syzkaller login: [ 43.811199] BUG: Bad rss-counter state mm:00000000fc666950 type:MM_FILEPAGES val:33 [ 43.812014] BUG: Bad rss-counter state mm:00000000fc666950 type:MM_ANONPAGES val:22 [ 43.938507] ================================================================== [ 43.939230] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 43.939964] Read of size 8 at addr ffff88800cb65228 by task sshd/219 [ 43.940564] [ 43.940730] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 43.941548] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 43.942334] Call Trace: [ 43.942582] [ 43.942800] dump_stack_lvl+0x91/0xf0 [ 43.943179] print_report+0xcc/0x620 [ 43.943550] ? __virt_addr_valid+0x102/0x340 [ 43.944013] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.944480] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.944871] kasan_report+0xbe/0xf0 [ 43.945179] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.945577] vma_interval_tree_remove+0xc75/0xec0 [ 43.945975] vma_prepare+0xc54/0x11a0 [ 43.946289] __split_vma+0x5af/0x950 [ 43.946609] ? __pfx___split_vma+0x10/0x10 [ 43.946959] ? find_held_lock+0x2c/0x110 [ 43.947311] do_vmi_align_munmap+0x2ba/0x11f0 [ 43.947689] ? lock_is_held_type+0x9f/0x120 [ 43.948054] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 43.948476] ? mtree_range_walk+0x632/0x900 [ 43.948839] ? mas_walk+0x5c7/0x7c0 [ 43.949175] do_vmi_munmap+0x1f1/0x2b0 [ 43.949496] mmap_region+0x1f9/0x2660 [ 43.949834] ? vm_mmap_pgoff+0x15c/0x3a0 [ 43.950201] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 43.950679] ? __pfx_lock_acquire+0x10/0x10 [ 43.951046] ? __pfx_mmap_region+0x10/0x10 [ 43.951403] ? security_mmap_addr+0x7d/0xa0 [ 43.951771] ? get_unmapped_area+0x1f5/0x3f0 [ 43.952145] do_mmap+0x854/0xf00 [ 43.952448] vm_mmap_pgoff+0x1a6/0x3a0 [ 43.952787] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 43.953165] ksys_mmap_pgoff+0x3af/0x500 [ 43.953511] do_syscall_64+0x3f/0x90 [ 43.953839] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.954288] RIP: 0033:0x7f28caf0dd82 [ 43.954613] 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 [ 43.956099] RSP: 002b:00007ffe5bd49f28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 43.956748] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f28caf0dd82 [ 43.957348] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f28ca347000 [ 43.957936] RBP: 00007f28ca347000 R08: 0000000000000009 R09: 0000000000001000 [ 43.958526] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bac882af70 [ 43.959104] R13: 00007ffe5bd49f40 R14: 00007ffe5bd49f70 R15: 00007ffe5bd4a2d0 [ 43.959662] [ 43.959858] [ 43.960002] Allocated by task 212: [ 43.960281] kasan_save_stack+0x22/0x50 [ 43.960607] kasan_set_track+0x25/0x30 [ 43.960924] __kasan_slab_alloc+0x59/0x70 [ 43.961265] kmem_cache_alloc+0x16b/0x370 [ 43.961597] vm_area_dup+0x20/0x160 [ 43.961894] __split_vma+0x170/0x950 [ 43.962205] split_vma+0xc6/0x110 [ 43.962488] mprotect_fixup+0x8d2/0xb30 [ 43.962818] do_mprotect_pkey+0x87e/0xd40 [ 43.963149] __x64_sys_mprotect+0x78/0xc0 [ 43.963480] do_syscall_64+0x3f/0x90 [ 43.963799] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.964231] [ 43.964370] Freed by task 212: [ 43.964625] kasan_save_stack+0x22/0x50 [ 43.964963] kasan_set_track+0x25/0x30 [ 43.965278] kasan_save_free_info+0x2b/0x50 [ 43.965621] __kasan_slab_free+0x10a/0x190 [ 43.965980] kmem_cache_free+0x10d/0x4d0 [ 43.966308] rcu_core+0x8c8/0x2860 [ 43.966601] __do_softirq+0x1b7/0x7d4 [ 43.966919] [ 43.967059] Last potentially related work creation: [ 43.967432] kasan_save_stack+0x22/0x50 [ 43.967761] __kasan_record_aux_stack+0x8e/0xa0 [ 43.968133] __call_rcu_common.constprop.0+0x6a/0xb90 [ 43.968543] remove_vma+0x139/0x170 [ 