syzkaller login: [ 30.800892] BUG: Bad rss-counter state mm:000000003aa0880c type:MM_FILEPAGES val:33 [ 30.802156] BUG: Bad rss-counter state mm:000000003aa0880c type:MM_ANONPAGES val:22 [ 30.843249] ================================================================== [ 30.844279] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.845226] Read of size 8 at addr ffff88800c7bc4e0 by task sshd/219 [ 30.846003] [ 30.846226] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.847105] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.848131] Call Trace: [ 30.848456] [ 30.848747] dump_stack_lvl+0x91/0xf0 [ 30.849245] print_report+0xcc/0x620 [ 30.849740] ? __virt_addr_valid+0x102/0x340 [ 30.850299] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.850932] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.851594] kasan_report+0xbe/0xf0 [ 30.852083] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.852730] vma_interval_tree_remove+0xc75/0xec0 [ 30.853336] vma_prepare+0xc54/0x11a0 [ 30.853819] __split_vma+0x5af/0x950 [ 30.854300] ? __pfx___split_vma+0x10/0x10 [ 30.854842] ? find_held_lock+0x2c/0x110 [ 30.855374] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.855948] ? lock_is_held_type+0x9f/0x120 [ 30.856498] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.857105] ? mtree_range_walk+0x632/0x900 [ 30.857655] ? mas_walk+0x5c7/0x7c0 [ 30.858129] do_vmi_munmap+0x1f1/0x2b0 [ 30.858624] mmap_region+0x1f9/0x2660 [ 30.859106] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.859633] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.860352] ? __pfx_lock_acquire+0x10/0x10 [ 30.860885] ? __pfx_mmap_region+0x10/0x10 [ 30.861418] ? security_mmap_addr+0x7d/0xa0 [ 30.861949] ? get_unmapped_area+0x1f5/0x3f0 [ 30.862499] do_mmap+0x854/0xf00 [ 30.862950] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.863476] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.864036] ksys_mmap_pgoff+0x3af/0x500 [ 30.864546] do_syscall_64+0x3f/0x90 [ 30.865025] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.865668] RIP: 0033:0x7fafb6b28d82 [ 30.866125] 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 [ 30.868262] RSP: 002b:00007ffe1a5ce7d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.869186] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fafb6b28d82 [ 30.870041] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fafb5f62000 [ 30.870886] RBP: 00007fafb5f62000 R08: 0000000000000009 R09: 0000000000001000 [ 30.871766] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b749c59980 [ 30.872628] R13: 00007ffe1a5ce7f0 R14: 00007ffe1a5ce820 R15: 00007ffe1a5ceb80 [ 30.873494] [ 30.873789] [ 30.874014] Allocated by task 212: [ 30.874451] kasan_save_stack+0x22/0x50 [ 30.874958] kasan_set_track+0x25/0x30 [ 30.875461] __kasan_slab_alloc+0x59/0x70 [ 30.875987] kmem_cache_alloc+0x16b/0x370 [ 30.876518] vm_area_dup+0x20/0x160 [ 30.876972] __split_vma+0x170/0x950 [ 30.877447] split_vma+0xc6/0x110 [ 30.877901] mprotect_fixup+0x8d2/0xb30 [ 30.878409] do_mprotect_pkey+0x87e/0xd40 [ 30.878942] __x64_sys_mprotect+0x78/0xc0 [ 30.879499] do_syscall_64+0x3f/0x90 [ 30.879971] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.880614] [ 30.880832] Freed by task 212: [ 30.881222] kasan_save_stack+0x22/0x50 [ 30.881725] kasan_set_track+0x25/0x30 [ 30.882218] kasan_save_free_info+0x2b/0x50 [ 30.882753] __kasan_slab_free+0x10a/0x190 [ 30.883300] kmem_cache_free+0x10d/0x4d0 [ 30.883806] rcu_core+0x8c8/0x2860 [ 30.884267] __do_softirq+0x1b7/0x7d4 [ 30.884738] [ 30.884961] Last potentially related work creation: [ 30.885553] kasan_save_stack+0x22/0x50 [ 30.886059] __kasan_record_aux_stack+0x8e/0xa0 [ 30.886634] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.887284] remove_vma+0x139/0x170 [ 30.887739] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.888303] do_vmi_munmap+0x1f1/0x2b0 [ 30.888790] __vm_munmap+0x138/0x3a0 [ 30.889273] __x64_sys_munmap+0x59/0x80 [ 30.889781] do_syscall_64+0x3f/0x90 [ 30.890254] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.890898] [ 30.891117] The buggy address belongs to the object at ffff88800c7bc488 [ 30.891117] which belongs to the cache vm_area_struct of size 168 [ 30.892587] The buggy address is located 88 bytes inside of [ 30.892587] freed 168-byte region [ffff88800c7bc488, ffff88800c7bc530) [ 30.893997] [ 30.894210] The buggy address belongs to the physical page: [ 30.894864] page:000000000899a113 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc7bc [ 30.895950] memcg:ffff888010285301 [ 30.896385] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.897038] page_type: 0xffffffff() [ 30.897485] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 30.898408] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888010285301 [ 30.899331] page dumped because: kasan: bad access detected [ 30.899990] [ 30.900208] Memory state around the buggy address: [ 30.900786] ffff88800c7bc380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.901642] ffff88800c7bc400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 30.902496] >ffff88800c7bc480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.903375] ^ [ 30.904135] ffff88800c7bc500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 30.904994] ffff88800c7bc580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.905845] ================================================================== [ 30.907151] Disabling lock debugging due to kernel taint [ 33.648523] BUG: Bad rss-counter state mm:0000000063601872 type:MM_FILEPAGES val:33 [ 33.649472] BUG: Bad rss-counter state mm:0000000063601872 type:MM_ANONPAGES val:22 [ 34.145012] BUG: Bad rss-counter state mm:00000000abcd8137 type:MM_FILEPAGES val:33 [ 34.146202] BUG: Bad rss-counter state mm:00000000abcd8137 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:37373' (ECDSA) to the list of known hosts. 2023/06/19 21:27:53 fuzzer started 2023/06/19 21:27:53 dialing manager at localhost:44161 2023/06/19 21:27:53 checking machine... 2023/06/19 21:27:53 checking revisions... [ 34.873214] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:27:53 testing simple program... [ 34.919483] cgroup: Unknown subsys name 'net' [ 34.967900] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:27:52 Registers: info registers vcpu 0 RAX=000000000000007b RBX=00007fad837626a0 RCX=00000000000007e7 RDX=000000000000014e RSI=0000000000000003 RDI=00007fad83c7c900 RBP=051eb851eb851eb8 RSP=00007fad83762618 R8 =00000000000000a9 R9 =0000000000000640 R10=a3d70a3d70a3d70b R11=2ce33e6c02ce33e7 R12=8f5c28f5c28f5c29 R13=0000000000000013 R14=00000000000001ec R15=000000000000076c RIP=00007fad83bb0d36 RFL=00000206 [-----P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fad83766700 00000000 00000000 GS =0000 0000000000000000 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=00007f6796cd2bc0 CR3=000000000e932000 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=ffffffffffffffffffffffffff000000 XMM01=00000000000000003043545500435455 XMM02=2079746972756365732078756e694c45 XMM03=2064656c696146203a656d616e796278 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343936 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=0000000000000001 RDX=1ffff110011caf28 RSI=ffffffff8100455c RDI=ffff888008e57900 RBP=ffff888008e57958 RSP=ffff888008e57890 R8 =0000000000000001 R9 =ffff888008e57940 R10=0000000000038001 R11=0000000000009bea R12=ffff888008e57960 R13=ffff888008e57948 R14=ffff888008e57941 R15=ffff888008e57900 RIP=ffffffff811306da RFL=00000216 [----AP-] 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=00007ffd58087000 CR3=000000000caf6000 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=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