syzkaller login: [ 45.840022] BUG: Bad rss-counter state mm:0000000075647bdd type:MM_FILEPAGES val:33 [ 45.841456] BUG: Bad rss-counter state mm:0000000075647bdd type:MM_ANONPAGES val:22 [ 45.876038] ================================================================== [ 45.876948] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 45.877873] Read of size 8 at addr ffff888017dc9a50 by task sshd/219 [ 45.878619] [ 45.878905] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 45.879751] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 45.880693] Call Trace: [ 45.881012] <TASK> [ 45.881296] dump_stack_lvl+0x91/0xf0 [ 45.881777] print_report+0xcc/0x620 [ 45.882245] ? __virt_addr_valid+0x102/0x340 [ 45.882780] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.883380] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.883980] kasan_report+0xbe/0xf0 [ 45.884446] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.885052] vma_interval_tree_remove+0xc75/0xec0 [ 45.885634] vma_prepare+0xc54/0x11a0 [ 45.886121] __split_vma+0x5af/0x950 [ 45.886593] ? __pfx___split_vma+0x10/0x10 [ 45.887094] ? find_held_lock+0x2c/0x110 [ 45.887610] do_vmi_align_munmap+0x2ba/0x11f0 [ 45.888155] ? lock_is_held_type+0x9f/0x120 [ 45.888692] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 45.889293] ? mtree_range_walk+0x632/0x900 [ 45.889836] ? mas_walk+0x5c7/0x7c0 [ 45.890301] do_vmi_munmap+0x1f1/0x2b0 [ 45.890786] mmap_region+0x1f9/0x2660 [ 45.891253] ? vm_mmap_pgoff+0x15c/0x3a0 [ 45.891753] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 45.892462] ? __pfx_lock_acquire+0x10/0x10 [ 45.892980] ? __pfx_mmap_region+0x10/0x10 [ 45.893483] ? security_mmap_addr+0x7d/0xa0 [ 45.893998] ? get_unmapped_area+0x1f5/0x3f0 [ 45.894515] do_mmap+0x854/0xf00 [ 45.894934] vm_mmap_pgoff+0x1a6/0x3a0 [ 45.895411] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 45.895944] ksys_mmap_pgoff+0x3af/0x500 [ 45.896424] do_syscall_64+0x3f/0x90 [ 45.896879] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.897495] RIP: 0033:0x7f076db20d82 [ 45.897937] 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 [ 45.899936] RSP: 002b:00007fffc7845c08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 45.900782] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f076db20d82 [ 45.901572] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f076cf5a000 [ 45.902399] RBP: 00007f076cf5a000 R08: 0000000000000009 R09: 0000000000001000 [ 45.903248] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cf3db2ef60 [ 45.904096] R13: 00007fffc7845c20 R14: 00007fffc7845c50 R15: 00007fffc7845fb0 [ 45.904963] </TASK> [ 45.905258] [ 45.905475] Allocated by task 212: [ 45.905920] kasan_save_stack+0x22/0x50 [ 45.906425] kasan_set_track+0x25/0x30 [ 45.906915] __kasan_slab_alloc+0x59/0x70 [ 45.907435] kmem_cache_alloc+0x16b/0x370 [ 45.907944] vm_area_dup+0x20/0x160 [ 45.908399] __split_vma+0x170/0x950 [ 45.908855] split_vma+0xc6/0x110 [ 45.909285] mprotect_fixup+0x8d2/0xb30 [ 45.909791] do_mprotect_pkey+0x87e/0xd40 [ 45.910302] __x64_sys_mprotect+0x78/0xc0 [ 45.910821] do_syscall_64+0x3f/0x90 [ 45.911297] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.911921] [ 45.912132] Freed by task 212: [ 45.912521] kasan_save_stack+0x22/0x50 [ 45.913022] kasan_set_track+0x25/0x30 [ 45.913508] kasan_save_free_info+0x2b/0x50 [ 45.914059] __kasan_slab_free+0x10a/0x190 [ 45.914596] kmem_cache_free+0x10d/0x4d0 [ 45.915102] rcu_core+0x8c8/0x2860 [ 45.915545] __do_softirq+0x1b7/0x7d4 [ 45.916017] [ 45.916233] Last potentially related work creation: [ 45.916817] kasan_save_stack+0x22/0x50 [ 45.917322] __kasan_record_aux_stack+0x8e/0xa0 [ 45.917902] __call_rcu_common.constprop.0+0x6a/0xb90 [ 45.918551] remove_vma+0x139/0x170 [ 45.919001] do_vmi_align_munmap+0xd4a/0x11f0 [ 45.919548] do_vmi_munmap+0x1f1/0x2b0 [ 45.920032] __vm_munmap+0x138/0x3a0 [ 45.920502] __x64_sys_munmap+0x59/0x80 [ 45.921001] do_syscall_64+0x3f/0x90 [ 45.921475] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.922116] [ 45.922333] The buggy address belongs to the object at ffff888017dc99f8 [ 45.922333] which belongs to the cache vm_area_struct of size 168 [ 45.923792] The buggy address is located 88 bytes inside of [ 45.923792] freed 168-byte region [ffff888017dc99f8, ffff888017dc9aa0) [ 45.925203] [ 45.925419] The buggy address belongs to the physical page: [ 45.926089] page:0000000026deaa4f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x17dc9 [ 45.927155] memcg:ffff88800e3bf501 [ 45.927578] flags: 0x100000000000200(slab|node=0|zone=1) [ 45.928220] page_type: 0xffffffff() [ 45.928670] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 45.929564] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e3bf501 [ 45.930483] page dumped because: kasan: bad access detected [ 45.931155] [ 45.931369] Memory state around the buggy address: [ 45.931960] ffff888017dc9900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 45.932814] ffff888017dc9980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 45.933670] >ffff888017dc9a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 45.934530] ^ [ 45.935220] ffff888017dc9a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 45.936070] ffff888017dc9b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 45.936921] ================================================================== [ 45.937977] Disabling lock debugging due to kernel taint [ 47.893270] BUG: Bad rss-counter state mm:00000000b3d0f736 type:MM_FILEPAGES val:33 [ 47.893973] BUG: Bad rss-counter state mm:00000000b3d0f736 type:MM_ANONPAGES val:22 [ 48.346790] BUG: Bad rss-counter state mm:0000000034f03f89 type:MM_FILEPAGES val:33 [ 48.347788] BUG: Bad rss-counter state mm:0000000034f03f89 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:40546' (ECDSA) to the list of known hosts. 2023/06/19 17:33:57 fuzzer started 2023/06/19 17:33:57 dialing manager at localhost:44161 2023/06/19 17:33:57 checking machine... 2023/06/19 17:33:57 checking revisions... [ 49.047195] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:33:57 testing simple program... [ 49.093729] cgroup: Unknown subsys name 'net' [ 49.134845] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:33:43 Registers: info registers vcpu 0 RAX=0000000000000007 RBX=ffffffff86053a2c RCX=ffffffff846000a9 RDX=0000000000000000 RSI=ffffffff864b9d50 RDI=ffffffff86053a2c RBP=ffffffff86053a2c RSP=ffff88801a2c78e8 R8 =ffffffff864b9d50 R9 =ffff88801a2c79e0 R10=0000000000038001 R11=00000000000b6996 R12=ffffffff86053a30 R13=ffffffff86053a2c R14=ffffffff86053a2c R15=dffffc0000000000 RIP=ffffffff8112fc8c RFL=00000202 [-------] 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 00007f4b84b49900 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=00007ffc3e165000 CR3=000000000e7d0000 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=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=00007f545ac3c180 CR3=000000000c6d0000 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=2da8f2c1af805abbb0400da997f55705 XMM02=000000000011e520eff9b2d0a8fce9cb XMM03=000000000011e5f02c67c8bc2e329bc3 XMM04=5bb24bcea27f5a6800000000000ae988 XMM05=97f759aa1d88a2140000000000135910 XMM06=4fda316b135da52b00000000001349b0 XMM07=e042d86d42eb936e0000000000125240 XMM08=2dfcd1f375cc6486000000000011e5f0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000