syzkaller login: [ 30.406921] BUG: Bad rss-counter state mm:0000000097eb651d type:MM_FILEPAGES val:33 [ 30.408123] BUG: Bad rss-counter state mm:0000000097eb651d type:MM_ANONPAGES val:22 [ 30.444754] ================================================================== [ 30.445459] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.446324] Read of size 8 at addr ffff888019d1eed8 by task sshd/221 [ 30.446934] [ 30.447099] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.447773] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.448533] Call Trace: [ 30.448775] [ 30.448990] dump_stack_lvl+0x91/0xf0 [ 30.449382] print_report+0xcc/0x620 [ 30.449752] ? __virt_addr_valid+0x102/0x340 [ 30.450170] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.450639] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.451115] kasan_report+0xbe/0xf0 [ 30.451479] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.451954] vma_interval_tree_remove+0xc75/0xec0 [ 30.452417] vma_prepare+0xc54/0x11a0 [ 30.452781] __split_vma+0x5af/0x950 [ 30.453148] ? __pfx___split_vma+0x10/0x10 [ 30.453552] ? find_held_lock+0x2c/0x110 [ 30.453950] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.454387] ? lock_is_held_type+0x9f/0x120 [ 30.454803] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.455273] ? mtree_range_walk+0x632/0x900 [ 30.455809] ? mas_walk+0x5c7/0x7c0 [ 30.456191] do_vmi_munmap+0x1f1/0x2b0 [ 30.456571] mmap_region+0x1f9/0x2660 [ 30.456944] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.457359] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.457921] ? __pfx_lock_acquire+0x10/0x10 [ 30.458333] ? __pfx_mmap_region+0x10/0x10 [ 30.458740] ? security_mmap_addr+0x7d/0xa0 [ 30.459151] ? get_unmapped_area+0x1f5/0x3f0 [ 30.459575] do_mmap+0x854/0xf00 [ 30.459913] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.460294] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.460722] ksys_mmap_pgoff+0x3af/0x500 [ 30.461120] do_syscall_64+0x3f/0x90 [ 30.461491] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.461993] RIP: 0033:0x7f71c4645d82 [ 30.462350] 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 [ 30.464071] RSP: 002b:00007fffc4b35388 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.464800] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f71c4645d82 [ 30.465489] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f71c3a7f000 [ 30.466158] RBP: 00007f71c3a7f000 R08: 0000000000000009 R09: 0000000000001000 [ 30.466848] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a781c6af60 [ 30.467523] R13: 00007fffc4b353a0 R14: 00007fffc4b353d0 R15: 00007fffc4b35730 [ 30.468219] [ 30.468447] [ 30.468615] Allocated by task 214: [ 30.468969] kasan_save_stack+0x22/0x50 [ 30.469369] kasan_set_track+0x25/0x30 [ 30.469746] __kasan_slab_alloc+0x59/0x70 [ 30.470155] kmem_cache_alloc+0x16b/0x370 [ 30.470559] vm_area_dup+0x20/0x160 [ 30.470922] __split_vma+0x170/0x950 [ 30.471277] split_vma+0xc6/0x110 [ 30.471612] mprotect_fixup+0x8d2/0xb30 [ 30.471994] do_mprotect_pkey+0x87e/0xd40 [ 30.472396] __x64_sys_mprotect+0x78/0xc0 [ 30.472796] do_syscall_64+0x3f/0x90 [ 30.473171] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.473667] [ 30.473832] Freed by task 214: [ 30.474134] kasan_save_stack+0x22/0x50 [ 30.474519] kasan_set_track+0x25/0x30 [ 30.474897] kasan_save_free_info+0x2b/0x50 [ 30.475310] __kasan_slab_free+0x10a/0x190 [ 30.475718] kmem_cache_free+0x10d/0x4d0 [ 30.476109] rcu_core+0x8c8/0x2860 [ 30.476453] __do_softirq+0x1b7/0x7d4 [ 30.476835] [ 30.477009] Last potentially related work creation: [ 30.477488] kasan_save_stack+0x22/0x50 [ 30.477869] __kasan_record_aux_stack+0x8e/0xa0 [ 30.478318] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.478822] remove_vma+0x139/0x170 [ 30.479184] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.479611] do_vmi_munmap+0x1f1/0x2b0 [ 30.479980] __vm_munmap+0x138/0x3a0 [ 30.480339] __x64_sys_munmap+0x59/0x80 [ 30.480716] do_syscall_64+0x3f/0x90 [ 30.481072] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.481572] [ 30.481737] The buggy address belongs to the object at ffff888019d1ee80 [ 30.481737] which belongs to the cache vm_area_struct of size 168 [ 30.482874] The buggy address is located 88 bytes inside of [ 30.482874] freed 168-byte region [ffff888019d1ee80, ffff888019d1ef28) [ 30.483952] [ 30.484128] The buggy address belongs to the physical page: [ 30.484638] page:000000008faf16c6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19d1e [ 30.485488] memcg:ffff888009a55e01 [ 30.485824] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.486351] page_type: 0xffffffff() [ 30.486702] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.487420] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009a55e01 [ 30.488123] page dumped because: kasan: bad access detected [ 30.488635] [ 30.488803] Memory state around the buggy address: [ 30.489272] ffff888019d1ed80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.489928] ffff888019d1ee00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 30.490592] >ffff888019d1ee80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.491252] ^ [ 30.491818] ffff888019d1ef00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 30.492493] ffff888019d1ef80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.493195] ================================================================== [ 30.494141] Disabling lock debugging due to kernel taint [ 32.534526] BUG: Bad rss-counter state mm:0000000041475568 type:MM_FILEPAGES val:33 [ 32.535559] BUG: Bad rss-counter state mm:0000000041475568 type:MM_ANONPAGES val:22 [ 32.984274] BUG: Bad rss-counter state mm:000000003eb0ec7f type:MM_FILEPAGES val:33 [ 32.985442] BUG: Bad rss-counter state mm:000000003eb0ec7f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:44304' (ECDSA) to the list of known hosts. 2023/06/20 11:36:01 fuzzer started 2023/06/20 11:36:01 dialing manager at localhost:36067 2023/06/20 11:36:01 checking machine... 2023/06/20 11:36:01 checking revisions... [ 33.743012] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:36:01 testing simple program... [ 33.784406] cgroup: Unknown subsys name 'net' [ 33.835665] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:36:01 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff8880162672d0 RCX=0000000000000001 RDX=0000000000000000 RSI=ffffffff83871c52 RDI=ffff8880162672dc RBP=0000000000000009 RSP=ffff8880162671e8 R8 =0000000000000001 R9 =ffff888016267248 R10=0000000000038001 R11=0000000000091be9 R12=ffff8880162672d0 R13=0000000000000000 R14=ffff88800f530000 R15=0000000000000cc0 RIP=ffffffff813ad4ee RFL=00000213 [----A-C] 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 00007fa9f46a3900 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=00007ffd317c3000 CR3=00000000181cc000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=0000000000000001 RCX=ffffffff815343f6 RDX=fffffbfff0ba7a6b RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffffffff81839db7 RSP=ffff88806cf09da0 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000000 R12=ffff88807ffdc000 R13=0000000000000006 R14=00000000fffffd78 R15=ffff88800da31a00 RIP=ffffffff815343f6 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=00007f075797f520 CR3=000000000dc20000 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=2030303a36333a3131203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030303a36333a3131203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000