syzkaller login: [ 30.488043] BUG: Bad rss-counter state mm:000000002cabddd8 type:MM_FILEPAGES val:33 [ 30.489355] BUG: Bad rss-counter state mm:000000002cabddd8 type:MM_ANONPAGES val:22 [ 30.603434] ================================================================== [ 30.604532] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.605667] Read of size 8 at addr ffff88800f2c5a50 by task sshd/221 [ 30.606760] [ 30.607049] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.607953] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.608981] Call Trace: [ 30.609325] [ 30.609613] dump_stack_lvl+0x91/0xf0 [ 30.610123] print_report+0xcc/0x620 [ 30.610627] ? __virt_addr_valid+0x102/0x340 [ 30.611235] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.611870] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.612515] kasan_report+0xbe/0xf0 [ 30.613006] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.613649] vma_interval_tree_remove+0xc75/0xec0 [ 30.614274] vma_prepare+0xc54/0x11a0 [ 30.614765] __split_vma+0x5af/0x950 [ 30.615299] ? __pfx___split_vma+0x10/0x10 [ 30.615842] ? find_held_lock+0x2c/0x110 [ 30.616409] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.617168] ? lock_is_held_type+0x9f/0x120 [ 30.617894] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.618708] ? mtree_range_walk+0x632/0x900 [ 30.619460] ? mas_walk+0x5c7/0x7c0 [ 30.620086] do_vmi_munmap+0x1f1/0x2b0 [ 30.620742] mmap_region+0x1f9/0x2660 [ 30.621382] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.622064] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.622963] ? __pfx_lock_acquire+0x10/0x10 [ 30.623528] ? __pfx_mmap_region+0x10/0x10 [ 30.624104] ? security_mmap_addr+0x7d/0xa0 [ 30.624656] ? get_unmapped_area+0x1f5/0x3f0 [ 30.625285] do_mmap+0x854/0xf00 [ 30.625769] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.626286] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.626883] ksys_mmap_pgoff+0x3af/0x500 [ 30.627412] do_syscall_64+0x3f/0x90 [ 30.627909] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.628593] RIP: 0033:0x7eff773b8d82 [ 30.629077] 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 [ 30.631268] RSP: 002b:00007ffec73ac138 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.632203] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007eff773b8d82 [ 30.633084] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007eff767f2000 [ 30.633956] RBP: 00007eff767f2000 R08: 0000000000000009 R09: 0000000000001000 [ 30.634849] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a440babf60 [ 30.635732] R13: 00007ffec73ac150 R14: 00007ffec73ac180 R15: 00007ffec73ac4e0 [ 30.636612] [ 30.636916] [ 30.637176] Allocated by task 214: [ 30.637614] kasan_save_stack+0x22/0x50 [ 30.638135] kasan_set_track+0x25/0x30 [ 30.638631] __kasan_slab_alloc+0x59/0x70 [ 30.639193] kmem_cache_alloc+0x16b/0x370 [ 30.639709] vm_area_dup+0x20/0x160 [ 30.640196] __split_vma+0x170/0x950 [ 30.640669] split_vma+0xc6/0x110 [ 30.641146] mprotect_fixup+0x8d2/0xb30 [ 30.641656] do_mprotect_pkey+0x87e/0xd40 [ 30.642192] __x64_sys_mprotect+0x78/0xc0 [ 30.642715] do_syscall_64+0x3f/0x90 [ 30.643237] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.643891] [ 30.644129] Freed by task 214: [ 30.644525] kasan_save_stack+0x22/0x50 [ 30.645050] kasan_set_track+0x25/0x30 [ 30.645576] kasan_save_free_info+0x2b/0x50 [ 30.646131] __kasan_slab_free+0x10a/0x190 [ 30.646672] kmem_cache_free+0x10d/0x4d0 [ 30.647227] rcu_core+0x8c8/0x2860 [ 30.647675] __do_softirq+0x1b7/0x7d4 [ 30.648177] [ 30.648398] Last potentially related work creation: [ 30.648983] kasan_save_stack+0x22/0x50 [ 30.649516] __kasan_record_aux_stack+0x8e/0xa0 [ 30.650130] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.650794] remove_vma+0x139/0x170 [ 30.651269] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.651843] do_vmi_munmap+0x1f1/0x2b0 [ 30.652352] __vm_munmap+0x138/0x3a0 [ 30.652829] __x64_sys_munmap+0x59/0x80 [ 30.653341] do_syscall_64+0x3f/0x90 [ 30.653832] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.654507] [ 30.654725] The buggy address belongs to the object at ffff88800f2c59f8 [ 30.654725] which belongs to the cache vm_area_struct of size 168 [ 30.656242] The buggy address is located 88 bytes inside of [ 30.656242] freed 168-byte region [ffff88800f2c59f8, ffff88800f2c5aa0) [ 30.657692] [ 30.657909] The buggy address belongs to the physical page: [ 30.658607] page:00000000a5dc4eb3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf2c5 [ 30.659736] memcg:ffff88800ef61601 [ 30.660188] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.660848] page_type: 0xffffffff() [ 30.661314] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.662283] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ef61601 [ 30.663209] page dumped because: kasan: bad access detected [ 30.663885] [ 30.664122] Memory state around the buggy address: [ 30.664718] ffff88800f2c5900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.665597] ffff88800f2c5980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 30.666487] >ffff88800f2c5a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.667396] ^ [ 30.668118] ffff88800f2c5a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 30.669003] ffff88800f2c5b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.669869] ================================================================== [ 30.671077] Disabling lock debugging due to kernel taint [ 32.793941] BUG: Bad rss-counter state mm:00000000b7da570f type:MM_FILEPAGES val:33 [ 32.795121] BUG: Bad rss-counter state mm:00000000b7da570f type:MM_ANONPAGES val:22 [ 33.276354] BUG: Bad rss-counter state mm:00000000008b3fb7 type:MM_FILEPAGES val:33 [ 33.277554] BUG: Bad rss-counter state mm:00000000008b3fb7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:3202' (ECDSA) to the list of known hosts. 2023/06/20 19:37:23 fuzzer started 2023/06/20 19:37:24 dialing manager at localhost:36067 2023/06/20 19:37:24 checking machine... 2023/06/20 19:37:24 checking revisions... [ 33.922335] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:37:24 testing simple program... [ 33.967032] cgroup: Unknown subsys name 'net' [ 34.004846] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:37:23 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=000000005b3fecd4 RCX=ffffffff849f3580 RDX=ffff888016be1b40 RSI=1ffffffff093e6b0 RDI=0000000000000000 RBP=00000000dc4dc65c RSP=ffff8880165ff658 R8 =0000000000000000 R9 =00000000370121fa R10=00000000b21bb12c R11=0000000000000000 R12=dffffc0000000000 R13=ffffffff849f2d80 R14=0000000000000007 R15=ffff8880172ebcc0 RIP=ffffffff8219d4d6 RFL=00000212 [----A--] 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 00007fea47fff700 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=00007ffc556bbad8 CR3=00000000145be000 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=2033323a37333a3931203032206e754a XMM01=657463656e6e6f63736944203a5d3133 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3133325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033323a37333a3931203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000019 RCX=0000000000000000 RDX=ffff8880159c51c0 RSI=0000000000000019 RDI=0000000000000000 RBP=ffffffff854f6380 RSP=ffff88801586f870 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000019 R11=0000000000000001 R12=ffff88800ebe3b40 R13=0000000000000000 R14=ffff88801586fb80 R15=ffff8880159c51c0 RIP=ffffffff814c0404 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 00007f2ba6ee9900 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=00007f2ba635b540 CR3=000000000d8d2000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=8cdbd0bdbf6bead000000000000ae988 XMM05=6596b3c5a863e6270000000000133240 XMM06=00c3ffa147b8d8570000000000132030 XMM07=fb795ef6d65770560000000000121ff8 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000