[ 37.913669] BUG: Bad rss-counter state mm:00000000d899bba7 type:MM_FILEPAGES val:33 [ 37.914911] BUG: Bad rss-counter state mm:00000000d899bba7 type:MM_ANONPAGES val:22 [ 38.066991] ================================================================== [ 38.068094] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.069198] Read of size 8 at addr ffff888019f2edf0 by task sshd/220 [ 38.070262] [ 38.070500] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 38.071436] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.072519] Call Trace: [ 38.072859] [ 38.073167] dump_stack_lvl+0x91/0xf0 [ 38.073702] print_report+0xcc/0x620 [ 38.074213] ? __virt_addr_valid+0x102/0x340 [ 38.074819] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.075490] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.076150] kasan_report+0xbe/0xf0 [ 38.076661] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.077332] vma_interval_tree_remove+0xc75/0xec0 [ 38.077982] vma_prepare+0xc54/0x11a0 [ 38.078519] __split_vma+0x5af/0x950 [ 38.079018] ? __pfx___split_vma+0x10/0x10 [ 38.079579] ? find_held_lock+0x2c/0x110 [ 38.080139] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.080738] ? lock_is_held_type+0x9f/0x120 [ 38.081310] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.081956] ? mtree_range_walk+0x632/0x900 [ 38.082552] ? mas_walk+0x5c7/0x7c0 [ 38.083056] do_vmi_munmap+0x1f1/0x2b0 [ 38.083580] mmap_region+0x1f9/0x2660 [ 38.084098] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.084657] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.085416] ? __pfx_lock_acquire+0x10/0x10 [ 38.085977] ? __pfx_mmap_region+0x10/0x10 [ 38.086551] ? security_mmap_addr+0x7d/0xa0 [ 38.087121] ? get_unmapped_area+0x1f5/0x3f0 [ 38.087710] do_mmap+0x854/0xf00 [ 38.088183] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.088705] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.089315] ksys_mmap_pgoff+0x3af/0x500 [ 38.089853] do_syscall_64+0x3f/0x90 [ 38.090381] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.091066] RIP: 0033:0x7f9d943ecd82 [ 38.091552] 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 [ 38.093835] RSP: 002b:00007ffc52c0e678 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.094796] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9d943ecd82 [ 38.095708] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9d93826000 [ 38.096609] RBP: 00007f9d93826000 R08: 0000000000000009 R09: 0000000000001000 [ 38.097505] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557c14588ec0 [ 38.098424] R13: 00007ffc52c0e690 R14: 00007ffc52c0e6c0 R15: 00007ffc52c0ea20 [ 38.099333] [ 38.099644] [ 38.099871] Allocated by task 209: [ 38.100328] kasan_save_stack+0x22/0x50 [ 38.100869] kasan_set_track+0x25/0x30 [ 38.101406] __kasan_slab_alloc+0x59/0x70 [ 38.101970] kmem_cache_alloc+0x16b/0x370 [ 38.102522] vm_area_dup+0x20/0x160 [ 38.103009] __split_vma+0x170/0x950 [ 38.103502] split_vma+0xc6/0x110 [ 38.103985] mprotect_fixup+0x8d2/0xb30 [ 38.104530] do_mprotect_pkey+0x87e/0xd40 [ 38.105084] __x64_sys_mprotect+0x78/0xc0 [ 38.105641] do_syscall_64+0x3f/0x90 [ 38.106142] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.106835] [ 38.107063] Freed by task 209: [ 38.107480] kasan_save_stack+0x22/0x50 [ 38.108022] kasan_set_track+0x25/0x30 [ 38.108552] kasan_save_free_info+0x2b/0x50 [ 38.109117] __kasan_slab_free+0x10a/0x190 [ 38.109702] kmem_cache_free+0x10d/0x4d0 [ 38.110258] rcu_core+0x8c8/0x2860 [ 38.110797] __do_softirq+0x1b7/0x7d4 [ 38.111311] [ 38.111538] Last potentially related work creation: [ 38.112159] kasan_save_stack+0x22/0x50 [ 38.112700] __kasan_record_aux_stack+0x8e/0xa0 [ 38.113308] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.113992] remove_vma+0x139/0x170 [ 38.114489] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.115089] do_vmi_munmap+0x1f1/0x2b0 [ 38.115608] __vm_munmap+0x138/0x3a0 [ 38.116108] __x64_sys_munmap+0x59/0x80 [ 38.116639] do_syscall_64+0x3f/0x90 [ 38.117144] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.117828] [ 38.118058] The buggy address belongs to the object at ffff888019f2ed98 [ 38.118058] which belongs to the cache vm_area_struct of size 168 [ 38.119630] The buggy address is located 88 bytes inside of [ 38.119630] freed 168-byte region [ffff888019f2ed98, ffff888019f2ee40) [ 38.121165] [ 38.121399] The buggy address belongs to the physical page: [ 38.122109] page:00000000d8dce659 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19f2e [ 38.123232] memcg:ffff888019eedf01 [ 38.123695] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.124395] page_type: 0xffffffff() [ 38.124883] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 38.125873] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019eedf01 [ 38.126829] page dumped because: kasan: bad access detected [ 38.127519] [ 38.127756] Memory state around the buggy address: [ 38.128380] ffff888019f2ec80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 38.129305] ffff888019f2ed00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 38.130240] >ffff888019f2ed80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 38.131098] ^ [ 38.131980] ffff888019f2ee00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 38.132916] ffff888019f2ee80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.133795] ================================================================== [ 38.134824] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 40.038880] BUG: Bad rss-counter state mm:00000000f9f442aa type:MM_FILEPAGES val:33 [ 40.039864] BUG: Bad rss-counter state mm:00000000f9f442aa type:MM_ANONPAGES val:22 [ 40.507322] BUG: Bad rss-counter state mm:0000000099ce4e83 type:MM_FILEPAGES val:33 [ 40.508994] BUG: Bad rss-counter state mm:0000000099ce4e83 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:17125' (ECDSA) to the list of known hosts. 2023/06/19 12:30:49 fuzzer started 2023/06/19 12:30:50 dialing manager at localhost:44161 2023/06/19 12:30:50 checking machine... 2023/06/19 12:30:50 checking revisions... [ 41.252996] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:30:50 testing simple program... [ 41.297931] cgroup: Unknown subsys name 'net' [ 41.333573] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:30:35 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff888015c50000 RSI=ffffffff814c84fa RDI=0000000000000005 RBP=0000000000000000 RSP=ffff88800fbd7a20 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85652988 R15=dffffc0000000000 RIP=ffffffff81374466 RFL=00000293 [--S-A-C] 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 00007fb65d69f900 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=00007ffc40798000 CR3=000000000b36a000 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=0000000000000000ffff000000000000 XMM02=2f00646f6874656d5f74707972636e65 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ff00ffffffffffffffffffffffffffff XMM08=20002020202020200020202020202020 XMM09=0000ffffffffffffffffffffffffffff XMM10=00002020202020200020202020202020 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=ffff888008c58400 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=00007f197c2e8150 CR3=000000000e544000 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=2039343a30333a3231203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039343a30333a3231203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000