[ 30.319927] BUG: Bad rss-counter state mm:00000000faf5fc26 type:MM_FILEPAGES val:33 [ 30.321420] BUG: Bad rss-counter state mm:00000000faf5fc26 type:MM_ANONPAGES val:22 [ 30.439934] ================================================================== [ 30.440907] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.441994] Read of size 8 at addr ffff88800e3a36b0 by task sshd/218 [ 30.442808] [ 30.443041] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.443986] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.445039] Call Trace: [ 30.445381] [ 30.445684] dump_stack_lvl+0x91/0xf0 [ 30.446238] print_report+0xcc/0x620 [ 30.446754] ? __virt_addr_valid+0x102/0x340 [ 30.447345] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.448005] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.448657] kasan_report+0xbe/0xf0 [ 30.449167] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.449845] vma_interval_tree_remove+0xc75/0xec0 [ 30.450497] vma_prepare+0xc54/0x11a0 [ 30.451017] __split_vma+0x5af/0x950 [ 30.451524] ? __pfx___split_vma+0x10/0x10 [ 30.452100] ? find_held_lock+0x2c/0x110 [ 30.452659] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.453266] ? lock_is_held_type+0x9f/0x120 [ 30.453856] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.454505] ? mtree_range_walk+0x632/0x900 [ 30.455096] ? mas_walk+0x5c7/0x7c0 [ 30.455607] do_vmi_munmap+0x1f1/0x2b0 [ 30.456141] mmap_region+0x1f9/0x2660 [ 30.456664] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.457215] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.458001] ? __pfx_lock_acquire+0x10/0x10 [ 30.458573] ? __pfx_mmap_region+0x10/0x10 [ 30.459144] ? security_mmap_addr+0x7d/0xa0 [ 30.459710] ? get_unmapped_area+0x1f5/0x3f0 [ 30.460300] do_mmap+0x854/0xf00 [ 30.460774] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.461304] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.461922] ksys_mmap_pgoff+0x3af/0x500 [ 30.462470] do_syscall_64+0x3f/0x90 [ 30.462984] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.463676] RIP: 0033:0x7fe683ad2d82 [ 30.464170] 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 [ 30.466457] RSP: 002b:00007ffc780d3998 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.467428] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe683ad2d82 [ 30.468339] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe682f0c000 [ 30.469244] RBP: 00007fe682f0c000 R08: 0000000000000009 R09: 0000000000001000 [ 30.470153] R10: 0000000000000812 R11: 0000000000000206 R12: 00005632fcd6dec0 [ 30.471062] R13: 00007ffc780d39b0 R14: 00007ffc780d39e0 R15: 00007ffc780d3d40 [ 30.471991] [ 30.472309] [ 30.472540] Allocated by task 211: [ 30.473002] kasan_save_stack+0x22/0x50 [ 30.473556] kasan_set_track+0x25/0x30 [ 30.474104] __kasan_slab_alloc+0x59/0x70 [ 30.474669] kmem_cache_alloc+0x16b/0x370 [ 30.475226] vm_area_dup+0x20/0x160 [ 30.475713] __split_vma+0x170/0x950 [ 30.476219] split_vma+0xc6/0x110 [ 30.476693] mprotect_fixup+0x8d2/0xb30 [ 30.477239] do_mprotect_pkey+0x87e/0xd40 [ 30.477842] __x64_sys_mprotect+0x78/0xc0 [ 30.478399] do_syscall_64+0x3f/0x90 [ 30.478910] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.479596] [ 30.479831] Freed by task 211: [ 30.480250] kasan_save_stack+0x22/0x50 [ 30.480791] kasan_set_track+0x25/0x30 [ 30.481327] kasan_save_free_info+0x2b/0x50 [ 30.481926] __kasan_slab_free+0x10a/0x190 [ 30.482497] kmem_cache_free+0x10d/0x4d0 [ 30.483046] rcu_core+0x8c8/0x2860 [ 30.483525] __do_softirq+0x1b7/0x7d4 [ 30.484043] [ 30.484274] Last potentially related work creation: [ 30.484906] kasan_save_stack+0x22/0x50 [ 30.485450] __kasan_record_aux_stack+0x8e/0xa0 [ 30.486068] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.486763] remove_vma+0x139/0x170 [ 30.487247] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.487847] do_vmi_munmap+0x1f1/0x2b0 [ 30.488368] __vm_munmap+0x138/0x3a0 [ 