[ 23.912021] BUG: Bad rss-counter state mm:000000003484bc5a type:MM_FILEPAGES val:33 [ 23.912903] BUG: Bad rss-counter state mm:000000003484bc5a type:MM_ANONPAGES val:22 [ 24.032017] ================================================================== [ 24.032712] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.033424] Read of size 8 at addr ffff888017c2e310 by task sshd/218 [ 24.034013] [ 24.034185] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.034929] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.035690] Call Trace: [ 24.035933] [ 24.036156] dump_stack_lvl+0x91/0xf0 [ 24.036546] print_report+0xcc/0x620 [ 24.036916] ? __virt_addr_valid+0x102/0x340 [ 24.037336] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.037807] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.038276] kasan_report+0xbe/0xf0 [ 24.038644] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.039134] vma_interval_tree_remove+0xc75/0xec0 [ 24.039584] vma_prepare+0xc54/0x11a0 [ 24.039919] __split_vma+0x5af/0x950 [ 24.040248] ? __pfx___split_vma+0x10/0x10 [ 24.040614] ? find_held_lock+0x2c/0x110 [ 24.040978] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.041362] ? lock_is_held_type+0x9f/0x120 [ 24.041725] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.042134] ? mtree_range_walk+0x632/0x900 [ 24.042503] ? mas_walk+0x5c7/0x7c0 [ 24.042827] do_vmi_munmap+0x1f1/0x2b0 [ 24.043166] mmap_region+0x1f9/0x2660 [ 24.043490] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.043835] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.044316] ? __pfx_lock_acquire+0x10/0x10 [ 24.044685] ? __pfx_mmap_region+0x10/0x10 [ 24.045050] ? security_mmap_addr+0x7d/0xa0 [ 24.045424] ? get_unmapped_area+0x1f5/0x3f0 [ 24.045803] do_mmap+0x854/0xf00 [ 24.046111] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.046449] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.046824] ksys_mmap_pgoff+0x3af/0x500 [ 24.047172] do_syscall_64+0x3f/0x90 [ 24.047493] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.047927] RIP: 0033:0x7f345f0c0d82 [ 24.048235] 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 [ 24.049658] RSP: 002b:00007ffe9a7e2bc8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.050258] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f345f0c0d82 [ 24.050811] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f345e4fa000 [ 24.051392] RBP: 00007f345e4fa000 R08: 0000000000000009 R09: 0000000000001000 [ 24.051950] R10: 0000000000000812 R11: 0000000000000206 R12: 000056245ca64f70 [ 24.052508] R13: 00007ffe9a7e2be0 R14: 00007ffe9a7e2c10 R15: 00007ffe9a7e2f70 [ 24.053075] [ 24.053267] [ 24.053409] Allocated by task 207: [ 24.053692] kasan_save_stack+0x22/0x50 [ 24.054027] kasan_set_track+0x25/0x30 [ 24.054352] __kasan_slab_alloc+0x59/0x70 [ 24.054700] kmem_cache_alloc+0x16b/0x370 [ 24.055052] vm_area_dup+0x20/0x160 [ 24.055358] __split_vma+0x170/0x950 [ 24.055676] split_vma+0xc6/0x110 [ 24.055992] mprotect_fixup+0x8d2/0xb30 [ 24.056357] do_mprotect_pkey+0x87e/0xd40 [ 24.056704] __x64_sys_mprotect+0x78/0xc0 [ 24.057035] do_syscall_64+0x3f/0x90 [ 24.057338] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.057747] [ 24.057885] Freed by task 207: [ 24.058134] kasan_save_stack+0x22/0x50 [ 24.058451] kasan_set_track+0x25/0x30 [ 24.058767] kasan_save_free_info+0x2b/0x50 [ 24.059117] __kasan_slab_free+0x10a/0x190 [ 24.059460] kmem_cache_free+0x10d/0x4d0 [ 24.059781] rcu_core+0x8c8/0x2860 [ 24.060064] __do_softirq+0x1b7/0x7d4 [ 24.060370] [ 24.060509] Last potentially related work creation: [ 24.060879] kasan_save_stack+0x22/0x50 [ 24.061201] __kasan_record_aux_stack+0x8e/0xa0 [ 24.061567] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.061974] remove_vma+0x139/0x170 [ 24.062259] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.062616] do_vmi_munmap+0x1f1/0x2b0 [ 24.062917] __vm_munmap+0x138/0x3a0 [ 24.063216] __x64_sys_munmap+0x59/0x80 [ 24.063529] do_syscall_64+0x3f/0x90 [ 24.063829] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.064234] [ 24.064370] The buggy address belongs to the object at ffff888017c2e2b8 [ 24.064370] which belongs to the cache vm_area_struct of size 168 [ 24.065292] The buggy address is located 88 bytes inside of [ 24.065292] freed 168-byte region [ffff888017c2e2b8, ffff888017c2e360) [ 24.066168] [ 24.066304] The buggy address belongs to the physical page: [ 24.066717] page:000000007b16cc3f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x17c2e [ 24.067417] memcg:ffff888017e78c01 [ 24.067684] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.068090] page_type: 0xffffffff() [ 24.068376] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 24.068954] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888017e78c01 [ 24.069518] page dumped because: kasan: bad access detected [ 24.069931] [ 24.070067] Memory state around the buggy address: [ 24.070430] ffff888017c2e200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 24.070965] ffff888017c2e280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 24.071511] >ffff888017c2e300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 24.072044] ^ [ 24.072337] ffff888017c2e380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 24.072873] ffff888017c2e400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 24.073408] ================================================================== [ 24.074010] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 25.836416] BUG: Bad rss-counter state mm:00000000b01f83f3 type:MM_FILEPAGES val:33 [ 25.837459] BUG: Bad rss-counter state mm:00000000b01f83f3 type:MM_ANONPAGES val:22 [ 26.276387] BUG: Bad rss-counter state mm:000000008d57d1cc type:MM_FILEPAGES val:33 [ 26.277851] BUG: Bad rss-counter state mm:000000008d57d1cc type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:16512' (ECDSA) to the list of known hosts. 2023/06/20 14:11:26 fuzzer started 2023/06/20 14:11:26 dialing manager at localhost:36067 2023/06/20 14:11:26 checking machine... 2023/06/20 14:11:26 checking revisions... [ 26.962349] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:11:26 testing simple program... [ 27.019481] cgroup: Unknown subsys name 'net' [ 27.094280] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:11:26 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888016417d80 RCX=0000000000000000 RDX=ffff88800cc751c0 RSI=ffffffff838727ea RDI=0000000000000005 RBP=00000000000000f4 RSP=ffff888016417be8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=656d616e74736f68 R12=00000000000000f4 R13=0000000000000000 R14=0000000000000000 R15=ffff8880196a3140 RIP=ffffffff838727ea 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fa5d21fc900 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=00007ffd24307000 CR3=000000000fcf0000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 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=ffff888008c04400 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=00007f2a53b1d608 CR3=000000000c5d2000 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=a9a7cbad2869c49f67434175d9cf2007 XMM02=000000000011af38eff9b2d0a8fce9cb XMM03=000000000011b0082c67c8bc2e329bc3 XMM04=73e24a211536abec00000000000ae988 XMM05=751b9502027dc0b90000000000131288 XMM06=da78dc8f8b8e3cc80000000000130440 XMM07=e042d86d42eb936e0000000000120bd8 XMM08=e22422ed5b48d0fb000000000011b008 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000