syzkaller login: [ 31.231791] BUG: Bad rss-counter state mm:000000003b1fff45 type:MM_FILEPAGES val:33 [ 31.232953] BUG: Bad rss-counter state mm:000000003b1fff45 type:MM_ANONPAGES val:22 [ 31.313577] ================================================================== [ 31.314562] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.315484] Read of size 8 at addr ffff88800e24c5c8 by task sshd/220 [ 31.316332] [ 31.316556] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.317446] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.318475] Call Trace: [ 31.318811] [ 31.319103] dump_stack_lvl+0x91/0xf0 [ 31.319612] print_report+0xcc/0x620 [ 31.320107] ? __virt_addr_valid+0x102/0x340 [ 31.320677] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.321321] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.321963] kasan_report+0xbe/0xf0 [ 31.322461] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.323093] vma_interval_tree_remove+0xc75/0xec0 [ 31.323708] vma_prepare+0xc54/0x11a0 [ 31.324196] __split_vma+0x5af/0x950 [ 31.324684] ? __pfx___split_vma+0x10/0x10 [ 31.325222] ? find_held_lock+0x2c/0x110 [ 31.325783] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.326376] ? lock_is_held_type+0x9f/0x120 [ 31.326926] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.327552] ? mtree_range_walk+0x632/0x900 [ 31.328121] ? mas_walk+0x5c7/0x7c0 [ 31.328606] do_vmi_munmap+0x1f1/0x2b0 [ 31.329104] mmap_region+0x1f9/0x2660 [ 31.329597] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.330131] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.330861] ? __pfx_lock_acquire+0x10/0x10 [ 31.331404] ? __pfx_mmap_region+0x10/0x10 [ 31.331949] ? security_mmap_addr+0x7d/0xa0 [ 31.332497] ? get_unmapped_area+0x1f5/0x3f0 [ 31.333059] do_mmap+0x854/0xf00 [ 31.333509] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.334020] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.334605] ksys_mmap_pgoff+0x3af/0x500 [ 31.335126] do_syscall_64+0x3f/0x90 [ 31.335616] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.336286] RIP: 0033:0x7fd2d1372d82 [ 31.336754] 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 [ 31.338969] RSP: 002b:00007ffd856a8bb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.339910] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd2d1372d82 [ 31.340792] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd2d07ac000 [ 31.341675] RBP: 00007fd2d07ac000 R08: 0000000000000009 R09: 0000000000001000 [ 31.342512] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556fd349fec0 [ 31.343343] R13: 00007ffd856a8bd0 R14: 00007ffd856a8c00 R15: 00007ffd856a8f60 [ 31.344184] [ 31.344477] [ 31.344687] Allocated by task 213: [ 31.345106] kasan_save_stack+0x22/0x50 [ 31.345602] kasan_set_track+0x25/0x30 [ 31.346096] __kasan_slab_alloc+0x59/0x70 [ 31.346615] kmem_cache_alloc+0x16b/0x370 [ 31.347123] vm_area_dup+0x20/0x160 [ 31.347581] __split_vma+0x170/0x950 [ 31.348041] split_vma+0xc6/0x110 [ 31.348479] mprotect_fixup+0x8d2/0xb30 [ 31.348972] do_mprotect_pkey+0x87e/0xd40 [ 31.349488] __x64_sys_mprotect+0x78/0xc0 [ 31.350027] do_syscall_64+0x3f/0x90 [ 31.350499] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.351139] [ 31.351350] Freed by task 213: [ 31.351738] kasan_save_stack+0x22/0x50 [ 31.352232] kasan_set_track+0x25/0x30 [ 31.352720] kasan_save_free_info+0x2b/0x50 [ 31.353243] __kasan_slab_free+0x10a/0x190 [ 31.353778] kmem_cache_free+0x10d/0x4d0 [ 31.354278] rcu_core+0x8c8/0x2860 [ 31.354714] __do_softirq+0x1b7/0x7d4 [ 31.355187] [ 31.355402] Last potentially related work creation: [ 31.355976] kasan_save_stack+0x22/0x50 [ 31.356475] __kasan_record_aux_stack+0x8e/0xa0 [ 31.357036] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.357668] remove_vma+0x139/0x170 [ 31.358132] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.358679] do_vmi_munmap+0x1f1/0x2b0 [ 31.359165] __vm_munmap+0x138/0x3a0 [ 31.359656] __x64_sys_munmap+0x59/0x80 [ 31.360171] do_syscall_64+0x3f/0x90 [ 31.360661] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.361320] [ 31.361539] The buggy address belongs to the object at ffff88800e24c570 [ 31.361539] which belongs to the cache vm_area_struct of size 168 [ 31.363031] The buggy address is located 88 bytes inside of [ 31.363031] freed 168-byte region [ffff88800e24c570, ffff88800e24c618) [ 31.364457] [ 31.364674] The buggy address belongs to the physical page: [ 31.365340] page:000000001aeda88b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe24c [ 31.366479] memcg:ffff888014428201 [ 31.366912] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.367626] page_type: 0xffffffff() [ 31.368082] raw: 0100000000000200 ffff8880087a0c80 ffffea0000367dc0 dead000000000007 [ 31.369007] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888014428201 [ 31.369933] page dumped because: kasan: bad access detected [ 31.370595] [ 31.370813] Memory state around the buggy address: [ 31.371387] ffff88800e24c480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.372258] ffff88800e24c500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 31.373117] >ffff88800e24c580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.373981] ^ [ 31.374657] ffff88800e24c600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.375509] ffff88800e24c680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.376360] ================================================================== [ 31.377334] Disabling lock debugging due to kernel taint [ 33.310121] BUG: Bad rss-counter state mm:0000000013598a17 type:MM_FILEPAGES val:33 [ 33.311047] BUG: Bad rss-counter state mm:0000000013598a17 type:MM_ANONPAGES val:22 [ 33.768419] BUG: Bad rss-counter state mm:000000002bb8c377 type:MM_FILEPAGES val:33 [ 33.769389] BUG: Bad rss-counter state mm:000000002bb8c377 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:24933' (ECDSA) to the list of known hosts. 2023/06/20 23:11:19 fuzzer started 2023/06/20 23:11:19 dialing manager at localhost:36067 2023/06/20 23:11:19 checking machine... 2023/06/20 23:11:19 checking revisions... [ 34.457651] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:11:19 testing simple program... [ 34.507448] cgroup: Unknown subsys name 'net' [ 34.547790] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:11:19 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff863b3266 RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff8880145ff840 RSP=ffff8880145ff778 R8 =ffffffff863b326a R9 =ffff8880145ff828 R10=0000000000038001 R11=000000000008a8e5 R12=ffff8880145ff848 R13=ffff8880145ff830 R14=0000000000000005 R15=ffff8880145ff7e8 RIP=ffffffff81130b2b RFL=00000297 [--S-APC] 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 00007ff34a558900 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=00007ffcfdb14000 CR3=000000000e360000 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=00000000000000000000000000000000 XMM01=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 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=0000000000000001 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=00007fc18e6b3fd0 CR3=000000000c5de000 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=4de27a7d5be2039c2945d7b373095298 XMM02=000000000011a920eff9b2d0a8fce9cb XMM03=000000000011a9f02c67c8bc2e329bc3 XMM04=6b1bb80c33a0044200000000000ae988 XMM05=a848122a4902536e0000000000132b30 XMM06=4fda316b135da52b0000000000131bd0 XMM07=e042d86d42eb936e0000000000122188 XMM08=12bd1760b9a55ba1000000000011a9f0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000