syzkaller login: [ 31.269408] BUG: Bad rss-counter state mm:0000000025b26d1d type:MM_FILEPAGES val:33 [ 31.270618] BUG: Bad rss-counter state mm:0000000025b26d1d type:MM_ANONPAGES val:22 [ 31.313775] ================================================================== [ 31.314999] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.316106] Read of size 8 at addr ffff88800e1b9ed8 by task sshd/221 [ 31.317008] [ 31.317264] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.318314] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.319299] Call Trace: [ 31.319622] [ 31.319908] dump_stack_lvl+0x91/0xf0 [ 31.320400] print_report+0xcc/0x620 [ 31.320887] ? __virt_addr_valid+0x102/0x340 [ 31.321440] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.322068] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.322686] kasan_report+0xbe/0xf0 [ 31.323159] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.323801] vma_interval_tree_remove+0xc75/0xec0 [ 31.324413] vma_prepare+0xc54/0x11a0 [ 31.324905] __split_vma+0x5af/0x950 [ 31.325383] ? __pfx___split_vma+0x10/0x10 [ 31.325939] ? find_held_lock+0x2c/0x110 [ 31.326468] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.327041] ? lock_is_held_type+0x9f/0x120 [ 31.327597] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.328206] ? mtree_range_walk+0x632/0x900 [ 31.328768] ? mas_walk+0x5c7/0x7c0 [ 31.329246] do_vmi_munmap+0x1f1/0x2b0 [ 31.329744] mmap_region+0x1f9/0x2660 [ 31.330241] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.330761] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.331492] ? __pfx_lock_acquire+0x10/0x10 [ 31.332035] ? __pfx_mmap_region+0x10/0x10 [ 31.332578] ? security_mmap_addr+0x7d/0xa0 [ 31.333115] ? get_unmapped_area+0x1f5/0x3f0 [ 31.333666] do_mmap+0x854/0xf00 [ 31.334113] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.334619] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.335178] ksys_mmap_pgoff+0x3af/0x500 [ 31.335687] do_syscall_64+0x3f/0x90 [ 31.336174] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.336823] RIP: 0033:0x7f193e969d82 [ 31.337281] 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 [ 31.339438] RSP: 002b:00007ffc1bbf81f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.340362] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f193e969d82 [ 31.341226] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f193dda3000 [ 31.342079] RBP: 00007f193dda3000 R08: 0000000000000009 R09: 0000000000001000 [ 31.342937] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f1d1dcdec0 [ 31.343803] R13: 00007ffc1bbf8210 R14: 00007ffc1bbf8240 R15: 00007ffc1bbf85a0 [ 31.344668] [ 31.344963] [ 31.345176] Allocated by task 214: [ 31.345616] kasan_save_stack+0x22/0x50 [ 31.346137] kasan_set_track+0x25/0x30 [ 31.346634] __kasan_slab_alloc+0x59/0x70 [ 31.347161] kmem_cache_alloc+0x16b/0x370 [ 31.347682] vm_area_dup+0x20/0x160 [ 31.348147] __split_vma+0x170/0x950 [ 31.348623] split_vma+0xc6/0x110 [ 31.349068] mprotect_fixup+0x8d2/0xb30 [ 31.349579] do_mprotect_pkey+0x87e/0xd40 [ 31.350120] __x64_sys_mprotect+0x78/0xc0 [ 31.350651] do_syscall_64+0x3f/0x90 [ 31.351128] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.351779] [ 31.351994] Freed by task 214: [ 31.352384] kasan_save_stack+0x22/0x50 [ 31.352894] kasan_set_track+0x25/0x30 [ 31.353400] kasan_save_free_info+0x2b/0x50 [ 31.353944] __kasan_slab_free+0x10a/0x190 [ 31.354477] kmem_cache_free+0x10d/0x4d0 [ 31.355058] rcu_core+0x8c8/0x2860 [ 31.355522] __do_softirq+0x1b7/0x7d4 [ 31.356009] [ 31.356226] Last potentially related work creation: [ 31.356820] kasan_save_stack+0x22/0x50 [ 31.357337] __kasan_record_aux_stack+0x8e/0xa0 [ 