[ 23.874723] BUG: Bad rss-counter state mm:000000009b1139e8 type:MM_FILEPAGES val:33 [ 23.875732] BUG: Bad rss-counter state mm:000000009b1139e8 type:MM_ANONPAGES val:22 [ 24.033777] ================================================================== [ 24.034871] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.036014] Read of size 8 at addr ffff888009676968 by task sshd/219 [ 24.037085] [ 24.037376] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.038360] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.039341] Call Trace: [ 24.039662] [ 24.039950] dump_stack_lvl+0x91/0xf0 [ 24.040448] print_report+0xcc/0x620 [ 24.040928] ? __virt_addr_valid+0x102/0x340 [ 24.041495] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.042109] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.042716] kasan_report+0xbe/0xf0 [ 24.043194] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.043812] vma_interval_tree_remove+0xc75/0xec0 [ 24.044410] vma_prepare+0xc54/0x11a0 [ 24.044891] __split_vma+0x5af/0x950 [ 24.045382] ? __pfx___split_vma+0x10/0x10 [ 24.045903] ? find_held_lock+0x2c/0x110 [ 24.046428] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.046993] ? lock_is_held_type+0x9f/0x120 [ 24.047530] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.048128] ? mtree_range_walk+0x632/0x900 [ 24.048680] ? mas_walk+0x5c7/0x7c0 [ 24.049158] do_vmi_munmap+0x1f1/0x2b0 [ 24.049664] mmap_region+0x1f9/0x2660 [ 24.050143] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.050665] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.051383] ? __pfx_lock_acquire+0x10/0x10 [ 24.051913] ? __pfx_mmap_region+0x10/0x10 [ 24.052444] ? security_mmap_addr+0x7d/0xa0 [ 24.052975] ? get_unmapped_area+0x1f5/0x3f0 [ 24.053531] do_mmap+0x854/0xf00 [ 24.053969] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.054470] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.055031] ksys_mmap_pgoff+0x3af/0x500 [ 24.055546] do_syscall_64+0x3f/0x90 [ 24.056035] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.056682] RIP: 0033:0x7f66a8d45d82 [ 24.057133] 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 [ 24.059306] RSP: 002b:00007fff065b6b78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.060211] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f66a8d45d82 [ 24.061057] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f66a817f000 [ 24.061904] RBP: 00007f66a817f000 R08: 0000000000000009 R09: 0000000000001000 [ 24.062744] R10: 0000000000000812 R11: 0000000000000206 R12: 000055da439d0ec0 [ 24.063584] R13: 00007fff065b6b90 R14: 00007fff065b6bc0 R15: 00007fff065b6f20 [ 24.064433] [ 24.064725] [ 24.064940] Allocated by task 212: [ 24.065377] kasan_save_stack+0x22/0x50 [ 24.065879] kasan_set_track+0x25/0x30 [ 24.066379] __kasan_slab_alloc+0x59/0x70 [ 24.066904] kmem_cache_alloc+0x16b/0x370 [ 24.067417] vm_area_dup+0x20/0x160 [ 24.067871] __split_vma+0x170/0x950 [ 24.068332] split_vma+0xc6/0x110 [ 24.068775] mprotect_fixup+0x8d2/0xb30 [ 24.069294] do_mprotect_pkey+0x87e/0xd40 [ 24.069818] __x64_sys_mprotect+0x78/0xc0 [ 24.070339] do_syscall_64+0x3f/0x90 [ 24.070809] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.071450] [ 24.071665] Freed by task 19: [ 24.072045] kasan_save_stack+0x22/0x50 [ 24.072549] kasan_set_track+0x25/0x30 [ 24.073040] kasan_save_free_info+0x2b/0x50 [ 24.073578] __kasan_slab_free+0x10a/0x190 [ 24.074112] kmem_cache_free+0x10d/0x4d0 [ 24.074622] rcu_core+0x8c8/0x2860 [ 24.075068] __do_softirq+0x1b7/0x7d4 [ 24.075552] [ 24.075768] Last potentially related work creation: [ 24.076348] kasan_save_stack+0x22/0x50 [ 24.076845] __kasan_record_aux_stack+0x8e/0xa0 [ 24.077436] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.078075] remove_vma+0x139/0x170 [ 24.078526] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.079087] do_vmi_munmap+0x1f1/0x2b0 [ 24.079571] __vm_munmap+0x138/0x3a0 [ 24.080029] __x64_sys_munmap+0x59/0x80 [ 24.080527] do_syscall_64+0x3f/0x90 [ 24.081001] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.081648] [ 24.081864] The buggy address belongs to the object at ffff888009676910 [ 24.081864] which belongs to the cache vm_area_struct of size 168 [ 24.083312] The buggy address is located 88 bytes inside of [ 24.083312] freed 168-byte region [ffff888009676910, ffff8880096769b8) [ 24.084702] [ 24.084920] The buggy address belongs to the physical page: [ 24.085584] page:000000002eb677a6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9676 [ 24.086655] memcg:ffff88800eb82c01 [ 24.087079] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.087726] page_type: 0xffffffff() [ 24.088176] raw: 0100000000000200 ffff8880087a0c80 ffffea00005a2c00 dead000000000006 [ 24.089086] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eb82c01 [ 24.089997] page dumped because: kasan: bad access detected [ 24.090655] [ 24.090871] Memory state around the buggy address: [ 24.091454] ffff888009676800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 24.092310] ffff888009676880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 24.093156] >ffff888009676900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.094007] ^ [ 24.094783] ffff888009676980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 24.095632] ffff888009676a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.096472] ================================================================== [ 24.097685] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.235286] BUG: Bad rss-counter state mm:000000004f5eec29 type:MM_FILEPAGES val:33 [ 26.236424] BUG: Bad rss-counter state mm:000000004f5eec29 type:MM_ANONPAGES val:22 [ 26.729628] BUG: Bad rss-counter state mm:00000000722d9dd7 type:MM_FILEPAGES val:33 [ 26.730795] BUG: Bad rss-counter state mm:00000000722d9dd7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:52252' (ECDSA) to the list of known hosts. 2023/06/20 12:20:34 fuzzer started 2023/06/20 12:20:34 dialing manager at localhost:36067 2023/06/20 12:20:34 checking machine... 2023/06/20 12:20:34 checking revisions... [ 27.410296] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:20:35 testing simple program... [ 27.454447] cgroup: Unknown subsys name 'net' [ 27.512045] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:20:34 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=ffff888008c04000 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=00007ffc1ace6ca8 CR3=00000000145d2000 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=2034333a30323a3231203032206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034333a30323a3231203032 XMM08=65747379733a755f6d65747379733d6a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000050 RBX=ffff88800f2d0000 RCX=0000000000000000 RDX=0000000000010177 RSI=ffffffff8219168b RDI=0000000000000007 RBP=00000000000003e7 RSP=ffff88801002f420 R8 =0000000000000007 R9 =0000000000010000 R10=0000000000010177 R11=0000000000000128 R12=0000000000010177 R13=ffffed1001e5a001 R14=dffffc0000000000 R15=ffffffff85a23960 RIP=ffffffff8219168f RFL=00000093 [--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 =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=00007fa326588650 CR3=00000000147ee000 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=ffffffff00ffffffffffffffffffffff XMM01=707465675f6c697475646f6d6d61705f XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000