syzkaller login: [ 28.395655] BUG: Bad rss-counter state mm:00000000700090a2 type:MM_FILEPAGES val:33 [ 28.397118] BUG: Bad rss-counter state mm:00000000700090a2 type:MM_ANONPAGES val:22 [ 28.548412] ================================================================== [ 28.549512] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.550641] Read of size 8 at addr ffff888010161df0 by task sshd/219 [ 28.551709] [ 28.551973] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 28.552987] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.554117] Call Trace: [ 28.554439] [ 28.554720] dump_stack_lvl+0x91/0xf0 [ 28.555226] print_report+0xcc/0x620 [ 28.555710] ? __virt_addr_valid+0x102/0x340 [ 28.556269] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.556891] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.557525] kasan_report+0xbe/0xf0 [ 28.558009] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.558632] vma_interval_tree_remove+0xc75/0xec0 [ 28.559243] vma_prepare+0xc54/0x11a0 [ 28.559721] __split_vma+0x5af/0x950 [ 28.560191] ? __pfx___split_vma+0x10/0x10 [ 28.560719] ? find_held_lock+0x2c/0x110 [ 28.561266] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.561826] ? lock_is_held_type+0x9f/0x120 [ 28.562362] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.562966] ? mtree_range_walk+0x632/0x900 [ 28.563515] ? mas_walk+0x5c7/0x7c0 [ 28.563992] do_vmi_munmap+0x1f1/0x2b0 [ 28.564484] mmap_region+0x1f9/0x2660 [ 28.564968] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.565486] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.566197] ? __pfx_lock_acquire+0x10/0x10 [ 28.566727] ? __pfx_mmap_region+0x10/0x10 [ 28.567258] ? security_mmap_addr+0x7d/0xa0 [ 28.567791] ? get_unmapped_area+0x1f5/0x3f0 [ 28.568340] do_mmap+0x854/0xf00 [ 28.568782] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.569287] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.569858] ksys_mmap_pgoff+0x3af/0x500 [ 28.570369] do_syscall_64+0x3f/0x90 [ 28.570846] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.571492] RIP: 0033:0x7efcb7618d82 [ 28.571951] 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 [ 28.574112] RSP: 002b:00007ffd7b2c0d28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.575008] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007efcb7618d82 [ 28.575852] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007efcb6a52000 [ 28.576698] RBP: 00007efcb6a52000 R08: 0000000000000009 R09: 0000000000001000 [ 28.577561] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c2fba21980 [ 28.578415] R13: 00007ffd7b2c0d40 R14: 00007ffd7b2c0d70 R15: 00007ffd7b2c10d0 [ 28.579271] [ 28.579567] [ 28.579784] Allocated by task 212: [ 28.580222] kasan_save_stack+0x22/0x50 [ 28.580725] kasan_set_track+0x25/0x30 [ 28.581226] __kasan_slab_alloc+0x59/0x70 [ 28.581750] kmem_cache_alloc+0x16b/0x370 [ 28.582262] vm_area_dup+0x20/0x160 [ 28.582720] __split_vma+0x170/0x950 [ 28.583187] split_vma+0xc6/0x110 [ 28.583631] mprotect_fixup+0x8d2/0xb30 [ 28.584134] do_mprotect_pkey+0x87e/0xd40 [ 28.584651] __x64_sys_mprotect+0x78/0xc0 [ 28.585185] do_syscall_64+0x3f/0x90 [ 28.585658] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.586295] [ 28.586511] Freed by task 210: [ 28.586903] kasan_save_stack+0x22/0x50 [ 28.587408] kasan_set_track+0x25/0x30 [ 28.587898] kasan_save_free_info+0x2b/0x50 [ 28.588430] __kasan_slab_free+0x10a/0x190 [ 28.588968] kmem_cache_free+0x10d/0x4d0 [ 28.589489] rcu_core+0x8c8/0x2860 [ 28.589938] __do_softirq+0x1b7/0x7d4 [ 28.590414] [ 28.590637] Last potentially related work creation: [ 28.591219] kasan_save_stack+0x22/0x50 [ 28.591724] __kasan_record_aux_stack+0x8e/0xa0 [ 28.592364] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.593016] remove_vma+0x139/0x170 [ 28.593489] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.594049] do_vmi_munmap+0x1f1/0x2b0 [ 