[ 24.621924] BUG: Bad rss-counter state mm:0000000077042184 type:MM_FILEPAGES val:33 [ 24.623575] BUG: Bad rss-counter state mm:0000000077042184 type:MM_ANONPAGES val:22 [ 24.739412] ================================================================== [ 24.740389] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.741081] Read of size 8 at addr ffff88800f5a3c20 by task sshd/220 [ 24.741652] [ 24.741956] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 24.742613] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.743330] Call Trace: [ 24.743569] [ 24.743787] dump_stack_lvl+0x91/0xf0 [ 24.744171] print_report+0xcc/0x620 [ 24.744534] ? __virt_addr_valid+0x102/0x340 [ 24.744943] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.745399] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.745857] kasan_report+0xbe/0xf0 [ 24.746212] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.746676] vma_interval_tree_remove+0xc75/0xec0 [ 24.747132] vma_prepare+0xc54/0x11a0 [ 24.747494] __split_vma+0x5af/0x950 [ 24.747864] ? __pfx___split_vma+0x10/0x10 [ 24.748254] ? find_held_lock+0x2c/0x110 [ 24.748565] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.748904] ? lock_is_held_type+0x9f/0x120 [ 24.749225] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.749592] ? mtree_range_walk+0x632/0x900 [ 24.749922] ? mas_walk+0x5c7/0x7c0 [ 24.750207] do_vmi_munmap+0x1f1/0x2b0 [ 24.750505] mmap_region+0x1f9/0x2660 [ 24.750794] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.751105] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.751538] ? __pfx_lock_acquire+0x10/0x10 [ 24.751868] ? __pfx_mmap_region+0x10/0x10 [ 24.752186] ? security_mmap_addr+0x7d/0xa0 [ 24.752508] ? get_unmapped_area+0x1f5/0x3f0 [ 24.752837] do_mmap+0x854/0xf00 [ 24.753100] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.753400] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.753738] ksys_mmap_pgoff+0x3af/0x500 [ 24.754041] do_syscall_64+0x3f/0x90 [ 24.754328] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.754716] RIP: 0033:0x7f3b2e7e4d82 [ 24.754988] 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 [ 24.756267] RSP: 002b:00007ffdbba95758 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.756810] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3b2e7e4d82 [ 24.757320] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3b2dc1e000 [ 24.757824] RBP: 00007f3b2dc1e000 R08: 0000000000000009 R09: 0000000000001000 [ 24.758335] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c9b29bab20 [ 24.758845] R13: 00007ffdbba95770 R14: 00007ffdbba957a0 R15: 00007ffdbba95b00 [ 24.759356] [ 24.759531] [ 24.759659] Allocated by task 213: [ 24.759928] kasan_save_stack+0x22/0x50 [ 24.760228] kasan_set_track+0x25/0x30 [ 24.760523] __kasan_slab_alloc+0x59/0x70 [ 24.760834] kmem_cache_alloc+0x16b/0x370 [ 24.761142] vm_area_dup+0x20/0x160 [ 24.761413] __split_vma+0x170/0x950 [ 24.761688] split_vma+0xc6/0x110 [ 24.761952] mprotect_fixup+0x8d2/0xb30 [ 24.762254] do_mprotect_pkey+0x87e/0xd40 [ 24.762568] __x64_sys_mprotect+0x78/0xc0 [ 24.762881] do_syscall_64+0x3f/0x90 [ 24.763167] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.763551] [ 24.763682] Freed by task 213: [ 24.763917] kasan_save_stack+0x22/0x50 [ 24.764217] kasan_set_track+0x25/0x30 [ 24.764511] kasan_save_free_info+0x2b/0x50 [ 24.764827] __kasan_slab_free+0x10a/0x190 [ 24.765140] kmem_cache_free+0x10d/0x4d0 [ 24.765444] rcu_core+0x8c8/0x2860 [ 24.765710] __do_softirq+0x1b7/0x7d4 [ 24.765994] [ 24.766122] Last potentially related work creation: [ 24.766471] kasan_save_stack+0x22/0x50 [ 24.766769] __kasan_record_aux_stack+0x8e/0xa0 [ 24.767107] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.767487] remove_vma+0x139/0x170 [ 24.767753] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.768104] do_vmi_munmap+0x1f1/0x2b0 [ 24.768388] __vm_munmap+0x138/0x3a0 [ 24.768668] __x64_sys_munmap+0x59/0x80 [ 24.768962] do_syscall_64+0x3f/0x90 [ 24.769243] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.769620] [ 24.769749] The buggy address belongs to the object at ffff88800f5a3bc8 [ 24.769749] which belongs to the cache vm_area_struct of size 168 [ 24.770619] The buggy address is located 88 bytes inside of [ 24.770619] freed 168-byte region [ffff88800f5a3bc8, ffff88800f5a3c70) [ 24.771452] [ 24.771583] The buggy address belongs to the physical page: [ 24.771981] page:00000000a7562d0e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf5a3 [ 24.772623] memcg:ffff88801847fc01 [ 24.772876] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.773258] page_type: 0xffffffff() [ 24.773541] raw: 0100000000000200 ffff88800879fc80 ffffea00003ca700 000000000000000a [ 24.774114] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801847fc01 [ 24.774696] page dumped because: kasan: bad access detected [ 24.775112] [ 24.775243] Memory state around the buggy address: [ 24.775601] ffff88800f5a3b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.776153] ffff88800f5a3b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 24.776694] >ffff88800f5a3c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 24.777226] ^ [ 24.777554] ffff88800f5a3c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 24.778085] ffff88800f5a3d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 24.778618] ================================================================== [ 24.779184] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.732283] BUG: Bad rss-counter state mm:0000000040589a64 type:MM_FILEPAGES val:33 [ 26.733543] BUG: Bad rss-counter state mm:0000000040589a64 type:MM_ANONPAGES val:22 [ 27.206249] BUG: Bad rss-counter state mm:00000000909ff4e1 type:MM_FILEPAGES val:33 [ 27.207440] BUG: Bad rss-counter state mm:00000000909ff4e1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:8584' (ECDSA) to the list of known hosts. 2023/06/19 22:15:01 fuzzer started 2023/06/19 22:15:01 dialing manager at localhost:44161 2023/06/19 22:15:01 checking machine... 2023/06/19 22:15:01 checking revisions... [ 27.833347] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:15:01 testing simple program... [ 27.881749] cgroup: Unknown subsys name 'net' [ 27.928821] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:15:00 Registers: info registers vcpu 0 RAX=00000000dead4ead RBX=ffffffff856d8220 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff856d8224 RBP=1ffff1100d9c13a7 RSP=ffff88806ce09d30 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000283 R13=ffffea00003a6700 R14=ffffffff8186b9c5 R15=ffff888016348780 RIP=ffffffff812e004a RFL=00000046 [---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 00007f1322644900 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=00007f39e3ab4650 CR3=00000000095c2000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=e005842d46bc60a300000000000ae988 XMM05=dd2c6c7b412d05010000000000134890 XMM06=4fda316b135da52b0000000000133310 XMM07=fb795ef6d65770560000000000123c00 XMM08=4f5453444600273d67736d000d0a0920 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=00007ffff45adb08 CR3=000000000e428000 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=2031303a35313a3232203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030303a35313a3232203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000