ 31.087522] Allocated by task 213: [ 31.087976] kasan_save_stack+0x22/0x50 [ 31.088503] kasan_set_track+0x25/0x30 [ 31.089023] __kasan_slab_alloc+0x59/0x70 [ 31.089576] kmem_cache_alloc+0x16b/0x370 [ 31.090122] vm_area_dup+0x20/0x160 [ 31.090585] __split_vma+0x170/0x950 [ 31.091059] split_vma+0xc6/0x110 [ 31.091501] mprotect_fixup+0x8d2/0xb30 [ 31.092015] do_mprotect_pkey+0x87e/0xd40 [ 31.092545] __x64_sys_mprotect+0x78/0xc0 [ 31.093077] do_syscall_64+0x3f/0x90 [ 31.093568] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.094253] [ 31.094467] Freed by task 213: [ 31.094859] kasan_save_stack+0x22/0x50 [ 31.095365] kasan_set_track+0x25/0x30 [ 31.095876] kasan_save_free_info+0x2b/0x50 [ 31.096411] __kasan_slab_free+0x10a/0x190 [ 31.096950] kmem_cache_free+0x10d/0x4d0 [ 31.097469] rcu_core+0x8c8/0x2860 [ 31.097922] __do_softirq+0x1b7/0x7d4 [ 31.098410] [ 31.098631] Last potentially related work creation: [ 31.099216] kasan_save_stack+0x22/0x50 [ 31.099713] __kasan_record_aux_stack+0x8e/0xa0 [ 31.100282] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.100914] remove_vma+0x139/0x170 [ 31.101366] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.101925] do_vmi_munmap+0x1f1/0x2b0 [ 31.102424] __vm_munmap+0x138/0x3a0 [ 31.102888] __x64_sys_munmap+0x59/0x80 [ 31.103380] do_syscall_64+0x3f/0x90 [ 31.103851] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.104483] [ 31.104701] The buggy address belongs to the object at ffff888019a692b8 [ 31.104701] which belongs to the cache vm_area_struct of size 168 [ 31.106170] The buggy address is located 88 bytes inside of [ 31.106170] freed 168-byte region [ffff888019a692b8, ffff888019a69360) [ 31.107552] [ 31.107764] The buggy address belongs to the physical page: [ 31.108418] page:00000000f187de3c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19a69 [ 31.109500] memcg:ffff88800c650901 [ 31.109920] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.110575] page_type: 0xffffffff() [ 31.111020] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.111928] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c650901 [ 31.112821] page dumped because: kasan: bad access detected [ 31.113470] [ 31.113685] Memory state around the buggy address: [ 31.114277] ffff888019a69200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 31.115131] ffff888019a69280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.115979] >ffff888019a69300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.116838] ^ [ 31.117309] ffff888019a69380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.118181] ffff888019a69400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.119083] ================================================================== [ 31.120174] Disabling lock debugging due to kernel taint [ 33.774234] BUG: Bad rss-counter state mm:000000007b32f265 type:MM_FILEPAGES val:33 [ 33.775837] BUG: Bad rss-counter state mm:000000007b32f265 type:MM_ANONPAGES val:22 [ 34.295958] BUG: Bad rss-counter state mm:00000000cafd0205 type:MM_FILEPAGES val:33 [ 34.297040] BUG: Bad rss-counter state mm:00000000cafd0205 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:24490' (ECDSA) to the list of known hosts. 2023/06/20 16:26:30 fuzzer started 2023/06/20 16:26:30 dialing manager at localhost:36067 2023/06/20 16:26:30 checking machine... 2023/06/20 16:26:30 checking revisions... [ 35.070443] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:26:31 testing simple program... [ 35.125264] cgroup: Unknown subsys name 'net' [ 35.178023] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:26:30 Registers: info registers vcpu 0 RAX=00007fc428003390 RBX=0000000000000000 RCX=000000000000001b RDX=000000000000001b RSI=00007fc428000220 RDI=00007fc428000220 RBP=0000000000001fb0 RSP=00007fc433368620 R8 =0000000000000000 R9 =00007fc428000080 R10=00007fc428003540 R11=0000000000000000 R12=00007fc428000020 R13=00007fc4280008d0 R14=fffffffffffffee0 R15=00007fc43343f840 RIP=00007fc433785a73 RFL=00000216 [----AP-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fc43336c700 00000000 00000000 GS =0000 0000000000000000 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=00007f6f4fe20f30 CR3=0000000016c1c000 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=36323a3631203032206e754a3e38333c XMM01=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3932325b646873732030333a3632 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343034 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88801b82b700 RCX=ffffffff844f54c5 RDX=ffff88800905b680 RSI=0000000000000000 RDI=0000000000000004 RBP=ffff8880090bf1a0 RSP=ffff8880090bf0c8 R8 =0000000000000004 R9 =0000000000000011 R10=0000000000000010 R11=0000000000000128 R12=dffffc0000000000 R13=0000000000000010 R14=0000000000000011 R15=fffffffffffe0000 RIP=ffffffff814c0860 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=00007f2e1ee79618 CR3=000000000ee02000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000