[ 105.678094] BUG: Bad rss-counter state mm:00000000d8a0e1ac type:MM_FILEPAGES val:33 [ 105.679458] BUG: Bad rss-counter state mm:00000000d8a0e1ac type:MM_ANONPAGES val:22 [ 105.829536] ================================================================== [ 105.830653] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 105.831801] Read of size 8 at addr ffff88800b9ef798 by task sshd/219 [ 105.832949] [ 105.833219] CPU: 1 PID: 219 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 105.834487] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 105.835682] Call Trace: [ 105.836075] [ 105.836452] dump_stack_lvl+0x91/0xf0 [ 105.837033] print_report+0xcc/0x620 [ 105.837533] ? __virt_addr_valid+0x102/0x340 [ 105.838099] ? vma_interval_tree_remove+0xc75/0xec0 [ 105.838739] ? vma_interval_tree_remove+0xc75/0xec0 [ 105.839364] kasan_report+0xbe/0xf0 [ 105.839853] ? vma_interval_tree_remove+0xc75/0xec0 [ 105.840489] vma_interval_tree_remove+0xc75/0xec0 [ 105.841087] vma_prepare+0xc54/0x11a0 [ 105.841564] __split_vma+0x5af/0x950 [ 105.842044] ? __pfx___split_vma+0x10/0x10 [ 105.842578] ? find_held_lock+0x2c/0x110 [ 105.843104] do_vmi_align_munmap+0x2ba/0x11f0 [ 105.843666] ? lock_is_held_type+0x9f/0x120 [ 105.844219] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 105.844834] ? mtree_range_walk+0x632/0x900 [ 105.845379] ? mas_walk+0x5c7/0x7c0 [ 105.845852] do_vmi_munmap+0x1f1/0x2b0 [ 105.846343] mmap_region+0x1f9/0x2660 [ 105.846820] ? vm_mmap_pgoff+0x15c/0x3a0 [ 105.847326] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 105.848036] ? __pfx_lock_acquire+0x10/0x10 [ 105.848582] ? __pfx_mmap_region+0x10/0x10 [ 105.849109] ? security_mmap_addr+0x7d/0xa0 [ 105.849634] ? get_unmapped_area+0x1f5/0x3f0 [ 105.850185] do_mmap+0x854/0xf00 [ 105.850621] vm_mmap_pgoff+0x1a6/0x3a0 [ 105.851113] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 105.851671] ksys_mmap_pgoff+0x3af/0x500 [ 105.852188] do_syscall_64+0x3f/0x90 [ 105.852666] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 105.853314] RIP: 0033:0x7f21bffd7d82 [ 105.853777] 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 [ 105.855897] RSP: 002b:00007fff0f626808 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 105.856817] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f21bffd7d82 [ 105.857656] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f21bf411000 [ 105.858495] RBP: 00007f21bf411000 R08: 0000000000000009 R09: 0000000000001000 [ 105.859332] R10: 0000000000000812 R11: 0000000000000206 R12: 00005564c3160f60 [ 105.860168] R13: 00007fff0f626820 R14: 00007fff0f626850 R15: 00007fff0f626bb0 [ 105.861022] [ 105.861318] [ 105.861530] Allocated by task 212: [ 105.861963] kasan_save_stack+0x22/0x50 [ 105.862469] kasan_set_track+0x25/0x30 [ 105.862957] __kasan_slab_alloc+0x59/0x70 [ 105.863474] kmem_cache_alloc+0x16b/0x370 [ 105.863991] vm_area_dup+0x20/0x160 [ 105.864451] __split_vma+0x170/0x950 [ 105.864916] split_vma+0xc6/0x110 [ 105.865354] mprotect_fixup+0x8d2/0xb30 [ 105.865856] do_mprotect_pkey+0x87e/0xd40 [ 105.866378] __x64_sys_mprotect+0x78/0xc0 [ 105.866897] do_syscall_64+0x3f/0x90 [ 105.867375] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 105.868013] [ 105.868252] Freed by task 212: [ 105.868642] kasan_save_stack+0x22/0x50 [ 105.869145] kasan_set_track+0x25/0x30 [ 105.869640] kasan_save_free_info+0x2b/0x50 [ 105.870169] __kasan_slab_free+0x10a/0x190 [ 105.870704] kmem_cache_free+0x10d/0x4d0 [ 105.871221] rcu_core+0x8c8/0x2860 [ 105.871663] __do_softirq+0x1b7/0x7d4 [ 105.872138] [ 105.872367] Last potentially related work creation: [ 105.872948] kasan_save_stack+0x22/0x50 [ 105.873502] __kasan_record_aux_stack+0x8e/0xa0 [ 105.874079] __call_rcu_common.constprop.0+0x6a/0xb90 [ 105.874717] remove_vma+0x139/0x170 [ 105.875166] do_vmi_align_munmap+0xd4a/0x11f0 [ 105.875725] do_vmi_munmap+0x1f1/0x2b0 [ 105.876229] __vm_munmap+0x138/0x3a0 [ 105.876699] __x64_sys_munmap+0x59/0x80 [ 105.877207] do_syscall_64+0x3f/0x90 [ 105.877695] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 105.878335] [ 105.878558] Second to last potentially related work creation: [ 105.879236] kasan_save_stack+0x22/0x50 [ 105.879746] __kasan_record_aux_stack+0x8e/0xa0 [ 105.880325] __call_rcu_common.constprop.0+0x6a/0xb90 [ 105.880969] remove_vma+0x139/0x170 [ 105.881417] do_vmi_align_munmap+0xd4a/0x11f0 [ 105.881971] do_vmi_munmap+0x1f1/0x2b0 [ 105.882456] mmap_region+0x1f9/0x2660 [ 105.882938] do_mmap+0x854/0xf00 [ 105.883369] vm_mmap_pgoff+0x1a6/0x3a0 [ 105.883855] ksys_mmap_pgoff+0x3af/0x500 [ 105.884362] do_syscall_64+0x3f/0x90 [ 105.884834] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 105.885475] [ 105.885688] The buggy address belongs to the object at ffff88800b9ef740 [ 105.885688] which belongs to the cache vm_area_struct of size 168 [ 105.887164] The buggy address is located 88 bytes inside of [ 105.887164] freed 168-byte region [ffff88800b9ef740, ffff88800b9ef7e8) [ 105.888594] [ 105.888813] The buggy address belongs to the physical page: [ 105.889472] page:00000000dd7cb4a6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xb9ef [ 105.890562] memcg:ffff88800de6b701 [ 105.890989] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 105.891680] page_type: 0xffffffff() [ 105.892140] raw: 0100000000000200 ffff88800879fc80 ffffea00003a0780 dead000000000007 [ 105.893059] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800de6b701 [ 105.893958] page dumped because: kasan: bad access detected [ 105.894613] [ 105.894830] Memory state around the buggy address: [ 105.895405] ffff88800b9ef680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 105.896274] ffff88800b9ef700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 105.897116] >ffff88800b9ef780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 105.897960] ^ [ 105.898450] ffff88800b9ef800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 105.899304] ffff88800b9ef880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 105.900147] ================================================================== [ 105.901201] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 108.589224] BUG: Bad rss-counter state mm:000000004bacf1ef type:MM_FILEPAGES val:33 [ 108.589929] BUG: Bad rss-counter state mm:000000004bacf1ef type:MM_ANONPAGES val:22 [ 109.081719] BUG: Bad rss-counter state mm:000000008e567d3b type:MM_FILEPAGES val:33 [ 109.082598] BUG: Bad rss-counter state mm:000000008e567d3b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:17856' (ECDSA) to the list of known hosts. 2023/06/19 17:13:07 fuzzer started 2023/06/19 17:13:08 dialing manager at localhost:44161 2023/06/19 17:13:08 checking machine... 2023/06/19 17:13:08 checking revisions... [ 109.804931] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:13:08 testing simple program... [ 109.865091] cgroup: Unknown subsys name 'net' [ 109.903890] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:11:52 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff8661f0c8 RCX=0000000000000001 RDX=1ffff1100d9c135e RSI=ffffffff85407f20 RDI=ffffffff8661f0c8 RBP=ffffffff8661f0c8 RSP=ffff88806ce09a40 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=ffffffff85d3bed7 R11=00000000000b5420 R12=ffff88806ce09b60 R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff88800dcf51b0 RIP=ffffffff811fc6f7 RFL=00000292 [--S-A--] 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 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=00007f234cb84000 CR3=000000000e1d2000 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=2037303a33313a3731203931206e754a XMM01=6964206465766965636552203a5d3033 XMM02=6f63736964203a31313a303033313520 XMM03=7266207463656e6e6f63736964206465 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037303a33313a3731203931 XMM08=3d656e696c646d632022656369767265 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=00007fba77e866d0 CR3=0000000013a96000 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=4ef0e9515e92e18a6640c95806aaa9be XMM02=ec2efd57dc4c00df0000000000128d98 XMM03=ca2b59b4b9ce611e0000000000128e68 XMM04=285d8f5ae8585db900000000000ae988 XMM05=4edf7388c64eba94000000000013ebd8 XMM06=c291bd5c70af25b9000000000013d658 XMM07=fb795ef6d6577056000000000012ca50 XMM08=2c67c8bc2e329bc30000000000128e08 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000