syzkaller login: [ 30.666593] BUG: Bad rss-counter state mm:000000004a4cb103 type:MM_FILEPAGES val:33 [ 30.667809] BUG: Bad rss-counter state mm:000000004a4cb103 type:MM_ANONPAGES val:22 [ 30.826923] ================================================================== [ 30.827833] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.828786] Read of size 8 at addr ffff888015d78058 by task sshd/219 [ 30.829551] [ 30.829770] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.830806] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.831777] Call Trace: [ 30.832099] [ 30.832387] dump_stack_lvl+0x91/0xf0 [ 30.832905] print_report+0xcc/0x620 [ 30.833386] ? __virt_addr_valid+0x102/0x340 [ 30.833944] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.834551] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.835169] kasan_report+0xbe/0xf0 [ 30.835647] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.836260] vma_interval_tree_remove+0xc75/0xec0 [ 30.836878] vma_prepare+0xc54/0x11a0 [ 30.837361] __split_vma+0x5af/0x950 [ 30.837830] ? __pfx___split_vma+0x10/0x10 [ 30.838383] ? find_held_lock+0x2c/0x110 [ 30.838898] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.839462] ? lock_is_held_type+0x9f/0x120 [ 30.840008] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.840617] ? mtree_range_walk+0x632/0x900 [ 30.841181] ? mas_walk+0x5c7/0x7c0 [ 30.841652] do_vmi_munmap+0x1f1/0x2b0 [ 30.842182] mmap_region+0x1f9/0x2660 [ 30.842673] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.843194] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.843918] ? __pfx_lock_acquire+0x10/0x10 [ 30.844459] ? __pfx_mmap_region+0x10/0x10 [ 30.844986] ? security_mmap_addr+0x7d/0xa0 [ 30.845518] ? get_unmapped_area+0x1f5/0x3f0 [ 30.846076] do_mmap+0x854/0xf00 [ 30.846516] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.847009] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.847566] ksys_mmap_pgoff+0x3af/0x500 [ 30.848086] do_syscall_64+0x3f/0x90 [ 30.848582] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.849247] RIP: 0033:0x7f329c509d82 [ 30.849703] 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 [ 30.851910] RSP: 002b:00007ffdeab661f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.852831] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f329c509d82 [ 30.853687] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f329b943000 [ 30.854566] RBP: 00007f329b943000 R08: 0000000000000009 R09: 0000000000001000 [ 30.855426] R10: 0000000000000812 R11: 0000000000000206 R12: 000055809d4e4f70 [ 30.856285] R13: 00007ffdeab66210 R14: 00007ffdeab66240 R15: 00007ffdeab665a0 [ 30.857152] [ 30.857447] [ 30.857664] Allocated by task 212: [ 30.858127] kasan_save_stack+0x22/0x50 [ 30.858640] kasan_set_track+0x25/0x30 [ 30.859142] __kasan_slab_alloc+0x59/0x70 [ 30.859664] kmem_cache_alloc+0x16b/0x370 [ 30.860198] vm_area_dup+0x20/0x160 [ 30.860658] __split_vma+0x170/0x950 [ 30.861144] split_vma+0xc6/0x110 [ 30.861598] mprotect_fixup+0x8d2/0xb30 [ 30.862113] do_mprotect_pkey+0x87e/0xd40 [ 30.862647] __x64_sys_mprotect+0x78/0xc0 [ 30.863180] do_syscall_64+0x3f/0x90 [ 30.863654] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.864319] [ 30.864537] Freed by task 212: [ 30.864931] kasan_save_stack+0x22/0x50 [ 30.865435] kasan_set_track+0x25/0x30 [ 30.865932] kasan_save_free_info+0x2b/0x50 [ 30.866468] __kasan_slab_free+0x10a/0x190 [ 30.867007] kmem_cache_free+0x10d/0x4d0 [ 30.867517] rcu_core+0x8c8/0x2860 [ 30.867973] __do_softirq+0x1b7/0x7d4 [ 30.868452] [ 30.868679] Last potentially related work creation: [ 30.869277] kasan_save_stack+0x22/0x50 [ 30.869788] __kasan_record_aux_stack+0x8e/0xa0 [ 30.870387] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.871031] remove_vma+0x139/0x170 [ 30.871490] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.872050] do_vmi_munmap+0x1f1/0x2b0 [ 30.872532] __vm_munmap+0x138/0x3a0 [ 30.873009] __x64_sys_munmap+0x59/0x80 [ 30.873498] do_syscall_64+0x3f/0x90 [ 30.873985] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.874635] [ 30.874853] The buggy address belongs to the object at ffff888015d78000 [ 30.874853] which belongs to the cache vm_area_struct of size 168 [ 30.876319] The buggy address is located 88 bytes inside of [ 30.876319] freed 168-byte region [ffff888015d78000, ffff888015d780a8) [ 30.877730] [ 30.877981] The buggy address belongs to the physical page: [ 30.878637] page:0000000028f812c0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15d78 [ 30.879729] memcg:ffff88801961e601 [ 30.880154] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.880799] page_type: 0xffffffff() [ 30.881250] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.882182] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801961e601 [ 30.883090] page dumped because: kasan: bad access detected [ 30.883755] [ 30.883972] Memory state around the buggy address: [ 30.884553] ffff888015d77f00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 30.885410] ffff888015d77f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.886286] >ffff888015d78000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.887171] ^ [ 30.887931] ffff888015d78080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 30.888821] ffff888015d78100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.889709] ================================================================== [ 30.891001] Disabling lock debugging due to kernel taint [ 33.074312] BUG: Bad rss-counter state mm:00000000995cacb8 type:MM_FILEPAGES val:33 [ 33.075822] BUG: Bad rss-counter state mm:00000000995cacb8 type:MM_ANONPAGES val:22 [ 33.547077] BUG: Bad rss-counter state mm:00000000c59690ad type:MM_FILEPAGES val:33 [ 33.548829] BUG: Bad rss-counter state mm:00000000c59690ad type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:44011' (ECDSA) to the list of known hosts. 2023/06/21 01:12:14 fuzzer started 2023/06/21 01:12:14 dialing manager at localhost:36067 2023/06/21 01:12:14 checking machine... 2023/06/21 01:12:14 checking revisions... [ 34.278985] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:12:14 testing simple program... [ 34.327037] cgroup: Unknown subsys name 'net' [ 34.363847] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:12:14 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000092cc0 RCX=ffffffff812d86ea RDX=0000000000000000 RSI=0000000000000132 RDI=ffffffff85265479 RBP=ffff888016957c48 RSP=ffff888016957bf0 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff88800844f780 R13=0000000000000000 R14=0000000000000cc0 R15=ffffffff8184725c RIP=ffffffff8122e9f0 RFL=00000202 [-------] 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 00007f0f0e7f8900 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=00007f0f0edaf618 CR3=000000000c5d0000 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=2033313a32313a3130203132206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033313a32313a3130203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff110027d0013 RBX=ffff888013e80068 RCX=ffffffff812e0135 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff888013e80098 RBP=ffff88800e1e4c80 RSP=ffff888008e37c98 R8 =0000000000000001 R9 =ffffed10011c6f87 R10=0000000000000003 R11=0000000000000128 R12=dffffc0000000000 R13=ffff88800e1e5900 R14=ffffffff8186b835 R15=ffff88800db58c00 RIP=ffffffff818464ec RFL=00000046 [---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=00007fb9d78799a0 CR3=00000000145ee000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=155bb94312f7484900000000000ae988 XMM05=aa2407aa828aae0800000000001322a0 XMM06=806171799158d9670000000000131090 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000