[ 24.258841] BUG: Bad rss-counter state mm:00000000a46d09d7 type:MM_FILEPAGES val:33 [ 24.260093] BUG: Bad rss-counter state mm:00000000a46d09d7 type:MM_ANONPAGES val:22 [ 24.298871] ================================================================== [ 24.299812] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.300786] Read of size 8 at addr ffff8880096a5058 by task sshd/220 [ 24.301648] [ 24.301869] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.302731] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.303716] Call Trace: [ 24.304053] [ 24.304340] dump_stack_lvl+0x91/0xf0 [ 24.304833] print_report+0xcc/0x620 [ 24.305335] ? __virt_addr_valid+0x102/0x340 [ 24.305884] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.306507] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.307134] kasan_report+0xbe/0xf0 [ 24.307613] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.308254] vma_interval_tree_remove+0xc75/0xec0 [ 24.308869] vma_prepare+0xc54/0x11a0 [ 24.309349] __split_vma+0x5af/0x950 [ 24.309827] ? __pfx___split_vma+0x10/0x10 [ 24.310363] ? find_held_lock+0x2c/0x110 [ 24.310885] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.311447] ? lock_is_held_type+0x9f/0x120 [ 24.312017] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.312631] ? mtree_range_walk+0x632/0x900 [ 24.313187] ? mas_walk+0x5c7/0x7c0 [ 24.313661] do_vmi_munmap+0x1f1/0x2b0 [ 24.314155] mmap_region+0x1f9/0x2660 [ 24.314647] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.315173] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.315904] ? __pfx_lock_acquire+0x10/0x10 [ 24.316438] ? __pfx_mmap_region+0x10/0x10 [ 24.316981] ? security_mmap_addr+0x7d/0xa0 [ 24.317534] ? get_unmapped_area+0x1f5/0x3f0 [ 24.318091] do_mmap+0x854/0xf00 [ 24.318531] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.319031] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.319602] ksys_mmap_pgoff+0x3af/0x500 [ 24.320133] do_syscall_64+0x3f/0x90 [ 24.320617] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.321278] RIP: 0033:0x7fa3e2964d82 [ 24.321752] 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 [ 24.323919] RSP: 002b:00007ffc00e41ae8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.324834] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa3e2964d82 [ 24.325700] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa3e1d9e000 [ 24.326560] RBP: 00007fa3e1d9e000 R08: 0000000000000009 R09: 0000000000001000 [ 24.327419] R10: 0000000000000812 R11: 0000000000000206 R12: 00005600389e0f70 [ 24.328289] R13: 00007ffc00e41b00 R14: 00007ffc00e41b30 R15: 00007ffc00e41e90 [ 24.329165] [ 24.329463] [ 24.329684] Allocated by task 213: [ 24.330118] kasan_save_stack+0x22/0x50 [ 24.330636] kasan_set_track+0x25/0x30 [ 24.331142] __kasan_slab_alloc+0x59/0x70 [ 24.331678] kmem_cache_alloc+0x16b/0x370 [ 24.332217] vm_area_dup+0x20/0x160 [ 24.332673] __split_vma+0x170/0x950 [ 24.333142] split_vma+0xc6/0x110 [ 24.333582] mprotect_fixup+0x8d2/0xb30 [ 24.334086] do_mprotect_pkey+0x87e/0xd40 [ 24.334615] __x64_sys_mprotect+0x78/0xc0 [ 24.335137] do_syscall_64+0x3f/0x90 [ 24.335612] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.336282] [ 24.336499] Freed by task 213: [ 24.336889] kasan_save_stack+0x22/0x50 [ 24.337394] kasan_set_track+0x25/0x30 [ 24.337891] kasan_save_free_info+0x2b/0x50 [ 24.338436] __kasan_slab_free+0x10a/0x190 [ 24.338966] kmem_cache_free+0x10d/0x4d0 [ 24.339474] rcu_core+0x8c8/0x2860 [ 24.339931] __do_softirq+0x1b7/0x7d4 [ 24.340416] [ 24.340630] Last potentially related work creation: [ 24.341247] kasan_save_stack+0x22/0x50 [ 24.341751] __kasan_record_aux_stack+0x8e/0xa0 [ 24.342339] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.342987] remove_vma+0x139/0x170 [ 24.343439] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.344017] do_vmi_munmap+0x1f1/0x2b0 [ 24.344511] __vm_munmap+0x138/0x3a0 [ 24.345017] __x64_sys_munmap+0x59/0x80 [ 24.345522] do_syscall_64+0x3f/0x90 [ 24.346003] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.346651] [ 24.346866] Second to last potentially related work creation: [ 24.347568] kasan_save_stack+0x22/0x50 [ 24.348090] __kasan_record_aux_stack+0x8e/0xa0 [ 24.348661] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.349307] remove_vma+0x139/0x170 [ 24.349767] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.350402] do_vmi_munmap+0x1f1/0x2b0 [ 24.350944] mmap_region+0x1f9/0x2660 [ 24.351454] do_mmap+0x854/0xf00 [ 24.351897] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.352401] ksys_mmap_pgoff+0x3af/0x500 [ 24.352907] do_syscall_64+0x3f/0x90 [ 24.353380] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.354023] [ 24.354239] The buggy address belongs to the object at ffff8880096a5000 [ 24.354239] which belongs to the cache vm_area_struct of size 168 [ 24.355717] The buggy address is located 88 bytes inside of [ 24.355717] freed 168-byte region [ffff8880096a5000, ffff8880096a50a8) [ 24.357154] [ 24.357368] The buggy address belongs to the physical page: [ 24.358038] page:00000000c5918900 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x96a5 [ 24.359142] memcg:ffff88800c5f7b01 [ 24.359573] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.360233] page_type: 0xffffffff() [ 24.360690] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 24.361611] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c5f7b01 [ 24.362528] page dumped because: kasan: bad access detected [ 24.363183] [ 24.363399] Memory state around the buggy address: [ 24.364001] ffff8880096a4f00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 24.364866] ffff8880096a4f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 24.365717] >ffff8880096a5000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.366573] ^ [ 24.367308] ffff8880096a5080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 24.368177] ffff8880096a5100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.369031] ================================================================== [ 24.370113] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.460245] BUG: Bad rss-counter state mm:00000000388452c2 type:MM_FILEPAGES val:33 [ 26.461245] BUG: Bad rss-counter state mm:00000000388452c2 type:MM_ANONPAGES val:22 [ 27.026648] BUG: Bad rss-counter state mm:00000000e107ccb1 type:MM_FILEPAGES val:33 [ 27.027840] BUG: Bad rss-counter state mm:00000000e107ccb1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:28382' (ECDSA) to the list of known hosts. 2023/06/20 14:42:44 fuzzer started 2023/06/20 14:42:44 dialing manager at localhost:36067 2023/06/20 14:42:44 checking machine... 2023/06/20 14:42:44 checking revisions... [ 27.671943] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:42:44 testing simple program... [ 27.726885] cgroup: Unknown subsys name 'net' [ 27.770499] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:42:44 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=0000000000000001 RDX=1ffff110028eee9d RSI=ffffffff83635bd7 RDI=ffff8880147774e8 RBP=ffff888014777580 RSP=ffff888014777478 R8 =0000000000000001 R9 =ffff888014777528 R10=0000000000038001 R11=000000000009a9c3 R12=ffff8880147775b0 R13=0000000000000000 R14=ffff88800f6e0000 R15=ffff8880147774e8 RIP=ffffffff8113060b 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 00007f220e8fd900 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=00007f220dd73120 CR3=000000000c616000 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=e021fa0c7b7fabbc7045faadd0f0324f XMM02=000000000011a0e0eff9b2d0a8fce9cb XMM03=000000000011a1b02c67c8bc2e329bc3 XMM04=8600afc0f0e76ee500000000000ae988 XMM05=819d93a5c502a8dd00000000001335e0 XMM06=19e9129bd510f2350000000000132108 XMM07=fb795ef6d65770560000000000120fd8 XMM08=2c67c8bc2e329bc3000000000011a150 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=ffffffff813ad470 RCX=ffffffff864bbb54 RDX=1ffff11002fd4f21 RSI=0000000000000000 RDI=ffff888017ea7908 RBP=ffff888017ea7990 RSP=ffff888017ea78d8 R8 =ffffffff864bbb58 R9 =ffff888017ea7938 R10=0000000000038001 R11=00000000000b6a61 R12=ffff888017ea79c0 R13=ffff888017ea7940 R14=ffff888017ea7f58 R15=ffff888017ea78f8 RIP=ffffffff81130933 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f2e9ce8f900 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=00007fff524aa000 CR3=000000000c51c000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000