syzkaller login: [ 60.387708] BUG: Bad rss-counter state mm:000000001250b76d type:MM_FILEPAGES val:33 [ 60.388792] BUG: Bad rss-counter state mm:000000001250b76d type:MM_ANONPAGES val:22 [ 60.424816] ================================================================== [ 60.425515] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 60.426230] Read of size 8 at addr ffff888019a4b5c8 by task sshd/221 [ 60.426807] [ 60.426971] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 60.427631] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 60.428387] Call Trace: [ 60.428633] [ 60.428849] dump_stack_lvl+0x91/0xf0 [ 60.429225] print_report+0xcc/0x620 [ 60.429677] ? __virt_addr_valid+0x102/0x340 [ 60.430102] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.430572] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.431046] kasan_report+0xbe/0xf0 [ 60.431409] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.431902] vma_interval_tree_remove+0xc75/0xec0 [ 60.432350] vma_prepare+0xc54/0x11a0 [ 60.432612] __split_vma+0x5af/0x950 [ 60.432875] ? __pfx___split_vma+0x10/0x10 [ 60.433162] ? find_held_lock+0x2c/0x110 [ 60.433448] do_vmi_align_munmap+0x2ba/0x11f0 [ 60.433754] ? lock_is_held_type+0x9f/0x120 [ 60.434050] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 60.434383] ? mtree_range_walk+0x632/0x900 [ 60.434702] ? mas_walk+0x5c7/0x7c0 [ 60.434974] do_vmi_munmap+0x1f1/0x2b0 [ 60.435263] mmap_region+0x1f9/0x2660 [ 60.435541] ? vm_mmap_pgoff+0x15c/0x3a0 [ 60.435839] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 60.436257] ? __pfx_lock_acquire+0x10/0x10 [ 60.436567] ? __pfx_mmap_region+0x10/0x10 [ 60.436877] ? security_mmap_addr+0x7d/0xa0 [ 60.437190] ? get_unmapped_area+0x1f5/0x3f0 [ 60.437512] do_mmap+0x854/0xf00 [ 60.437763] vm_mmap_pgoff+0x1a6/0x3a0 [ 60.438050] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 60.438369] ksys_mmap_pgoff+0x3af/0x500 [ 60.438659] do_syscall_64+0x3f/0x90 [ 60.438934] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.439304] RIP: 0033:0x7f3e84ecdd82 [ 60.439563] 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 [ 60.440894] RSP: 002b:00007ffe2fcf67b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 60.441405] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3e84ecdd82 [ 60.441895] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3e84307000 [ 60.442373] RBP: 00007f3e84307000 R08: 0000000000000009 R09: 0000000000001000 [ 60.442860] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558f8ce0cec0 [ 60.443347] R13: 00007ffe2fcf67d0 R14: 00007ffe2fcf6800 R15: 00007ffe2fcf6b60 [ 60.443854] [ 60.444019] [ 60.444140] Allocated by task 214: [ 60.444382] kasan_save_stack+0x22/0x50 [ 60.444679] kasan_set_track+0x25/0x30 [ 60.444960] __kasan_slab_alloc+0x59/0x70 [ 60.445264] kmem_cache_alloc+0x16b/0x370 [ 60.445557] vm_area_dup+0x20/0x160 [ 60.445817] __split_vma+0x170/0x950 [ 60.446082] split_vma+0xc6/0x110 [ 60.446332] mprotect_fixup+0x8d2/0xb30 [ 60.446623] do_mprotect_pkey+0x87e/0xd40 [ 60.446930] __x64_sys_mprotect+0x78/0xc0 [ 60.447229] do_syscall_64+0x3f/0x90 [ 60.447502] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.447889] [ 60.448010] Freed by task 214: [ 60.448240] kasan_save_stack+0x22/0x50 [ 60.448528] kasan_set_track+0x25/0x30 [ 60.448810] kasan_save_free_info+0x2b/0x50 [ 60.449114] __kasan_slab_free+0x10a/0x190 [ 60.449421] kmem_cache_free+0x10d/0x4d0 [ 60.449711] rcu_core+0x8c8/0x2860 [ 60.449971] __do_softirq+0x1b7/0x7d4 [ 60.450244] [ 60.450361] Last potentially related work creation: [ 60.450705] kasan_save_stack+0x22/0x50 [ 60.450994] __kasan_record_aux_stack+0x8e/0xa0 [ 60.451322] __call_rcu_common.constprop.0+0x6a/0xb90 [ 60.451694] remove_vma+0x139/0x170 [ 