syzkaller login: [ 38.801904] BUG: Bad rss-counter state mm:000000007beb8448 type:MM_FILEPAGES val:33 [ 38.803154] BUG: Bad rss-counter state mm:000000007beb8448 type:MM_ANONPAGES val:22 [ 38.850885] ================================================================== [ 38.851916] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.852852] Read of size 8 at addr ffff88800e4e0310 by task sshd/220 [ 38.853652] [ 38.853874] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.854726] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.855725] Call Trace: [ 38.856046] [ 38.856326] dump_stack_lvl+0x91/0xf0 [ 38.856832] print_report+0xcc/0x620 [ 38.857337] ? __virt_addr_valid+0x102/0x340 [ 38.857897] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.858510] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.859144] kasan_report+0xbe/0xf0 [ 38.859665] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.860419] vma_interval_tree_remove+0xc75/0xec0 [ 38.861305] vma_prepare+0xc54/0x11a0 [ 38.861833] __split_vma+0x5af/0x950 [ 38.862298] ? __pfx___split_vma+0x10/0x10 [ 38.862832] ? find_held_lock+0x2c/0x110 [ 38.863353] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.863931] ? lock_is_held_type+0x9f/0x120 [ 38.864465] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.865087] ? mtree_range_walk+0x632/0x900 [ 38.865682] ? mas_walk+0x5c7/0x7c0 [ 38.866158] do_vmi_munmap+0x1f1/0x2b0 [ 38.866663] mmap_region+0x1f9/0x2660 [ 38.867141] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.867660] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.868363] ? __pfx_lock_acquire+0x10/0x10 [ 38.868908] ? __pfx_mmap_region+0x10/0x10 [ 38.869452] ? security_mmap_addr+0x7d/0xa0 [ 38.869993] ? get_unmapped_area+0x1f5/0x3f0 [ 38.870550] do_mmap+0x854/0xf00 [ 38.871011] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.871507] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.872076] ksys_mmap_pgoff+0x3af/0x500 [ 38.872590] do_syscall_64+0x3f/0x90 [ 38.873071] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.873759] RIP: 0033:0x7f9bdfec3d82 [ 38.874213] 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 [ 38.876502] RSP: 002b:00007ffd0f208f58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.877430] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9bdfec3d82 [ 38.878277] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9bdf2fd000 [ 38.879132] RBP: 00007f9bdf2fd000 R08: 0000000000000009 R09: 0000000000001000 [ 38.879982] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564cace90ec0 [ 38.880848] R13: 00007ffd0f208f70 R14: 00007ffd0f208fa0 R15: 00007ffd0f209300 [ 38.881721] [ 38.882011] [ 38.882225] Allocated by task 213: [ 38.882661] kasan_save_stack+0x22/0x50 [ 38.883157] kasan_set_track+0x25/0x30 [ 38.883661] __kasan_slab_alloc+0x59/0x70 [ 38.884181] kmem_cache_alloc+0x16b/0x370 [ 38.884705] vm_area_dup+0x20/0x160 [ 38.885177] __split_vma+0x170/0x950 [ 38.885662] split_vma+0xc6/0x110 [ 38.886095] mprotect_fixup+0x8d2/0xb30 [ 38.886601] do_mprotect_pkey+0x87e/0xd40 [ 38.887118] __x64_sys_mprotect+0x78/0xc0 [ 38.887649] do_syscall_64+0x3f/0x90 [ 38.888115] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.888767] [ 38.888980] Freed by task 213: [ 38.889377] kasan_save_stack+0x22/0x50 [ 38.889895] kasan_set_track+0x25/0x30 [ 38.890383] kasan_save_free_info+0x2b/0x50 [ 38.890934] __kasan_slab_free+0x10a/0x190 [ 38.891463] kmem_cache_free+0x10d/0x4d0 [ 38.891979] rcu_core+0x8c8/0x2860 [ 38.892416] __do_softirq+0x1b7/0x7d4 [ 38.892906] [ 38.893138] Last potentially related work creation: [ 38.893742] kasan_save_stack+0x22/0x50 [ 38.894247] __kasan_record_aux_stack+0x8e/0xa0 [ 38.894826] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.895465] remove_vma+0x139/0x170 [ 38.895934] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.896481] do_vmi_munmap+0x1f1/0x2b0 [ 38.896975] __vm_munmap+0x138/0x3a0 [ 38.897449] __x64_sys_munmap+0x59/0x80 [ 38.897958] do_syscall_64+0x3f/0x90 [ 38.898429] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.899074] [ 38.899287] The buggy address belongs to the object at ffff88800e4e02b8 [ 38.899287] which belongs to the cache vm_area_struct of size 168 [ 38.900777] The buggy address is located 88 bytes inside of [ 38.900777] freed 168-byte region [ffff88800e4e02b8, ffff88800e4e0360) [ 38.902200] [ 38.902412] The buggy address belongs to the physical page: [ 38.903076] page:000000009eede163 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe4e0 [ 38.904164] memcg:ffff88800ed12201 [ 38.904598] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.905295] page_type: 0xffffffff() [ 38.905774] raw: 0100000000000200 ffff8880087a0c80 ffffea00003ad880 dead000000000007 [ 38.906704] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ed12201 [ 38.907611] page dumped because: kasan: bad access detected [ 38.908263] [ 38.908475] Memory state around the buggy address: [ 38.909057] ffff88800e4e0200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 38.909933] ffff88800e4e0280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 38.910811] >ffff88800e4e0300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 38.911672] ^ [ 38.912136] ffff88800e4e0380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 38.913003] ffff88800e4e0400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 38.913875] ================================================================== [ 38.914960] Disabling lock debugging due to kernel taint [ 40.783882] BUG: Bad rss-counter state mm:0000000012ebfaa9 type:MM_FILEPAGES val:33 [ 40.785074] BUG: Bad rss-counter state mm:0000000012ebfaa9 type:MM_ANONPAGES val:22 [ 41.319981] BUG: Bad rss-counter state mm:00000000dc29e439 type:MM_FILEPAGES val:33 [ 41.321168] BUG: Bad rss-counter state mm:00000000dc29e439 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:6891' (ECDSA) to the list of known hosts. 2023/06/20 21:32:13 fuzzer started 2023/06/20 21:32:13 dialing manager at localhost:36067 2023/06/20 21:32:13 checking machine... 2023/06/20 21:32:13 checking revisions... [ 42.000535] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:32:14 testing simple program... [ 42.054996] cgroup: Unknown subsys name 'net' [ 42.103975] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:32:13 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff812d86ea RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=0000000000000000 RSP=ffff88800f0874f8 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000c7700000c77 R12=0000000000000000 R13=0000000000000019 R14=dffffc0000000000 R15=ffffffff87f97640 RIP=ffffffff812d8a62 RFL=00000282 [--S----] 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 00007fa21462d900 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=00007ffe20d01000 CR3=000000000e298000 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=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007f2e8df78000 CR3=000000001032c000 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=2033313a32333a3132203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033313a32333a3132203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000