28.594531] __vm_munmap+0x138/0x3a0 [ 28.594998] __x64_sys_munmap+0x59/0x80 [ 28.595496] do_syscall_64+0x3f/0x90 [ 28.595966] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.596607] [ 28.596822] The buggy address belongs to the object at ffff888010161d98 [ 28.596822] which belongs to the cache vm_area_struct of size 168 [ 28.598293] The buggy address is located 88 bytes inside of [ 28.598293] freed 168-byte region [ffff888010161d98, ffff888010161e40) [ 28.599692] [ 28.599907] The buggy address belongs to the physical page: [ 28.600574] page:00000000144a8bc3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10161 [ 28.601674] memcg:ffff888019c6e501 [ 28.602105] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 28.602801] page_type: 0xffffffff() [ 28.603250] raw: 0100000000000200 ffff88800879fc80 ffffea00003643c0 dead000000000003 [ 28.604172] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019c6e501 [ 28.605105] page dumped because: kasan: bad access detected [ 28.605766] [ 28.605980] Memory state around the buggy address: [ 28.606557] ffff888010161c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 28.607410] ffff888010161d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 28.608268] >ffff888010161d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 28.609127] ^ [ 28.609928] ffff888010161e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 28.610781] ffff888010161e80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 28.611638] ================================================================== [ 28.612561] Disabling lock debugging due to kernel taint [ 30.481499] BUG: Bad rss-counter state mm:0000000087e2b91e type:MM_FILEPAGES val:33 [ 30.482258] BUG: Bad rss-counter state mm:0000000087e2b91e type:MM_ANONPAGES val:22 [ 30.879322] BUG: Bad rss-counter state mm:00000000b7e4c287 type:MM_FILEPAGES val:33 [ 30.880100] BUG: Bad rss-counter state mm:00000000b7e4c287 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:54117' (ECDSA) to the list of known hosts. 2023/06/19 15:20:52 fuzzer started 2023/06/19 15:20:53 dialing manager at localhost:44161 2023/06/19 15:20:53 checking machine... 2023/06/19 15:20:53 checking revisions... [ 31.562299] kmemleak: Automatic memory scanning thread ended 2023/06/19 15:20:53 testing simple program... [ 31.607707] cgroup: Unknown subsys name 'net' [ 31.707813] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:20:48 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce35000 RCX=ffffffff812d8ec3 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=0000000000000000 RSP=ffff888018f1f980 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=6873733d6c616e69 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff8135b910 RFL=00000216 [----AP-] 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 00007fe730f52900 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=00007fff47dc8000 CR3=000000000f69a000 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=ffffffff84531c17 RBX=ffffffff8605061c RCX=ffffffff84531da6 RDX=0000000000000000 RSI=ffffffff864b4f38 RDI=ffffffff8605061c RBP=ffffffff86050620 RSP=ffff88806cf099e0 R8 =ffffffff864b4f38 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=00000000000b5c92 R12=ffffffff8605061c R13=ffffffff8605061c R14=0000000000000000 R15=dffffc0000000000 RIP=ffffffff8112fca7 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 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=00007f6766545570 CR3=000000000d65e000 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=123493ee5832f8b8a44da889dd7f20b1 XMM02=000000000011fcc0ec2efd57dc4c00df XMM03=000000000012396855d442bc0419c0f9 XMM04=9c9af568b23ac7da00000000000ae988 XMM05=dfcdbad4f1609c370000000000133520 XMM06=e9d9d63a24f6ac920000000000131f90 XMM07=e042d86d42eb936e0000000000123c40 XMM08=55d442bc0419c0f9000000000011fd20 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000