syzkaller login: [ 78.625186] BUG: Bad rss-counter state mm:000000004f3eac34 type:MM_FILEPAGES val:33 [ 78.626453] BUG: Bad rss-counter state mm:000000004f3eac34 type:MM_ANONPAGES val:22 [ 78.795313] ================================================================== [ 78.796324] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 78.797272] Read of size 8 at addr ffff88800d606d08 by task sshd/222 [ 78.798162] [ 78.798387] CPU: 0 PID: 222 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 78.799428] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 78.800456] Call Trace: [ 78.800789] [ 78.801074] dump_stack_lvl+0x91/0xf0 [ 78.801578] print_report+0xcc/0x620 [ 78.802085] ? __virt_addr_valid+0x102/0x340 [ 78.802640] ? vma_interval_tree_remove+0xc75/0xec0 [ 78.803264] ? vma_interval_tree_remove+0xc75/0xec0 [ 78.803895] kasan_report+0xbe/0xf0 [ 78.804374] ? vma_interval_tree_remove+0xc75/0xec0 [ 78.804998] vma_interval_tree_remove+0xc75/0xec0 [ 78.805610] vma_prepare+0xc54/0x11a0 [ 78.806088] __split_vma+0x5af/0x950 [ 78.806561] ? __pfx___split_vma+0x10/0x10 [ 78.807101] ? find_held_lock+0x2c/0x110 [ 78.807657] do_vmi_align_munmap+0x2ba/0x11f0 [ 78.808222] ? lock_is_held_type+0x9f/0x120 [ 78.808759] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 78.809377] ? mtree_range_walk+0x632/0x900 [ 78.809932] ? mas_walk+0x5c7/0x7c0 [ 78.810415] do_vmi_munmap+0x1f1/0x2b0 [ 78.810904] mmap_region+0x1f9/0x2660 [ 78.811389] ? vm_mmap_pgoff+0x15c/0x3a0 [ 78.811914] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 78.812639] ? __pfx_lock_acquire+0x10/0x10 [ 78.813172] ? __pfx_mmap_region+0x10/0x10 [ 78.813705] ? security_mmap_addr+0x7d/0xa0 [ 78.814228] ? get_unmapped_area+0x1f5/0x3f0 [ 78.814779] do_mmap+0x854/0xf00 [ 78.815225] vm_mmap_pgoff+0x1a6/0x3a0 [ 78.815750] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 78.816309] ksys_mmap_pgoff+0x3af/0x500 [ 78.816824] do_syscall_64+0x3f/0x90 [ 78.817301] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 78.817953] RIP: 0033:0x7f8421e7ed82 [ 78.818414] 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 [ 78.820551] RSP: 002b:00007ffebb9909d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 78.821462] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8421e7ed82 [ 78.822316] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f84212b8000 [ 78.823155] RBP: 00007f84212b8000 R08: 0000000000000009 R09: 0000000000001000 [ 78.824006] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b00c2c6980 [ 78.824868] R13: 00007ffebb9909f0 R14: 00007ffebb990a20 R15: 00007ffebb990d80 [ 78.825737] [ 78.826027] [ 78.826246] Allocated by task 215: [ 78.826684] kasan_save_stack+0x22/0x50 [ 78.827187] kasan_set_track+0x25/0x30 [ 78.827700] __kasan_slab_alloc+0x59/0x70 [ 78.828224] kmem_cache_alloc+0x16b/0x370 [ 78.828746] vm_area_dup+0x20/0x160 [ 78.829207] __split_vma+0x170/0x950 [ 78.829668] split_vma+0xc6/0x110 [ 78.830106] mprotect_fixup+0x8d2/0xb30 [ 78.830605] do_mprotect_pkey+0x87e/0xd40 [ 78.831127] __x64_sys_mprotect+0x78/0xc0 [ 78.831656] do_syscall_64+0x3f/0x90 [ 78.832130] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 78.832768] [ 78.832989] Freed by task 215: [ 78.833386] kasan_save_stack+0x22/0x50 [ 78.833880] kasan_set_track+0x25/0x30 [ 78.834373] kasan_save_free_info+0x2b/0x50 [ 78.834900] __kasan_slab_free+0x10a/0x190 [ 78.835431] kmem_cache_free+0x10d/0x4d0 [ 78.835950] rcu_core+0x8c8/0x2860 [ 78.836393] __do_softirq+0x1b7/0x7d4 [ 78.836864] [ 78.837078] Last potentially related work creation: [ 78.837662] kasan_save_stack+0x22/0x50 [ 78.838162] __kasan_record_aux_stack+0x8e/0xa0 [ 78.838733] __call_rcu_common.constprop.0+0x6a/0xb90 [ 78.839369] remove_vma+0x139/0x170 [ 78.839843] do_vmi_align_munmap+0xd4a/0x11f0 [ 78.840400] do_vmi_munmap+0x1f1/0x2b0 [ 78.840883] __vm_munmap+0x138/0x3a0 [ 78.841350] __x64_sys_munmap+0x59/0x80 [ 78.841846] do_syscall_64+0x3f/0x90 [ 78.842319] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 78.842953] [ 78.843167] Second to last potentially related work creation: [ 78.843854] kasan_save_stack+0x22/0x50 [ 