syzkaller login: [ 56.228144] BUG: Bad rss-counter state mm:00000000bc5b9c84 type:MM_FILEPAGES val:33 [ 56.229659] BUG: Bad rss-counter state mm:00000000bc5b9c84 type:MM_ANONPAGES val:22 [ 56.386128] ================================================================== [ 56.387139] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 56.388272] Read of size 8 at addr ffff88800968bc20 by task sshd/221 [ 56.389080] [ 56.389310] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 56.390281] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 56.391300] Call Trace: [ 56.391636] [ 56.391933] dump_stack_lvl+0x91/0xf0 [ 56.392456] print_report+0xcc/0x620 [ 56.392963] ? __virt_addr_valid+0x102/0x340 [ 56.393557] ? vma_interval_tree_remove+0xc75/0xec0 [ 56.394214] ? vma_interval_tree_remove+0xc75/0xec0 [ 56.394868] kasan_report+0xbe/0xf0 [ 56.395365] ? vma_interval_tree_remove+0xc75/0xec0 [ 56.396026] vma_interval_tree_remove+0xc75/0xec0 [ 56.396667] vma_prepare+0xc54/0x11a0 [ 56.397180] __split_vma+0x5af/0x950 [ 56.397693] ? __pfx___split_vma+0x10/0x10 [ 56.398253] ? find_held_lock+0x2c/0x110 [ 56.398804] do_vmi_align_munmap+0x2ba/0x11f0 [ 56.399403] ? lock_is_held_type+0x9f/0x120 [ 56.399978] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 56.400621] ? mtree_range_walk+0x632/0x900 [ 56.401208] ? mas_walk+0x5c7/0x7c0 [ 56.401735] do_vmi_munmap+0x1f1/0x2b0 [ 56.402261] mmap_region+0x1f9/0x2660 [ 56.402778] ? vm_mmap_pgoff+0x15c/0x3a0 [ 56.403322] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 56.404101] ? __pfx_lock_acquire+0x10/0x10 [ 56.404666] ? __pfx_mmap_region+0x10/0x10 [ 56.405231] ? security_mmap_addr+0x7d/0xa0 [ 56.405803] ? get_unmapped_area+0x1f5/0x3f0 [ 56.406389] do_mmap+0x854/0xf00 [ 56.406860] vm_mmap_pgoff+0x1a6/0x3a0 [ 56.407381] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 56.407976] ksys_mmap_pgoff+0x3af/0x500 [ 56.408517] do_syscall_64+0x3f/0x90 [ 56.409029] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 56.409718] RIP: 0033:0x7f319a16fd82 [ 56.410200] 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 [ 56.412450] RSP: 002b:00007ffdbee9d378 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 56.413428] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f319a16fd82 [ 56.414373] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f31995a9000 [ 56.415271] RBP: 00007f31995a9000 R08: 0000000000000009 R09: 0000000000001000 [ 56.416165] R10: 0000000000000812 R11: 0000000000000206 R12: 00005638566b3ec0 [ 56.417066] R13: 00007ffdbee9d390 R14: 00007ffdbee9d3c0 R15: 00007ffdbee9d720 [ 56.417981] [ 56.418295] [ 56.418525] Allocated by task 214: [ 56.418983] kasan_save_stack+0x22/0x50 [ 56.419526] kasan_set_track+0x25/0x30 [ 56.420060] __kasan_slab_alloc+0x59/0x70 [ 56.420623] kmem_cache_alloc+0x16b/0x370 [ 56.421168] vm_area_dup+0x20/0x160 [ 56.421664] __split_vma+0x170/0x950 [ 56.422156] split_vma+0xc6/0x110 [ 56.422626] mprotect_fixup+0x8d2/0xb30 [ 56.423158] do_mprotect_pkey+0x87e/0xd40 [ 56.423726] __x64_sys_mprotect+0x78/0xc0 [ 56.424275] do_syscall_64+0x3f/0x90 [ 56.424777] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 56.425483] [ 56.425713] Freed by task 214: [ 56.426133] kasan_save_stack+0x22/0x50 [ 56.426676] kasan_set_track+0x25/0x30 [ 56.427206] kasan_save_free_info+0x2b/0x50 [ 56.427784] __kasan_slab_free+0x10a/0x190 [ 56.428358] kmem_cache_free+0x10d/0x4d0 [ 56.429016] rcu_core+0x8c8/0x2860 [ 56.429502] __do_softirq+0x1b7/0x7d4 [ 56.430014] [ 56.430240] Last potentially related work creation: [ 56.430861] kasan_save_stack+0x22/0x50 [ 56.431396] __kasan_record_aux_stack+0x8e/0xa0 [ 56.432007] __call_rcu_common.constprop.0+0x6a/0xb90 [ 56.432682] remove_vma+0x139/0x170 [ 56.433166] do_vmi_align_munmap+0xd4a/0x11f0 [ 56.433792] do_vmi_munmap+0x1f1/0x2b0 [ 56.434308] __vm_munmap+0x138/0x3a0 [ 56.434808] __x64_sys_munmap+0x59/0x80 [ 56.435343] do_syscall_64+0x3f/0x90 [ 56.435842] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 56.436530] [ 56.436759] The buggy address belongs to the object at ffff88800968bbc8 [ 56.436759] which belongs to the cache vm_area_struct of size 168 [ 56.438338] The buggy address is located 88 bytes inside of [ 56.438338] freed 168-byte region [ffff88800968bbc8, ffff88800968bc70) [ 56.439833] [ 56.440064] The buggy address belongs to the physical page: [ 56.440762] page:000000004c6f279e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x968b [ 56.441912] memcg:ffff888016236a01 [ 56.442364] flags: 0x100000000000200(slab|node=0|zone=1) [ 56.443048] page_type: 0xffffffff() [ 56.443525] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 56.444493] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016236a01 [ 56.445462] page dumped because: kasan: bad access detected [ 56.446175] [ 56.446400] Memory state around the buggy address: [ 56.447023] ffff88800968bb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 56.447944] ffff88800968bb80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 56.448859] >ffff88800968bc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 56.449775] ^ [ 56.450338] ffff88800968bc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 56.451253] ffff88800968bd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 56.452165] ================================================================== [ 56.453472] Disabling lock debugging due to kernel taint [ 58.603370] BUG: Bad rss-counter state mm:00000000b5f60fc6 type:MM_FILEPAGES val:33 [ 58.604810] BUG: Bad rss-counter state mm:00000000b5f60fc6 type:MM_ANONPAGES val:22 [ 59.055551] BUG: Bad rss-counter state mm:0000000029a6f6ef type:MM_FILEPAGES val:33 [ 59.056557] BUG: Bad rss-counter state mm:0000000029a6f6ef type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:49080' (ECDSA) to the list of known hosts. 2023/06/20 01:38:08 fuzzer started 2023/06/20 01:38:08 dialing manager at localhost:44161 2023/06/20 01:38:08 checking machine... 2023/06/20 01:38:08 checking revisions... [ 59.748048] kmemleak: Automatic memory scanning thread ended 2023/06/20 01:38:08 testing simple program... [ 59.792719] cgroup: Unknown subsys name 'net' [ 59.829194] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:37:43 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88801687a1b8 RCX=0000000000000000 RDX=ffff888019769b40 RSI=ffff88800fd3b500 RDI=ffff88801687a1b8 RBP=ffff88800fd3b500 RSP=ffff88801c93fb40 R8 =0000000000000005 R9 =0000000000000000 R10=000000000000001a R11=0000000000000001 R12=ffff88801687a650 R13=ffff88801687a1d0 R14=ffff88801c93fc48 R15=0000000000000053 RIP=ffffffff814c07e4 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 00007f090a665900 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=00007f090ac1a650 CR3=000000000e9a4000 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=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 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=ffff888008c58400 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=00007ffc1735eb08 CR3=000000000eb8e000 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=2038303a38333a3130203032206e754a XMM01=657463656e6e6f63736944203a5d3033 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3033325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038303a38333a3130203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000