syzkaller login: [ 30.942922] BUG: Bad rss-counter state mm:00000000295fa7c4 type:MM_FILEPAGES val:33 [ 30.943665] BUG: Bad rss-counter state mm:00000000295fa7c4 type:MM_ANONPAGES val:22 [ 31.067874] ================================================================== [ 31.068473] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.069034] Read of size 8 at addr ffff88801a0c15c8 by task sshd/220 [ 31.069501] [ 31.069632] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.070194] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.070774] Call Trace: [ 31.070966] [ 31.071138] dump_stack_lvl+0x91/0xf0 [ 31.071435] print_report+0xcc/0x620 [ 31.071728] ? __virt_addr_valid+0x102/0x340 [ 31.072059] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.072434] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.073045] kasan_report+0xbe/0xf0 [ 31.073342] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.073742] vma_interval_tree_remove+0xc75/0xec0 [ 31.074143] vma_prepare+0xc54/0x11a0 [ 31.074439] __split_vma+0x5af/0x950 [ 31.074724] ? __pfx___split_vma+0x10/0x10 [ 31.075061] ? find_held_lock+0x2c/0x110 [ 31.075376] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.075718] ? lock_is_held_type+0x9f/0x120 [ 31.076046] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.076411] ? mtree_range_walk+0x632/0x900 [ 31.076743] ? mas_walk+0x5c7/0x7c0 [ 31.077031] do_vmi_munmap+0x1f1/0x2b0 [ 31.077382] mmap_region+0x1f9/0x2660 [ 31.077721] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.078041] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.078483] ? __pfx_lock_acquire+0x10/0x10 [ 31.078799] ? __pfx_mmap_region+0x10/0x10 [ 31.079122] ? security_mmap_addr+0x7d/0xa0 [ 31.079442] ? get_unmapped_area+0x1f5/0x3f0 [ 31.079770] do_mmap+0x854/0xf00 [ 31.080032] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.080328] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.080663] ksys_mmap_pgoff+0x3af/0x500 [ 31.080973] do_syscall_64+0x3f/0x90 [ 31.081274] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.081688] RIP: 0033:0x7f4180fded82 [ 31.081964] 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 [ 31.083240] RSP: 002b:00007fff676eb138 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.083784] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4180fded82 [ 31.084294] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4180418000 [ 31.084804] RBP: 00007f4180418000 R08: 0000000000000009 R09: 0000000000001000 [ 31.085321] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f9f5c0eec0 [ 31.085873] R13: 00007fff676eb150 R14: 00007fff676eb180 R15: 00007fff676eb4e0 [ 31.086422] [ 31.086603] [ 31.086734] Allocated by task 213: [ 31.086992] kasan_save_stack+0x22/0x50 [ 31.087304] kasan_set_track+0x25/0x30 [ 31.087600] __kasan_slab_alloc+0x59/0x70 [ 31.087917] kmem_cache_alloc+0x16b/0x370 [ 31.088227] vm_area_dup+0x20/0x160 [ 31.088501] __split_vma+0x170/0x950 [ 31.088786] split_vma+0xc6/0x110 [ 31.089053] mprotect_fixup+0x8d2/0xb30 [ 31.089404] do_mprotect_pkey+0x87e/0xd40 [ 31.089751] __x64_sys_mprotect+0x78/0xc0 [ 31.090067] do_syscall_64+0x3f/0x90 [ 31.090362] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.090754] [ 31.090891] Freed by task 13: [ 31.091127] kasan_save_stack+0x22/0x50 [ 31.091439] kasan_set_track+0x25/0x30 [ 31.091745] kasan_save_free_info+0x2b/0x50 [ 31.092074] __kasan_slab_free+0x10a/0x190 [ 31.092403] kmem_cache_free+0x10d/0x4d0 [ 31.092713] rcu_core+0x8c8/0x2860 [ 31.092984] __do_softirq+0x1b7/0x7d4 [ 31.093276] [ 31.093410] Last potentially related work creation: [ 31.093803] kasan_save_stack+0x22/0x50 [ 31.094111] __kasan_record_aux_stack+0x8e/0xa0 [ 31.094470] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.094864] remove_vma+0x139/0x170 [ 31.095140] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.095478] do_vmi_munmap+0x1f1/0x2b0 [ 31.095776] __vm_munmap+0x138/0x3a0 [ 31.096061] __x64_sys_munmap+0x59/0x80 [ 31.096368] do_syscall_64+0x3f/0x90 [ 31.096669] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.097070] [ 31.097202] The buggy address belongs to the object at ffff88801a0c1570 [ 31.097202] which belongs to the cache vm_area_struct of size 168 [ 31.098127] The buggy address is located 88 bytes inside of [ 31.098127] freed 168-byte region [ffff88801a0c1570, ffff88801a0c1618) [ 31.098974] [ 31.099111] The buggy address belongs to the physical page: [ 31.099555] page:00000000487201c0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a0c1 [ 31.100218] memcg:ffff88800fad6501 [ 31.100473] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.100857] page_type: 0xffffffff() [ 31.101128] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.101694] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fad6501 [ 31.102239] page dumped because: kasan: bad access detected [ 31.102636] [ 31.102769] Memory state around the buggy address: [ 31.103120] ffff88801a0c1480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.103684] ffff88801a0c1500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 31.104222] >ffff88801a0c1580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.104736] ^ [ 31.105144] ffff88801a0c1600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.105710] ffff88801a0c1680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.106225] ================================================================== [ 31.106990] Disabling lock debugging due to kernel taint [ 32.514377] BUG: Bad rss-counter state mm:0000000081994894 type:MM_FILEPAGES val:33 [ 32.515037] BUG: Bad rss-counter state mm:0000000081994894 type:MM_ANONPAGES val:22 [ 32.888240] BUG: Bad rss-counter state mm:0000000023cccec2 type:MM_FILEPAGES val:33 [ 32.888887] BUG: Bad rss-counter state mm:0000000023cccec2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:58934' (ECDSA) to the list of known hosts. 2023/06/21 09:50:09 fuzzer started 2023/06/21 09:50:09 dialing manager at localhost:36067 2023/06/21 09:50:09 checking machine... 2023/06/21 09:50:09 checking revisions... [ 33.466507] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:50:10 testing simple program... [ 33.503121] cgroup: Unknown subsys name 'net' [ 33.536719] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:50:09 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=ffffffff83c16dc0 RCX=0000000000000000 RDX=ffff88800ca7d1c0 RSI=ffffffff83c171d8 RDI=0000000000000005 RBP=ffff888014358000 RSP=ffff888016c7f908 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffff888016c7fb68 R13=ffff88800cb03680 R14=ffff888014358020 R15=0000000000000000 RIP=ffffffff814c086b 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 00007f8ede757700 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=00007ffe75255a38 CR3=00000000147ac000 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=30353a3930203132206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3932325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303932 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=dffffc0000000000 RBX=ffffffff83636c06 RCX=0000000000000001 RDX=1ffff11002c0fed6 RSI=ffff88801607fcb0 RDI=ffffffff83636c06 RBP=ffffffff83636c06 RSP=ffff88801607f600 R8 =0000000000000001 R9 =ffff88801607f698 R10=0000000000038001 R11=0000000000091bda R12=ffff88801607f720 R13=0000000000000000 R14=ffff888016b43680 R15=0000000000092cc0 RIP=ffffffff811fc6f7 RFL=00000296 [--S-AP-] 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 00007fcdde30b900 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=00007fcdde8c2618 CR3=000000000dbe4000 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