syzkaller login: [ 33.181903] BUG: Bad rss-counter state mm:000000000b0d2579 type:MM_FILEPAGES val:33 [ 33.183171] BUG: Bad rss-counter state mm:000000000b0d2579 type:MM_ANONPAGES val:22 [ 33.349520] ================================================================== [ 33.350613] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.351546] Read of size 8 at addr ffff88800f71d3f8 by task sshd/220 [ 33.352422] [ 33.352648] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.353507] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.354518] Call Trace: [ 33.354837] [ 33.355123] dump_stack_lvl+0x91/0xf0 [ 33.355612] print_report+0xcc/0x620 [ 33.356094] ? __virt_addr_valid+0x102/0x340 [ 33.356641] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.357254] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.357871] kasan_report+0xbe/0xf0 [ 33.358363] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.358983] vma_interval_tree_remove+0xc75/0xec0 [ 33.359582] vma_prepare+0xc54/0x11a0 [ 33.360058] __split_vma+0x5af/0x950 [ 33.360529] ? __pfx___split_vma+0x10/0x10 [ 33.361054] ? find_held_lock+0x2c/0x110 [ 33.361573] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.362138] ? lock_is_held_type+0x9f/0x120 [ 33.362682] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.363286] ? mtree_range_walk+0x632/0x900 [ 33.363838] ? mas_walk+0x5c7/0x7c0 [ 33.364321] do_vmi_munmap+0x1f1/0x2b0 [ 33.364810] mmap_region+0x1f9/0x2660 [ 33.365292] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.365811] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.366534] ? __pfx_lock_acquire+0x10/0x10 [ 33.367060] ? __pfx_mmap_region+0x10/0x10 [ 33.367594] ? security_mmap_addr+0x7d/0xa0 [ 33.368121] ? get_unmapped_area+0x1f5/0x3f0 [ 33.368671] do_mmap+0x854/0xf00 [ 33.369106] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.369599] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.370156] ksys_mmap_pgoff+0x3af/0x500 [ 33.370687] do_syscall_64+0x3f/0x90 [ 33.371160] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.371805] RIP: 0033:0x7f78b8f36d82 [ 33.372262] 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 [ 33.374402] RSP: 002b:00007fff50aa8528 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.375308] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f78b8f36d82 [ 33.376151] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f78b8370000 [ 33.376993] RBP: 00007f78b8370000 R08: 0000000000000009 R09: 0000000000001000 [ 33.377834] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b9e9125ec0 [ 33.378703] R13: 00007fff50aa8540 R14: 00007fff50aa8570 R15: 00007fff50aa88d0 [ 33.379563] [ 33.379853] [ 33.380078] Allocated by task 213: [ 33.380517] kasan_save_stack+0x22/0x50 [ 33.381028] kasan_set_track+0x25/0x30 [ 33.381533] __kasan_slab_alloc+0x59/0x70 [ 33.382058] kmem_cache_alloc+0x16b/0x370 [ 33.382581] vm_area_dup+0x20/0x160 [ 33.383038] __split_vma+0x170/0x950 [ 33.383507] split_vma+0xc6/0x110 [ 33.383945] mprotect_fixup+0x8d2/0xb30 [ 33.384456] do_mprotect_pkey+0x87e/0xd40 [ 33.384973] __x64_sys_mprotect+0x78/0xc0 [ 33.385494] do_syscall_64+0x3f/0x90 [ 33.385969] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.386629] [ 33.386843] Freed by task 13: [ 33.387227] kasan_save_stack+0x22/0x50 [ 33.387734] kasan_set_track+0x25/0x30 [ 33.388229] kasan_save_free_info+0x2b/0x50 [ 33.388768] __kasan_slab_free+0x10a/0x190 [ 33.389301] kmem_cache_free+0x10d/0x4d0 [ 33.389811] rcu_core+0x8c8/0x2860 [ 33.390280] __do_softirq+0x1b7/0x7d4 [ 33.390772] [ 33.390992] Last potentially related work creation: [ 33.391586] kasan_save_stack+0x22/0x50 [ 33.392092] __kasan_record_aux_stack+0x8e/0xa0 [ 33.392677] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.393374] remove_vma+0x139/0x170 [ 33.393824] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.394392] do_vmi_munmap+0x1f1/0x2b0 [ 33.394882] __vm_munmap+0x138/0x3a0 [ 33.395347] __x64_sys_munmap+0x59/0x80 [ 33.395841] do_syscall_64+0x3f/0x90 [ 