syzkaller login: [ 29.047767] sshd (212) used greatest stack depth: 24128 bytes left [ 29.048894] BUG: Bad rss-counter state mm:000000001b5bd545 type:MM_FILEPAGES val:33 [ 29.050141] BUG: Bad rss-counter state mm:000000001b5bd545 type:MM_ANONPAGES val:22 [ 29.163761] ================================================================== [ 29.164758] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.165772] Read of size 8 at addr ffff88800dea9880 by task sshd/220 [ 29.166718] [ 29.166951] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 29.167886] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.168946] Call Trace: [ 29.169288] <TASK> [ 29.169592] dump_stack_lvl+0x91/0xf0 [ 29.170118] print_report+0xcc/0x620 [ 29.170670] ? __virt_addr_valid+0x102/0x340 [ 29.171265] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.171923] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.172578] kasan_report+0xbe/0xf0 [ 29.173088] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.173756] vma_interval_tree_remove+0xc75/0xec0 [ 29.174411] vma_prepare+0xc54/0x11a0 [ 29.174928] __split_vma+0x5af/0x950 [ 29.175430] ? __pfx___split_vma+0x10/0x10 [ 29.175995] ? find_held_lock+0x2c/0x110 [ 29.176563] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.177174] ? lock_is_held_type+0x9f/0x120 [ 29.177760] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.178409] ? mtree_range_walk+0x632/0x900 [ 29.179013] ? mas_walk+0x5c7/0x7c0 [ 29.179530] do_vmi_munmap+0x1f1/0x2b0 [ 29.180060] mmap_region+0x1f9/0x2660 [ 29.180590] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.181142] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.181901] ? __pfx_lock_acquire+0x10/0x10 [ 29.182486] ? __pfx_mmap_region+0x10/0x10 [ 29.183055] ? security_mmap_addr+0x7d/0xa0 [ 29.183629] ? get_unmapped_area+0x1f5/0x3f0 [ 29.184227] do_mmap+0x854/0xf00 [ 29.184704] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.185238] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.185841] ksys_mmap_pgoff+0x3af/0x500 [ 29.186401] do_syscall_64+0x3f/0x90 [ 29.186925] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.187622] RIP: 0033:0x7fbc156add82 [ 29.188125] 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 [ 29.190441] RSP: 002b:00007fffe01adaf8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.191413] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbc156add82 [ 29.192324] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbc14ae7000 [ 29.193242] RBP: 00007fbc14ae7000 R08: 0000000000000009 R09: 0000000000001000 [ 29.194161] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a15f282ec0 [ 29.195078] R13: 00007fffe01adb10 R14: 00007fffe01adb40 R15: 00007fffe01adea0 [ 29.196001] </TASK> [ 29.196318] [ 29.196550] Allocated by task 212: [ 29.197018] kasan_save_stack+0x22/0x50 [ 29.197553] kasan_set_track+0x25/0x30 [ 29.198083] __kasan_slab_alloc+0x59/0x70 [ 29.198677] kmem_cache_alloc+0x16b/0x370 [ 29.199237] vm_area_dup+0x20/0x160 [ 29.199734] __split_vma+0x170/0x950 [ 29.200233] split_vma+0xc6/0x110 [ 29.200709] mprotect_fixup+0x8d2/0xb30 [ 29.201255] do_mprotect_pkey+0x87e/0xd40 [ 29.201820] __x64_sys_mprotect+0x78/0xc0 [ 29.202403] do_syscall_64+0x3f/0x90 [ 29.202907] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.203599] [ 29.203831] Freed by task 212: [ 29.204255] kasan_save_stack+0x22/0x50 [ 29.204803] kasan_set_track+0x25/0x30 [ 29.205336] kasan_save_free_info+0x2b/0x50 [ 29.205899] __kasan_slab_free+0x10a/0x190 [ 29.206487] kmem_cache_free+0x10d/0x4d0 [ 29.207034] rcu_core+0x8c8/0x2860 [ 29.207511] __do_softirq+0x1b7/0x7d4 [ 29.208029] [ 29.208266] Last potentially related work creation: [ 29.208894] kasan_save_stack+0x22/0x50 [ 29.209442] __kasan_record_aux_stack+0x8e/0xa0 [ 29.210055] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.210757] remove_vma+0x139/0x170 [ 29.211247] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.211852] do_vmi_munmap+0x1f1/0x2b0 [ 29.212379] __vm_munmap+0x138/0x3a0 [ 29.212887] __x64_sys_munmap+0x59/0x80 [ 29.213430] do_syscall_64+0x3f/0x90 [ 29.213952] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.214658] [ 29.214901] The buggy address belongs to the object at ffff88800dea9828 [ 29.214901] which belongs to the cache vm_area_struct of size 168 [ 29.216494] The buggy address is located 88 bytes inside of [ 29.216494] freed 168-byte region [ffff88800dea9828, ffff88800dea98d0) [ 29.218006] [ 29.218255] The buggy address belongs to the physical page: [ 29.218969] page:000000003966e80a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdea9 [ 29.220135] memcg:ffff888016444e01 [ 29.220598] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.221287] page_type: 0xffffffff() [ 29.221779] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 29.222782] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016444e01 [ 29.223772] page dumped because: kasan: bad access detected [ 29.224487] [ 29.224716] Memory state around the buggy address: [ 29.225343] ffff88800dea9780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 29.226285] ffff88800dea9800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 29.227206] >ffff88800dea9880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 29.228123] ^ [ 29.228573] ffff88800dea9900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.229503] ffff88800dea9980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 29.230424] ================================================================== [ 29.231710] Disabling lock debugging due to kernel taint [ 31.307314] BUG: Bad rss-counter state mm:00000000f3710fcb type:MM_FILEPAGES val:33 [ 31.308593] BUG: Bad rss-counter state mm:00000000f3710fcb type:MM_ANONPAGES val:22 [ 31.751802] BUG: Bad rss-counter state mm:000000008df27b21 type:MM_FILEPAGES val:33 [ 31.752600] BUG: Bad rss-counter state mm:000000008df27b21 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:50543' (ECDSA) to the list of known hosts. 2023/06/21 08:45:13 fuzzer started 2023/06/21 08:45:14 dialing manager at localhost:36067 2023/06/21 08:45:14 checking machine... 2023/06/21 08:45:14 checking revisions... [ 32.437019] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:45:14 testing simple program... [ 32.487284] cgroup: Unknown subsys name 'net' [ 32.539921] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:45:13 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=0000000000000000 RDX=ffff888019f8b680 RSI=ffffffff8162a1d7 RDI=0000000000000001 RBP=ffffea00006baa00 RSP=ffff88801cb978f0 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000000 R12=ffffea00006baa34 R13=dffffc0000000000 R14=0000000000000000 R15=ffff88801cb97938 RIP=ffffffff814c089b 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 00007f790892f900 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=00007ffe55904000 CR3=000000000d8a6000 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=2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c XMM01=00ff00000000000000000000000000ff XMM02=00ff00000000000000000000000000ff XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=6500273d2720676e6974636570786500 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007f798a4bfeb8 CR3=000000000cc08000 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=a1b48e8bac576a9d5f4fc529302f4c51 XMM02=000000000011b5c8eff9b2d0a8fce9cb XMM03=000000000011b6982c67c8bc2e329bc3 XMM04=4e4251bbac59529f00000000000ae988 XMM05=e4cb8bb95a7664b60000000000131f80 XMM06=a6a9e50e80c255400000000000130de8 XMM07=e042d86d42eb936e0000000000122228 XMM08=2253e26e24d85ead000000000011b698 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000