[ 42.328393] BUG: Bad rss-counter state mm:00000000bed8fde0 type:MM_FILEPAGES val:33 [ 42.330152] BUG: Bad rss-counter state mm:00000000bed8fde0 type:MM_ANONPAGES val:22 [ 42.494894] ================================================================== [ 42.495953] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 42.497016] Read of size 8 at addr ffff8880096e1798 by task sshd/218 [ 42.497940] [ 42.498157] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 42.499025] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 42.500030] Call Trace: [ 42.500353] [ 42.500639] dump_stack_lvl+0x91/0xf0 [ 42.501137] print_report+0xcc/0x620 [ 42.501640] ? __virt_addr_valid+0x102/0x340 [ 42.502207] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.502827] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.503448] kasan_report+0xbe/0xf0 [ 42.503928] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.504558] vma_interval_tree_remove+0xc75/0xec0 [ 42.505166] vma_prepare+0xc54/0x11a0 [ 42.505644] __split_vma+0x5af/0x950 [ 42.506117] ? __pfx___split_vma+0x10/0x10 [ 42.506647] ? find_held_lock+0x2c/0x110 [ 42.507170] do_vmi_align_munmap+0x2ba/0x11f0 [ 42.507737] ? lock_is_held_type+0x9f/0x120 [ 42.508307] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 42.508918] ? mtree_range_walk+0x632/0x900 [ 42.509474] ? mas_walk+0x5c7/0x7c0 [ 42.509948] do_vmi_munmap+0x1f1/0x2b0 [ 42.510443] mmap_region+0x1f9/0x2660 [ 42.510921] ? vm_mmap_pgoff+0x15c/0x3a0 [ 42.511435] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 42.512163] ? __pfx_lock_acquire+0x10/0x10 [ 42.512700] ? __pfx_mmap_region+0x10/0x10 [ 42.513235] ? security_mmap_addr+0x7d/0xa0 [ 42.513774] ? get_unmapped_area+0x1f5/0x3f0 [ 42.514330] do_mmap+0x854/0xf00 [ 42.514777] vm_mmap_pgoff+0x1a6/0x3a0 [ 42.515278] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 42.515841] ksys_mmap_pgoff+0x3af/0x500 [ 42.516362] do_syscall_64+0x3f/0x90 [ 42.516840] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.517488] RIP: 0033:0x7f71fbf53d82 [ 42.517945] 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 [ 42.520105] RSP: 002b:00007ffd2e1ad2f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 42.521015] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f71fbf53d82 [ 42.521871] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f71fb38d000 [ 42.522727] RBP: 00007f71fb38d000 R08: 0000000000000009 R09: 0000000000001000 [ 42.523587] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562a469d9f70 [ 42.524455] R13: 00007ffd2e1ad310 R14: 00007ffd2e1ad340 R15: 00007ffd2e1ad6a0 [ 42.525318] [ 42.525612] [ 42.525827] Allocated by task 211: [ 42.526258] kasan_save_stack+0x22/0x50 [ 42.526763] kasan_set_track+0x25/0x30 [ 42.527264] __kasan_slab_alloc+0x59/0x70 [ 42.527789] kmem_cache_alloc+0x16b/0x370 [ 42.528333] vm_area_dup+0x20/0x160 [ 42.528794] __split_vma+0x170/0x950 [ 42.529267] split_vma+0xc6/0x110 [ 42.529714] mprotect_fixup+0x8d2/0xb30 [ 42.530216] do_mprotect_pkey+0x87e/0xd40 [ 42.530739] __x64_sys_mprotect+0x78/0xc0 [ 42.531265] do_syscall_64+0x3f/0x90 [ 42.531748] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.532406] [ 42.532623] Freed by task 211: [ 42.533021] kasan_save_stack+0x22/0x50 [ 42.533527] kasan_set_track+0x25/0x30 [ 42.534020] kasan_save_free_info+0x2b/0x50 [ 42.534555] __kasan_slab_free+0x10a/0x190 [ 42.535095] kmem_cache_free+0x10d/0x4d0 [ 42.535604] rcu_core+0x8c8/0x2860 [ 42.536064] __do_softirq+0x1b7/0x7d4 [ 42.536552] [ 42.536767] Last potentially related work creation: [ 42.537358] kasan_save_stack+0x22/0x50 [ 42.537865] __kasan_record_aux_stack+0x8e/0xa0 [ 42.538441] __call_rcu_common.constprop.0+0x6a/0xb90 [ 42.539088] remove_vma+0x139/0x170 [ 42.539549] do_vmi_align_munmap+0xd4a/0x11f0 [ 42.540119] do_vmi_munmap+0x1f1/0x2b0 [ 42.540609] __vm_munmap+0x138/0x3a0 [ 42.541083] __x64_sys_munmap+0x59/0x80 [ 42.541584] do_syscall_64+0x3f/0x90 [ 42.542061] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.542706] [ 