syzkaller login: [ 56.838890] BUG: Bad rss-counter state mm:00000000cdb29b88 type:MM_FILEPAGES val:33 [ 56.840406] BUG: Bad rss-counter state mm:00000000cdb29b88 type:MM_ANONPAGES val:22 [ 57.005711] ================================================================== [ 57.006852] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 57.008206] Read of size 8 at addr ffff8880183d5880 by task sshd/219 [ 57.009088] [ 57.009320] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 57.010210] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 57.011222] Call Trace: [ 57.011555] [ 57.011851] dump_stack_lvl+0x91/0xf0 [ 57.012385] print_report+0xcc/0x620 [ 57.012890] ? __virt_addr_valid+0x102/0x340 [ 57.013461] ? vma_interval_tree_remove+0xc75/0xec0 [ 57.014108] ? vma_interval_tree_remove+0xc75/0xec0 [ 57.014746] kasan_report+0xbe/0xf0 [ 57.015234] ? vma_interval_tree_remove+0xc75/0xec0 [ 57.015897] vma_interval_tree_remove+0xc75/0xec0 [ 57.016528] vma_prepare+0xc54/0x11a0 [ 57.017026] __split_vma+0x5af/0x950 [ 57.017519] ? __pfx___split_vma+0x10/0x10 [ 57.018077] ? find_held_lock+0x2c/0x110 [ 57.018625] do_vmi_align_munmap+0x2ba/0x11f0 [ 57.019215] ? lock_is_held_type+0x9f/0x120 [ 57.019778] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 57.020428] ? mtree_range_walk+0x632/0x900 [ 57.020998] ? mas_walk+0x5c7/0x7c0 [ 57.021489] do_vmi_munmap+0x1f1/0x2b0 [ 57.022003] mmap_region+0x1f9/0x2660 [ 57.022501] ? vm_mmap_pgoff+0x15c/0x3a0 [ 57.023031] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 57.023777] ? __pfx_lock_acquire+0x10/0x10 [ 57.024355] ? __pfx_mmap_region+0x10/0x10 [ 57.024907] ? security_mmap_addr+0x7d/0xa0 [ 57.025466] ? get_unmapped_area+0x1f5/0x3f0 [ 57.026037] do_mmap+0x854/0xf00 [ 57.026490] vm_mmap_pgoff+0x1a6/0x3a0 [ 57.027008] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 57.027592] ksys_mmap_pgoff+0x3af/0x500 [ 57.028139] do_syscall_64+0x3f/0x90 [ 57.028639] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 57.029314] RIP: 0033:0x7fd7ef318d82 [ 57.029791] 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 [ 57.032064] RSP: 002b:00007ffd68b02c48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 57.033014] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd7ef318d82 [ 57.033920] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd7ee752000 [ 57.034823] RBP: 00007fd7ee752000 R08: 0000000000000009 R09: 0000000000001000 [ 57.035717] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a397268ec0 [ 57.036619] R13: 00007ffd68b02c60 R14: 00007ffd68b02c90 R15: 00007ffd68b02ff0 [ 57.037542] [ 57.037852] [ 57.038076] Allocated by task 212: [ 57.038530] kasan_save_stack+0x22/0x50 [ 57.039064] kasan_set_track+0x25/0x30 [ 57.039580] __kasan_slab_alloc+0x59/0x70 [ 57.040150] kmem_cache_alloc+0x16b/0x370 [ 57.040704] vm_area_dup+0x20/0x160 [ 57.041179] __split_vma+0x170/0x950 [ 57.041671] split_vma+0xc6/0x110 [ 57.042132] mprotect_fixup+0x8d2/0xb30 [ 57.042657] do_mprotect_pkey+0x87e/0xd40 [ 57.043208] __x64_sys_mprotect+0x78/0xc0 [ 57.043757] do_syscall_64+0x3f/0x90 [ 57.044276] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 57.044954] [ 57.045181] Freed by task 202: [ 57.045598] kasan_save_stack+0x22/0x50 [ 57.046130] kasan_set_track+0x25/0x30 [ 57.046637] kasan_save_free_info+0x2b/0x50 [ 57.047190] __kasan_slab_free+0x10a/0x190 [ 57.047762] kmem_cache_free+0x10d/0x4d0 [ 57.048295] rcu_core+0x8c8/0x2860 [ 57.048750] __do_softirq+0x1b7/0x7d4 [ 57.049231] [ 57.049458] Last potentially related work creation: [ 57.050051] kasan_save_stack+0x22/0x50 [ 57.050566] __kasan_record_aux_stack+0x8e/0xa0 [ 