syzkaller login: [ 31.284584] BUG: Bad rss-counter state mm:00000000ec4c3451 type:MM_FILEPAGES val:33 [ 31.285647] BUG: Bad rss-counter state mm:00000000ec4c3451 type:MM_ANONPAGES val:22 [ 31.354911] ================================================================== [ 31.356033] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.357013] Read of size 8 at addr ffff88800eab4968 by task sshd/221 [ 31.357879] [ 31.358098] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.358965] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.360024] Call Trace: [ 31.360347] [ 31.360638] dump_stack_lvl+0x91/0xf0 [ 31.361134] print_report+0xcc/0x620 [ 31.361616] ? __virt_addr_valid+0x102/0x340 [ 31.362161] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.362784] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.363414] kasan_report+0xbe/0xf0 [ 31.363923] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.364549] vma_interval_tree_remove+0xc75/0xec0 [ 31.365155] vma_prepare+0xc54/0x11a0 [ 31.365638] __split_vma+0x5af/0x950 [ 31.366113] ? __pfx___split_vma+0x10/0x10 [ 31.366645] ? find_held_lock+0x2c/0x110 [ 31.367171] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.367783] ? lock_is_held_type+0x9f/0x120 [ 31.368328] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.368941] ? mtree_range_walk+0x632/0x900 [ 31.369495] ? mas_walk+0x5c7/0x7c0 [ 31.369973] do_vmi_munmap+0x1f1/0x2b0 [ 31.370468] mmap_region+0x1f9/0x2660 [ 31.370951] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.371464] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.372212] ? __pfx_lock_acquire+0x10/0x10 [ 31.372751] ? __pfx_mmap_region+0x10/0x10 [ 31.373286] ? security_mmap_addr+0x7d/0xa0 [ 31.373820] ? get_unmapped_area+0x1f5/0x3f0 [ 31.374376] do_mmap+0x854/0xf00 [ 31.374817] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.375317] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.375919] ksys_mmap_pgoff+0x3af/0x500 [ 31.376434] do_syscall_64+0x3f/0x90 [ 31.376915] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.377564] RIP: 0033:0x7faeef256d82 [ 31.378025] 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 [ 31.380204] RSP: 002b:00007ffe29776258 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.381117] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007faeef256d82 [ 31.381971] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007faeee690000 [ 31.382822] RBP: 00007faeee690000 R08: 0000000000000009 R09: 0000000000001000 [ 31.383691] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556c6e427f70 [ 31.384573] R13: 00007ffe29776270 R14: 00007ffe297762a0 R15: 00007ffe29776600 [ 31.385441] [ 31.385734] [ 31.385953] Allocated by task 214: [ 31.386385] kasan_save_stack+0x22/0x50 [ 31.386898] kasan_set_track+0x25/0x30 [ 31.387400] __kasan_slab_alloc+0x59/0x70 [ 31.387974] kmem_cache_alloc+0x16b/0x370 [ 31.388496] vm_area_dup+0x20/0x160 [ 31.388952] __split_vma+0x170/0x950 [ 31.389427] split_vma+0xc6/0x110 [ 31.389870] mprotect_fixup+0x8d2/0xb30 [ 31.390371] do_mprotect_pkey+0x87e/0xd40 [ 31.390885] __x64_sys_mprotect+0x78/0xc0 [ 31.391413] do_syscall_64+0x3f/0x90 [ 31.391918] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.392569] [ 31.392787] Freed by task 214: [ 31.393186] kasan_save_stack+0x22/0x50 [ 31.393698] kasan_set_track+0x25/0x30 [ 31.394190] kasan_save_free_info+0x2b/0x50 [ 31.394727] __kasan_slab_free+0x10a/0x190 [ 31.395261] kmem_cache_free+0x10d/0x4d0 [ 31.395812] rcu_core+0x8c8/0x2860 [ 31.396257] __do_softirq+0x1b7/0x7d4 [ 31.396732] [ 31.396945] Last potentially related work creation: [ 31.397525] kasan_save_stack+0x22/0x50 [ 31.398029] __kasan_record_aux_stack+0x8e/0xa0 [ 31.398609] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.399254] remove_vma+0x139/0x170 [ 31.399719] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.400294] do_vmi_munmap+0x1f1/0x2b0 [ 31.400782] __vm_munmap+0x138/0x3a0 [ 31.401257] __x64_sys_munmap+0x59/0x80 [ 31.401754] do_syscall_64+0x3f/0x90 [ 31.402224] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.402861] [ 31.403074] The buggy address belongs to the object at ffff88800eab4910 [ 31.403074] which belongs to the cache vm_area_struct of size 168 [ 31.404567] The buggy address is located 88 bytes inside of [ 31.404567] freed 168-byte region [ffff88800eab4910, ffff88800eab49b8) [ 31.405987] [ 31.406202] The buggy address belongs to the physical page: [ 31.406867] page:000000000060bb78 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeab4 [ 31.407990] memcg:ffff888019b1e001 [ 31.408415] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.409061] page_type: 0xffffffff() [ 31.409508] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.410428] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019b1e001 [ 31.411336] page dumped because: kasan: bad access detected [ 31.412019] [ 31.412236] Memory state around the buggy address: [ 31.412817] ffff88800eab4800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 31.413672] ffff88800eab4880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 31.414534] >ffff88800eab4900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.415390] ^ [ 31.416225] ffff88800eab4980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 31.417086] ffff88800eab4a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.417938] ================================================================== [ 31.419081] Disabling lock debugging due to kernel taint [ 33.177850] BUG: Bad rss-counter state mm:00000000dd5f8a6b type:MM_FILEPAGES val:33 [ 33.178847] BUG: Bad rss-counter state mm:00000000dd5f8a6b type:MM_ANONPAGES val:22 [ 33.620235] BUG: Bad rss-counter state mm:00000000756ff535 type:MM_FILEPAGES val:33 [ 33.621222] BUG: Bad rss-counter state mm:00000000756ff535 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:47238' (ECDSA) to the list of known hosts. 2023/06/19 17:16:51 fuzzer started 2023/06/19 17:16:52 dialing manager at localhost:44161 2023/06/19 17:16:52 checking machine... 2023/06/19 17:16:52 checking revisions... [ 34.330997] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:16:52 testing simple program... [ 34.368699] cgroup: Unknown subsys name 'net' [ 34.418343] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:16:51 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=0000000000000000 RCX=0000000080000000 RDX=ffff88800fa751c0 RSI=ffffffff811431a3 RDI=0000000000000007 RBP=000000000edd5080 RSP=ffff88800d657cc8 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=0000000000000000 R13=0000000000080000 R14=ffffffff81ef13be R15=ffff88800f07c180 RIP=ffffffff814c07f1 RFL=00000293 [--S-A-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 00007fefac742900 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=00007f1883838650 CR3=00000000145e0000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=86186f5dbf05007b00000000000ae988 XMM05=615fb18f424488310000000000135a40 XMM06=c291bd5c70af25b90000000000134830 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88806cf09e48 RCX=0000000000000002 RDX=1ffff1100d9e1350 RSI=ffff88806cf09e38 RDI=ffff88806cf09a80 RBP=ffff8880090b0c80 RSP=ffff88806cf09a08 R8 =0000000000000001 R9 =ffff88806cf09ab8 R10=0000000000038001 R11=0000000000020cb4 R12=ffff88806cf09ad8 R13=ffff88806cf09ac0 R14=ffff88806cf09e38 R15=ffff88806cf09a78 RIP=ffffffff81131c83 RFL=00000246 [---Z-P-] 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=00007ffd416807a8 CR3=0000000016948000 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=2031353a36313a3731203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031353a36313a3731203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000