42.542920] The buggy address belongs to the object at ffff8880096e1740 [ 42.542920] which belongs to the cache vm_area_struct of size 168 [ 42.544417] The buggy address is located 88 bytes inside of [ 42.544417] freed 168-byte region [ffff8880096e1740, ffff8880096e17e8) [ 42.545833] [ 42.546049] The buggy address belongs to the physical page: [ 42.546712] page:00000000848c0d64 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x96e1 [ 42.547806] memcg:ffff88800e600801 [ 42.548252] flags: 0x100000000000200(slab|node=0|zone=1) [ 42.548904] page_type: 0xffffffff() [ 42.549362] raw: 0100000000000200 ffff88800879fc80 ffffea00003b2800 dead000000000008 [ 42.550279] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e600801 [ 42.551196] page dumped because: kasan: bad access detected [ 42.551865] [ 42.552100] Memory state around the buggy address: [ 42.552690] ffff8880096e1680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 42.553561] ffff8880096e1700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 42.554428] >ffff8880096e1780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 42.555286] ^ [ 42.555784] ffff8880096e1800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 42.556659] ffff8880096e1880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 42.557512] ================================================================== [ 42.558575] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 44.391277] BUG: Bad rss-counter state mm:00000000b7286541 type:MM_FILEPAGES val:33 [ 44.392138] BUG: Bad rss-counter state mm:00000000b7286541 type:MM_ANONPAGES val:22 [ 44.909566] BUG: Bad rss-counter state mm:0000000060e6b287 type:MM_FILEPAGES val:33 [ 44.910626] BUG: Bad rss-counter state mm:0000000060e6b287 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:21724' (ECDSA) to the list of known hosts. 2023/06/20 04:25:37 fuzzer started 2023/06/20 04:25:37 dialing manager at localhost:44161 2023/06/20 04:25:37 checking machine... 2023/06/20 04:25:37 checking revisions... [ 45.651747] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:25:38 testing simple program... [ 45.691138] cgroup: Unknown subsys name 'net' [ 45.728573] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:25:26 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffffffff813ad420 RCX=ffffffff86137501 RDX=ffff88806ce09e00 RSI=0000000000000000 RDI=ffff88806ce09aa8 RBP=ffff88806ce02000 RSP=ffff88806ce09a68 R8 =ffffffff86137542 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000020d8a R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88806ce09df8 R15=ffff88806ce09a98 RIP=ffffffff81130930 RFL=00000296 [--S-AP-] 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 00007ff16c75c900 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=0000562b31565050 CR3=000000000cb6a000 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=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 info registers vcpu 1 RAX=0000000000000000 RBX=000000000000001e RCX=0000000002aac934 RDX=000000000000001e RSI=000056102d9d74f0 RDI=00007ffe05f71110 RBP=000056102d9e6f30 RSP=00007ffe05f70c98 R8 =000000000000002c R9 =00007ffe05fa0080 R10=00007ffe05fa0090 R11=0000000000013200 R12=00007ffe05f71350 R13=00007ffe05f710f0 R14=00007ffe05f71110 R15=0000000000000000 RIP=00007f907b5972e4 RFL=00000202 [-------] 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 00007f907ac70900 00000000 00000000 GS =0000 0000000000000000 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=00007f907a077b80 CR3=000000000d8fc000 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=5f369ceff4ccb796754c64257dc634f1 XMM02=5f6d65747379733a755f6d6574737973 XMM03=000000000011df98ec2efd57dc4c00df XMM04=f6761f93a40a1bcd00000000000ae988 XMM05=ee332cfb4e19091c00000000001356b0 XMM06=751b9502027dc0b900000000001341f8 XMM07=fb795ef6d65770560000000000124938 XMM08=2c67c8bc2e329bc3000000000011df98 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000