syzkaller login: [ 31.348683] BUG: Bad rss-counter state mm:00000000ffbc3eeb type:MM_FILEPAGES val:33 [ 31.350230] BUG: Bad rss-counter state mm:00000000ffbc3eeb type:MM_ANONPAGES val:22 [ 31.503239] ================================================================== [ 31.504096] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.504996] Read of size 8 at addr ffff88800eca8058 by task sshd/220 [ 31.505721] [ 31.505929] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.506887] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.507838] Call Trace: [ 31.508140] [ 31.508440] dump_stack_lvl+0x91/0xf0 [ 31.508911] print_report+0xcc/0x620 [ 31.509425] ? __virt_addr_valid+0x102/0x340 [ 31.509971] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.510571] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.511214] kasan_report+0xbe/0xf0 [ 31.511687] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.512389] vma_interval_tree_remove+0xc75/0xec0 [ 31.513107] vma_prepare+0xc54/0x11a0 [ 31.513611] __split_vma+0x5af/0x950 [ 31.514082] ? __pfx___split_vma+0x10/0x10 [ 31.514615] ? find_held_lock+0x2c/0x110 [ 31.515148] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.515724] ? lock_is_held_type+0x9f/0x120 [ 31.516278] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.516901] ? mtree_range_walk+0x632/0x900 [ 31.517499] ? mas_walk+0x5c7/0x7c0 [ 31.518050] do_vmi_munmap+0x1f1/0x2b0 [ 31.518563] mmap_region+0x1f9/0x2660 [ 31.519044] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.519573] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.520312] ? __pfx_lock_acquire+0x10/0x10 [ 31.520860] ? __pfx_mmap_region+0x10/0x10 [ 31.521425] ? security_mmap_addr+0x7d/0xa0 [ 31.521953] ? get_unmapped_area+0x1f5/0x3f0 [ 31.522512] do_mmap+0x854/0xf00 [ 31.522948] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.523446] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.524013] ksys_mmap_pgoff+0x3af/0x500 [ 31.524530] do_syscall_64+0x3f/0x90 [ 31.525022] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.525676] RIP: 0033:0x7f6b0f572d82 [ 31.526136] 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 [ 31.528236] RSP: 002b:00007fffd183e018 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.529153] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6b0f572d82 [ 31.530000] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6b0e9ac000 [ 31.530840] RBP: 00007f6b0e9ac000 R08: 0000000000000009 R09: 0000000000001000 [ 31.531683] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558d842dbec0 [ 31.532519] R13: 00007fffd183e030 R14: 00007fffd183e060 R15: 00007fffd183e3c0 [ 31.533378] [ 31.533670] [ 31.533890] Allocated by task 212: [ 31.534317] kasan_save_stack+0x22/0x50 [ 31.534820] kasan_set_track+0x25/0x30 [ 31.535313] __kasan_slab_alloc+0x59/0x70 [ 31.535830] kmem_cache_alloc+0x16b/0x370 [ 31.536342] vm_area_dup+0x20/0x160 [ 31.536796] __split_vma+0x170/0x950 [ 31.537283] split_vma+0xc6/0x110 [ 31.537724] mprotect_fixup+0x8d2/0xb30 [ 31.538221] do_mprotect_pkey+0x87e/0xd40 [ 31.538736] __x64_sys_mprotect+0x78/0xc0 [ 31.539252] do_syscall_64+0x3f/0x90 [ 31.539721] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.540350] [ 31.540566] Freed by task 212: [ 31.540963] kasan_save_stack+0x22/0x50 [ 31.541468] kasan_set_track+0x25/0x30 [ 31.541955] kasan_save_free_info+0x2b/0x50 [ 31.542482] __kasan_slab_free+0x10a/0x190 [ 31.543014] kmem_cache_free+0x10d/0x4d0 [ 31.543531] rcu_core+0x8c8/0x2860 [ 31.543989] __do_softirq+0x1b7/0x7d4 [ 31.544446] [ 31.544665] Last potentially related work creation: [ 31.545268] kasan_save_stack+0x22/0x50 [ 31.545771] __kasan_record_aux_stack+0x8e/0xa0 [ 31.546339] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.546980] remove_vma+0x139/0x170 [ 