syzkaller login: [ 60.226687] BUG: Bad rss-counter state mm:00000000dcd7818b type:MM_FILEPAGES val:33 [ 60.227891] BUG: Bad rss-counter state mm:00000000dcd7818b type:MM_ANONPAGES val:22 [ 60.267161] ================================================================== [ 60.267742] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 60.268398] Read of size 8 at addr ffff88800ebb4c20 by task sshd/227 [ 60.268815] [ 60.268954] CPU: 1 PID: 227 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 60.269490] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 60.270109] Call Trace: [ 60.270298] [ 60.270504] dump_stack_lvl+0x91/0xf0 [ 60.270857] print_report+0xcc/0x620 [ 60.271208] ? __virt_addr_valid+0x102/0x340 [ 60.271785] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.272262] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.272735] kasan_report+0xbe/0xf0 [ 60.273099] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.273573] vma_interval_tree_remove+0xc75/0xec0 [ 60.274050] vma_prepare+0xc54/0x11a0 [ 60.274426] __split_vma+0x5af/0x950 [ 60.274791] ? __pfx___split_vma+0x10/0x10 [ 60.275192] ? find_held_lock+0x2c/0x110 [ 60.275595] do_vmi_align_munmap+0x2ba/0x11f0 [ 60.276034] ? lock_is_held_type+0x9f/0x120 [ 60.276456] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 60.276923] ? mtree_range_walk+0x632/0x900 [ 60.277351] ? mas_walk+0x5c7/0x7c0 [ 60.277720] do_vmi_munmap+0x1f1/0x2b0 [ 60.278101] mmap_region+0x1f9/0x2660 [ 60.278480] ? vm_mmap_pgoff+0x15c/0x3a0 [ 60.278874] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 60.279423] ? __pfx_lock_acquire+0x10/0x10 [ 60.279835] ? __pfx_mmap_region+0x10/0x10 [ 60.280244] ? security_mmap_addr+0x7d/0xa0 [ 60.280659] ? get_unmapped_area+0x1f5/0x3f0 [ 60.281083] do_mmap+0x854/0xf00 [ 60.281429] vm_mmap_pgoff+0x1a6/0x3a0 [ 60.281815] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 60.282248] ksys_mmap_pgoff+0x3af/0x500 [ 60.282670] do_syscall_64+0x3f/0x90 [ 60.283045] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.283450] RIP: 0033:0x7f8b0948dd82 [ 60.283703] 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 [ 60.284884] RSP: 002b:00007ffebf75d808 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 60.285382] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8b0948dd82 [ 60.285849] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8b088c7000 [ 60.286334] RBP: 00007f8b088c7000 R08: 0000000000000009 R09: 0000000000001000 [ 60.286799] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bebe928ec0 [ 60.287262] R13: 00007ffebf75d820 R14: 00007ffebf75d850 R15: 00007ffebf75dbb0 [ 60.287733] [ 60.287895] [ 60.288012] Allocated by task 220: [ 60.288245] kasan_save_stack+0x22/0x50 [ 60.288519] kasan_set_track+0x25/0x30 [ 60.288790] __kasan_slab_alloc+0x59/0x70 [ 60.289078] kmem_cache_alloc+0x16b/0x370 [ 60.289361] vm_area_dup+0x20/0x160 [ 60.289609] __split_vma+0x170/0x950 [ 60.289861] split_vma+0xc6/0x110 [ 60.290104] mprotect_fixup+0x8d2/0xb30 [ 60.290399] do_mprotect_pkey+0x87e/0xd40 [ 60.290684] __x64_sys_mprotect+0x78/0xc0 [ 60.290969] do_syscall_64+0x3f/0x90 [ 60.291226] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.291580] [ 60.291698] Freed by task 220: [ 60.291912] kasan_save_stack+0x22/0x50 [ 60.292190] kasan_set_track+0x25/0x30 [ 60.292459] kasan_save_free_info+0x2b/0x50 [ 60.292753] __kasan_slab_free+0x10a/0x190 [ 60.293045] kmem_cache_free+0x10d/0x4d0 [ 60.293319] rcu_core+0x8c8/0x2860 [ 60.293561] __do_softirq+0x1b7/0x7d4 [ 60.293821] [ 60.293936] Last potentially related work creation: [ 60.294255] kasan_save_stack+0x22/0x50 [ 60.294536] __kasan_record_aux_stack+0x8e/0xa0 [ 60.294852] __call_rcu_common.constprop.0+0x6a/0xb90 [ 60.295203] remove_vma+0x139/0x170 [ 60.295451] do_vmi_align_munmap+0xd4a/0x11f0 [ 