syzkaller login: [ 38.799961] BUG: Bad rss-counter state mm:0000000059110d54 type:MM_FILEPAGES val:33 [ 38.801306] BUG: Bad rss-counter state mm:0000000059110d54 type:MM_ANONPAGES val:22 [ 38.841645] ================================================================== [ 38.842637] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.843719] Read of size 8 at addr ffff88800fe026b0 by task sshd/219 [ 38.844665] [ 38.844909] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.845857] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.846906] Call Trace: [ 38.847229] [ 38.847508] dump_stack_lvl+0x91/0xf0 [ 38.848083] print_report+0xcc/0x620 [ 38.848612] ? __virt_addr_valid+0x102/0x340 [ 38.849162] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.849770] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.850382] kasan_report+0xbe/0xf0 [ 38.850871] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.851494] vma_interval_tree_remove+0xc75/0xec0 [ 38.852102] vma_prepare+0xc54/0x11a0 [ 38.852580] __split_vma+0x5af/0x950 [ 38.853047] ? __pfx___split_vma+0x10/0x10 [ 38.853570] ? find_held_lock+0x2c/0x110 [ 38.854092] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.854646] ? lock_is_held_type+0x9f/0x120 [ 38.855200] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.855798] ? mtree_range_walk+0x632/0x900 [ 38.856344] ? mas_walk+0x5c7/0x7c0 [ 38.856818] do_vmi_munmap+0x1f1/0x2b0 [ 38.857303] mmap_region+0x1f9/0x2660 [ 38.857780] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.858286] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.859025] ? __pfx_lock_acquire+0x10/0x10 [ 38.859551] ? __pfx_mmap_region+0x10/0x10 [ 38.860076] ? security_mmap_addr+0x7d/0xa0 [ 38.860606] ? get_unmapped_area+0x1f5/0x3f0 [ 38.861146] do_mmap+0x854/0xf00 [ 38.861577] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.862067] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.862619] ksys_mmap_pgoff+0x3af/0x500 [ 38.863133] do_syscall_64+0x3f/0x90 [ 38.863605] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.864239] RIP: 0033:0x7fab95e8bd82 [ 38.864699] 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 [ 38.866816] RSP: 002b:00007ffed9047288 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.867706] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fab95e8bd82 [ 38.868541] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fab952c5000 [ 38.869378] RBP: 00007fab952c5000 R08: 0000000000000009 R09: 0000000000001000 [ 38.870214] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f1fb7e3ec0 [ 38.871070] R13: 00007ffed90472a0 R14: 00007ffed90472d0 R15: 00007ffed9047630 [ 38.871918] [ 38.872205] [ 38.872418] Allocated by task 212: [ 38.872839] kasan_save_stack+0x22/0x50 [ 38.873339] kasan_set_track+0x25/0x30 [ 38.873823] __kasan_slab_alloc+0x59/0x70 [ 38.874339] kmem_cache_alloc+0x16b/0x370 [ 38.874854] vm_area_dup+0x20/0x160 [ 38.875321] __split_vma+0x170/0x950 [ 38.875778] split_vma+0xc6/0x110 [ 38.876210] mprotect_fixup+0x8d2/0xb30 [ 38.876709] do_mprotect_pkey+0x87e/0xd40 [ 38.877225] __x64_sys_mprotect+0x78/0xc0 [ 38.877747] do_syscall_64+0x3f/0x90 [ 38.878214] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.878867] [ 38.879079] Freed by task 212: [ 38.879468] kasan_save_stack+0x22/0x50 [ 38.879967] kasan_set_track+0x25/0x30 [ 38.880461] kasan_save_free_info+0x2b/0x50 [ 38.880984] __kasan_slab_free+0x10a/0x190 [ 38.881510] kmem_cache_free+0x10d/0x4d0 [ 38.882015] rcu_core+0x8c8/0x2860 [ 38.882456] __do_softirq+0x1b7/0x7d4 [ 38.882947] [ 38.883159] Last potentially related work creation: [ 38.883744] kasan_save_stack+0x22/0x50 [ 38.884244] __kasan_record_aux_stack+0x8e/0xa0 [ 38.884814] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.885446] remove_vma+0x139/0x170 [ 38.885891] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.886442] do_vmi_munmap+0x1f1/0x2b0 [ 38.887043] __vm_munmap+0x138/0x3a0 [ 38.887504] __x64_sys_munmap+0x59/0x80 [ 38.888000] do_syscall_64+0x3f/0x90 [ 38.888471] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.889105] [ 