[ 27.889079] BUG: Bad rss-counter state mm:0000000029a12562 type:MM_FILEPAGES val:33 [ 27.890258] BUG: Bad rss-counter state mm:0000000029a12562 type:MM_ANONPAGES val:22 [ 28.072217] ================================================================== [ 28.073307] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.074292] Read of size 8 at addr ffff888018254c20 by task sshd/219 [ 28.075104] [ 28.075329] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 28.076237] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.077276] Call Trace: [ 28.077608] [ 28.077891] dump_stack_lvl+0x91/0xf0 [ 28.078382] print_report+0xcc/0x620 [ 28.078891] ? __virt_addr_valid+0x102/0x340 [ 28.079471] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.080120] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.080775] kasan_report+0xbe/0xf0 [ 28.081288] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.081946] vma_interval_tree_remove+0xc75/0xec0 [ 28.082585] vma_prepare+0xc54/0x11a0 [ 28.083092] __split_vma+0x5af/0x950 [ 28.083582] ? __pfx___split_vma+0x10/0x10 [ 28.084136] ? find_held_lock+0x2c/0x110 [ 28.084689] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.085288] ? lock_is_held_type+0x9f/0x120 [ 28.085860] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.086497] ? mtree_range_walk+0x632/0x900 [ 28.087072] ? mas_walk+0x5c7/0x7c0 [ 28.087582] do_vmi_munmap+0x1f1/0x2b0 [ 28.088104] mmap_region+0x1f9/0x2660 [ 28.088607] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.089152] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.089904] ? __pfx_lock_acquire+0x10/0x10 [ 28.090459] ? __pfx_mmap_region+0x10/0x10 [ 28.091025] ? security_mmap_addr+0x7d/0xa0 [ 28.091584] ? get_unmapped_area+0x1f5/0x3f0 [ 28.092168] do_mmap+0x854/0xf00 [ 28.092628] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.093163] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.093763] ksys_mmap_pgoff+0x3af/0x500 [ 28.094296] do_syscall_64+0x3f/0x90 [ 28.094806] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.095488] RIP: 0033:0x7f846b5c5d82 [ 28.095971] 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 [ 28.098255] RSP: 002b:00007ffcc27aabd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.099218] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f846b5c5d82 [ 28.100117] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f846a9ff000 [ 28.101047] RBP: 00007f846a9ff000 R08: 0000000000000009 R09: 0000000000001000 [ 28.101943] R10: 0000000000000812 R11: 0000000000000206 R12: 000055accda13ec0 [ 28.102851] R13: 00007ffcc27aabf0 R14: 00007ffcc27aac20 R15: 00007ffcc27aaf80 [ 28.103764] [ 28.104078] [ 28.104304] Allocated by task 206: [ 28.104758] kasan_save_stack+0x22/0x50 [ 28.105296] kasan_set_track+0x25/0x30 [ 28.105817] __kasan_slab_alloc+0x59/0x70 [ 28.106358] kmem_cache_alloc+0x16b/0x370 [ 28.106907] vm_area_dup+0x20/0x160 [ 28.107390] __split_vma+0x170/0x950 [ 28.107945] split_vma+0xc6/0x110 [ 28.108399] mprotect_fixup+0x8d2/0xb30 [ 28.108932] do_mprotect_pkey+0x87e/0xd40 [ 28.109500] __x64_sys_mprotect+0x78/0xc0 [ 28.110059] do_syscall_64+0x3f/0x90 [ 28.110562] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.111255] [ 28.111480] Freed by task 13: [ 28.111890] kasan_save_stack+0x22/0x50 [ 28.112415] kasan_set_track+0x25/0x30 [ 28.112930] kasan_save_free_info+0x2b/0x50 [ 28.113490] __kasan_slab_free+0x10a/0x190 [ 28.114040] kmem_cache_free+0x10d/0x4d0 [ 28.114571] rcu_core+0x8c8/0x2860 [ 28.115031] __do_softirq+0x1b7/0x7d4 [ 28.115531] [ 28.115756] Last potentially related work creation: [ 28.116365] kasan_save_stack+0x22/0x50 [ 28.116887] __kasan_record_aux_stack+0x8e/0xa0 [ 28.117488] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.118152] remove_vma+0x139/0x170 [ 28.118620] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.119195] do_vmi_munmap+0x1f1/0x2b0 [ 28.119699] __vm_munmap+0x138/0x3a0 [ 28.120186] __x64_sys_munmap+0x59/0x80 [ 28.120700] do_syscall_64+0x3f/0x90 [ 28.121216] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.121878] [ 28.122100] The buggy address belongs to the object at ffff888018254bc8 [ 28.122100] which belongs to the cache vm_area_struct of size 168 [ 28.123633] The buggy address is located 88 bytes inside of [ 28.123633] freed 168-byte region [ffff888018254bc8, ffff888018254c70) [ 28.125102] [ 28.125327] The buggy address belongs to the physical page: [ 28.126016] page:0000000060e85522 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18254 [ 28.127153] memcg:ffff88800cd3d001 [ 28.127599] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 28.128318] page_type: 0xffffffff() [ 28.128791] raw: 0100000000000200 ffff88800879fc80 0000000000000000 0000000000000001 [ 28.129768] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cd3d001 [ 28.130718] page dumped because: kasan: bad access detected [ 28.131401] [ 28.131626] Memory state around the buggy address: [ 28.132224] ffff888018254b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.133138] ffff888018254b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 28.134033] >ffff888018254c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 28.134905] ^ [ 28.135450] ffff888018254c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 28.136344] ffff888018254d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 28.137257] ================================================================== [ 28.138421] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 30.297477] BUG: Bad rss-counter state mm:0000000028837986 type:MM_FILEPAGES val:33 [ 30.298648] BUG: Bad rss-counter state mm:0000000028837986 type:MM_ANONPAGES val:22 [ 30.713810] BUG: Bad rss-counter state mm:0000000079dd69bd type:MM_FILEPAGES val:33 [ 30.714978] BUG: Bad rss-counter state mm:0000000079dd69bd type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:52568' (ECDSA) to the list of known hosts. 2023/06/19 12:37:34 fuzzer started 2023/06/19 12:37:34 dialing manager at localhost:44161 2023/06/19 12:37:34 checking machine... 2023/06/19 12:37:34 checking revisions... [ 31.370546] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:37:34 testing simple program... [ 31.424097] cgroup: Unknown subsys name 'net' [ 31.474787] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:37:30 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff86088c1a RDX=1ffff110028f1edf RSI=1ffff110028f1ede RDI=1ffff110028f1ede RBP=ffff88801478f6f0 RSP=ffff88801478f5d8 R8 =ffffffff86088c1e R9 =ffff88801478f6d8 R10=0000000000038001 R11=0000000000003c0d R12=ffff88801478f6f8 R13=ffff88801478f6e0 R14=ffff88801478f740 R15=ffff88801478f698 RIP=ffffffff811310ce 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007ff2a85e5900 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=00007f9b8acb5650 CR3=0000000013a46000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=f8c445b0aaafa4d300000000000ae988 XMM05=c1987db08379915500000000001342f0 XMM06=806171799158d9670000000000132d70 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 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=ffff888008c58400 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=00007ffdc72c2338 CR3=00000000169d8000 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=2033333a37333a3231203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033333a37333a3231203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000