60.295761] do_vmi_munmap+0x1f1/0x2b0 [ 60.296029] __vm_munmap+0x138/0x3a0 [ 60.296290] __x64_sys_munmap+0x59/0x80 [ 60.296564] do_syscall_64+0x3f/0x90 [ 60.296821] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.297172] [ 60.297289] The buggy address belongs to the object at ffff88800ebb4bc8 [ 60.297289] which belongs to the cache vm_area_struct of size 168 [ 60.298101] The buggy address is located 88 bytes inside of [ 60.298101] freed 168-byte region [ffff88800ebb4bc8, ffff88800ebb4c70) [ 60.298884] [ 60.299001] The buggy address belongs to the physical page: [ 60.299360] page:00000000cbc94575 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xebb4 [ 60.299953] memcg:ffff8880186ca601 [ 60.300185] flags: 0x100000000000200(slab|node=0|zone=1) [ 60.300534] page_type: 0xffffffff() [ 60.300781] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 60.301283] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880186ca601 [ 60.301778] page dumped because: kasan: bad access detected [ 60.302141] [ 60.302261] Memory state around the buggy address: [ 60.302585] ffff88800ebb4b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 60.303057] ffff88800ebb4b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 60.303532] >ffff88800ebb4c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 60.303998] ^ [ 60.304290] ffff88800ebb4c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 60.304760] ffff88800ebb4d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 60.305232] ================================================================== [ 60.305745] Disabling lock debugging due to kernel taint [ 62.067881] BUG: Bad rss-counter state mm:000000005f580e31 type:MM_FILEPAGES val:33 [ 62.068880] BUG: Bad rss-counter state mm:000000005f580e31 type:MM_ANONPAGES val:22 [ 62.514998] BUG: Bad rss-counter state mm:0000000088522d6c type:MM_FILEPAGES val:33 [ 62.516026] BUG: Bad rss-counter state mm:0000000088522d6c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:46756' (ECDSA) to the list of known hosts. 2023/06/20 20:10:10 fuzzer started 2023/06/20 20:10:10 dialing manager at localhost:36067 2023/06/20 20:10:10 checking machine... 2023/06/20 20:10:10 checking revisions... [ 63.231391] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:10:10 testing simple program... [ 63.275946] cgroup: Unknown subsys name 'net' [ 63.373882] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:10:10 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=00007f7b28022d8f RCX=0000000000000000 RDX=ffff88800dfb9b40 RSI=ffffffff816f2553 RDI=0000000000000005 RBP=00007f7b28022de9 RSP=ffff8880141ffa10 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=000000000000005a R13=00007f7b28021d90 R14=0000000000000000 R15=1ffff1100283ff44 RIP=ffffffff814c089b RFL=00040246 [---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 00007f7b37b7c700 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=00007f3c5a2a20b0 CR3=000000000fc74000 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=2039303a30313a3032203032206e754a XMM01=73732878696e755f6d6170203a5d3633 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3633325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039303a30313a3032203032 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=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007f7bf566c020 CR3=000000000d5b4000 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=78e9450c30b6d9a3f040c68816f61a67 XMM02=2c67c8bc2e329bc30000000000119968 XMM03=fb795ef6d657705600000000001205c0 XMM04=4f68534cf9fc0db600000000000ae988 XMM05=16bbfc4fa606b625000000000012f950 XMM06=4fa54db726ad0368000000000012eb28 XMM07=e042d86d42eb936e0000000000120840 XMM08=5f25890e3f9a504200000000001199c8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000