31.547429] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.547990] do_vmi_munmap+0x1f1/0x2b0 [ 31.548475] __vm_munmap+0x138/0x3a0 [ 31.548962] __x64_sys_munmap+0x59/0x80 [ 31.549459] do_syscall_64+0x3f/0x90 [ 31.549935] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.550573] [ 31.550795] The buggy address belongs to the object at ffff88800eca8000 [ 31.550795] which belongs to the cache vm_area_struct of size 168 [ 31.552267] The buggy address is located 88 bytes inside of [ 31.552267] freed 168-byte region [ffff88800eca8000, ffff88800eca80a8) [ 31.553665] [ 31.553884] The buggy address belongs to the physical page: [ 31.554534] page:000000009d004397 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeca8 [ 31.555607] memcg:ffff888013eaeb01 [ 31.556035] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.556676] page_type: 0xffffffff() [ 31.557156] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.558063] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888013eaeb01 [ 31.558976] page dumped because: kasan: bad access detected [ 31.559626] [ 31.559840] Memory state around the buggy address: [ 31.560413] ffff88800eca7f00: 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc fc [ 31.561266] ffff88800eca7f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.562116] >ffff88800eca8000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.562959] ^ [ 31.563675] ffff88800eca8080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 31.564541] ffff88800eca8100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.565400] ================================================================== [ 31.566375] Disabling lock debugging due to kernel taint [ 33.542439] BUG: Bad rss-counter state mm:000000007b4f1d60 type:MM_FILEPAGES val:33 [ 33.543622] BUG: Bad rss-counter state mm:000000007b4f1d60 type:MM_ANONPAGES val:22 [ 33.980228] BUG: Bad rss-counter state mm:00000000c0d8dc38 type:MM_FILEPAGES val:33 [ 33.981337] BUG: Bad rss-counter state mm:00000000c0d8dc38 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:26710' (ECDSA) to the list of known hosts. 2023/06/19 14:24:49 fuzzer started 2023/06/19 14:24:49 dialing manager at localhost:44161 2023/06/19 14:24:49 checking machine... 2023/06/19 14:24:49 checking revisions... [ 34.715042] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:24:49 testing simple program... [ 34.764659] cgroup: Unknown subsys name 'net' [ 34.817016] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:24:48 Registers: info registers vcpu 0 RAX=0000000080000001 RBX=0000000000000006 RCX=ffffffff81b2b658 RDX=0000000000000020 RSI=0000000000000000 RDI=0000000000000003 RBP=ffff888015eee5c0 RSP=ffff8880147bf728 R8 =0000000000000003 R9 =0000000000000000 R10=0000000000000020 R11=00000000000b6c88 R12=ffff88800df19200 R13=ffff88800df19264 R14=0000000000000020 R15=ffff888015eee34c RIP=ffffffff814c01d0 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fb6f33d6900 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=00007fb6f27c8e80 CR3=0000000009a04000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=b854db46c6174da500000000000ae988 XMM05=cf6e5ecc25cf70d30000000000134e78 XMM06=19e9129bd510f2350000000000133d10 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff1100134c8f0 RBX=0000000000000000 RCX=ffffffff83ab403d RDX=0000000000000000 RSI=0000000000000004 RDI=ffffffff87f9468c RBP=000000002715c19b RSP=ffff888016a07508 R8 =0000000000000000 R9 =fffffbfff0ff29c8 R10=ffffffff87f94e43 R11=000009d1000009d1 R12=0000000000000000 R13=00000000000000f0 R14=dffffc0000000000 R15=ffffffff87f94640 RIP=ffffffff83ab40cc 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 00007ff786776900 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=00007ff786d2d618 CR3=000000000ca32000 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