syzkaller login: [ 32.335664] BUG: Bad rss-counter state mm:000000000de60981 type:MM_FILEPAGES val:33 [ 32.336957] BUG: Bad rss-counter state mm:000000000de60981 type:MM_ANONPAGES val:22 [ 32.514682] ================================================================== [ 32.515852] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.516969] Read of size 8 at addr ffff88800ea866b0 by task sshd/220 [ 32.517907] [ 32.518157] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.519155] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.520290] Call Trace: [ 32.520667] <TASK> [ 32.520995] dump_stack_lvl+0x91/0xf0 [ 32.521566] print_report+0xcc/0x620 [ 32.522137] ? __virt_addr_valid+0x102/0x340 [ 32.522788] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.523487] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.524194] kasan_report+0xbe/0xf0 [ 32.524741] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.525469] vma_interval_tree_remove+0xc75/0xec0 [ 32.526242] vma_prepare+0xc54/0x11a0 [ 32.526857] __split_vma+0x5af/0x950 [ 32.527470] ? __pfx___split_vma+0x10/0x10 [ 32.528165] ? find_held_lock+0x2c/0x110 [ 32.528837] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.529567] ? lock_is_held_type+0x9f/0x120 [ 32.530275] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.531079] ? mtree_range_walk+0x632/0x900 [ 32.531785] ? mas_walk+0x5c7/0x7c0 [ 32.532396] do_vmi_munmap+0x1f1/0x2b0 [ 32.533033] mmap_region+0x1f9/0x2660 [ 32.533680] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.534326] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.535050] ? __pfx_lock_acquire+0x10/0x10 [ 32.535598] ? __pfx_mmap_region+0x10/0x10 [ 32.536132] ? security_mmap_addr+0x7d/0xa0 [ 32.536675] ? get_unmapped_area+0x1f5/0x3f0 [ 32.537229] do_mmap+0x854/0xf00 [ 32.537691] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.538208] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.538785] ksys_mmap_pgoff+0x3af/0x500 [ 32.539302] do_syscall_64+0x3f/0x90 [ 32.539791] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.540445] RIP: 0033:0x7f6eff1cdd82 [ 32.540904] 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 [ 32.543086] RSP: 002b:00007ffec67f5d18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.544099] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6eff1cdd82 [ 32.545049] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6efe607000 [ 32.546013] RBP: 00007f6efe607000 R08: 0000000000000009 R09: 0000000000001000 [ 32.546957] R10: 0000000000000812 R11: 0000000000000206 R12: 000056484e4a0ec0 [ 32.547902] R13: 00007ffec67f5d30 R14: 00007ffec67f5d60 R15: 00007ffec67f60c0 [ 32.548859] </TASK> [ 32.549183] [ 32.549423] Allocated by task 213: [ 32.549908] kasan_save_stack+0x22/0x50 [ 32.550469] kasan_set_track+0x25/0x30 [ 32.551019] __kasan_slab_alloc+0x59/0x70 [ 32.551604] kmem_cache_alloc+0x16b/0x370 [ 32.552179] vm_area_dup+0x20/0x160 [ 32.552687] __split_vma+0x170/0x950 [ 32.553205] split_vma+0xc6/0x110 [ 32.553717] mprotect_fixup+0x8d2/0xb30 [ 32.554277] do_mprotect_pkey+0x87e/0xd40 [ 32.554855] __x64_sys_mprotect+0x78/0xc0 [ 32.555437] do_syscall_64+0x3f/0x90 [ 32.555965] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.556683] [ 32.556918] Freed by task 213: [ 32.557357] kasan_save_stack+0x22/0x50 [ 32.557925] kasan_set_track+0x25/0x30 [ 32.558476] kasan_save_free_info+0x2b/0x50 [ 32.559069] __kasan_slab_free+0x10a/0x190 [ 32.559659] kmem_cache_free+0x10d/0x4d0 [ 32.560226] rcu_core+0x8c8/0x2860 [ 32.560726] __do_softirq+0x1b7/0x7d4 [ 32.561258] [ 32.561496] Last potentially related work creation: [ 32.562335] kasan_save_stack+0x22/0x50 [ 32.562985] __kasan_record_aux_stack+0x8e/0xa0 [ 32.563703] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.564499] remove_vma+0x139/0x170 [ 32.565067] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.565790] do_vmi_munmap+0x1f1/0x2b0 [ 32.566408] __vm_munmap+0x138/0x3a0 [ 32.567008] __x64_sys_munmap+0x59/0x80 [ 32.567638] do_syscall_64+0x3f/0x90 [ 32.568233] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.569036] [ 32.569310] The buggy address belongs to the object at ffff88800ea86658 [ 32.569310] which belongs to the cache vm_area_struct of size 168 [ 32.571177] The buggy address is located 88 bytes inside of [ 32.571177] freed 168-byte region [ffff88800ea86658, ffff88800ea86700) [ 32.572934] [ 32.573199] The buggy address belongs to the physical page: [ 32.574071] page:00000000f017cb92 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xea86 [ 32.575293] memcg:ffff88800ebf7301 [ 32.575734] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.576403] page_type: 0xffffffff() [ 32.576879] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.577815] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ebf7301 [ 32.578710] page dumped because: kasan: bad access detected [ 32.579365] [ 32.579583] Memory state around the buggy address: [ 32.580186] ffff88800ea86580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.581042] ffff88800ea86600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 32.581905] >ffff88800ea86680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.582744] ^ [ 32.583326] ffff88800ea86700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 32.584211] ffff88800ea86780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 32.585064] ================================================================== [ 32.586328] Disabling lock debugging due to kernel taint [ 34.705643] BUG: Bad rss-counter state mm:00000000512be596 type:MM_FILEPAGES val:33 [ 34.706787] BUG: Bad rss-counter state mm:00000000512be596 type:MM_ANONPAGES val:22 [ 35.153316] BUG: Bad rss-counter state mm:0000000071e6590d type:MM_FILEPAGES val:33 [ 35.154946] BUG: Bad rss-counter state mm:0000000071e6590d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:63994' (ECDSA) to the list of known hosts. 2023/06/19 18:07:52 fuzzer started 2023/06/19 18:07:53 dialing manager at localhost:44161 2023/06/19 18:07:53 checking machine... 2023/06/19 18:07:53 checking revisions... [ 35.881883] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:07:53 testing simple program... [ 35.923598] cgroup: Unknown subsys name 'net' [ 35.959589] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:07:50 Registers: info registers vcpu 0 RAX=0000000000000d68 RBX=00007ff2b1fe14a0 RCX=0000000000000c00 RDX=00007ffcf2d4e2c0 RSI=0000000000000003 RDI=0000000000000001 RBP=00005654b158af80 RSP=00007ffcf2d4e2b8 R8 =0000000000000001 R9 =0000000000000001 R10=0000000000000000 R11=0000000000000246 R12=00007ff2b1a2d900 R13=00007ffcf2d4e458 R14=0000000000000000 R15=0000000000000001 RIP=00007ff2b1f0f3e3 RFL=00000202 [-------] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007ff2b1a2d900 00000000 00000000 GS =0000 0000000000000000 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=00007ff2b1fe2650 CR3=000000000c6b4000 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=2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c XMM01=00ff00000000000000000000000000ff XMM02=00ff00000000000000000000000000ff XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=6500273d2720676e6974636570786500 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007ffdeb193fa8 CR3=0000000018026000 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=2032353a37303a3831203931206e754a XMM01=657463656e6e6f63736944203a5d3033 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3033325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032353a37303a3831203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000