syzkaller login: [ 31.208459] BUG: Bad rss-counter state mm:00000000e4679505 type:MM_FILEPAGES val:33 [ 31.210509] BUG: Bad rss-counter state mm:00000000e4679505 type:MM_ANONPAGES val:22 [ 31.377563] ================================================================== [ 31.378525] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.379465] Read of size 8 at addr ffff88800dba8c20 by task sshd/219 [ 31.380404] [ 31.380628] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.381500] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.382496] Call Trace: [ 31.382814] [ 31.383099] dump_stack_lvl+0x91/0xf0 [ 31.383590] print_report+0xcc/0x620 [ 31.384069] ? __virt_addr_valid+0x102/0x340 [ 31.384617] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.385247] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.385864] kasan_report+0xbe/0xf0 [ 31.386340] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.386968] vma_interval_tree_remove+0xc75/0xec0 [ 31.387576] vma_prepare+0xc54/0x11a0 [ 31.388054] __split_vma+0x5af/0x950 [ 31.388527] ? __pfx___split_vma+0x10/0x10 [ 31.389077] ? find_held_lock+0x2c/0x110 [ 31.389608] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.390180] ? lock_is_held_type+0x9f/0x120 [ 31.390720] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.391327] ? mtree_range_walk+0x632/0x900 [ 31.391885] ? mas_walk+0x5c7/0x7c0 [ 31.392359] do_vmi_munmap+0x1f1/0x2b0 [ 31.392854] mmap_region+0x1f9/0x2660 [ 31.393336] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.393850] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.394574] ? __pfx_lock_acquire+0x10/0x10 [ 31.395106] ? __pfx_mmap_region+0x10/0x10 [ 31.395636] ? security_mmap_addr+0x7d/0xa0 [ 31.396164] ? get_unmapped_area+0x1f5/0x3f0 [ 31.396713] do_mmap+0x854/0xf00 [ 31.397184] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.397681] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.398246] ksys_mmap_pgoff+0x3af/0x500 [ 31.398752] do_syscall_64+0x3f/0x90 [ 31.399227] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.399876] RIP: 0033:0x7f988836bd82 [ 31.400330] 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 [ 31.402484] RSP: 002b:00007ffdedf6a108 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.403392] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f988836bd82 [ 31.404241] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f98877a5000 [ 31.405108] RBP: 00007f98877a5000 R08: 0000000000000009 R09: 0000000000001000 [ 31.405956] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fa92cfef60 [ 31.406805] R13: 00007ffdedf6a120 R14: 00007ffdedf6a150 R15: 00007ffdedf6a4b0 [ 31.407661] [ 31.407959] [ 31.408173] Allocated by task 212: [ 31.408603] kasan_save_stack+0x22/0x50 [ 31.409125] kasan_set_track+0x25/0x30 [ 31.409631] __kasan_slab_alloc+0x59/0x70 [ 31.410171] kmem_cache_alloc+0x16b/0x370 [ 31.410691] vm_area_dup+0x20/0x160 [ 31.411141] __split_vma+0x170/0x950 [ 31.411610] split_vma+0xc6/0x110 [ 31.412048] mprotect_fixup+0x8d2/0xb30 [ 31.412549] do_mprotect_pkey+0x87e/0xd40 [ 31.413084] __x64_sys_mprotect+0x78/0xc0 [ 31.413604] do_syscall_64+0x3f/0x90 [ 31.414071] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.414705] [ 31.414923] Freed by task 202: [ 31.415322] kasan_save_stack+0x22/0x50 [ 31.415827] kasan_set_track+0x25/0x30 [ 31.416325] kasan_save_free_info+0x2b/0x50 [ 31.416858] __kasan_slab_free+0x10a/0x190 [ 31.417396] kmem_cache_free+0x10d/0x4d0 [ 31.417900] rcu_core+0x8c8/0x2860 [ 31.418340] __do_softirq+0x1b7/0x7d4 [ 31.418820] [ 31.419035] Last potentially related work creation: [ 31.419620] kasan_save_stack+0x22/0x50 [ 31.420133] __kasan_record_aux_stack+0x8e/0xa0 [ 31.420710] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.421441] remove_vma+0x139/0x170 [ 31.421890] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.422443] do_vmi_munmap+0x1f1/0x2b0 [ 31.422933] __vm_munmap+0x138/0x3a0 [ 31.423397] __x64_sys_munmap+0x59/0x80 [ 31.423891] do_syscall_64+0x3f/0x90 [ 31.424376] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.425030] [ 31.425244] The buggy address belongs to the object at ffff88800dba8bc8 [ 31.425244] which belongs to the cache vm_area_struct of size 168 [ 31.426726] The buggy address is located 88 bytes inside of [ 31.426726] freed 168-byte region [ffff88800dba8bc8, ffff88800dba8c70) [ 31.428141] [ 31.428355] The buggy address belongs to the physical page: [ 31.429035] page:0000000033f76b2e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdba8 [ 31.430123] memcg:ffff88800de7a501 [ 31.430548] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.431205] page_type: 0xffffffff() [ 31.431661] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 31.432586] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800de7a501 [ 31.433513] page dumped because: kasan: bad access detected [ 31.434172] [ 31.434390] Memory state around the buggy address: [ 31.434988] ffff88800dba8b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.435843] ffff88800dba8b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 31.436707] >ffff88800dba8c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.437571] ^ [ 31.438105] ffff88800dba8c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 31.438958] ffff88800dba8d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 31.439808] ================================================================== [ 31.440728] Disabling lock debugging due to kernel taint [ 33.491421] BUG: Bad rss-counter state mm:0000000008148a4f type:MM_FILEPAGES val:33 [ 33.492644] BUG: Bad rss-counter state mm:0000000008148a4f type:MM_ANONPAGES val:22 [ 33.954396] BUG: Bad rss-counter state mm:000000004f407b47 type:MM_FILEPAGES val:33 [ 33.955351] BUG: Bad rss-counter state mm:000000004f407b47 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:51063' (ECDSA) to the list of known hosts. 2023/06/19 16:07:26 fuzzer started 2023/06/19 16:07:26 dialing manager at localhost:44161 2023/06/19 16:07:26 checking machine... 2023/06/19 16:07:26 checking revisions... [ 34.686645] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:07:26 testing simple program... [ 34.741094] cgroup: Unknown subsys name 'net' [ 34.798002] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:07:26 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88806ce2c5a0 RCX=0000000000000000 RDX=1ffff1100d9c58b5 RSI=ffffffff844d5060 RDI=ffff88806ce2c5a8 RBP=ffff88806ce2c250 RSP=ffff88806ce09df8 R8 =0000000000000006 R9 =ffff88806ce2c5a0 R10=ffff88806ce2c250 R11=ffff88806ce09ff8 R12=ffff88806ce2c5a0 R13=dffffc0000000000 R14=ffff88806ce2b9c0 R15=dffffc0000000000 RIP=ffffffff844cedca RFL=00000082 [--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 00007f19151fc900 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=00007f19157b40b0 CR3=000000000f246000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000246 RBX=0000000000000001 RCX=1ffffffff0ba7a02 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff8450d7fb RBP=dffffc0000000000 RSP=ffff888008e27e78 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=ffff888008d751c0 R15=0000000000000000 RIP=ffffffff81534324 RFL=00000002 [-------] 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=00007f6bf4a30ad0 CR3=000000000d792000 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=f7e850b701b8e299e94b780876518303 XMM02=2c67c8bc2e329bc3000000000011d4f8 XMM03=fb795ef6d657705600000000001242a0 XMM04=00280a49b2161f0d00000000000ae988 XMM05=68f67be815a055440000000000134bd8 XMM06=806171799158d9670000000000133c78 XMM07=e042d86d42eb936e0000000000124520 XMM08=e884c1791c763203000000000011d558 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000