syzkaller login: [ 34.353697] BUG: Bad rss-counter state mm:000000007c481cea type:MM_FILEPAGES val:33 [ 34.355068] BUG: Bad rss-counter state mm:000000007c481cea type:MM_ANONPAGES val:22 [ 34.517881] ================================================================== [ 34.518898] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.519957] Read of size 8 at addr ffff88800f1c1ed8 by task sshd/221 [ 34.520914] [ 34.521151] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.522085] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.523178] Call Trace: [ 34.523525] [ 34.523833] dump_stack_lvl+0x91/0xf0 [ 34.524363] print_report+0xcc/0x620 [ 34.524881] ? __virt_addr_valid+0x102/0x340 [ 34.525482] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.526144] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.526825] kasan_report+0xbe/0xf0 [ 34.527351] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.528048] vma_interval_tree_remove+0xc75/0xec0 [ 34.528712] vma_prepare+0xc54/0x11a0 [ 34.529240] __split_vma+0x5af/0x950 [ 34.529764] ? __pfx___split_vma+0x10/0x10 [ 34.530352] ? find_held_lock+0x2c/0x110 [ 34.530940] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.531594] ? lock_is_held_type+0x9f/0x120 [ 34.532170] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.532841] ? mtree_range_walk+0x632/0x900 [ 34.533459] ? mas_walk+0x5c7/0x7c0 [ 34.533990] do_vmi_munmap+0x1f1/0x2b0 [ 34.534540] mmap_region+0x1f9/0x2660 [ 34.535077] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.535674] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.536458] ? __pfx_lock_acquire+0x10/0x10 [ 34.537051] ? __pfx_mmap_region+0x10/0x10 [ 34.537642] ? security_mmap_addr+0x7d/0xa0 [ 34.538237] ? get_unmapped_area+0x1f5/0x3f0 [ 34.538847] do_mmap+0x854/0xf00 [ 34.539345] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.539902] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.540525] ksys_mmap_pgoff+0x3af/0x500 [ 34.541092] do_syscall_64+0x3f/0x90 [ 34.541628] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.542347] RIP: 0033:0x7faea132bd82 [ 34.542859] 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 [ 34.545274] RSP: 002b:00007ffd244bc5e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.546288] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007faea132bd82 [ 34.547240] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007faea0765000 [ 34.548192] RBP: 00007faea0765000 R08: 0000000000000009 R09: 0000000000001000 [ 34.549131] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559272f86ec0 [ 34.550079] R13: 00007ffd244bc600 R14: 00007ffd244bc630 R15: 00007ffd244bc990 [ 34.551019] [ 34.551344] [ 34.551576] Allocated by task 214: [ 34.552045] kasan_save_stack+0x22/0x50 [ 34.552600] kasan_set_track+0x25/0x30 [ 34.553150] __kasan_slab_alloc+0x59/0x70 [ 34.553737] kmem_cache_alloc+0x16b/0x370 [ 34.554304] vm_area_dup+0x20/0x160 [ 34.554808] __split_vma+0x170/0x950 [ 34.555339] split_vma+0xc6/0x110 [ 34.555832] mprotect_fixup+0x8d2/0xb30 [ 34.556381] do_mprotect_pkey+0x87e/0xd40 [ 34.556953] __x64_sys_mprotect+0x78/0xc0 [ 34.557530] do_syscall_64+0x3f/0x90 [ 34.558049] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.558760] [ 34.558993] Freed by task 13: [ 34.559425] kasan_save_stack+0x22/0x50 [ 34.559977] kasan_set_track+0x25/0x30 [ 34.560523] kasan_save_free_info+0x2b/0x50 [ 34.561104] __kasan_slab_free+0x10a/0x190 [ 34.561693] kmem_cache_free+0x10d/0x4d0 [ 34.562247] rcu_core+0x8c8/0x2860 [ 34.562738] __do_softirq+0x1b7/0x7d4 [ 34.563281] [ 34.563520] Last potentially related work creation: [ 34.564164] kasan_save_stack+0x22/0x50 [ 34.564719] __kasan_record_aux_stack+0x8e/0xa0 [ 34.565350] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.566055] remove_vma+0x139/0x170 [ 34.566550] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.567172] do_vmi_munmap+0x1f1/0x2b0 [ 34.567708] __vm_munmap+0x138/0x3a0 [ 34.568220] __x64_sys_munmap+0x59/0x80 [ 34.568763] do_syscall_64+0x3f/0x90 [ 34.569286] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.569994] [ 34.570230] Second to last