[ 31.133193] BUG: Bad rss-counter state mm:000000004ce21627 type:MM_FILEPAGES val:33 [ 31.134263] BUG: Bad rss-counter state mm:000000004ce21627 type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 31.304228] ================================================================== [ 31.305162] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.306143] Read of size 8 at addr ffff88800f27d058 by task sshd/219 [ 31.307054] [ 31.307277] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.308191] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.309200] Call Trace: [ 31.309544] [ 31.309845] dump_stack_lvl+0x91/0xf0 [ 31.310367] print_report+0xcc/0x620 [ 31.310878] ? __virt_addr_valid+0x102/0x340 [ 31.311483] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.312113] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.312766] kasan_report+0xbe/0xf0 [ 31.313252] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.313900] vma_interval_tree_remove+0xc75/0xec0 [ 31.314531] vma_prepare+0xc54/0x11a0 [ 31.315043] __split_vma+0x5af/0x950 [ 31.315550] ? __pfx___split_vma+0x10/0x10 [ 31.316093] ? find_held_lock+0x2c/0x110 [ 31.316645] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.317232] ? lock_is_held_type+0x9f/0x120 [ 31.317802] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.318441] ? mtree_range_walk+0x632/0x900 [ 31.319038] ? mas_walk+0x5c7/0x7c0 [ 31.319554] do_vmi_munmap+0x1f1/0x2b0 [ 31.320077] mmap_region+0x1f9/0x2660 [ 31.320599] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.321123] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.321875] ? __pfx_lock_acquire+0x10/0x10 [ 31.322431] ? __pfx_mmap_region+0x10/0x10 [ 31.322999] ? security_mmap_addr+0x7d/0xa0 [ 31.323568] ? get_unmapped_area+0x1f5/0x3f0 [ 31.324137] do_mmap+0x854/0xf00 [ 31.324607] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.325117] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.325702] ksys_mmap_pgoff+0x3af/0x500 [ 31.326220] do_syscall_64+0x3f/0x90 [ 31.326737] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.327442] RIP: 0033:0x7fe3f6cb4d82 [ 31.327901] 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 [ 31.330093] RSP: 002b:00007ffd8ab11948 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.331059] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe3f6cb4d82 [ 31.331968] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe3f60ee000 [ 31.332850] RBP: 00007fe3f60ee000 R08: 0000000000000009 R09: 0000000000001000 [ 31.333734] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c576004d90 [ 31.334632] R13: 00007ffd8ab11960 R14: 00007ffd8ab11990 R15: 00007ffd8ab11cf0 [ 31.335543] [ 31.335842] [ 31.336062] Allocated by task 212: [ 31.336514] kasan_save_stack+0x22/0x50 [ 31.337037] kasan_set_track+0x25/0x30 [ 31.337572] __kasan_slab_alloc+0x59/0x70 [ 31.338109] kmem_cache_alloc+0x16b/0x370 [ 31.338663] vm_area_dup+0x20/0x160 [ 31.339163] __split_vma+0x170/0x950 [ 31.339649] split_vma+0xc6/0x110 [ 31.340101] mprotect_fixup+0x8d2/0xb30 [ 31.340648] do_mprotect_pkey+0x87e/0xd40 [ 31.341186] __x64_sys_mprotect+0x78/0xc0 [ 31.341731] do_syscall_64+0x3f/0x90 [ 31.342218] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.342906] [ 31.343129] Freed by task 212: [ 31.343542] kasan_save_stack+0x22/0x50 [ 31.344065] kasan_set_track+0x25/0x30 [ 31.344594] kasan_save_free_info+0x2b/0x50 [ 31.345151] __kasan_slab_free+0x10a/0x190 [ 31.345703] kmem_cache_free+0x10d/0x4d0 [ 31.346223] rcu_core+0x8c8/0x2860 [ 31.346691] __do_softirq+0x1b7/0x7d4 [ 31.347211] [ 31.347452] Last potentially related work creation: [ 31.348053] kasan_save_stack+0x22/0x50 [ 31.348598] __kasan_record_aux_stack+0x8e/0xa0 [ 31.349193] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.349868] remove_vma+0x139/0x170 [ 31.350364] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.350951] do_vmi_munmap+0x1f1/0x2b0 [ 31.351481] __vm_munmap+0x138/0x3a0 [ 31.351960] __x64_sys_munmap+0x59/0x80 [ 31.352491] do_syscall_64+0x3f/0x90 [ 31.352981] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.353678] [ 31.353904] The buggy address belongs to the object at ffff88800f27d000 [ 31.353904] which belongs to the cache vm_area_struct of size 168 [ 31.355452] The buggy address is located 88 bytes inside of [ 31.355452] freed 168-byte region [ffff88800f27d000, ffff88800f27d0a8) [ 31.356922] [ 31.357146] The buggy address belongs to the physical page: [ 31.357840] page:000000004a1f17bc refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf27d [ 31.359020] memcg:ffff88800e043b01 [ 31.359581] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.360426] page_type: 0xffffffff() [ 31.361030] raw: 0100000000000200 ffff8880087a0c80 ffffea0000326580 dead000000000004 [ 31.362230] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e043b01 [ 31.363446] page dumped because: kasan: bad access detected [ 31.364323] [ 31.364607] Memory state around the buggy address: [ 31.365233] ffff88800f27cf00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 31.366129] ffff88800f27cf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.367033] >ffff88800f27d000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.367925] ^ [ 31.368687] ffff88800f27d080: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 [ 31.369572] ffff88800f27d100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.370461] ================================================================== [ 31.371620] Disabling lock debugging due to kernel taint [ 33.483071] BUG: Bad rss-counter state mm:000000004cff5027 type:MM_FILEPAGES val:33 [ 33.484444] BUG: Bad rss-counter state mm:000000004cff5027 type:MM_ANONPAGES val:22 [ 33.771069] BUG: Bad rss-counter state mm:000000000b1caa4e type:MM_FILEPAGES val:33 [ 33.771602] BUG: Bad rss-counter state mm:000000000b1caa4e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:34689' (ECDSA) to the list of known hosts. 2023/06/20 20:56:23 fuzzer started 2023/06/20 20:56:23 dialing manager at localhost:36067 2023/06/20 20:56:23 checking machine... 2023/06/20 20:56:23 checking revisions... [ 34.289254] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:56:23 testing simple program... [ 34.326367] cgroup: Unknown subsys name 'net' [ 34.387014] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:56:23 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=000055b78a160fe0 CR3=0000000005482000 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=00007fb18baed510000055cf2df1d790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff11002d74fba RBX=0000000000000001 RCX=0000000000000001 RDX=ffff888016ba7d01 RSI=ffff888016ba7da0 RDI=ffff888016ba7da0 RBP=ffff888016ba76a0 RSP=ffff888016ba75d8 R8 =0000000000000001 R9 =ffff888016ba7688 R10=0000000000038001 R11=0000000000023906 R12=ffff888016ba76a8 R13=ffff888016ba7690 R14=ffff888016ba7da0 R15=ffff888016ba7648 RIP=ffffffff81131236 RFL=00000202 [-------] 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 00007fc3445a0900 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=00007f1471383650 CR3=0000000013a8a000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=735e453fdd9e30fb00000000000ae988 XMM05=93a1b62fee0f42fb0000000000132f98 XMM06=dfcdbad4f1609c370000000000131ac0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000