[ 24.421077] BUG: Bad rss-counter state mm:000000002a4b8cd9 type:MM_FILEPAGES val:33 [ 24.422757] BUG: Bad rss-counter state mm:000000002a4b8cd9 type:MM_ANONPAGES val:22 [ 24.575116] ================================================================== [ 24.576028] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.576973] Read of size 8 at addr ffff888019f56968 by task sshd/220 [ 24.577774] [ 24.577994] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 24.578925] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.579913] Call Trace: [ 24.580254] [ 24.580540] dump_stack_lvl+0x91/0xf0 [ 24.581036] print_report+0xcc/0x620 [ 24.581524] ? __virt_addr_valid+0x102/0x340 [ 24.582100] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.582719] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.583332] kasan_report+0xbe/0xf0 [ 24.583810] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.584443] vma_interval_tree_remove+0xc75/0xec0 [ 24.585048] vma_prepare+0xc54/0x11a0 [ 24.585532] __split_vma+0x5af/0x950 [ 24.586014] ? __pfx___split_vma+0x10/0x10 [ 24.586546] ? find_held_lock+0x2c/0x110 [ 24.587066] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.587638] ? lock_is_held_type+0x9f/0x120 [ 24.588181] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.588805] ? mtree_range_walk+0x632/0x900 [ 24.589369] ? mas_walk+0x5c7/0x7c0 [ 24.589866] do_vmi_munmap+0x1f1/0x2b0 [ 24.590363] mmap_region+0x1f9/0x2660 [ 24.590849] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.591366] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.592097] ? __pfx_lock_acquire+0x10/0x10 [ 24.592627] ? __pfx_mmap_region+0x10/0x10 [ 24.593156] ? security_mmap_addr+0x7d/0xa0 [ 24.593699] ? get_unmapped_area+0x1f5/0x3f0 [ 24.594258] do_mmap+0x854/0xf00 [ 24.594700] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.595195] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.595756] ksys_mmap_pgoff+0x3af/0x500 [ 24.596279] do_syscall_64+0x3f/0x90 [ 24.596758] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.597408] RIP: 0033:0x7f18b983fd82 [ 24.597873] 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 [ 24.600002] RSP: 002b:00007fffc5b90378 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.600911] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f18b983fd82 [ 24.601773] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f18b8c79000 [ 24.602627] RBP: 00007f18b8c79000 R08: 0000000000000009 R09: 0000000000001000 [ 24.603463] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556aff24ef70 [ 24.604296] R13: 00007fffc5b90390 R14: 00007fffc5b903c0 R15: 00007fffc5b90720 [ 24.605153] [ 24.605448] [ 24.605670] Allocated by task 213: [ 24.606098] kasan_save_stack+0x22/0x50 [ 24.606607] kasan_set_track+0x25/0x30 [ 24.607115] __kasan_slab_alloc+0x59/0x70 [ 24.607639] kmem_cache_alloc+0x16b/0x370 [ 24.608157] vm_area_dup+0x20/0x160 [ 24.608623] __split_vma+0x170/0x950 [ 24.609090] split_vma+0xc6/0x110 [ 24.609530] mprotect_fixup+0x8d2/0xb30 [ 24.610060] do_mprotect_pkey+0x87e/0xd40 [ 24.610581] __x64_sys_mprotect+0x78/0xc0 [ 24.611117] do_syscall_64+0x3f/0x90 [ 24.611600] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.612246] [ 24.612461] Freed by task 213: [ 24.612854] kasan_save_stack+0x22/0x50 [ 24.613361] kasan_set_track+0x25/0x30 [ 24.613868] kasan_save_free_info+0x2b/0x50 [ 24.614405] __kasan_slab_free+0x10a/0x190 [ 24.614943] kmem_cache_free+0x10d/0x4d0 [ 24.615456] rcu_core+0x8c8/0x2860 [ 24.615898] __do_softirq+0x1b7/0x7d4 [ 24.616371] [ 24.616584] Last potentially related work creation: [ 24.617191] kasan_save_stack+0x22/0x50 [ 24.617724] __kasan_record_aux_stack+0x8e/0xa0 [ 24.618311] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.618963] remove_vma+0x139/0x170 [ 24.619428] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.619986] do_vmi_munmap+0x1f1/0x2b0 [ 24.620474] __vm_munmap+0x138/0x3a0 [ 24.620944] __x64_sys_munmap+0x59/0x80 [ 24.621444] do_syscall_64+0x3f/0x90 [ 24.621932] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.622587] [ 24.622801] The buggy address belongs to the object at ffff888019f56910 [ 24.622801] which belongs to the cache vm_area_struct of size 168 [ 24.624264] The buggy address is located 88 bytes inside of [ 24.624264] freed 168-byte region [ffff888019f56910, ffff888019f569b8) [ 24.625673] [ 24.625886] The buggy address belongs to the physical page: [ 24.626558] page:00000000d571cce9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19f56 [ 24.627659] memcg:ffff88800d294901 [ 24.628085] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.628735] page_type: 0xffffffff() [ 24.629188] raw: 0100000000000200 ffff88800879fc80 ffffea00005969c0 dead000000000002 [ 24.630119] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d294901 [ 24.631030] page dumped because: kasan: bad access detected [ 24.631685] [ 24.631901] Memory state around the buggy address: [ 24.632480] ffff888019f56800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 24.633340] ffff888019f56880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 24.634201] >ffff888019f56900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.635060] ^ [ 24.635836] ffff888019f56980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 24.636697] ffff888019f56a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.637549] ================================================================== [ 24.638516] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.595686] BUG: Bad rss-counter state mm:00000000866d6611 type:MM_FILEPAGES val:33 [ 26.596933] BUG: Bad rss-counter state mm:00000000866d6611 type:MM_ANONPAGES val:22 [ 27.153666] BUG: Bad rss-counter state mm:000000002a81544d type:MM_FILEPAGES val:33 [ 27.154842] BUG: Bad rss-counter state mm:000000002a81544d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:53309' (ECDSA) to the list of known hosts. 2023/06/19 17:30:56 fuzzer started 2023/06/19 17:30:56 dialing manager at localhost:44161 2023/06/19 17:30:56 checking machine... 2023/06/19 17:30:56 checking revisions... [ 27.819168] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:30:56 testing simple program... [ 27.870333] cgroup: Unknown subsys name 'net' [ 27.906471] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:30:56 Registers: info registers vcpu 0 RAX=000055dda0a234c0 RBX=000055dda0a368d0 RCX=0000000000000000 RDX=0000000000000002 RSI=0000000000000004 RDI=000055dda0a1f350 RBP=0000000000000000 RSP=00007ffe85a48350 R8 =000055dda0a1eeb0 R9 =00007ffe85a41738 R10=000055dda04b6d21 R11=0000000000000246 R12=000055dda0a1f350 R13=0000000000000002 R14=0000000000000004 R15=000055dda0a234c0 RIP=00007f337eb96eca RFL=00000246 [---Z-P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f337e071900 00000000 00000000 GS =0000 0000000000000000 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=00007ffe85a42000 CR3=000000000c5fe000 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=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=00007f5b1230d018 CR3=00000000097fe000 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=247c8112b01986b2b944460141c81d96 XMM02=000000000011c288eff9b2d0a8fce9cb XMM03=000000000011c3582c67c8bc2e329bc3 XMM04=c5d4efb317d328ba00000000000ae988 XMM05=58b136ea0cf5a5780000000000133a10 XMM06=4fda316b135da52b0000000000132470 XMM07=e042d86d42eb936e0000000000122fc0 XMM08=4adba31cafa09664000000000011c358 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000