potentially related work creation: [ 34.570985] kasan_save_stack+0x22/0x50 [ 34.571551] __kasan_record_aux_stack+0x8e/0xa0 [ 34.572182] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.572885] remove_vma+0x139/0x170 [ 34.573381] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.573995] do_vmi_munmap+0x1f1/0x2b0 [ 34.574536] mmap_region+0x1f9/0x2660 [ 34.575061] do_mmap+0x854/0xf00 [ 34.575561] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.576102] ksys_mmap_pgoff+0x7d/0x500 [ 34.576653] do_syscall_64+0x3f/0x90 [ 34.577173] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.577884] [ 34.578120] The buggy address belongs to the object at ffff88800f1c1e80 [ 34.578120] which belongs to the cache vm_area_struct of size 168 [ 34.579747] The buggy address is located 88 bytes inside of [ 34.579747] freed 168-byte region [ffff88800f1c1e80, ffff88800f1c1f28) [ 34.581299] [ 34.581535] The buggy address belongs to the physical page: [ 34.582262] page:000000003d530b0a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf1c1 [ 34.583470] memcg:ffff88800e23de01 [ 34.583949] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.584663] page_type: 0xffffffff() [ 34.585161] raw: 0100000000000200 ffff88800879fc80 ffffea000032bf80 dead000000000002 [ 34.586171] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e23de01 [ 34.587190] page dumped because: kasan: bad access detected [ 34.587929] [ 34.588163] Memory state around the buggy address: [ 34.588807] ffff88800f1c1d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 34.589751] ffff88800f1c1e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 34.590692] >ffff88800f1c1e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.591637] ^ [ 34.592433] ffff88800f1c1f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 34.593374] ffff88800f1c1f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 34.594309] ================================================================== [ 34.595598] Disabling lock debugging due to kernel taint [ 36.468476] BUG: Bad rss-counter state mm:000000004a48ddba type:MM_FILEPAGES val:33 [ 36.470406] BUG: Bad rss-counter state mm:000000004a48ddba type:MM_ANONPAGES val:22 [ 36.966779] BUG: Bad rss-counter state mm:0000000020c2e41c type:MM_FILEPAGES val:33 [ 36.968003] BUG: Bad rss-counter state mm:0000000020c2e41c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:52900' (ECDSA) to the list of known hosts. 2023/06/20 03:10:55 fuzzer started 2023/06/20 03:10:55 dialing manager at localhost:44161 2023/06/20 03:10:55 checking machine... 2023/06/20 03:10:55 checking revisions... [ 37.696468] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:10:55 testing simple program... [ 37.737774] cgroup: Unknown subsys name 'net' [ 37.783162] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:10:51 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=ffffffff852c82b0 RCX=1ffffffff0ba7a02 RDX=0000000000000000 RSI=ffff88801922fe30 RDI=ffff888016a50000 RBP=ffff888016a50000 RSP=ffff88801922fd58 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=0000000000000000 R12=ffff88801922fe30 R13=000000000000006e R14=ffff888016a50000 R15=ffff888019ec7300 RIP=ffffffff81f7a234 RFL=00000286 [--S--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 00007f1b42b85900 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=00007f1b4313a650 CR3=000000000f340000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff11002d5518f RBX=ffff888016aa8c48 RCX=ffffffff812e00e5 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff888016aa8c78 RBP=ffff888019f5e5e0 RSP=ffff88806cf09db8 R8 =0000000000000001 R9 =ffffed100d9e13ab R10=0000000000000003 R11=0000000000000000 R12=dffffc0000000000 R13=ffff888019f4f480 R14=ffffffff818d9dc6 R15=ffff888016969400 RIP=ffffffff81846362 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=00007f29d50163d8 CR3=0000000009a22000 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=2035353a30313a3330203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034353a30313a3330203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000