syzkaller login: [ 35.597336] BUG: Bad rss-counter state mm:00000000dfbce207 type:MM_FILEPAGES val:33 [ 35.598377] BUG: Bad rss-counter state mm:00000000dfbce207 type:MM_ANONPAGES val:22 [ 35.790100] ================================================================== [ 35.791308] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.792544] Read of size 8 at addr ffff888019b05df0 by task sshd/220 [ 35.793585] [ 35.793875] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 35.795018] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.796308] Call Trace: [ 35.796759] [ 35.797258] dump_stack_lvl+0x91/0xf0 [ 35.797939] print_report+0xcc/0x620 [ 35.798580] ? __virt_addr_valid+0x102/0x340 [ 35.799312] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.800141] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.800970] kasan_report+0xbe/0xf0 [ 35.801617] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.802456] vma_interval_tree_remove+0xc75/0xec0 [ 35.803267] vma_prepare+0xc54/0x11a0 [ 35.803911] __split_vma+0x5af/0x950 [ 35.804544] ? __pfx___split_vma+0x10/0x10 [ 35.805256] ? find_held_lock+0x2c/0x110 [ 35.805845] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.806433] ? lock_is_held_type+0x9f/0x120 [ 35.806973] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.807583] ? mtree_range_walk+0x632/0x900 [ 35.808133] ? mas_walk+0x5c7/0x7c0 [ 35.808607] do_vmi_munmap+0x1f1/0x2b0 [ 35.809107] mmap_region+0x1f9/0x2660 [ 35.809617] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.810133] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.810848] ? __pfx_lock_acquire+0x10/0x10 [ 35.811384] ? __pfx_mmap_region+0x10/0x10 [ 35.811909] ? security_mmap_addr+0x7d/0xa0 [ 35.812447] ? get_unmapped_area+0x1f5/0x3f0 [ 35.812997] do_mmap+0x854/0xf00 [ 35.813445] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.813939] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.814496] ksys_mmap_pgoff+0x3af/0x500 [ 35.814998] do_syscall_64+0x3f/0x90 [ 35.815475] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.816120] RIP: 0033:0x7fda05686d82 [ 35.816579] 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 [ 35.818702] RSP: 002b:00007ffe565feee8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.819601] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fda05686d82 [ 35.820450] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fda04ac0000 [ 35.821293] RBP: 00007fda04ac0000 R08: 0000000000000009 R09: 0000000000001000 [ 35.822166] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561c71eb7ec0 [ 35.823011] R13: 00007ffe565fef00 R14: 00007ffe565fef30 R15: 00007ffe565ff290 [ 35.823869] [ 35.824158] [ 35.824373] Allocated by task 213: [ 35.824808] kasan_save_stack+0x22/0x50 [ 35.825316] kasan_set_track+0x25/0x30 [ 35.825806] __kasan_slab_alloc+0x59/0x70 [ 35.826332] kmem_cache_alloc+0x16b/0x370 [ 35.826842] vm_area_dup+0x20/0x160 [ 35.827293] __split_vma+0x170/0x950 [ 35.827756] split_vma+0xc6/0x110 [ 35.828190] mprotect_fixup+0x8d2/0xb30 [ 35.828698] do_mprotect_pkey+0x87e/0xd40 [ 35.829218] __x64_sys_mprotect+0x78/0xc0 [ 35.829743] do_syscall_64+0x3f/0x90 [ 35.830216] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.830857] [ 35.831072] Freed by task 213: [ 35.831466] kasan_save_stack+0x22/0x50 [ 35.831962] kasan_set_track+0x25/0x30 [ 35.832458] kasan_save_free_info+0x2b/0x50 [ 35.832989] __kasan_slab_free+0x10a/0x190 [ 35.833537] kmem_cache_free+0x10d/0x4d0 [ 35.834041] rcu_core+0x8c8/0x2860 [ 35.834481] __do_softirq+0x1b7/0x7d4 [ 35.834956] [ 35.835174] Last potentially related work creation: [ 35.835757] kasan_save_stack+0x22/0x50 [ 35.836258] __kasan_record_aux_stack+0x8e/0xa0 [ 35.836832] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.837485] remove_vma+0x139/0x170 [ 35.837939] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.838496] do_vmi_munmap+0x1f1/0x2b0 [ 35.838977] __vm_munmap+0x138/0x3a0 [ 35.839446] __x64_sys_munmap+0x59/0x80 [ 35.839941] do_syscall_64+0x3f/0x90 [ 35.840418] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.841066] [ 35.841284] The buggy address belongs to the object at ffff888019b05d98 [ 35.841284] which belongs to the cache vm_area_struct of size 168 [ 35.842757] The buggy address is located 88 bytes inside of [ 35.842757] freed 168-byte region [ffff888019b05d98, ffff888019b05e40) [ 35.844148] [ 35.844362] The buggy address belongs to the physical page: [ 35.845019] page:00000000cd200fbc refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19b05 [ 35.846117] memcg:ffff8880197f4201 [ 35.846542] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.847185] page_type: 0xffffffff() [ 35.847638] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 35.848558] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880197f4201 [ 35.849458] page dumped because: kasan: bad access detected [ 35.850125] [ 35.850342] Memory state around the buggy address: [ 35.850920] ffff888019b05c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 35.851768] ffff888019b05d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 35.852622] >ffff888019b05d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 35.853482] ^ [ 35.854291] ffff888019b05e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 35.855144] ffff888019b05e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.855992] ================================================================== [ 35.857289] Disabling lock debugging due to kernel taint [ 38.420161] BUG: Bad rss-counter state mm:0000000017745912 type:MM_FILEPAGES val:33 [ 38.420894] BUG: Bad rss-counter state mm:0000000017745912 type:MM_ANONPAGES val:22 [ 38.823206] BUG: Bad rss-counter state mm:00000000b61e46b1 type:MM_FILEPAGES val:33 [ 38.824324] BUG: Bad rss-counter state mm:00000000b61e46b1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:58299' (ECDSA) to the list of known hosts. 2023/06/21 08:37:31 fuzzer started 2023/06/21 08:37:31 dialing manager at localhost:36067 2023/06/21 08:37:31 checking machine... 2023/06/21 08:37:31 checking revisions... [ 39.412879] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:37:31 testing simple program... [ 39.449852] cgroup: Unknown subsys name 'net' [ 39.486302] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:37:31 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007feea0073ef0 CR3=000000000c690000 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=a8894d089ec97e93624bc3f31ca20c54 XMM02=ec2efd57dc4c00df000000000011dd98 XMM03=9b8e0c429f118e30000000000011de68 XMM04=9395aa5101c3915200000000000ae988 XMM05=19e9129bd510f23500000000001315f0 XMM06=4fda316b135da52b0000000000131478 XMM07=e042d86d42eb936e0000000000121ca8 XMM08=9b8e0c429f118e30000000000011de68 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000001 RCX=0000000000000001 RDX=1ffff11001fb7f41 RSI=ffffffff8460144a RDI=ffff88800fdbf9b0 RBP=ffff88800fdbfa08 RSP=ffff88800fdbf940 R8 =0000000000000001 R9 =ffff88800fdbf9f0 R10=0000000000038001 R11=00000000000b5305 R12=ffff88800fdbfa78 R13=0000000000000000 R14=ffff888016703680 R15=ffff88800fdbf9b0 RIP=ffffffff8113062c 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f4a21f34900 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=00007f4a21f13020 CR3=0000000009492000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000