30.488872] __x64_sys_munmap+0x59/0x80 [ 30.489404] do_syscall_64+0x3f/0x90 [ 30.489921] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.490615] [ 30.490846] Second to last potentially related work creation: [ 30.491577] kasan_save_stack+0x22/0x50 [ 30.492117] __kasan_record_aux_stack+0x8e/0xa0 [ 30.492731] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.493425] remove_vma+0x139/0x170 [ 30.493925] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.494520] do_vmi_munmap+0x1f1/0x2b0 [ 30.495043] mmap_region+0x1f9/0x2660 [ 30.495559] do_mmap+0x854/0xf00 [ 30.496033] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.496562] ksys_mmap_pgoff+0x3af/0x500 [ 30.497103] do_syscall_64+0x3f/0x90 [ 30.497615] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.498312] [ 30.498548] The buggy address belongs to the object at ffff88800e3a3658 [ 30.498548] which belongs to the cache vm_area_struct of size 168 [ 30.500144] The buggy address is located 88 bytes inside of [ 30.500144] freed 168-byte region [ffff88800e3a3658, ffff88800e3a3700) [ 30.501665] [ 30.501919] The buggy address belongs to the physical page: [ 30.502628] page:00000000a58e2f69 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe3a3 [ 30.503805] memcg:ffff88800dde5801 [ 30.504265] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.505023] page_type: 0xffffffff() [ 30.505510] raw: 0100000000000200 ffff88800879fc80 ffffea0000513b00 dead000000000007 [ 30.506495] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dde5801 [ 30.507467] page dumped because: kasan: bad access detected [ 30.508172] [ 30.508403] Memory state around the buggy address: [ 30.509028] ffff88800e3a3580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.509954] ffff88800e3a3600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.510876] >ffff88800e3a3680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.511801] ^ [ 30.512438] ffff88800e3a3700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.513365] ffff88800e3a3780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.514294] ================================================================== [ 30.515351] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 32.499918] BUG: Bad rss-counter state mm:0000000077421a37 type:MM_FILEPAGES val:33 [ 32.500638] BUG: Bad rss-counter state mm:0000000077421a37 type:MM_ANONPAGES val:22 [ 32.935921] BUG: Bad rss-counter state mm:00000000d7b96a75 type:MM_FILEPAGES val:33 [ 32.937012] BUG: Bad rss-counter state mm:00000000d7b96a75 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:31144' (ECDSA) to the list of known hosts. 2023/06/19 16:37:44 fuzzer started 2023/06/19 16:37:44 dialing manager at localhost:44161 2023/06/19 16:37:44 checking machine... 2023/06/19 16:37:44 checking revisions... [ 33.638271] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:37:44 testing simple program... [ 33.683576] cgroup: Unknown subsys name 'net' [ 33.759043] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:37:37 Registers: info registers vcpu 0 RAX=ffffffff863b0c6f RBX=0000000000000001 RCX=ffffffff863b0c6a RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =ffffffff863b0c6e R9 =ffff88806ce09ad8 R10=0000000000038001 R11=000000000008a6be R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88806ce09ad9 R15=ffff88806ce09a98 RIP=ffffffff81130abf RFL=00000246 [---Z-P-] 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 00007f67eeec1900 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=00007ffd1acfd000 CR3=000000001cdce000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff 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=00007f6a5f9291e0 CR3=0000000008f76000 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=2033343a37333a3631203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033343a37333a3631203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000