31.357939] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.358602] remove_vma+0x139/0x170 [ 31.359057] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.359626] do_vmi_munmap+0x1f1/0x2b0 [ 31.360117] __vm_munmap+0x138/0x3a0 [ 31.360586] __x64_sys_munmap+0x59/0x80 [ 31.361088] do_syscall_64+0x3f/0x90 [ 31.361572] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.362223] [ 31.362445] The buggy address belongs to the object at ffff88800e1b9e80 [ 31.362445] which belongs to the cache vm_area_struct of size 168 [ 31.363938] The buggy address is located 88 bytes inside of [ 31.363938] freed 168-byte region [ffff88800e1b9e80, ffff88800e1b9f28) [ 31.365358] [ 31.365576] The buggy address belongs to the physical page: [ 31.366252] page:000000007035b537 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe1b9 [ 31.367337] memcg:ffff88800947cd01 [ 31.367763] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.368416] page_type: 0xffffffff() [ 31.368873] raw: 0100000000000200 ffff8880087a0c80 ffffea0000356840 dead000000000002 [ 31.369805] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800947cd01 [ 31.370721] page dumped because: kasan: bad access detected [ 31.371376] [ 31.371593] Memory state around the buggy address: [ 31.372170] ffff88800e1b9d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.373034] ffff88800e1b9e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.373906] >ffff88800e1b9e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.374778] ^ [ 31.375508] ffff88800e1b9f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 31.376370] ffff88800e1b9f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.377229] ================================================================== [ 31.378174] Disabling lock debugging due to kernel taint [ 34.018874] BUG: Bad rss-counter state mm:00000000c98d47b5 type:MM_FILEPAGES val:33 [ 34.020020] BUG: Bad rss-counter state mm:00000000c98d47b5 type:MM_ANONPAGES val:22 [ 34.439523] BUG: Bad rss-counter state mm:00000000d63b79bb type:MM_FILEPAGES val:33 [ 34.440427] BUG: Bad rss-counter state mm:00000000d63b79bb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:13096' (ECDSA) to the list of known hosts. 2023/06/21 07:45:38 fuzzer started 2023/06/21 07:45:38 dialing manager at localhost:36067 2023/06/21 07:45:38 checking machine... 2023/06/21 07:45:38 checking revisions... [ 35.072466] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:45:38 testing simple program... [ 35.116259] cgroup: Unknown subsys name 'net' [ 35.148619] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:45:38 Registers: info registers vcpu 0 RAX=ffff88800d690001 RBX=ffff88800d68f370 RCX=0000000000000001 RDX=ffff88800d68f801 RSI=ffff88800d68f828 RDI=ffff88800d68f380 RBP=ffff88800d68f828 RSP=ffff88800d68f2c8 R8 =ffffffff863b7f62 R9 =ffff88800d68f3b0 R10=0000000000038001 R11=000000000008b5b9 R12=0000000000000008 R13=ffff88800d688000 R14=ffff88800d68f830 R15=ffff88800d68f370 RIP=ffffffff8113048d RFL=00000283 [--S---C] 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 00007f118272e900 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=00007f1182ce5618 CR3=000000001c540000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a 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=00007fb8d02b0038 CR3=0000000008ec0000 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=838543eb1b8d1e878b44ddad3d0d6f71 XMM02=2c67c8bc2e329bc3000000000011a430 XMM03=fb795ef6d65770560000000000121a40 XMM04=432293da548c05a100000000000ae988 XMM05=9b6488e6c14c092c00000000001329d8 XMM06=c291bd5c70af25b90000000000131a78 XMM07=e042d86d42eb936e0000000000121cc0 XMM08=3f3ba1bb4113bbf7000000000011a490 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000