38.889319] Second to last potentially related work creation: [ 38.889996] kasan_save_stack+0x22/0x50 [ 38.890490] __kasan_record_aux_stack+0x8e/0xa0 [ 38.891073] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.891707] remove_vma+0x139/0x170 [ 38.892158] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.892714] do_vmi_munmap+0x1f1/0x2b0 [ 38.893196] mmap_region+0x1f9/0x2660 [ 38.893671] do_mmap+0x854/0xf00 [ 38.894098] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.894581] ksys_mmap_pgoff+0x3af/0x500 [ 38.895082] do_syscall_64+0x3f/0x90 [ 38.895550] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.896185] [ 38.896401] The buggy address belongs to the object at ffff88800fe02658 [ 38.896401] which belongs to the cache vm_area_struct of size 168 [ 38.897855] The buggy address is located 88 bytes inside of [ 38.897855] freed 168-byte region [ffff88800fe02658, ffff88800fe02700) [ 38.899239] [ 38.899453] The buggy address belongs to the physical page: [ 38.900108] page:000000008f877198 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfe02 [ 38.901194] memcg:ffff888016f07c01 [ 38.901615] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.902262] page_type: 0xffffffff() [ 38.902713] raw: 0100000000000200 ffff8880087a0c80 ffffea000039a3c0 dead000000000008 [ 38.903656] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016f07c01 [ 38.904572] page dumped because: kasan: bad access detected [ 38.905224] [ 38.905439] Memory state around the buggy address: [ 38.906019] ffff88800fe02580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.906883] ffff88800fe02600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 38.907737] >ffff88800fe02680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.908593] ^ [ 38.909178] ffff88800fe02700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 38.910030] ffff88800fe02780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 38.910878] ================================================================== [ 38.911784] Disabling lock debugging due to kernel taint [ 41.868359] BUG: Bad rss-counter state mm:0000000011b6ea2f type:MM_FILEPAGES val:33 [ 41.869715] BUG: Bad rss-counter state mm:0000000011b6ea2f type:MM_ANONPAGES val:22 [ 42.466718] BUG: Bad rss-counter state mm:00000000191738a6 type:MM_FILEPAGES val:33 [ 42.467883] BUG: Bad rss-counter state mm:00000000191738a6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:2583' (ECDSA) to the list of known hosts. 2023/06/21 06:19:01 fuzzer started 2023/06/21 06:19:01 dialing manager at localhost:36067 2023/06/21 06:19:01 checking machine... 2023/06/21 06:19:01 checking revisions... [ 43.097749] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:19:01 testing simple program... [ 43.147624] cgroup: Unknown subsys name 'net' [ 43.184150] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:19:01 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff8880181d3000 RCX=0000000000000000 RDX=1ffff11002bba968 RSI=ffffffff83651479 RDI=0000000000000005 RBP=ffff888015dd4b40 RSP=ffff88801020f808 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=000008f2000008f2 R12=ffff8880181d3248 R13=ffff888015dd4b00 R14=ffff8880181d3579 R15=ffff8880181d3600 RIP=ffffffff83651498 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 00007f1c3dd83900 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=00007f1c3e33a618 CR3=0000000016f42000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=0000000000000000 RCX=ffffffff810fd04a RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffff888008e07dc8 RSP=ffff88806cf09ff0 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000000 R12=0000000000000001 R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8118dd30 RFL=00000002 [-------] 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=00007fa28bdd9590 CR3=000000000e040000 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=2030303a39313a3630203132206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030303a39313a3630203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000