[ 23.990873] BUG: Bad rss-counter state mm:00000000dbf8d4a6 type:MM_FILEPAGES val:33 [ 23.991664] BUG: Bad rss-counter state mm:00000000dbf8d4a6 type:MM_ANONPAGES val:22 [ 24.096052] ================================================================== [ 24.096741] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.097487] Read of size 8 at addr ffff88800f222a50 by task sshd/219 [ 24.098075] [ 24.098246] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.098934] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.099635] Call Trace: [ 24.099812] [ 24.099971] dump_stack_lvl+0x91/0xf0 [ 24.100244] print_report+0xcc/0x620 [ 24.100512] ? __virt_addr_valid+0x102/0x340 [ 24.100920] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.101386] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.101737] kasan_report+0xbe/0xf0 [ 24.101998] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.102337] vma_interval_tree_remove+0xc75/0xec0 [ 24.102667] vma_prepare+0xc54/0x11a0 [ 24.102936] __split_vma+0x5af/0x950 [ 24.103199] ? __pfx___split_vma+0x10/0x10 [ 24.103509] ? find_held_lock+0x2c/0x110 [ 24.103802] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.104114] ? lock_is_held_type+0x9f/0x120 [ 24.104411] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.104754] ? mtree_range_walk+0x632/0x900 [ 24.105058] ? mas_walk+0x5c7/0x7c0 [ 24.105317] do_vmi_munmap+0x1f1/0x2b0 [ 24.105595] mmap_region+0x1f9/0x2660 [ 24.105872] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.106175] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.106598] ? __pfx_lock_acquire+0x10/0x10 [ 24.106926] ? __pfx_mmap_region+0x10/0x10 [ 24.107234] ? security_mmap_addr+0x7d/0xa0 [ 24.107549] ? get_unmapped_area+0x1f5/0x3f0 [ 24.107872] do_mmap+0x854/0xf00 [ 24.108131] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.108417] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.108756] ksys_mmap_pgoff+0x3af/0x500 [ 24.109049] do_syscall_64+0x3f/0x90 [ 24.109327] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.109701] RIP: 0033:0x7fb2437c9d82 [ 24.109966] 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 [ 24.111192] RSP: 002b:00007fffc1265f68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.111715] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb2437c9d82 [ 24.112205] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb242c03000 [ 24.112698] RBP: 00007fb242c03000 R08: 0000000000000009 R09: 0000000000001000 [ 24.113185] R10: 0000000000000812 R11: 0000000000000206 R12: 00005593f532bb20 [ 24.113669] R13: 00007fffc1265f80 R14: 00007fffc1265fb0 R15: 00007fffc1266310 [ 24.114168] [ 24.114338] [ 24.114460] Allocated by task 212: [ 24.114703] kasan_save_stack+0x22/0x50 [ 24.114997] kasan_set_track+0x25/0x30 [ 24.115277] __kasan_slab_alloc+0x59/0x70 [ 24.115575] kmem_cache_alloc+0x16b/0x370 [ 24.115868] vm_area_dup+0x20/0x160 [ 24.116119] __split_vma+0x170/0x950 [ 24.116388] split_vma+0xc6/0x110 [ 24.116635] mprotect_fixup+0x8d2/0xb30 [ 24.116929] do_mprotect_pkey+0x87e/0xd40 [ 24.117227] __x64_sys_mprotect+0x78/0xc0 [ 24.117522] do_syscall_64+0x3f/0x90 [ 24.117803] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.118178] [ 24.118303] Freed by task 19: [ 24.118527] kasan_save_stack+0x22/0x50 [ 24.118830] kasan_set_track+0x25/0x30 [ 24.119117] kasan_save_free_info+0x2b/0x50 [ 24.119421] __kasan_slab_free+0x10a/0x190 [ 24.119734] kmem_cache_free+0x10d/0x4d0 [ 24.120028] rcu_core+0x8c8/0x2860 [ 24.120286] __do_softirq+0x1b7/0x7d4 [ 24.120565] [ 24.120687] Last potentially related work creation: [ 24.121021] kasan_save_stack+0x22/0x50 [ 24.121309] __kasan_record_aux_stack+0x8e/0xa0 [ 24.121633] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.121995] remove_vma+0x139/0x170 [ 24.122251] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.122582] do_vmi_munmap+0x1f1/0x2b0 [ 24.122863] __vm_munmap+0x138/0x3a0 [ 24.123129] __x64_sys_munmap+0x59/0x80 [ 24.123415] do_syscall_64+0x3f/0x90 [ 24.123694] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.124061] [ 24.124182] The buggy address belongs to the object at ffff88800f2229f8 [ 24.124182] which belongs to the cache vm_area_struct of size 168 [ 24.125028] The buggy address is located 88 bytes inside of [ 24.125028] freed 168-byte region [ffff88800f2229f8, ffff88800f222aa0) [ 24.125822] [ 24.125942] The buggy address belongs to the physical page: [ 24.126320] page:00000000eac43864 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf222 [ 24.127014] memcg:ffff88800daca101 [ 24.127258] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 24.127657] page_type: 0xffffffff() [ 24.127915] raw: 0100000000000200 ffff8880087a0c80 ffffea000036ae00 0000000000000005 [ 24.128438] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800daca101 [ 24.128962] page dumped because: kasan: bad access detected [ 24.129342] [ 24.129463] Memory state around the buggy address: [ 24.129800] ffff88800f222900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.130284] ffff88800f222980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 24.130789] >ffff88800f222a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.131276] ^ [ 24.131671] ffff88800f222a80: fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 [ 24.132167] ffff88800f222b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.132655] ================================================================== [ 24.133168] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.031333] BUG: Bad rss-counter state mm:00000000681380c2 type:MM_FILEPAGES val:33 [ 26.032100] BUG: Bad rss-counter state mm:00000000681380c2 type:MM_ANONPAGES val:22 [ 26.484447] BUG: Bad rss-counter state mm:000000006f4d739c type:MM_FILEPAGES val:33 [ 26.485218] BUG: Bad rss-counter state mm:000000006f4d739c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:28097' (ECDSA) to the list of known hosts. 2023/06/21 07:56:38 fuzzer started 2023/06/21 07:56:38 dialing manager at localhost:36067 2023/06/21 07:56:38 checking machine... 2023/06/21 07:56:38 checking revisions... [ 27.152299] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:56:38 testing simple program... [ 27.192934] cgroup: Unknown subsys name 'net' [ 27.241861] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:56:37 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88801584fd90 RCX=ffffffff8162148b RDX=ffff888016b41b40 RSI=0000000000000008 RDI=ffffea000061d0c0 RBP=ffffea000061d0c0 RSP=ffff88801584fba0 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6d53 R12=ffff888016625e00 R13=00000000165b9400 R14=ffff88800e234828 R15=0000000000000001 RIP=ffffffff8180fea8 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f2784cbc900 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=00007f27840b7410 CR3=000000000d49c000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=ddf5a99421a667aa00000000000ae988 XMM05=b5081603a97adf4000000000001325b0 XMM06=806171799158d9670000000000131030 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 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=000055b3c22d4b40 CR3=000000000c510000 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=2037333a36353a3730203132206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037333a36353a3730203132 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000