syzkaller login: [ 31.170396] BUG: Bad rss-counter state mm:00000000fb4719da type:MM_FILEPAGES val:33 [ 31.172345] BUG: Bad rss-counter state mm:00000000fb4719da type:MM_ANONPAGES val:22 [ 31.409266] ================================================================== [ 31.410167] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.411103] Read of size 8 at addr ffff8880198cdd08 by task sshd/220 [ 31.411870] [ 31.412088] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.413129] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.414098] Call Trace: [ 31.414414] [ 31.414716] dump_stack_lvl+0x91/0xf0 [ 31.415211] print_report+0xcc/0x620 [ 31.415690] ? __virt_addr_valid+0x102/0x340 [ 31.416242] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.416867] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.417485] kasan_report+0xbe/0xf0 [ 31.417957] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.418578] vma_interval_tree_remove+0xc75/0xec0 [ 31.419174] vma_prepare+0xc54/0x11a0 [ 31.419647] __split_vma+0x5af/0x950 [ 31.420117] ? __pfx___split_vma+0x10/0x10 [ 31.420643] ? find_held_lock+0x2c/0x110 [ 31.421178] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.421752] ? lock_is_held_type+0x9f/0x120 [ 31.422314] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.422925] ? mtree_range_walk+0x632/0x900 [ 31.423479] ? mas_walk+0x5c7/0x7c0 [ 31.423955] do_vmi_munmap+0x1f1/0x2b0 [ 31.424445] mmap_region+0x1f9/0x2660 [ 31.424946] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.425457] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.426169] ? __pfx_lock_acquire+0x10/0x10 [ 31.426700] ? __pfx_mmap_region+0x10/0x10 [ 31.427245] ? security_mmap_addr+0x7d/0xa0 [ 31.427773] ? get_unmapped_area+0x1f5/0x3f0 [ 31.428327] do_mmap+0x854/0xf00 [ 31.428776] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.429273] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.429835] ksys_mmap_pgoff+0x3af/0x500 [ 31.430347] do_syscall_64+0x3f/0x90 [ 31.430828] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.431489] RIP: 0033:0x7fa64e67bd82 [ 31.431950] 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 [ 31.434074] RSP: 002b:00007ffcc17d0208 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.435002] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa64e67bd82 [ 31.435859] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa64dab5000 [ 31.436722] RBP: 00007fa64dab5000 R08: 0000000000000009 R09: 0000000000001000 [ 31.437571] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c5e136bec0 [ 31.438413] R13: 00007ffcc17d0220 R14: 00007ffcc17d0250 R15: 00007ffcc17d05b0 [ 31.439285] [ 31.439575] [ 31.439787] Allocated by task 213: [ 31.440223] kasan_save_stack+0x22/0x50 [ 31.440735] kasan_set_track+0x25/0x30 [ 31.441239] __kasan_slab_alloc+0x59/0x70 [ 31.441772] kmem_cache_alloc+0x16b/0x370 [ 31.442290] vm_area_dup+0x20/0x160 [ 31.442748] __split_vma+0x170/0x950 [ 31.443217] split_vma+0xc6/0x110 [ 31.443663] mprotect_fixup+0x8d2/0xb30 [ 31.444159] do_mprotect_pkey+0x87e/0xd40 [ 31.444678] __x64_sys_mprotect+0x78/0xc0 [ 31.445212] do_syscall_64+0x3f/0x90 [ 31.445687] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.446336] [ 31.446551] Freed by task 213: [ 31.446938] kasan_save_stack+0x22/0x50 [ 31.447441] kasan_set_track+0x25/0x30 [ 31.447938] kasan_save_free_info+0x2b/0x50 [ 31.448476] __kasan_slab_free+0x10a/0x190 [ 31.449024] kmem_cache_free+0x10d/0x4d0 [ 31.449529] rcu_core+0x8c8/0x2860 [ 31.449972] __do_softirq+0x1b7/0x7d4 [ 31.450457] [ 31.450676] Last potentially related work creation: [ 31.451275] kasan_save_stack+0x22/0x50 [ 31.451787] __kasan_record_aux_stack+0x8e/0xa0 [ 31.452361] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.453018] remove_vma+0x139/0x170 [ 31.453466] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.454024] do_vmi_munmap+0x1f1/0x2b0 [ 31.454509] __vm_munmap+0x138/0x3a0 [ 31.454974] __x64_sys_munmap+0x59/0x80 [ 31.455467] do_syscall_64+0x3f/0x90 [ 31.455942] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.456595] [ 31.456815] The buggy address belongs to the object at ffff8880198cdcb0 [ 31.456815] which belongs to the cache vm_area_struct of size 168 [ 31.458278] The buggy address is located 88 bytes inside of [ 31.458278] freed 168-byte region [ffff8880198cdcb0, ffff8880198cdd58) [ 31.459680] [ 31.459894] The buggy address belongs to the physical page: [ 31.460557] page:00000000b6df7f2c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x198cd [ 31.461668] memcg:ffff888017f4d701 [ 31.462093] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.462735] page_type: 0xffffffff() [ 31.463184] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.464102] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888017f4d701 [ 31.465017] page dumped because: kasan: bad access detected [ 31.465676] [ 31.465892] Memory state around the buggy address: [ 31.466469] ffff8880198cdc00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 31.467319] ffff8880198cdc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.468163] >ffff8880198cdd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.469019] ^ [ 31.469465] ffff8880198cdd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.470321] ffff8880198cde00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.471171] ================================================================== [ 31.472202] Disabling lock debugging due to kernel taint [ 33.860095] BUG: Bad rss-counter state mm:000000006cc26082 type:MM_FILEPAGES val:33 [ 33.861276] BUG: Bad rss-counter state mm:000000006cc26082 type:MM_ANONPAGES val:22 [ 34.285208] BUG: Bad rss-counter state mm:00000000e3aca7d1 type:MM_FILEPAGES val:33 [ 34.286601] BUG: Bad rss-counter state mm:00000000e3aca7d1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:51123' (ECDSA) to the list of known hosts. 2023/06/20 13:30:30 fuzzer started 2023/06/20 13:30:30 dialing manager at localhost:36067 2023/06/20 13:30:30 checking machine... 2023/06/20 13:30:30 checking revisions... [ 35.026375] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:30:30 testing simple program... [ 35.077537] cgroup: Unknown subsys name 'net' [ 35.129397] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:30:30 Registers: info registers vcpu 0 RAX=0000000000000004 RBX=ffffed100d9c13b0 RCX=ffffffff812e0135 RDX=ffffed100d9c13af RSI=0000000000000004 RDI=ffff88806ce09d78 RBP=ffffed100d9c13af RSP=ffff88806ce09d30 R8 =0000000000000001 R9 =ffffed100d9c13af R10=ffff88806ce09d7b R11=00000000000b6a61 R12=ffffffff856d84a8 R13=ffffffff856d84b0 R14=ffffffff813782f8 R15=ffff888019e97a10 RIP=ffffffff8180f121 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 00007f7383c5a900 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=00007fff2b4c9000 CR3=000000000e4e6000 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=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 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=ffff888008c04400 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=00007f9fedc6f400 CR3=000000000ca6c000 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=e54b54bc461a14aa7e4205b023274d36 XMM02=000000000011ab78ec2efd57dc4c00df XMM03=00000000001220b834806f29cb53894f XMM04=dfd7a64e7eb2939d00000000000ae988 XMM05=e4cb8bb95a7664b60000000000131f10 XMM06=ec409ea8a46821c80000000000130d78 XMM07=e042d86d42eb936e0000000000122338 XMM08=34806f29cb53894f000000000011abd8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000