[ 38.721150] BUG: Bad rss-counter state mm:00000000ef96e1a3 type:MM_FILEPAGES val:33 [ 38.722472] BUG: Bad rss-counter state mm:00000000ef96e1a3 type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 38.898336] ================================================================== [ 38.899316] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.900265] Read of size 8 at addr ffff88800e3d5880 by task sshd/218 [ 38.901140] [ 38.901363] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.902243] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.903247] Call Trace: [ 38.903566] [ 38.903858] dump_stack_lvl+0x91/0xf0 [ 38.904350] print_report+0xcc/0x620 [ 38.904842] ? __virt_addr_valid+0x102/0x340 [ 38.905408] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.906050] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.906668] kasan_report+0xbe/0xf0 [ 38.907152] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.907777] vma_interval_tree_remove+0xc75/0xec0 [ 38.908388] vma_prepare+0xc54/0x11a0 [ 38.908870] __split_vma+0x5af/0x950 [ 38.909345] ? __pfx___split_vma+0x10/0x10 [ 38.909891] ? find_held_lock+0x2c/0x110 [ 38.910414] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.910985] ? lock_is_held_type+0x9f/0x120 [ 38.911531] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.912142] ? mtree_range_walk+0x632/0x900 [ 38.912699] ? mas_walk+0x5c7/0x7c0 [ 38.913177] do_vmi_munmap+0x1f1/0x2b0 [ 38.913679] mmap_region+0x1f9/0x2660 [ 38.914164] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.914680] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.915390] ? __pfx_lock_acquire+0x10/0x10 [ 38.915932] ? __pfx_mmap_region+0x10/0x10 [ 38.916485] ? security_mmap_addr+0x7d/0xa0 [ 38.917039] ? get_unmapped_area+0x1f5/0x3f0 [ 38.917608] do_mmap+0x854/0xf00 [ 38.918082] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.918586] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.919147] ksys_mmap_pgoff+0x3af/0x500 [ 38.919663] do_syscall_64+0x3f/0x90 [ 38.920148] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.920812] RIP: 0033:0x7f4d421e8d82 [ 38.921283] 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 [ 38.923452] RSP: 002b:00007ffe266eced8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.924385] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4d421e8d82 [ 38.925250] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4d41622000 [ 38.926132] RBP: 00007f4d41622000 R08: 0000000000000009 R09: 0000000000001000 [ 38.926979] R10: 0000000000000812 R11: 0000000000000206 R12: 000055582f8cbec0 [ 38.927825] R13: 00007ffe266ecef0 R14: 00007ffe266ecf20 R15: 00007ffe266ed280 [ 38.928689] [ 38.928984] [ 38.929202] Allocated by task 211: [ 38.929644] kasan_save_stack+0x22/0x50 [ 38.930162] kasan_set_track+0x25/0x30 [ 38.930659] __kasan_slab_alloc+0x59/0x70 [ 38.931183] kmem_cache_alloc+0x16b/0x370 [ 38.931704] vm_area_dup+0x20/0x160 [ 38.932159] __split_vma+0x170/0x950 [ 38.932624] split_vma+0xc6/0x110 [ 38.933062] mprotect_fixup+0x8d2/0xb30 [ 38.933566] do_mprotect_pkey+0x87e/0xd40 [ 38.934105] __x64_sys_mprotect+0x78/0xc0 [ 38.934632] do_syscall_64+0x3f/0x90 [ 38.935127] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.935789] [ 38.936008] Freed by task 211: [ 38.936416] kasan_save_stack+0x22/0x50 [ 38.936931] kasan_set_track+0x25/0x30 [ 38.937429] kasan_save_free_info+0x2b/0x50 [ 38.937979] __kasan_slab_free+0x10a/0x190 [ 38.938522] kmem_cache_free+0x10d/0x4d0 [ 38.939045] rcu_core+0x8c8/0x2860 [ 38.939504] __do_softirq+0x1b7/0x7d4 [ 38.939993] [ 38.940210] Last potentially related work creation: [ 38.940805] kasan_save_stack+0x22/0x50 [ 38.941317] __kasan_record_aux_stack+0x8e/0xa0 [ 38.941918] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.942577] remove_vma+0x139/0x170 [ 38.943037] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.943596] do_vmi_munmap+0x1f1/0x2b0 [ 38.944080] __vm_munmap+0x138/0x3a0 [ 38.944549] __x64_sys_munmap+0x59/0x80 [ 38.945049] do_syscall_64+0x3f/0x90 [ 38.945530] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.946183] [ 