syzkaller login: [ 29.643575] BUG: Bad rss-counter state mm:000000001b3e270c type:MM_FILEPAGES val:33 [ 29.644868] BUG: Bad rss-counter state mm:000000001b3e270c type:MM_ANONPAGES val:22 [ 29.739179] ================================================================== [ 29.739891] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.740761] Read of size 8 at addr ffff88800e76d880 by task sshd/220 [ 29.741486] [ 29.741694] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 29.742537] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.743602] Call Trace: [ 29.743904] [ 29.744197] dump_stack_lvl+0x91/0xf0 [ 29.744671] print_report+0xcc/0x620 [ 29.745011] ? __virt_addr_valid+0x102/0x340 [ 29.745406] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.745840] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.746278] kasan_report+0xbe/0xf0 [ 29.746617] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.747052] vma_interval_tree_remove+0xc75/0xec0 [ 29.747479] vma_prepare+0xc54/0x11a0 [ 29.747817] __split_vma+0x5af/0x950 [ 29.748150] ? __pfx___split_vma+0x10/0x10 [ 29.748531] ? find_held_lock+0x2c/0x110 [ 29.748901] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.749303] ? lock_is_held_type+0x9f/0x120 [ 29.749683] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.750107] ? mtree_range_walk+0x632/0x900 [ 29.750495] ? mas_walk+0x5c7/0x7c0 [ 29.750827] do_vmi_munmap+0x1f1/0x2b0 [ 29.751170] mmap_region+0x1f9/0x2660 [ 29.751505] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.751866] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.752372] ? __pfx_lock_acquire+0x10/0x10 [ 29.752746] ? __pfx_mmap_region+0x10/0x10 [ 29.753116] ? security_mmap_addr+0x7d/0xa0 [ 29.753490] ? get_unmapped_area+0x1f5/0x3f0 [ 29.753874] do_mmap+0x854/0xf00 [ 29.754179] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.754526] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.754918] ksys_mmap_pgoff+0x3af/0x500 [ 29.755276] do_syscall_64+0x3f/0x90 [ 29.755611] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.756068] RIP: 0033:0x7f47b9ab8d82 [ 29.756407] 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 [ 29.757908] RSP: 002b:00007ffc4167cac8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.758549] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f47b9ab8d82 [ 29.759144] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f47b8ef2000 [ 29.759747] RBP: 00007f47b8ef2000 R08: 0000000000000009 R09: 0000000000001000 [ 29.760345] R10: 0000000000000812 R11: 0000000000000206 R12: 000056026fa30f70 [ 29.760935] R13: 00007ffc4167cae0 R14: 00007ffc4167cb10 R15: 00007ffc4167ce70 [ 29.761533] [ 29.761735] [ 29.761883] Allocated by task 213: [ 29.762183] kasan_save_stack+0x22/0x50 [ 29.762532] kasan_set_track+0x25/0x30 [ 29.762874] __kasan_slab_alloc+0x59/0x70 [ 29.763240] kmem_cache_alloc+0x16b/0x370 [ 29.763603] vm_area_dup+0x20/0x160 [ 29.763926] __split_vma+0x170/0x950 [ 29.764270] split_vma+0xc6/0x110 [ 29.764584] mprotect_fixup+0x8d2/0xb30 [ 29.764938] do_mprotect_pkey+0x87e/0xd40 [ 29.765306] __x64_sys_mprotect+0x78/0xc0 [ 29.765673] do_syscall_64+0x3f/0x90 [ 29.766006] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.766461] [ 29.766613] Freed by task 19: [ 29.766885] kasan_save_stack+0x22/0x50 [ 29.767237] kasan_set_track+0x25/0x30 [ 29.767584] kasan_save_free_info+0x2b/0x50 [ 29.767956] __kasan_slab_free+0x10a/0x190 [ 29.768332] kmem_cache_free+0x10d/0x4d0 [ 29.768686] rcu_core+0x8c8/0x2860 [ 29.768997] __do_softirq+0x1b7/0x7d4 [ 29.769333] [ 29.769482] Last potentially related work creation: [ 29.769890] kasan_save_stack+0x22/0x50 [ 29.770243] __kasan_record_aux_stack+0x8e/0xa0 [ 29.770642] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.771090] remove_vma+0x139/0x170 [ 29.771408] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.771800] do_vmi_munmap+0x1f1/0x2b0 [ 29.772142] __vm_munmap+0x138/0x3a0 [ 29.772446] __x64_sys_munmap+0x59/0x80 [ 29.772741] do_syscall_64+0x3f/0x90 [ 29.773007] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.773388] [ 29.773513] The buggy address belongs to the object at ffff88800e76d828 [ 29.773513] which belongs to the cache vm_area_struct of size 168 [ 29.774373] The buggy address is located 88 bytes inside of [ 29.774373] freed 168-byte region [ffff88800e76d828, ffff88800e76d8d0) [ 29.775197] [ 29.775322] The buggy address belongs to the physical page: [ 29.775704] page:00000000350d7c58 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe76d [ 29.776336] memcg:ffff888015ad4001 [ 29.776582] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.776959] page_type: 0xffffffff() [ 29.777222] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 29.777760] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015ad4001 [ 29.778286] page dumped because: kasan: bad access detected [ 29.778671] [ 29.778794] Memory state around the buggy address: [ 29.779126] ffff88800e76d780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 29.779641] ffff88800e76d800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 29.780144] >ffff88800e76d880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 29.780644] ^ [ 29.780879] ffff88800e76d900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.781374] ffff88800e76d980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 29.781871] ================================================================== [ 29.782478] Disabling lock debugging due to kernel taint [ 31.672688] BUG: Bad rss-counter state mm:000000009f25296b type:MM_FILEPAGES val:33 [ 31.673530] BUG: Bad rss-counter state mm:000000009f25296b type:MM_ANONPAGES val:22 [ 32.174491] BUG: Bad rss-counter state mm:000000004823cb18 type:MM_FILEPAGES val:33 [ 32.175675] BUG: Bad rss-counter state mm:000000004823cb18 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:13360' (ECDSA) to the list of known hosts. 2023/06/21 10:40:48 fuzzer started 2023/06/21 10:40:48 dialing manager at localhost:36067 2023/06/21 10:40:48 checking machine... 2023/06/21 10:40:48 checking revisions... [ 32.888013] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:40:48 testing simple program... [ 32.937718] cgroup: Unknown subsys name 'net' [ 32.975831] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:40:48 Registers: info registers vcpu 0 RAX=ffffffff85d3d350 RBX=0000000000000000 RCX=ffffffff815343f6 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffffffff8118dbd8 RSP=ffff88800909fae8 R8 =0000000000000000 R9 =ffffed1001b56c13 R10=ffff88800dab609b R11=0000000000000000 R12=ffff88800dab64f8 R13=00000000000000e5 R14=ffff888008fe8000 R15=ffff88800dab6000 RIP=ffffffff8180f036 RFL=00000002 [-------] 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 00007fcb34d4e900 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=00007ffcfd585000 CR3=0000000018db0000 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=ffff88806cf09b30 RBX=0000000000000002 RCX=0000000000000002 RDX=ffff88806cf09a01 RSI=ffff88806cf09a68 RDI=ffff88806cf09a68 RBP=ffff88806cf09af0 RSP=ffff88806cf099d8 R8 =0000000000000001 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000006097 R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88806cf09a68 R15=ffff88806cf09a98 RIP=ffffffff81131236 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=00007fc35d4a46b0 CR3=000000000e666000 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=2038343a30343a3031203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037343a30343a3031203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000