43.968829] do_vmi_align_munmap+0xd4a/0x11f0 [ 43.969181] do_vmi_munmap+0x1f1/0x2b0 [ 43.969485] __vm_munmap+0x138/0x3a0 [ 43.969793] __x64_sys_munmap+0x59/0x80 [ 43.970129] do_syscall_64+0x3f/0x90 [ 43.970446] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.970888] [ 43.971033] The buggy address belongs to the object at ffff88800cb651d0 [ 43.971033] which belongs to the cache vm_area_struct of size 168 [ 43.972051] The buggy address is located 88 bytes inside of [ 43.972051] freed 168-byte region [ffff88800cb651d0, ffff88800cb65278) [ 43.973000] [ 43.973151] The buggy address belongs to the physical page: [ 43.973602] page:00000000eebcd55d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcb65 [ 43.974336] memcg:ffff88800caf9201 [ 43.974626] flags: 0x100000000000200(slab|node=0|zone=1) [ 43.975072] page_type: 0xffffffff() [ 43.975378] raw: 0100000000000200 ffff88800879fc80 ffffea0000382ec0 dead000000000006 [ 43.976021] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800caf9201 [ 43.976645] page dumped because: kasan: bad access detected [ 43.977096] [ 43.977236] Memory state around the buggy address: [ 43.977634] ffff88800cb65100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 43.978210] ffff88800cb65180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 43.978797] >ffff88800cb65200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 43.979382] ^ [ 43.979786] ffff88800cb65280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 43.980375] ffff88800cb65300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 43.980952] ================================================================== [ 43.981583] Disabling lock debugging due to kernel taint [ 46.297337] BUG: Bad rss-counter state mm:0000000024554843 type:MM_FILEPAGES val:33 [ 46.298320] BUG: Bad rss-counter state mm:0000000024554843 type:MM_ANONPAGES val:22 [ 46.739778] BUG: Bad rss-counter state mm:00000000d11d5bf0 type:MM_FILEPAGES val:33 [ 46.740781] BUG: Bad rss-counter state mm:00000000d11d5bf0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:2158' (ECDSA) to the list of known hosts. 2023/06/19 22:12:39 fuzzer started 2023/06/19 22:12:39 dialing manager at localhost:44161 2023/06/19 22:12:39 checking machine... 2023/06/19 22:12:39 checking revisions... [ 47.397948] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:12:39 testing simple program... [ 47.446412] cgroup: Unknown subsys name 'net' [ 47.498092] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:12:26 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88800fbe7940 RCX=0000000000000001 RDX=1ffff11001f7ce94 RSI=ffff88800fbe7910 RDI=ffff88800fbe74a0 RBP=ffff88800fbe7a28 RSP=ffff88800fbe7428 R8 =0000000000000001 R9 =ffff88800fbe74d8 R10=0000000000038001 R11=000000000008b5ce R12=ffff88800fbe74f8 R13=ffff88800fbe74e0 R14=ffff88800fbe7910 R15=ffff88800fbe7498 RIP=ffffffff81131c83 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 00007effd5a4f900 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=00007ffde08ed000 CR3=0000000019d7c000 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=2039333a32313a3232203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039333a32313a3232203931 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=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=00007ff1e71d9000 CR3=000000000c9a8000 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=566f6cc3842fb59f714ee50dff64d292 XMM02=ec2efd57dc4c00df000000000011f948 XMM03=130b2f29fe9b74ad000000000011fa18 XMM04=e5e77f3f8a97231500000000000ae988 XMM05=b6a508aca7c2363c0000000000134068 XMM06=806171799158d9670000000000133a60 XMM07=e042d86d42eb936e0000000000124300 XMM08=130b2f29fe9b74ad000000000011fa18 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000