38.946401] Second to last potentially related work creation: [ 38.947092] kasan_save_stack+0x22/0x50 [ 38.947600] __kasan_record_aux_stack+0x8e/0xa0 [ 38.948175] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.948825] remove_vma+0x139/0x170 [ 38.949284] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.949860] do_vmi_munmap+0x1f1/0x2b0 [ 38.950363] __vm_munmap+0x138/0x3a0 [ 38.950831] __x64_sys_munmap+0x59/0x80 [ 38.951350] do_syscall_64+0x3f/0x90 [ 38.951828] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.952474] [ 38.952688] The buggy address belongs to the object at ffff88800e3d5828 [ 38.952688] which belongs to the cache vm_area_struct of size 168 [ 38.954192] The buggy address is located 88 bytes inside of [ 38.954192] freed 168-byte region [ffff88800e3d5828, ffff88800e3d58d0) [ 38.955629] [ 38.955847] The buggy address belongs to the physical page: [ 38.956515] page:00000000e2340abf refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe3d5 [ 38.957609] memcg:ffff888009873801 [ 38.958065] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.958772] page_type: 0xffffffff() [ 38.959237] raw: 0100000000000200 ffff8880087a0c80 ffffea00003b1b80 dead000000000005 [ 38.960172] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009873801 [ 38.961080] page dumped because: kasan: bad access detected [ 38.961758] [ 38.961979] Memory state around the buggy address: [ 38.962555] ffff88800e3d5780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 38.963413] ffff88800e3d5800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 38.964276] >ffff88800e3d5880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 38.965134] ^ [ 38.965549] ffff88800e3d5900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.966419] ffff88800e3d5980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 38.967273] ================================================================== [ 38.968247] Disabling lock debugging due to kernel taint [ 41.230065] BUG: Bad rss-counter state mm:00000000b129a2f2 type:MM_FILEPAGES val:33 [ 41.231047] BUG: Bad rss-counter state mm:00000000b129a2f2 type:MM_ANONPAGES val:22 [ 41.636732] BUG: Bad rss-counter state mm:00000000a56c3569 type:MM_FILEPAGES val:33 [ 41.637373] BUG: Bad rss-counter state mm:00000000a56c3569 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:43528' (ECDSA) to the list of known hosts. 2023/06/20 14:16:38 fuzzer started 2023/06/20 14:16:38 dialing manager at localhost:36067 2023/06/20 14:16:38 checking machine... 2023/06/20 14:16:38 checking revisions... [ 42.300676] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:16:38 testing simple program... [ 42.340265] cgroup: Unknown subsys name 'net' [ 42.379595] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:16:38 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=0000000000000000 RCX=ffffffff814c856d RDX=ffff888016641b40 RSI=0000000000000000 RDI=0000000000000005 RBP=0000000000000000 RSP=ffff88800c5eeb98 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85652d08 R15=ffff88800c5ef0e8 RIP=ffffffff814c086b 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 0000000000000000 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=00007f483f7f3368 CR3=000000000c474000 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=756e696c2d34365f3638782f62696c2f XMM01=322e6f732e6c6462696c2f756e672d78 XMM02=00322e6f732e6c6462696c2f756e672d XMM03=78756e696c2d34365f3638782f62696c XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff11001c787dc RBX=ffff88800e3c3ea8 RCX=ffffffff812e0135 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800e3c3ee0 RBP=ffff888013a6aa00 RSP=ffff888018147a18 R8 =0000000000000001 R9 =ffffed1003028f37 R10=0000000000000003 R11=00000000000b6a61 R12=dffffc0000000000 R13=ffff888013a6aa00 R14=ffffffff844ae5be R15=0000000000000000 RIP=ffffffff81846501 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 00007f86769c1900 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=000055dbd10a6b88 CR3=0000000018fe0000 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