syzkaller login: [ 36.902929] BUG: Bad rss-counter state mm:00000000ab1ace6f type:MM_FILEPAGES val:33 [ 36.905129] BUG: Bad rss-counter state mm:00000000ab1ace6f type:MM_ANONPAGES val:22 [ 37.088155] ================================================================== [ 37.089162] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 37.090413] Read of size 8 at addr ffff88800df46df0 by task sshd/220 [ 37.091407] [ 37.091655] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 37.092590] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 37.093633] Call Trace: [ 37.093973] [ 37.094275] dump_stack_lvl+0x91/0xf0 [ 37.094830] print_report+0xcc/0x620 [ 37.095347] ? __virt_addr_valid+0x102/0x340 [ 37.095949] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.096631] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.097323] kasan_report+0xbe/0xf0 [ 37.097845] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.098534] vma_interval_tree_remove+0xc75/0xec0 [ 37.099211] vma_prepare+0xc54/0x11a0 [ 37.099740] __split_vma+0x5af/0x950 [ 37.100254] ? __pfx___split_vma+0x10/0x10 [ 37.100832] ? find_held_lock+0x2c/0x110 [ 37.101398] do_vmi_align_munmap+0x2ba/0x11f0 [ 37.102026] ? lock_is_held_type+0x9f/0x120 [ 37.102619] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 37.103270] ? mtree_range_walk+0x632/0x900 [ 37.103881] ? mas_walk+0x5c7/0x7c0 [ 37.104391] do_vmi_munmap+0x1f1/0x2b0 [ 37.104930] mmap_region+0x1f9/0x2660 [ 37.105469] ? vm_mmap_pgoff+0x15c/0x3a0 [ 37.106026] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 37.106822] ? __pfx_lock_acquire+0x10/0x10 [ 37.107396] ? __pfx_mmap_region+0x10/0x10 [ 37.107971] ? security_mmap_addr+0x7d/0xa0 [ 37.108548] ? get_unmapped_area+0x1f5/0x3f0 [ 37.109135] do_mmap+0x854/0xf00 [ 37.109620] vm_mmap_pgoff+0x1a6/0x3a0 [ 37.110155] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 37.110804] ksys_mmap_pgoff+0x3af/0x500 [ 37.111347] do_syscall_64+0x3f/0x90 [ 37.111873] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.112575] RIP: 0033:0x7f2083e11d82 [ 37.113060] 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 [ 37.115351] RSP: 002b:00007ffd9c1bf478 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 37.116365] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2083e11d82 [ 37.117300] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f208324b000 [ 37.118221] RBP: 00007f208324b000 R08: 0000000000000009 R09: 0000000000001000 [ 37.119178] R10: 0000000000000812 R11: 0000000000000206 R12: 000056330b829ec0 [ 37.120101] R13: 00007ffd9c1bf490 R14: 00007ffd9c1bf4c0 R15: 00007ffd9c1bf820 [ 37.121034] [ 37.121348] [ 37.121597] Allocated by task 213: [ 37.122069] kasan_save_stack+0x22/0x50 [ 37.122646] kasan_set_track+0x25/0x30 [ 37.123195] __kasan_slab_alloc+0x59/0x70 [ 37.123782] kmem_cache_alloc+0x16b/0x370 [ 37.124346] vm_area_dup+0x20/0x160 [ 37.124853] __split_vma+0x170/0x950 [ 37.125369] split_vma+0xc6/0x110 [ 37.125869] mprotect_fixup+0x8d2/0xb30 [ 37.126421] do_mprotect_pkey+0x87e/0xd40 [ 37.127028] __x64_sys_mprotect+0x78/0xc0 [ 37.127626] do_syscall_64+0x3f/0x90 [ 37.128137] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.128851] [ 37.129089] Freed by task 203: [ 37.129528] kasan_save_stack+0x22/0x50 [ 37.130081] kasan_set_track+0x25/0x30 [ 37.130642] kasan_save_free_info+0x2b/0x50 [ 37.131260] __kasan_slab_free+0x10a/0x190 [ 37.131860] kmem_cache_free+0x10d/0x4d0 [ 37.132419] rcu_core+0x8c8/0x2860 [ 37.132922] __do_softirq+0x1b7/0x7d4 [ 37.133452] [ 37.133699] Last potentially related work creation: [ 37.134337] kasan_save_stack+0x22/0x50 [ 37.134917] __kasan_record_aux_stack+0x8e/0xa0 [ 