[ 31.486356] BUG: Bad rss-counter state mm:00000000b9ce7a72 type:MM_FILEPAGES val:33 [ 31.487789] BUG: Bad rss-counter state mm:00000000b9ce7a72 type:MM_ANONPAGES val:22 [ 31.633467] ================================================================== [ 31.634510] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.635460] Read of size 8 at addr ffff88800dbed310 by task sshd/220 [ 31.636301] [ 31.636519] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.637395] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.638398] Call Trace: [ 31.638720] [ 31.639009] dump_stack_lvl+0x91/0xf0 [ 31.639506] print_report+0xcc/0x620 [ 31.639991] ? __virt_addr_valid+0x102/0x340 [ 31.640548] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.641171] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.641818] kasan_report+0xbe/0xf0 [ 31.642301] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.642928] vma_interval_tree_remove+0xc75/0xec0 [ 31.643538] vma_prepare+0xc54/0x11a0 [ 31.644017] __split_vma+0x5af/0x950 [ 31.644501] ? __pfx___split_vma+0x10/0x10 [ 31.645043] ? find_held_lock+0x2c/0x110 [ 31.645579] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.646149] ? lock_is_held_type+0x9f/0x120 [ 31.646699] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.647317] ? mtree_range_walk+0x632/0x900 [ 31.647877] ? mas_walk+0x5c7/0x7c0 [ 31.648358] do_vmi_munmap+0x1f1/0x2b0 [ 31.648860] mmap_region+0x1f9/0x2660 [ 31.649346] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.649870] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.650584] ? __pfx_lock_acquire+0x10/0x10 [ 31.651121] ? __pfx_mmap_region+0x10/0x10 [ 31.651662] ? security_mmap_addr+0x7d/0xa0 [ 31.652193] ? get_unmapped_area+0x1f5/0x3f0 [ 31.652748] do_mmap+0x854/0xf00 [ 31.653192] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.653715] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.654283] ksys_mmap_pgoff+0x3af/0x500 [ 31.654790] do_syscall_64+0x3f/0x90 [ 31.655276] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.655921] RIP: 0033:0x7f4fc4df8d82 [ 31.656378] 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 [ 31.658508] RSP: 002b:00007ffe5bbd5e28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.659422] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4fc4df8d82 [ 31.660276] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4fc4232000 [ 31.661126] RBP: 00007f4fc4232000 R08: 0000000000000009 R09: 0000000000001000 [ 31.661993] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557968fb0ec0 [ 31.662846] R13: 00007ffe5bbd5e40 R14: 00007ffe5bbd5e70 R15: 00007ffe5bbd61d0 [ 31.663713] [ 31.664009] [ 31.664230] Allocated by task 213: [ 31.664660] kasan_save_stack+0x22/0x50 [ 31.665170] kasan_set_track+0x25/0x30 [ 31.665680] __kasan_slab_alloc+0x59/0x70 [ 31.666209] kmem_cache_alloc+0x16b/0x370 [ 31.666734] vm_area_dup+0x20/0x160 [ 31.667200] __split_vma+0x170/0x950 [ 31.667673] split_vma+0xc6/0x110 [ 31.668124] mprotect_fixup+0x8d2/0xb30 [ 31.668634] do_mprotect_pkey+0x87e/0xd40 [ 31.669160] __x64_sys_mprotect+0x78/0xc0 [ 31.669704] do_syscall_64+0x3f/0x90 [ 31.670179] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.670833] [ 31.671047] Freed by task 19: [ 31.671437] kasan_save_stack+0x22/0x50 [ 31.671943] kasan_set_track+0x25/0x30 [ 31.672437] kasan_save_free_info+0x2b/0x50 [ 31.672968] __kasan_slab_free+0x10a/0x190 [ 31.673514] kmem_cache_free+0x10d/0x4d0 [ 31.674026] rcu_core+0x8c8/0x2860 [ 31.674472] __do_softirq+0x1b7/0x7d4 [ 31.674954] [ 31.675177] Last potentially related work creation: [ 31.675764] kasan_save_stack+0x22/0x50 [ 31.676284] __kasan_record_aux_stack+0x8e/0xa0 [ 31.676855] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.677508] remove_vma+0x139/0x170 [ 31.677973] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.678536] do_vmi_munmap+0x1f1/0x2b0 [ 31.679019] __vm_munmap+0x138/0x3a0 [ 31.679493] __x64_sys_munmap+0x59/0x80 [ 31.679992] do_syscall_64+0x3f/0x90 [ 31.680469] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.681114] [ 31.681328] The buggy address belongs to the object at ffff88800dbed2b8 [ 31.681328] which belongs to the cache vm_area_struct of size 168 [ 31.682811] The buggy address is located 88 bytes inside of [ 31.682811] freed 168-byte region [ffff88800dbed2b8, ffff88800dbed360) [ 31.684211] [ 31.684431] The buggy address belongs to the physical page: [ 31.685093] page:00000000cc638e47 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdbed [ 31.686222] memcg:ffff88800ebd4001 [ 31.686658] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.687314] page_type: 0xffffffff() [ 31.687782] raw: 0100000000000200 ffff88800879fc80 ffffea00002739c0 dead000000000008 [ 31.688723] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ebd4001 [ 31.689664] page dumped because: kasan: bad access detected [ 31.690330] [ 31.690552] Memory state around the buggy address: [ 31.691137] ffff88800dbed200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 31.691996] ffff88800dbed280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.692853] >ffff88800dbed300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.693717] ^ [ 31.694184] ffff88800dbed380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.695048] ffff88800dbed400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.695906] ================================================================== [ 31.696884] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 33.782405] BUG: Bad rss-counter state mm:00000000ff088e83 type:MM_FILEPAGES val:33 [ 33.783401] BUG: Bad rss-counter state mm:00000000ff088e83 type:MM_ANONPAGES val:22 [ 34.241521] BUG: Bad rss-counter state mm:0000000050752b6b type:MM_FILEPAGES val:33 [ 34.242551] BUG: Bad rss-counter state mm:0000000050752b6b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:12623' (ECDSA) to the list of known hosts. 2023/06/20 01:01:13 fuzzer started 2023/06/20 01:01:13 dialing manager at localhost:44161 2023/06/20 01:01:13 checking machine... 2023/06/20 01:01:13 checking revisions... [ 34.946615] kmemleak: Automatic memory scanning thread ended 2023/06/20 01:01:13 testing simple program... [ 34.992906] cgroup: Unknown subsys name 'net' [ 35.034308] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:01:12 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007ffd1e025ff8 CR3=00000000096ca000 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=1566b792096a949b810c0e86519e08d9 XMM02=0242be1cbbd31f937c3025fdfe0b4f23 XMM03=8ef7ce9dce20f0b2f3e71b7d21016e67 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=0e0d0c0f0a09080b0605040702010003 XMM08=01000000000000000000000000000001 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000007 RBX=0000000000000002 RCX=ffffffff8180c521 RDX=00000000000080c5 RSI=00000000000080c5 RDI=ffffffff86507ed4 RBP=ffff88806cf09a98 RSP=ffff88806cf099d0 R8 =0000000000000000 R9 =ffff88806cf09a80 R10=0000000000038001 R11=0000000000020d8a R12=ffff88806cf09aa0 R13=ffff88806cf09a88 R14=ffff88806cf09a81 R15=ffff88806cf09a40 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 00007f1cf5385900 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=00007ffd1e024000 CR3=00000000096ca000 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=2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c XMM01=00ff00000000000000000000000000ff XMM02=00ff00000000000000000000000000ff XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=6500273d2720676e6974636570786500 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000