syzkaller login: [ 39.756487] BUG: Bad rss-counter state mm:000000001432abac type:MM_FILEPAGES val:33 [ 39.758008] BUG: Bad rss-counter state mm:000000001432abac type:MM_ANONPAGES val:22 [ 39.905508] ================================================================== [ 39.906398] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.907330] Read of size 8 at addr ffff88800dc33058 by task sshd/219 [ 39.908093] [ 39.908307] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.909309] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.910265] Call Trace: [ 39.910584] [ 39.910862] dump_stack_lvl+0x91/0xf0 [ 39.911342] print_report+0xcc/0x620 [ 39.911851] ? __virt_addr_valid+0x102/0x340 [ 39.912399] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.913018] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.913627] kasan_report+0xbe/0xf0 [ 39.914102] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.914725] vma_interval_tree_remove+0xc75/0xec0 [ 39.915324] vma_prepare+0xc54/0x11a0 [ 39.915806] __split_vma+0x5af/0x950 [ 39.916276] ? __pfx___split_vma+0x10/0x10 [ 39.916802] ? find_held_lock+0x2c/0x110 [ 39.917322] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.917882] ? lock_is_held_type+0x9f/0x120 [ 39.918412] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.919014] ? mtree_range_walk+0x632/0x900 [ 39.919568] ? mas_walk+0x5c7/0x7c0 [ 39.920037] do_vmi_munmap+0x1f1/0x2b0 [ 39.920522] mmap_region+0x1f9/0x2660 [ 39.921000] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.921504] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.922206] ? __pfx_lock_acquire+0x10/0x10 [ 39.922738] ? __pfx_mmap_region+0x10/0x10 [ 39.923262] ? security_mmap_addr+0x7d/0xa0 [ 39.923807] ? get_unmapped_area+0x1f5/0x3f0 [ 39.924348] do_mmap+0x854/0xf00 [ 39.924788] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.925278] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.925834] ksys_mmap_pgoff+0x3af/0x500 [ 39.926338] do_syscall_64+0x3f/0x90 [ 39.926810] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.927459] RIP: 0033:0x7fa657e86d82 [ 39.927915] 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 [ 39.930023] RSP: 002b:00007ffc91183b98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.930957] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa657e86d82 [ 39.931888] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa6572c0000 [ 39.932801] RBP: 00007fa6572c0000 R08: 0000000000000009 R09: 0000000000001000 [ 39.933711] R10: 0000000000000812 R11: 0000000000000206 R12: 000055710c29cf70 [ 39.934619] R13: 00007ffc91183bb0 R14: 00007ffc91183be0 R15: 00007ffc91183f40 [ 39.935555] [ 39.935866] [ 39.936096] Allocated by task 212: [ 39.936553] kasan_save_stack+0x22/0x50 [ 39.937093] kasan_set_track+0x25/0x30 [ 39.937616] __kasan_slab_alloc+0x59/0x70 [ 39.938183] kmem_cache_alloc+0x16b/0x370 [ 39.938741] vm_area_dup+0x20/0x160 [ 39.939227] __split_vma+0x170/0x950 [ 39.939729] split_vma+0xc6/0x110 [ 39.940224] mprotect_fixup+0x8d2/0xb30 [ 39.940726] do_mprotect_pkey+0x87e/0xd40 [ 39.941257] __x64_sys_mprotect+0x78/0xc0 [ 39.941796] do_syscall_64+0x3f/0x90 [ 39.942284] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.942940] [ 39.943168] Freed by task 212: [ 39.943592] kasan_save_stack+0x22/0x50 [ 39.944116] kasan_set_track+0x25/0x30 [ 39.944621] kasan_save_free_info+0x2b/0x50 [ 39.945174] __kasan_slab_free+0x10a/0x190 [ 39.945724] kmem_cache_free+0x10d/0x4d0 [ 39.946255] rcu_core+0x8c8/0x2860 [ 39.946711] __do_softirq+0x1b7/0x7d4 [ 39.947201] [ 39.947428] Last potentially related work creation: [ 39.948033] kasan_save_stack+0x22/0x50 [ 39.948552] __kasan_record_aux_stack+0x8e/0xa0 [ 39.949138] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.949871] remove_vma+0x139/0x170 [ 39.950346] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.950915] do_vmi_munmap+0x1f1/0x2b0 [ 39.951445] __vm_munmap+0x138/0x3a0 [ 39.951925] __x64_sys_munmap+0x59/0x80 [ 39.952438] do_syscall_64+0x3f/0x90 [ 39.952924] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.953586] [ 