[ 30.418406] BUG: Bad rss-counter state mm:00000000c78ff3aa type:MM_FILEPAGES val:33 [ 30.419816] BUG: Bad rss-counter state mm:00000000c78ff3aa type:MM_ANONPAGES val:22 [ 30.590980] ================================================================== [ 30.591945] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.592945] Read of size 8 at addr ffff88801a7fb5c8 by task sshd/220 [ 30.593768] [ 30.594004] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.595151] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.596191] Call Trace: [ 30.596525] [ 30.596833] dump_stack_lvl+0x91/0xf0 [ 30.597513] print_report+0xcc/0x620 [ 30.598141] ? __virt_addr_valid+0x102/0x340 [ 30.598856] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.599622] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.600370] kasan_report+0xbe/0xf0 [ 30.600952] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.601715] vma_interval_tree_remove+0xc75/0xec0 [ 30.602456] vma_prepare+0xc54/0x11a0 [ 30.603054] __split_vma+0x5af/0x950 [ 30.603623] ? __pfx___split_vma+0x10/0x10 [ 30.604278] ? find_held_lock+0x2c/0x110 [ 30.604912] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.605602] ? lock_is_held_type+0x9f/0x120 [ 30.606288] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.606990] ? mtree_range_walk+0x632/0x900 [ 30.607538] ? mas_walk+0x5c7/0x7c0 [ 30.608014] do_vmi_munmap+0x1f1/0x2b0 [ 30.608519] mmap_region+0x1f9/0x2660 [ 30.609001] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.609525] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.610259] ? __pfx_lock_acquire+0x10/0x10 [ 30.610797] ? __pfx_mmap_region+0x10/0x10 [ 30.611347] ? security_mmap_addr+0x7d/0xa0 [ 30.611886] ? get_unmapped_area+0x1f5/0x3f0 [ 30.612452] do_mmap+0x854/0xf00 [ 30.612900] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.613390] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.613963] ksys_mmap_pgoff+0x3af/0x500 [ 30.614487] do_syscall_64+0x3f/0x90 [ 30.614986] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.615648] RIP: 0033:0x7f3f86b61d82 [ 30.616114] 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 [ 30.618308] RSP: 002b:00007ffef50bb308 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.619230] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3f86b61d82 [ 30.620090] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3f85f9b000 [ 30.620931] RBP: 00007f3f85f9b000 R08: 0000000000000009 R09: 0000000000001000 [ 30.621789] R10: 0000000000000812 R11: 0000000000000206 R12: 000055be5dba0ec0 [ 30.622660] R13: 00007ffef50bb320 R14: 00007ffef50bb350 R15: 00007ffef50bb6b0 [ 30.623523] [ 30.623817] [ 30.624038] Allocated by task 208: [ 30.624468] kasan_save_stack+0x22/0x50 [ 30.624973] kasan_set_track+0x25/0x30 [ 30.625478] __kasan_slab_alloc+0x59/0x70 [ 30.626000] kmem_cache_alloc+0x16b/0x370 [ 30.626530] vm_area_dup+0x20/0x160 [ 30.626983] __split_vma+0x170/0x950 [ 30.627455] split_vma+0xc6/0x110 [ 30.627905] mprotect_fixup+0x8d2/0xb30 [ 30.628419] do_mprotect_pkey+0x87e/0xd40 [ 30.628947] __x64_sys_mprotect+0x78/0xc0 [ 30.629474] do_syscall_64+0x3f/0x90 [ 30.629954] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.630626] [ 30.630849] Freed by task 212: [ 30.631252] kasan_save_stack+0x22/0x50 [ 30.631762] kasan_set_track+0x25/0x30 [ 30.632269] kasan_save_free_info+0x2b/0x50 [ 30.632817] __kasan_slab_free+0x10a/0x190 [ 30.633367] kmem_cache_free+0x10d/0x4d0 [ 30.633888] rcu_core+0x8c8/0x2860 [ 30.634342] __do_softirq+0x1b7/0x7d4 [ 30.634820] [ 30.635042] Last potentially related work creation: [ 30.635630] kasan_save_stack+0x22/0x50 [ 30.636227] __kasan_record_aux_stack+0x8e/0xa0 [ 30.636823] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.637481] remove_vma+0x139/0x170 [ 30.637934] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.638529] do_vmi_munmap+0x1f1/0x2b0 [ 30.639021] __vm_munmap+0x138/0x3a0 [ 30.639486] __x64_sys_munmap+0x59/0x80 [ 30.639984] do_syscall_64+0x3f/0x90 [ 30.640466] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.641106] [ 30.641327] The buggy address belongs to the object at ffff88801a7fb570 [ 30.641327] which belongs to the cache vm_area_struct of size 168 [ 30.642820] The buggy address is located 88 bytes inside of [ 30.642820] freed 168-byte region [ffff88801a7fb570, ffff88801a7fb618) [ 30.644242] [ 30.644461] The buggy address belongs to the physical page: [ 30.645141] page:00000000994bc5f4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a7fb [ 30.646270] memcg:ffff88801a7e7401 [ 30.646709] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.647359] page_type: 0xffffffff() [ 30.647823] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 30.648755] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a7e7401 [ 30.649683] page dumped because: kasan: bad access detected [ 30.650368] [ 30.650584] Memory state around the buggy address: [ 30.651164] ffff88801a7fb480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.652033] ffff88801a7fb500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 30.652901] >ffff88801a7fb580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.653772] ^ [ 30.654466] ffff88801a7fb600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.655353] ffff88801a7fb680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.656214] ================================================================== [ 30.657349] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 32.801512] BUG: Bad rss-counter state mm:0000000091cd258c type:MM_FILEPAGES val:33 [ 32.802674] BUG: Bad rss-counter state mm:0000000091cd258c type:MM_ANONPAGES val:22 [ 33.158529] BUG: Bad rss-counter state mm:00000000e645db34 type:MM_FILEPAGES val:33 [ 33.159475] BUG: Bad rss-counter state mm:00000000e645db34 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:23768' (ECDSA) to the list of known hosts. 2023/06/19 16:34:02 fuzzer started 2023/06/19 16:34:03 dialing manager at localhost:44161 2023/06/19 16:34:03 checking machine... 2023/06/19 16:34:03 checking revisions... [ 33.890439] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:34:03 testing simple program... [ 33.947863] cgroup: Unknown subsys name 'net' [ 34.038170] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:33:56 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff888016c99b40 RSI=ffffffff83ab421f RDI=ffffffff8560b640 RBP=0000000000000000 RSP=ffff88800ca8f440 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000b3500000b35 R12=ffffffff8560b640 R13=ffffffff83ab421f R14=dffffc0000000000 R15=ffffffff87f94640 RIP=ffffffff812d862e RFL=00000282 [--S----] 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 00007f8f38fab900 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=00007ffe3e161000 CR3=000000001c9c2000 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=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=00007fe2633a1610 CR3=000000000ee80000 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=00000000000000000000000000000000 XMM01=32a42cb626400b93e5461ccab3c69b95 XMM02=000000000011d460eff9b2d0a8fce9cb XMM03=000000000011d5302c67c8bc2e329bc3 XMM04=c1d6fea5da2ee2d500000000000ae988 XMM05=19e9129bd510f2350000000000133050 XMM06=45516aadb9847ea40000000000132228 XMM07=e042d86d42eb936e0000000000122cf8 XMM08=d6df70d2781ba8cd000000000011d530 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000