33.396312] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.396952] [ 33.397167] The buggy address belongs to the object at ffff88800f71d3a0 [ 33.397167] which belongs to the cache vm_area_struct of size 168 [ 33.398648] The buggy address is located 88 bytes inside of [ 33.398648] freed 168-byte region [ffff88800f71d3a0, ffff88800f71d448) [ 33.400057] [ 33.400281] The buggy address belongs to the physical page: [ 33.400947] page:0000000052520e69 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf71d [ 33.402036] memcg:ffff88800c5bab01 [ 33.402481] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.403127] page_type: 0xffffffff() [ 33.403576] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 33.404498] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c5bab01 [ 33.405412] page dumped because: kasan: bad access detected [ 33.406071] [ 33.406295] Memory state around the buggy address: [ 33.406876] ffff88800f71d280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 33.407734] ffff88800f71d300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 33.408589] >ffff88800f71d380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 33.409451] ^ [ 33.410311] ffff88800f71d400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 33.411211] ffff88800f71d480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.412061] ================================================================== [ 33.412980] Disabling lock debugging due to kernel taint [ 35.317065] BUG: Bad rss-counter state mm:000000007dc0496d type:MM_FILEPAGES val:33 [ 35.318547] BUG: Bad rss-counter state mm:000000007dc0496d type:MM_ANONPAGES val:22 [ 35.901507] BUG: Bad rss-counter state mm:00000000d43eaa30 type:MM_FILEPAGES val:33 [ 35.902684] BUG: Bad rss-counter state mm:00000000d43eaa30 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:13236' (ECDSA) to the list of known hosts. 2023/06/19 20:52:28 fuzzer started 2023/06/19 20:52:29 dialing manager at localhost:44161 2023/06/19 20:52:29 checking machine... 2023/06/19 20:52:29 checking revisions... [ 36.611276] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:52:29 testing simple program... [ 36.670979] cgroup: Unknown subsys name 'net' [ 36.719172] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:52:26 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffffffff819766b9 RCX=0000000000000001 RDX=1ffff11002bd6e9a RSI=ffff888015eb79d8 RDI=ffffffff819766b9 RBP=ffffffff819766b9 RSP=ffff888015eb7440 R8 =0000000000000001 R9 =ffff888015eb74b8 R10=0000000000038001 R11=0000000000025fbc R12=ffff888015eb7540 R13=0000000000000000 R14=ffff888015d49b40 R15=0000000000092c40 RIP=ffffffff811fc7be RFL=00000292 [--S-A--] 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 00007f9e85284700 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=00007ff7494e30b0 CR3=000000000c59a000 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=2038323a32353a3032203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038323a32353a3032203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000138 RBX=ffff88800e6c6c48 RCX=ffffffff812e00e5 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800e6c6c80 RBP=ffff8880190d3d60 RSP=ffff88806cf09dd8 R8 =0000000000000001 R9 =ffffed100d9e13af R10=0000000000000003 R11=0000000000000000 R12=dffffc0000000000 R13=ffff8880190daa48 R14=ffffffff813782a8 R15=ffff88800db54880 RIP=ffffffff8184638b RFL=00000046 [---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 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=00007fc9d55cacc0 CR3=000000000ed66000 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=a463ec21d4ff81a6b746b044e5770977 XMM02=2c67c8bc2e329bc3000000000011fa18 XMM03=fb795ef6d657705600000000001241b8 XMM04=1ae52044968332a200000000000ae988 XMM05=19e9129bd510f2350000000000133dd0 XMM06=4fda316b135da52b0000000000133c58 XMM07=e042d86d42eb936e0000000000124438 XMM08=ac30874be75deca4000000000011fa78 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000