[ 31.448073] BUG: Bad rss-counter state mm:0000000062466699 type:MM_FILEPAGES val:33 [ 31.449261] BUG: Bad rss-counter state mm:0000000062466699 type:MM_ANONPAGES val:22 [ 31.607319] ================================================================== [ 31.608189] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.609104] Read of size 8 at addr ffff88800e8a9228 by task sshd/220 [ 31.609854] [ 31.610070] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.610973] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.611917] Call Trace: [ 31.612232] [ 31.612511] dump_stack_lvl+0x91/0xf0 [ 31.613014] print_report+0xcc/0x620 [ 31.613485] ? __virt_addr_valid+0x102/0x340 [ 31.614022] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.614622] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.615225] kasan_report+0xbe/0xf0 [ 31.615686] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.616424] vma_interval_tree_remove+0xc75/0xec0 [ 31.617035] vma_prepare+0xc54/0x11a0 [ 31.617516] __split_vma+0x5af/0x950 [ 31.617986] ? __pfx___split_vma+0x10/0x10 [ 31.618522] ? find_held_lock+0x2c/0x110 [ 31.619047] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.619628] ? lock_is_held_type+0x9f/0x120 [ 31.620169] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.620776] ? mtree_range_walk+0x632/0x900 [ 31.621337] ? mas_walk+0x5c7/0x7c0 [ 31.621820] do_vmi_munmap+0x1f1/0x2b0 [ 31.622310] mmap_region+0x1f9/0x2660 [ 31.622792] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.623301] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.624025] ? __pfx_lock_acquire+0x10/0x10 [ 31.624562] ? __pfx_mmap_region+0x10/0x10 [ 31.625113] ? security_mmap_addr+0x7d/0xa0 [ 31.625648] ? get_unmapped_area+0x1f5/0x3f0 [ 31.626204] do_mmap+0x854/0xf00 [ 31.626646] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.627146] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.627709] ksys_mmap_pgoff+0x3af/0x500 [ 31.628224] do_syscall_64+0x3f/0x90 [ 31.628701] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.629358] RIP: 0033:0x7f4c48534d82 [ 31.629814] 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 [ 31.631889] RSP: 002b:00007ffeb5bace28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.632792] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4c48534d82 [ 31.633633] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4c4796e000 [ 31.634459] RBP: 00007f4c4796e000 R08: 0000000000000009 R09: 0000000000001000 [ 31.635283] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560f8a473f70 [ 31.636105] R13: 00007ffeb5bace40 R14: 00007ffeb5bace70 R15: 00007ffeb5bad1d0 [ 31.636942] [ 31.637232] [ 31.637444] Allocated by task 213: [ 31.637859] kasan_save_stack+0x22/0x50 [ 31.638351] kasan_set_track+0x25/0x30 [ 31.638833] __kasan_slab_alloc+0x59/0x70 [ 31.639343] kmem_cache_alloc+0x16b/0x370 [ 31.639850] vm_area_dup+0x20/0x160 [ 31.640292] __split_vma+0x170/0x950 [ 31.640746] split_vma+0xc6/0x110 [ 31.641211] mprotect_fixup+0x8d2/0xb30 [ 31.641709] do_mprotect_pkey+0x87e/0xd40 [ 31.642216] __x64_sys_mprotect+0x78/0xc0 [ 31.642725] do_syscall_64+0x3f/0x90 [ 31.643197] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.643830] [ 31.644040] Freed by task 213: [ 31.644426] kasan_save_stack+0x22/0x50 [ 31.644923] kasan_set_track+0x25/0x30 [ 31.645412] kasan_save_free_info+0x2b/0x50 [ 31.645932] __kasan_slab_free+0x10a/0x190 [ 31.646450] kmem_cache_free+0x10d/0x4d0 [ 31.646959] rcu_core+0x8c8/0x2860 [ 31.647397] __do_softirq+0x1b7/0x7d4 [ 31.647866] [ 31.648079] Last potentially related work creation: [ 31.648650] kasan_save_stack+0x22/0x50 [ 31.649159] __kasan_record_aux_stack+0x8e/0xa0 [ 31.649715] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.650347] remove_vma+0x139/0x170 [ 31.650784] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.651330] do_vmi_munmap+0x1f1/0x2b0 [ 31.651803] __vm_munmap+0x138/0x3a0 [ 31.652257] __x64_sys_munmap+0x59/0x80 [ 31.652743] do_syscall_64+0x3f/0x90 [ 31.653220] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.653846] [ 31.654058] Second to last potentially related work creation: [ 31.654722] kasan_save_stack+0x22/0x50 [ 31.655214] __kasan_record_aux_stack+0x8e/0xa0 [ 31.655771] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.656396] remove_vma+0x139/0x170 [ 31.656834] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.657387] do_vmi_munmap+0x1f1/0x2b0 [ 31.657860] mmap_region+0x1f9/0x2660 [ 31.658323] do_mmap+0x854/0xf00 [ 31.658741] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.659218] ksys_mmap_pgoff+0x3af/0x500 [ 31.659703] do_syscall_64+0x3f/0x90 [ 31.660164] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.660791] [ 31.661015] The buggy address belongs to the object at ffff88800e8a91d0 [ 31.661015] which belongs to the cache vm_area_struct of size 168 [ 31.662442] The buggy address is located 88 bytes inside of [ 31.662442] freed 168-byte region [ffff88800e8a91d0, ffff88800e8a9278) [ 31.663806] [ 31.664018] The buggy address belongs to the physical page: [ 31.664655] page:0000000078bb3853 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe8a9 [ 31.665705] memcg:ffff88800d53ed01 [ 31.666123] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.666748] page_type: 0xffffffff() [ 31.667191] raw: 0100000000000200 ffff8880087a0c80 ffffea0000371900 dead000000000008 [ 31.668077] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d53ed01 [ 31.668956] page dumped because: kasan: bad access detected [ 31.669621] [ 31.669831] Memory state around the buggy address: [ 31.670402] ffff88800e8a9100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.671235] ffff88800e8a9180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.672070] >ffff88800e8a9200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.672900] ^ [ 31.673446] ffff88800e8a9280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 31.674273] ffff88800e8a9300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 31.675099] ================================================================== [ 31.676040] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 33.600810] BUG: Bad rss-counter state mm:00000000560c4b81 type:MM_FILEPAGES val:33 [ 33.602030] BUG: Bad rss-counter state mm:00000000560c4b81 type:MM_ANONPAGES val:22 [ 34.061979] BUG: Bad rss-counter state mm:00000000e4e3df73 type:MM_FILEPAGES val:33 [ 34.063162] BUG: Bad rss-counter state mm:00000000e4e3df73 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38525' (ECDSA) to the list of known hosts. 2023/06/20 22:52:11 fuzzer started 2023/06/20 22:52:11 dialing manager at localhost:36067 2023/06/20 22:52:11 checking machine... 2023/06/20 22:52:11 checking revisions... [ 34.700870] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:52:11 testing simple program... [ 34.745897] cgroup: Unknown subsys name 'net' [ 34.794642] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:52:11 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff815343f6 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffffffff8180636b RSP=ffff88801432f880 R8 =00000000800d000c R9 =0000000000000000 R10=ffffea0000318e00 R11=00000000000d000c R12=ffff88800844f780 R13=ffffea0000318e00 R14=ffff88800844f780 R15=0000000000000001 RIP=ffffffff8180feac RFL=00000046 [---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 00007fadc16b6900 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=0000563549c0e768 CR3=000000000c6ac000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=fd92cf0c44e2247200000000000ae988 XMM05=e9f420947cdbaa680000000000133f20 XMM06=19e9129bd510f2350000000000132cf8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000007 RBX=0000000000000001 RCX=ffffffff81b4bb00 RDX=000000000000b4bb RSI=000000000000b4bb RDI=ffffffff86516cdc RBP=ffff888018097510 RSP=ffff888018097448 R8 =0000000000000000 R9 =ffff8880180974f8 R10=0000000000038001 R11=000000000002c9f6 R12=ffff888018097518 R13=ffff888018097500 R14=ffff8880180974f9 R15=ffff8880180974b8 RIP=ffffffff811307c2 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 00007f1d9ee0c700 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=00007f443c2a70b0 CR3=000000000efe4000 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=2031313a32353a3232203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030313a32353a3232203032 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000