syzkaller login: [ 35.921917] BUG: Bad rss-counter state mm:00000000b4fe6e36 type:MM_FILEPAGES val:33 [ 35.922851] BUG: Bad rss-counter state mm:00000000b4fe6e36 type:MM_ANONPAGES val:22 [ 36.084516] ================================================================== [ 36.085645] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.086590] Read of size 8 at addr ffff88801a24b968 by task sshd/219 [ 36.087505] [ 36.087734] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.088604] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.089611] Call Trace: [ 36.089937] [ 36.090227] dump_stack_lvl+0x91/0xf0 [ 36.090725] print_report+0xcc/0x620 [ 36.091218] ? __virt_addr_valid+0x102/0x340 [ 36.091778] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.092407] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.093039] kasan_report+0xbe/0xf0 [ 36.093524] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.094146] vma_interval_tree_remove+0xc75/0xec0 [ 36.094764] vma_prepare+0xc54/0x11a0 [ 36.095244] __split_vma+0x5af/0x950 [ 36.095725] ? __pfx___split_vma+0x10/0x10 [ 36.096252] ? find_held_lock+0x2c/0x110 [ 36.096798] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.097360] ? lock_is_held_type+0x9f/0x120 [ 36.097903] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.098515] ? mtree_range_walk+0x632/0x900 [ 36.099068] ? mas_walk+0x5c7/0x7c0 [ 36.099546] do_vmi_munmap+0x1f1/0x2b0 [ 36.100041] mmap_region+0x1f9/0x2660 [ 36.100523] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.101061] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.101794] ? __pfx_lock_acquire+0x10/0x10 [ 36.102340] ? __pfx_mmap_region+0x10/0x10 [ 36.102875] ? security_mmap_addr+0x7d/0xa0 [ 36.103412] ? get_unmapped_area+0x1f5/0x3f0 [ 36.103974] do_mmap+0x854/0xf00 [ 36.104412] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.104938] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.105511] ksys_mmap_pgoff+0x3af/0x500 [ 36.106029] do_syscall_64+0x3f/0x90 [ 36.106510] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.107164] RIP: 0033:0x7fbfdbe1ad82 [ 36.107629] 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 [ 36.109754] RSP: 002b:00007ffe62da3668 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.110685] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbfdbe1ad82 [ 36.111561] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbfdb254000 [ 36.112413] RBP: 00007fbfdb254000 R08: 0000000000000009 R09: 0000000000001000 [ 36.113301] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fda8855ec0 [ 36.114158] R13: 00007ffe62da3680 R14: 00007ffe62da36b0 R15: 00007ffe62da3a10 [ 36.115019] [ 36.115311] [ 36.115530] Allocated by task 212: [ 36.115959] kasan_save_stack+0x22/0x50 [ 36.116468] kasan_set_track+0x25/0x30 [ 36.116980] __kasan_slab_alloc+0x59/0x70 [ 36.117520] kmem_cache_alloc+0x16b/0x370 [ 36.118047] vm_area_dup+0x20/0x160 [ 36.118500] __split_vma+0x170/0x950 [ 36.118974] split_vma+0xc6/0x110 [ 36.119421] mprotect_fixup+0x8d2/0xb30 [ 36.119919] do_mprotect_pkey+0x87e/0xd40 [ 36.120445] __x64_sys_mprotect+0x78/0xc0 [ 36.120992] do_syscall_64+0x3f/0x90 [ 36.121481] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.122125] [ 36.122343] Freed by task 202: [ 36.122740] kasan_save_stack+0x22/0x50 [ 36.123244] kasan_set_track+0x25/0x30 [ 36.123748] kasan_save_free_info+0x2b/0x50 [ 36.124288] __kasan_slab_free+0x10a/0x190 [ 36.124852] kmem_cache_free+0x10d/0x4d0 [ 36.125363] rcu_core+0x8c8/0x2860 [ 36.125823] __do_softirq+0x1b7/0x7d4 [ 36.126301] [ 36.126520] Last potentially related work creation: [ 36.127102] kasan_save_stack+0x22/0x50 [ 36.127609] __kasan_record_aux_stack+0x8e/0xa0 [ 36.128191] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.128914] remove_vma+0x139/0x170 [ 36.129379] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.129938] do_vmi_munmap+0x1f1/0x2b0 [ 36.130426] __vm_munmap+0x138/0x3a0 [ 36.130898] __x64_sys_munmap+0x59/0x80 [ 36.131394] do_syscall_64+0x3f/0x90 [ 36.131867] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.132506] [ 36.132719] The buggy address belongs to the object at ffff88801a24b910 [ 36.132719] which belongs to the cache vm_area_struct of size 168 [ 36.134205] The buggy address is located 88 bytes inside of [ 36.134205] freed 168-byte region [ffff88801a24b910, ffff88801a24b9b8) [ 36.135625] [ 36.135844] The buggy address belongs to the physical page: [ 36.136505] page:000000006bdfd141 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a24b [ 36.137621] memcg:ffff88800d559101 [ 36.138051] flags: 0x100000000000200(slab|node=0|zone=1) [ 36.138699] page_type: 0xffffffff() [ 36.139157] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 36.140076] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d559101 [ 36.141005] page dumped because: kasan: bad access detected [ 36.141678] [ 36.141896] Memory state around the buggy address: [ 36.142472] ffff88801a24b800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 36.143324] ffff88801a24b880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 36.144183] >ffff88801a24b900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.145045] ^ [ 36.145830] ffff88801a24b980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 36.146681] ffff88801a24ba00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.147532] ================================================================== [ 36.148447] Disabling lock debugging due to kernel taint [ 38.476228] BUG: Bad rss-counter state mm:00000000d217798b type:MM_FILEPAGES val:33 [ 38.477374] BUG: Bad rss-counter state mm:00000000d217798b type:MM_ANONPAGES val:22 [ 38.882134] BUG: Bad rss-counter state mm:00000000c9f1eb0b type:MM_FILEPAGES val:33 [ 38.883303] BUG: Bad rss-counter state mm:00000000c9f1eb0b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:21179' (ECDSA) to the list of known hosts. 2023/06/20 05:50:53 fuzzer started 2023/06/20 05:50:53 dialing manager at localhost:44161 2023/06/20 05:50:53 checking machine... 2023/06/20 05:50:53 checking revisions... [ 39.601182] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:50:54 testing simple program... [ 39.646362] cgroup: Unknown subsys name 'net' [ 39.686591] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:50:47 Registers: info registers vcpu 0 RAX=ffffffff860d68f7 RBX=0000000000000001 RCX=ffffffff860d68f6 RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88801676fad8 RSP=ffff88801676fa10 R8 =ffffffff860d68fa R9 =ffff88801676fac0 R10=0000000000038001 R11=0000000000010b7e R12=ffff88801676fae0 R13=ffff88801676fac8 R14=ffff88801676fb28 R15=ffff88801676fa80 RIP=ffffffff81130b99 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 00007f7ef1262900 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=00007f7ef1819618 CR3=000000000dca0000 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=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 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=0000000000000001 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=00007f59497ff560 CR3=000000000d52a000 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=42e33510b9c7629ebb433db6d83caa88 XMM02=ec2efd57dc4c00df000000000011bfe0 XMM03=b99940f64d477d66000000000011c0b0 XMM04=86490ff74aea40a100000000000ae988 XMM05=dfcdbad4f1609c370000000000133540 XMM06=806171799158d96700000000001333c8 XMM07=e042d86d42eb936e0000000000123c50 XMM08=b99940f64d477d66000000000011c0b0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000