37.135562] __call_rcu_common.constprop.0+0x6a/0xb90 [ 37.136246] remove_vma+0x139/0x170 [ 37.136745] do_vmi_align_munmap+0xd4a/0x11f0 [ 37.137340] do_vmi_munmap+0x1f1/0x2b0 [ 37.137873] __vm_munmap+0x138/0x3a0 [ 37.138371] __x64_sys_munmap+0x59/0x80 [ 37.138923] do_syscall_64+0x3f/0x90 [ 37.139434] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.140132] [ 37.140365] The buggy address belongs to the object at ffff88800df46d98 [ 37.140365] which belongs to the cache vm_area_struct of size 168 [ 37.141959] The buggy address is located 88 bytes inside of [ 37.141959] freed 168-byte region [ffff88800df46d98, ffff88800df46e40) [ 37.143546] [ 37.143780] The buggy address belongs to the physical page: [ 37.144527] page:0000000059de1004 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdf46 [ 37.145718] memcg:ffff88800d940b01 [ 37.146172] flags: 0x100000000000200(slab|node=0|zone=1) [ 37.146906] page_type: 0xffffffff() [ 37.147404] raw: 0100000000000200 ffff88800879fc80 ffffea0000380600 dead000000000006 [ 37.148437] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d940b01 [ 37.149434] page dumped because: kasan: bad access detected [ 37.150176] [ 37.150417] Memory state around the buggy address: [ 37.151085] ffff88800df46c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 37.152040] ffff88800df46d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 37.152978] >ffff88800df46d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 37.153900] ^ [ 37.154791] ffff88800df46e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 37.155721] ffff88800df46e80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 37.156649] ================================================================== [ 37.158058] Disabling lock debugging due to kernel taint [ 38.493637] BUG: Bad rss-counter state mm:000000003dfbac05 type:MM_FILEPAGES val:33 [ 38.494814] BUG: Bad rss-counter state mm:000000003dfbac05 type:MM_ANONPAGES val:22 [ 38.845732] BUG: Bad rss-counter state mm:000000005724608c type:MM_FILEPAGES val:33 [ 38.846735] BUG: Bad rss-counter state mm:000000005724608c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:26734' (ECDSA) to the list of known hosts. 2023/06/20 06:48:53 fuzzer started 2023/06/20 06:48:53 dialing manager at localhost:44161 2023/06/20 06:48:53 checking machine... 2023/06/20 06:48:53 checking revisions... [ 39.519638] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:48:53 testing simple program... [ 39.559709] cgroup: Unknown subsys name 'net' [ 39.597332] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:48:47 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007f64ede36ad0 CR3=000000000c520000 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=9202fbcdba99c39b4840f678848c3d9e XMM02=000000000011cf88ec2efd57dc4c00df XMM03=00000000001244285e0b25ab22637560 XMM04=0599991cc5d4719b00000000000ae988 XMM05=19e9129bd510f2350000000000133fd0 XMM06=00f7789009460d360000000000132e38 XMM07=e042d86d42eb936e00000000001246a8 XMM08=5e0b25ab22637560000000000011cfe8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff888015c075e8 RCX=0000000000000001 RDX=1ffff11002b80ec8 RSI=ffff888015c07a70 RDI=ffffffff81ef1438 RBP=ffff888015c07640 RSP=ffff888015c075d0 R8 =0000000000000001 R9 =ffff888015c07628 R10=0000000000038001 R11=0000000000020c48 R12=ffff888015c076b0 R13=0000000000000000 R14=ffff88800f97d1c0 R15=0000000000092cc0 RIP=ffffffff811303b2 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 00007f6623018900 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=00007ffc67e20000 CR3=000000000e7b0000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000