39.953806] Second to last potentially related work creation: [ 39.954510] kasan_save_stack+0x22/0x50 [ 39.955027] __kasan_record_aux_stack+0x8e/0xa0 [ 39.955626] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.956291] remove_vma+0x139/0x170 [ 39.956761] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.957339] do_vmi_munmap+0x1f1/0x2b0 [ 39.957845] mmap_region+0x1f9/0x2660 [ 39.958332] do_mmap+0x854/0xf00 [ 39.958779] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.959286] ksys_mmap_pgoff+0x3af/0x500 [ 39.959813] do_syscall_64+0x3f/0x90 [ 39.960302] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.960959] [ 39.961183] The buggy address belongs to the object at ffff88800dc33000 [ 39.961183] which belongs to the cache vm_area_struct of size 168 [ 39.962707] The buggy address is located 88 bytes inside of [ 39.962707] freed 168-byte region [ffff88800dc33000, ffff88800dc330a8) [ 39.964178] [ 39.964399] The buggy address belongs to the physical page: [ 39.965082] page:0000000058e9955d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdc33 [ 39.966195] memcg:ffff88800de6d401 [ 39.966631] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 39.967354] page_type: 0xffffffff() [ 39.967829] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 39.968778] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800de6d401 [ 39.969713] page dumped because: kasan: bad access detected [ 39.970400] [ 39.970619] Memory state around the buggy address: [ 39.971222] ffff88800dc32f00: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc [ 39.972113] ffff88800dc32f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 39.972990] >ffff88800dc33000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.973865] ^ [ 39.974609] ffff88800dc33080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 39.975520] ffff88800dc33100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.976402] ================================================================== [ 39.977381] Disabling lock debugging due to kernel taint [ 41.915465] BUG: Bad rss-counter state mm:0000000090e1991b type:MM_FILEPAGES val:33 [ 41.916322] BUG: Bad rss-counter state mm:0000000090e1991b type:MM_ANONPAGES val:22 [ 42.465797] BUG: Bad rss-counter state mm:0000000082aac040 type:MM_FILEPAGES val:33 [ 42.466910] BUG: Bad rss-counter state mm:0000000082aac040 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:63696' (ECDSA) to the list of known hosts. 2023/06/19 20:35:32 fuzzer started 2023/06/19 20:35:32 dialing manager at localhost:44161 2023/06/19 20:35:32 checking machine... 2023/06/19 20:35:32 checking revisions... [ 43.074451] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:35:33 testing simple program... [ 43.115168] cgroup: Unknown subsys name 'net' [ 43.154119] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:35:28 Registers: info registers vcpu 0 RAX=0000000000000011 RBX=ffffed1001935e53 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000000 RDI=ffffffff85d3bed0 RBP=ffff888008442140 RSP=ffff88800c9af298 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000082cc0 R13=0000000000082cc0 R14=ffffffff8366cbd9 R15=0000000000001000 RIP=ffffffff813ad6f0 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 00007f5852fa7900 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=00007f585355e618 CR3=0000000017dfc000 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=2032333a35333a3032203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032333a35333a3032203931 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=00007fcab60c0a90 CR3=000000000cd72000 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=99ea612510916bb7be4749623ce4426a XMM02=2c67c8bc2e329bc3000000000011c9b8 XMM03=fb795ef6d65770560000000000123708 XMM04=7d36fdc6ad4e5e3400000000000ae988 XMM05=19e9129bd510f23500000000001343a0 XMM06=4fda316b135da52b0000000000134228 XMM07=e042d86d42eb936e0000000000123988 XMM08=043f7a2e81540720000000000011ca18 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000