57.051155] __call_rcu_common.constprop.0+0x6a/0xb90 [ 57.051800] remove_vma+0x139/0x170 [ 57.052274] do_vmi_align_munmap+0xd4a/0x11f0 [ 57.052839] do_vmi_munmap+0x1f1/0x2b0 [ 57.053335] __vm_munmap+0x138/0x3a0 [ 57.053807] __x64_sys_munmap+0x59/0x80 [ 57.054311] do_syscall_64+0x3f/0x90 [ 57.054795] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 57.055450] [ 57.055667] The buggy address belongs to the object at ffff8880183d5828 [ 57.055667] which belongs to the cache vm_area_struct of size 168 [ 57.057167] The buggy address is located 88 bytes inside of [ 57.057167] freed 168-byte region [ffff8880183d5828, ffff8880183d58d0) [ 57.058622] [ 57.058852] The buggy address belongs to the physical page: [ 57.059538] page:00000000261e49ea refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x183d5 [ 57.060668] memcg:ffff888019eb2701 [ 57.061106] flags: 0x100000000000200(slab|node=0|zone=1) [ 57.061760] page_type: 0xffffffff() [ 57.062226] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 57.063157] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019eb2701 [ 57.064101] page dumped because: kasan: bad access detected [ 57.064776] [ 57.064993] Memory state around the buggy address: [ 57.065585] ffff8880183d5780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 57.066440] ffff8880183d5800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 57.067317] >ffff8880183d5880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 57.068207] ^ [ 57.068627] ffff8880183d5900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 57.069489] ffff8880183d5980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 57.070345] ================================================================== [ 57.071401] Disabling lock debugging due to kernel taint [ 59.024441] BUG: Bad rss-counter state mm:0000000001a4abb1 type:MM_FILEPAGES val:33 [ 59.025793] BUG: Bad rss-counter state mm:0000000001a4abb1 type:MM_ANONPAGES val:22 [ 59.474459] BUG: Bad rss-counter state mm:00000000603599fb type:MM_FILEPAGES val:33 [ 59.475654] BUG: Bad rss-counter state mm:00000000603599fb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:19943' (ECDSA) to the list of known hosts. 2023/06/19 16:02:42 fuzzer started 2023/06/19 16:02:42 dialing manager at localhost:44161 2023/06/19 16:02:42 checking machine... 2023/06/19 16:02:42 checking revisions... [ 60.195393] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:02:42 testing simple program... [ 60.239439] cgroup: Unknown subsys name 'net' [ 60.299861] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:02:16 Registers: info registers vcpu 0 RAX=ffff888019978148 RBX=ffff888019978148 RCX=ffffffff812e0423 RDX=0000000000000000 RSI=0000000000000004 RDI=ffff888019978148 RBP=ffff888019978148 RSP=ffff888006b3fc28 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffff888019978198 R13=ffff888019978148 R14=ffff888019978250 R15=ffff888019978198 RIP=ffffffff8180eeb6 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 00007fc832ddb900 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=00007ffe1acf5000 CR3=00000000145ae000 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=6720646572637465733a4d41503d706f 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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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 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=00007f78de96d3a0 CR3=000000000e610000 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=2031343a32303a3631203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031343a32303a3631203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000