78.844354] __kasan_record_aux_stack+0x8e/0xa0 [ 78.844923] __call_rcu_common.constprop.0+0x6a/0xb90 [ 78.845566] remove_vma+0x139/0x170 [ 78.846016] do_vmi_align_munmap+0xd4a/0x11f0 [ 78.846568] do_vmi_munmap+0x1f1/0x2b0 [ 78.847055] mmap_region+0x1f9/0x2660 [ 78.847547] do_mmap+0x854/0xf00 [ 78.847978] vm_mmap_pgoff+0x1a6/0x3a0 [ 78.848465] ksys_mmap_pgoff+0x3af/0x500 [ 78.848964] do_syscall_64+0x3f/0x90 [ 78.849432] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 78.850073] [ 78.850286] The buggy address belongs to the object at ffff88800d606cb0 [ 78.850286] which belongs to the cache vm_area_struct of size 168 [ 78.851755] The buggy address is located 88 bytes inside of [ 78.851755] freed 168-byte region [ffff88800d606cb0, ffff88800d606d58) [ 78.853180] [ 78.853393] The buggy address belongs to the physical page: [ 78.854057] page:0000000059f7b055 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd606 [ 78.855142] memcg:ffff888013fdb201 [ 78.855584] flags: 0x100000000000200(slab|node=0|zone=1) [ 78.856225] page_type: 0xffffffff() [ 78.856672] raw: 0100000000000200 ffff88800879fc80 ffffea0000319300 dead000000000004 [ 78.857591] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888013fdb201 [ 78.858503] page dumped because: kasan: bad access detected [ 78.859166] [ 78.859385] Memory state around the buggy address: [ 78.859972] ffff88800d606c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 78.860830] ffff88800d606c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 78.861693] >ffff88800d606d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 78.862554] ^ [ 78.862996] ffff88800d606d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 78.863867] ffff88800d606e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 78.864722] ================================================================== [ 78.865708] Disabling lock debugging due to kernel taint [ 80.745602] BUG: Bad rss-counter state mm:000000000bdc2127 type:MM_FILEPAGES val:33 [ 80.746600] BUG: Bad rss-counter state mm:000000000bdc2127 type:MM_ANONPAGES val:22 [ 81.300377] BUG: Bad rss-counter state mm:00000000678de358 type:MM_FILEPAGES val:33 [ 81.301528] BUG: Bad rss-counter state mm:00000000678de358 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:36551' (ECDSA) to the list of known hosts. 2023/06/20 05:47:33 fuzzer started 2023/06/20 05:47:33 dialing manager at localhost:44161 2023/06/20 05:47:33 checking machine... 2023/06/20 05:47:33 checking revisions... [ 81.953580] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:47:33 testing simple program... [ 82.043730] cgroup: Unknown subsys name 'net' [ 82.094565] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:46:53 Registers: info registers vcpu 0 RAX=000000000000011a RBX=ffff88800c493183 RCX=0000000000000000 RDX=ffff8880147f9b40 RSI=000000000000011a RDI=0000000000000000 RBP=ffff88800c493180 RSP=ffff888016c5fea0 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=1ffff11002d8bfd5 R13=000000000000011a R14=ffff88800c493270 R15=000000000000011a RIP=ffffffff814c03b0 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 00007f4110fd8700 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=00007f853f362038 CR3=0000000015ec4000 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=2032333a37343a3530203032206e754a XMM01=73732878696e755f6d6170203a5d3133 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3133325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032333a37343a3530203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff11003417a39 RBX=ffff88801a0bd198 RCX=ffffffff812e00e5 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88801a0bd1c8 RBP=ffff88801a24c228 RSP=ffff88806cf09dd8 R8 =0000000000000001 R9 =ffffed100d9e13af R10=0000000000000003 R11=00000000000b6996 R12=dffffc0000000000 R13=ffff88801a24c000 R14=ffffffff813782a8 R15=ffff88801a24c000 RIP=ffffffff81846362 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 00007fbb60dd0900 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=00007fbb60d9f008 CR3=000000000e9ce000 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