60.451960] do_vmi_align_munmap+0xd4a/0x11f0 [ 60.452281] do_vmi_munmap+0x1f1/0x2b0 [ 60.452560] __vm_munmap+0x138/0x3a0 [ 60.452829] __x64_sys_munmap+0x59/0x80 [ 60.453115] do_syscall_64+0x3f/0x90 [ 60.453381] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.453749] [ 60.453878] The buggy address belongs to the object at ffff888019a4b570 [ 60.453878] which belongs to the cache vm_area_struct of size 168 [ 60.454730] The buggy address is located 88 bytes inside of [ 60.454730] freed 168-byte region [ffff888019a4b570, ffff888019a4b618) [ 60.455532] [ 60.455656] The buggy address belongs to the physical page: [ 60.456046] page:00000000b723f53d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19a4b [ 60.456673] memcg:ffff888017ffcc01 [ 60.456921] flags: 0x100000000000200(slab|node=0|zone=1) [ 60.457290] page_type: 0xffffffff() [ 60.457543] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 60.458078] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888017ffcc01 [ 60.458594] page dumped because: kasan: bad access detected [ 60.458972] [ 60.459093] Memory state around the buggy address: [ 60.459424] ffff888019a4b480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 60.459932] ffff888019a4b500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 60.460422] >ffff888019a4b580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 60.460909] ^ [ 60.461295] ffff888019a4b600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 60.461777] ffff888019a4b680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 60.462261] ================================================================== [ 60.462805] Disabling lock debugging due to kernel taint [ 62.693822] BUG: Bad rss-counter state mm:000000002fdcee33 type:MM_FILEPAGES val:33 [ 62.695266] BUG: Bad rss-counter state mm:000000002fdcee33 type:MM_ANONPAGES val:22 [ 63.214862] BUG: Bad rss-counter state mm:0000000082d3ab03 type:MM_FILEPAGES val:33 [ 63.215675] BUG: Bad rss-counter state mm:0000000082d3ab03 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:7617' (ECDSA) to the list of known hosts. 2023/06/21 01:59:54 fuzzer started 2023/06/21 01:59:54 dialing manager at localhost:36067 2023/06/21 01:59:54 checking machine... 2023/06/21 01:59:54 checking revisions... [ 63.985750] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:59:54 testing simple program... [ 64.033157] cgroup: Unknown subsys name 'net' [ 64.082774] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:59:54 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000018 RCX=ffffffff816b0b2d RDX=fffffbfff0a828a9 RSI=0000000000000008 RDI=ffffffff85414540 RBP=000000000003fda0 RSP=ffff888016a47620 R8 =0000000000000001 R9 =fffffbfff0a828a8 R10=ffffffff85414547 R11=0000000000019c10 R12=ffff88807ffdc980 R13=0000000000000000 R14=0000000000015e58 R15=ffff88807ffdc500 RIP=ffffffff816b0b35 RFL=00000012 [----A--] 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 00007f34ea140700 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=000055f9735db290 CR3=000000001a4fc000 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=2033353a39353a3130203132206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033353a39353a3130203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=0000000000000000 RCX=ffffea000040e400 RDX=0000000000000000 RSI=ffff888010390980 RDI=ffffed1002072130 RBP=ffffffff813782f8 RSP=ffff888008e37ce8 R8 =0000000000000130 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000128 R12=ffff888010390980 R13=ffff88800844f780 R14=ffffffff813782f8 R15=ffff888010390a00 RIP=ffffffff8180ca30 RFL=00000202 [-------] 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=00007ffd1e2bc000 CR3=000000000e11a000 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