syzkaller login: [ 38.892936] BUG: Bad rss-counter state mm:00000000cdf9faa3 type:MM_FILEPAGES val:33 [ 38.893745] BUG: Bad rss-counter state mm:00000000cdf9faa3 type:MM_ANONPAGES val:22 [ 38.925615] ================================================================== [ 38.926453] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.927090] Read of size 8 at addr ffff888019e78228 by task sshd/218 [ 38.927603] [ 38.927755] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.928345] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.929005] Call Trace: [ 38.929227] [ 38.929470] dump_stack_lvl+0x91/0xf0 [ 38.929837] print_report+0xcc/0x620 [ 38.930196] ? __virt_addr_valid+0x102/0x340 [ 38.930572] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.931009] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.931583] kasan_report+0xbe/0xf0 [ 38.931890] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.932314] vma_interval_tree_remove+0xc75/0xec0 [ 38.932713] vma_prepare+0xc54/0x11a0 [ 38.933025] __split_vma+0x5af/0x950 [ 38.933321] ? __pfx___split_vma+0x10/0x10 [ 38.933705] ? find_held_lock+0x2c/0x110 [ 38.934074] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.934452] ? lock_is_held_type+0x9f/0x120 [ 38.934832] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.935277] ? mtree_range_walk+0x632/0x900 [ 38.935667] ? mas_walk+0x5c7/0x7c0 [ 38.935997] do_vmi_munmap+0x1f1/0x2b0 [ 38.936343] mmap_region+0x1f9/0x2660 [ 38.936681] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.937040] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.937557] ? __pfx_lock_acquire+0x10/0x10 [ 38.937934] ? __pfx_mmap_region+0x10/0x10 [ 38.938290] ? security_mmap_addr+0x7d/0xa0 [ 38.938655] ? get_unmapped_area+0x1f5/0x3f0 [ 38.939023] do_mmap+0x854/0xf00 [ 38.939320] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.939661] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.940073] ksys_mmap_pgoff+0x3af/0x500 [ 38.940432] do_syscall_64+0x3f/0x90 [ 38.940773] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.941266] RIP: 0033:0x7f8ac32b3d82 [ 38.941643] 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 [ 38.943141] RSP: 002b:00007ffd63de0788 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.943797] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8ac32b3d82 [ 38.944381] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8ac26ed000 [ 38.944969] RBP: 00007f8ac26ed000 R08: 0000000000000009 R09: 0000000000001000 [ 38.945592] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557b3fcb1d90 [ 38.946157] R13: 00007ffd63de07a0 R14: 00007ffd63de07d0 R15: 00007ffd63de0b30 [ 38.946741] [ 38.946939] [ 38.947081] Allocated by task 211: [ 38.947363] kasan_save_stack+0x22/0x50 [ 38.947715] kasan_set_track+0x25/0x30 [ 38.948054] __kasan_slab_alloc+0x59/0x70 [ 38.948394] kmem_cache_alloc+0x16b/0x370 [ 38.948725] vm_area_dup+0x20/0x160 [ 38.949031] __split_vma+0x170/0x950 [ 38.949355] split_vma+0xc6/0x110 [ 38.949696] mprotect_fixup+0x8d2/0xb30 [ 38.950037] do_mprotect_pkey+0x87e/0xd40 [ 38.950389] __x64_sys_mprotect+0x78/0xc0 [ 38.950741] do_syscall_64+0x3f/0x90 [ 38.951061] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.951503] [ 38.951647] Freed by task 211: [ 38.951901] kasan_save_stack+0x22/0x50 [ 38.952231] kasan_set_track+0x25/0x30 [ 38.952566] kasan_save_free_info+0x2b/0x50 [ 38.952938] __kasan_slab_free+0x10a/0x190 [ 38.953301] kmem_cache_free+0x10d/0x4d0 [ 38.953653] rcu_core+0x8c8/0x2860 [ 38.953941] __do_softirq+0x1b7/0x7d4 [ 38.954256] [ 38.954400] Last potentially related work creation: [ 38.954786] kasan_save_stack+0x22/0x50 [ 38.955132] __kasan_record_aux_stack+0x8e/0xa0 [ 38.955516] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.955942] remove_vma+0x139/0x170 [ 38.956253] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.956626] do_vmi_munmap+0x1f1/0x2b0 [ 38.956951] __vm_munmap+0x138/0x3a0 [ 38.957258] __x64_sys_munmap+0x59/0x80 [ 38.957621] do_syscall_64+0x3f/0x90 [ 38.957943] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.958372] [ 38.958515] The buggy address belongs to the object at ffff888019e781d0 [ 38.958515] which belongs to the cache vm_area_struct of size 168 [ 38.959513] The buggy address is located 88 bytes inside of [ 38.959513] freed 168-byte region [ffff888019e781d0, ffff888019e78278) [ 38.960462] [ 38.960607] The buggy address belongs to the physical page: [ 38.961051] page:00000000b279e7fe refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19e78 [ 38.961838] memcg:ffff888019fe2301 [ 38.962131] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.962568] page_type: 0xffffffff() [ 38.962862] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 38.963469] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019fe2301 [ 38.964052] page dumped because: kasan: bad access detected [ 38.964491] [ 38.964626] Memory state around the buggy address: [ 38.965051] ffff888019e78100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.965661] ffff888019e78180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 38.966270] >ffff888019e78200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 38.966843] ^ [ 38.967220] ffff888019e78280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 38.967787] ffff888019e78300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 38.968365] ================================================================== [ 38.969054] Disabling lock debugging due to kernel taint [ 40.779507] BUG: Bad rss-counter state mm:000000009ae08119 type:MM_FILEPAGES val:33 [ 40.780548] BUG: Bad rss-counter state mm:000000009ae08119 type:MM_ANONPAGES val:22 [ 41.154955] BUG: Bad rss-counter state mm:000000000f3c7d11 type:MM_FILEPAGES val:33 [ 41.155678] BUG: Bad rss-counter state mm:000000000f3c7d11 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:21979' (ECDSA) to the list of known hosts. 2023/06/21 09:37:43 fuzzer started 2023/06/21 09:37:43 dialing manager at localhost:36067 2023/06/21 09:37:43 checking machine... 2023/06/21 09:37:43 checking revisions... [ 41.700644] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:37:43 testing simple program... [ 41.734484] cgroup: Unknown subsys name 'net' [ 41.765343] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:37:43 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007ffc5786fdc8 CR3=000000000fcd6000 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=2033343a37333a3930203132206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033343a37333a3930203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88800ee40001 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff88800ee40001 RSI=ffff88800ee3ff58 RDI=ffff88800ee3ffd8 RBP=ffff88806cf09ac8 RSP=ffff88806cf099f8 R8 =ffffffff864bbb58 R9 =ffff88806cf09ab0 R10=0000000000038001 R11=00000000000b6a61 R12=ffff88806cf09ad0 R13=ffff88806cf09ab8 R14=ffff88800ee3ff58 R15=ffff88806cf09a70 RIP=ffffffff8112fbf0 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 00007f2cb49f9900 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=00007fff35834000 CR3=0000000016366000 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=2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c XMM01=00ff00000000000000000000000000ff XMM02=00ff00000000000000000000000000ff XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=6500273d2720676e6974636570786500 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000