[ 33.404536] BUG: Bad rss-counter state mm:00000000431fbf00 type:MM_FILEPAGES val:33 [ 33.405894] BUG: Bad rss-counter state mm:00000000431fbf00 type:MM_ANONPAGES val:22 [ 33.563597] ================================================================== [ 33.564472] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.565354] Read of size 8 at addr ffff88800ecf5ed8 by task sshd/225 [ 33.566159] [ 33.566368] CPU: 0 PID: 225 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.567197] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.568115] Call Trace: [ 33.568417] [ 33.568688] dump_stack_lvl+0x91/0xf0 [ 33.569152] print_report+0xcc/0x620 [ 33.569612] ? __virt_addr_valid+0x102/0x340 [ 33.570134] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.570722] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.571317] kasan_report+0xbe/0xf0 [ 33.571772] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.572356] vma_interval_tree_remove+0xc75/0xec0 [ 33.572928] vma_prepare+0xc54/0x11a0 [ 33.573385] __split_vma+0x5af/0x950 [ 33.573835] ? __pfx___split_vma+0x10/0x10 [ 33.574370] ? find_held_lock+0x2c/0x110 [ 33.574906] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.575461] ? lock_is_held_type+0x9f/0x120 [ 33.576026] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.576636] ? mtree_range_walk+0x632/0x900 [ 33.577185] ? mas_walk+0x5c7/0x7c0 [ 33.577659] do_vmi_munmap+0x1f1/0x2b0 [ 33.578149] mmap_region+0x1f9/0x2660 [ 33.578638] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.579163] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.579864] ? __pfx_lock_acquire+0x10/0x10 [ 33.580385] ? __pfx_mmap_region+0x10/0x10 [ 33.580913] ? security_mmap_addr+0x7d/0xa0 [ 33.581441] ? get_unmapped_area+0x1f5/0x3f0 [ 33.581991] do_mmap+0x854/0xf00 [ 33.582426] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.582939] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.583487] ksys_mmap_pgoff+0x3af/0x500 [ 33.583979] do_syscall_64+0x3f/0x90 [ 33.584450] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.585085] RIP: 0033:0x7fa5f9763d82 [ 33.585552] 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 [ 33.587671] RSP: 002b:00007ffc00c4dc68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.588556] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa5f9763d82 [ 33.589396] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa5f8b9d000 [ 33.590256] RBP: 00007fa5f8b9d000 R08: 0000000000000009 R09: 0000000000001000 [ 33.591282] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cddf30dec0 [ 33.592325] R13: 00007ffc00c4dc80 R14: 00007ffc00c4dcb0 R15: 00007ffc00c4e010 [ 33.593380] [ 33.593742] [ 33.594006] Allocated by task 217: [ 33.594531] kasan_save_stack+0x22/0x50 [ 33.595198] kasan_set_track+0x25/0x30 [ 33.595810] __kasan_slab_alloc+0x59/0x70 [ 33.596456] kmem_cache_alloc+0x16b/0x370 [ 33.597100] vm_area_dup+0x20/0x160 [ 33.597637] __split_vma+0x170/0x950 [ 33.598199] split_vma+0xc6/0x110 [ 33.598717] mprotect_fixup+0x8d2/0xb30 [ 33.599323] do_mprotect_pkey+0x87e/0xd40 [ 33.599947] __x64_sys_mprotect+0x78/0xc0 [ 33.600564] do_syscall_64+0x3f/0x90 [ 33.601140] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.601909] [ 33.602165] Freed by task 203: [ 33.602632] kasan_save_stack+0x22/0x50 [ 33.603243] kasan_set_track+0x25/0x30 [ 33.603833] kasan_save_free_info+0x2b/0x50 [ 33.604470] __kasan_slab_free+0x10a/0x190 [ 33.605107] kmem_cache_free+0x10d/0x4d0 [ 33.605710] rcu_core+0x8c8/0x2860 [ 33.606260] __do_softirq+0x1b7/0x7d4 [ 33.606872] [ 33.607139] Last potentially related work creation: [ 33.607844] kasan_save_stack+0x22/0x50 [ 33.608347] __kasan_record_aux_stack+0x8e/0xa0 [ 33.608924] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.609567] remove_vma+0x139/0x170 [ 33.610018] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.610579] do_vmi_munmap+0x1f1/0x2b0 [ 33.611068] __vm_munmap+0x138/0x3a0 [ 33.611536] __x64_sys_munmap+0x59/0x80 [ 33.612032] do_syscall_64+0x3f/0x90 [ 33.612503] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.613140] [ 33.613357] The buggy address belongs to the object at ffff88800ecf5e80 [ 33.613357] which belongs to the cache vm_area_struct of size 168 [ 33.614813] The buggy address is located 88 bytes inside of [ 33.614813] freed 168-byte region [ffff88800ecf5e80, ffff88800ecf5f28) [ 33.616225] [ 33.616440] The buggy address belongs to the physical page: [ 33.617090] page:0000000053f7c023 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xecf5 [ 33.618163] memcg:ffff88800d7fbc01 [ 33.618588] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.619238] page_type: 0xffffffff() [ 33.619683] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 33.620597] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d7fbc01 [ 33.621486] page dumped because: kasan: bad access detected [ 33.622146] [ 33.622360] Memory state around the buggy address: [ 33.622949] ffff88800ecf5d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.623798] ffff88800ecf5e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 33.624649] >ffff88800ecf5e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.625489] ^ [ 33.626222] ffff88800ecf5f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 33.627093] ffff88800ecf5f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 33.627942] ================================================================== [ 33.628999] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 35.514337] BUG: Bad rss-counter state mm:0000000085d68964 type:MM_FILEPAGES val:33 [ 35.515409] BUG: Bad rss-counter state mm:0000000085d68964 type:MM_ANONPAGES val:22 [ 35.993258] BUG: Bad rss-counter state mm:0000000036ec4ada type:MM_FILEPAGES val:33 [ 35.994399] BUG: Bad rss-counter state mm:0000000036ec4ada type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38809' (ECDSA) to the list of known hosts. 2023/06/20 01:48:35 fuzzer started 2023/06/20 01:48:35 dialing manager at localhost:44161 2023/06/20 01:48:35 checking machine... 2023/06/20 01:48:35 checking revisions... [ 36.710340] kmemleak: Automatic memory scanning thread ended 2023/06/20 01:48:36 testing simple program... [ 36.752478] cgroup: Unknown subsys name 'net' [ 36.811153] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:48:34 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=0000000000000001 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=00007f3182cb0620 CR3=000000000c57c000 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=4543970f388daf848c445f0095e546df XMM02=000000000011d000ec2efd57dc4c00df XMM03=00000000001239a0e83fd9651f3c9bab XMM04=b64114c5f8be8b2700000000000ae988 XMM05=eb2a8d0b2421a30c00000000001339f8 XMM06=ae9b264101391a5b0000000000133168 XMM07=e042d86d42eb936e0000000000123c20 XMM08=e83fd9651f3c9bab000000000011d060 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff11001de15df RBX=dffffc0000000000 RCX=0000000000000000 RDX=ffff888016b81b40 RSI=ffffffff817167c0 RDI=ffff88800ef0aef8 RBP=00007f654b87744c RSP=ffff888016ec7de8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffff88800ef0ae80 R13=00007f654b87744c R14=0000000000000040 R15=ffff88800f4da500 RIP=ffffffff817167d0 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f654b7bb900 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=00007f654b87744c CR3=000000000f352000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000