syzkaller login: [ 31.048820] BUG: Bad rss-counter state mm:0000000074304e54 type:MM_FILEPAGES val:33 [ 31.050020] BUG: Bad rss-counter state mm:0000000074304e54 type:MM_ANONPAGES val:22 [ 31.087311] ================================================================== [ 31.088294] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.089231] Read of size 8 at addr ffff888017c22228 by task sshd/221 [ 31.090015] [ 31.090229] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.091100] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.092092] Call Trace: [ 31.092438] [ 31.092723] dump_stack_lvl+0x91/0xf0 [ 31.093217] print_report+0xcc/0x620 [ 31.093701] ? __virt_addr_valid+0x102/0x340 [ 31.094251] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.094866] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.095487] kasan_report+0xbe/0xf0 [ 31.095965] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.096623] vma_interval_tree_remove+0xc75/0xec0 [ 31.097214] vma_prepare+0xc54/0x11a0 [ 31.097704] __split_vma+0x5af/0x950 [ 31.098174] ? __pfx___split_vma+0x10/0x10 [ 31.098714] ? find_held_lock+0x2c/0x110 [ 31.099234] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.099815] ? lock_is_held_type+0x9f/0x120 [ 31.100375] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.100993] ? mtree_range_walk+0x632/0x900 [ 31.101564] ? mas_walk+0x5c7/0x7c0 [ 31.102042] do_vmi_munmap+0x1f1/0x2b0 [ 31.102530] mmap_region+0x1f9/0x2660 [ 31.103022] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.103527] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.104274] ? __pfx_lock_acquire+0x10/0x10 [ 31.104830] ? __pfx_mmap_region+0x10/0x10 [ 31.105362] ? security_mmap_addr+0x7d/0xa0 [ 31.105906] ? get_unmapped_area+0x1f5/0x3f0 [ 31.106456] do_mmap+0x854/0xf00 [ 31.106905] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.107398] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.107978] ksys_mmap_pgoff+0x3af/0x500 [ 31.108504] do_syscall_64+0x3f/0x90 [ 31.109001] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.109649] RIP: 0033:0x7f2613099d82 [ 31.110120] 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 [ 31.112286] RSP: 002b:00007ffd822c2f88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.113200] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2613099d82 [ 31.114064] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f26124d3000 [ 31.115024] RBP: 00007f26124d3000 R08: 0000000000000009 R09: 0000000000001000 [ 31.115923] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fd3eb5cec0 [ 31.116789] R13: 00007ffd822c2fa0 R14: 00007ffd822c2fd0 R15: 00007ffd822c3330 [ 31.117703] [ 31.118028] [ 31.118246] Allocated by task 214: [ 31.118671] kasan_save_stack+0x22/0x50 [ 31.119181] kasan_set_track+0x25/0x30 [ 31.119676] __kasan_slab_alloc+0x59/0x70 [ 31.120231] kmem_cache_alloc+0x16b/0x370 [ 31.120746] vm_area_dup+0x20/0x160 [ 31.121215] __split_vma+0x170/0x950 [ 31.121685] split_vma+0xc6/0x110 [ 31.122137] mprotect_fixup+0x8d2/0xb30 [ 31.122640] do_mprotect_pkey+0x87e/0xd40 [ 31.123168] __x64_sys_mprotect+0x78/0xc0 [ 31.123685] do_syscall_64+0x3f/0x90 [ 31.124186] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.124838] [ 31.125053] Freed by task 204: [ 31.125457] kasan_save_stack+0x22/0x50 [ 31.125965] kasan_set_track+0x25/0x30 [ 31.126484] kasan_save_free_info+0x2b/0x50 [ 31.127014] __kasan_slab_free+0x10a/0x190 [ 31.127558] kmem_cache_free+0x10d/0x4d0 [ 31.128067] rcu_core+0x8c8/0x2860 [ 31.128553] __do_softirq+0x1b7/0x7d4 [ 31.129037] [ 31.129262] Last potentially related work creation: [ 31.129846] kasan_save_stack+0x22/0x50 [ 31.130367] __kasan_record_aux_stack+0x8e/0xa0 [ 31.130943] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.131608] remove_vma+0x139/0x170 [ 31.132059] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.132642] do_vmi_munmap+0x1f1/0x2b0 [ 31.133134] __vm_munmap+0x138/0x3a0 [ 31.133620] __x64_sys_munmap+0x59/0x80 [ 31.134121] do_syscall_64+0x3f/0x90 [ 31.134614] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.135260] [ 31.135484] The buggy address belongs to the object at ffff888017c221d0 [ 31.135484] which belongs to the cache vm_area_struct of size 168 [ 31.136967] The buggy address is located 88 bytes inside of [ 31.136967] freed 168-byte region [ffff888017c221d0, ffff888017c22278) [ 31.138381] [ 31.138606] The buggy address belongs to the physical page: [ 31.139273] page:00000000bcc3e941 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x17c22 [ 31.140397] memcg:ffff8880169f5d01 [ 31.140840] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.141493] page_type: 0xffffffff() [ 31.141947] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.142882] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880169f5d01 [ 31.143796] page dumped because: kasan: bad access detected [ 31.144463] [ 31.144693] Memory state around the buggy address: [ 31.145274] ffff888017c22100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.146146] ffff888017c22180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.147022] >ffff888017c22200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.147900] ^ [ 31.148467] ffff888017c22280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.149351] ffff888017c22300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.150211] ================================================================== [ 31.151433] Disabling lock debugging due to kernel taint [ 33.090144] BUG: Bad rss-counter state mm:000000000da59df8 type:MM_FILEPAGES val:33 [ 33.091330] BUG: Bad rss-counter state mm:000000000da59df8 type:MM_ANONPAGES val:22 [ 33.549276] BUG: Bad rss-counter state mm:00000000524ba524 type:MM_FILEPAGES val:33 [ 33.550255] BUG: Bad rss-counter state mm:00000000524ba524 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:16167' (ECDSA) to the list of known hosts. 2023/06/21 05:44:54 fuzzer started 2023/06/21 05:44:55 dialing manager at localhost:36067 2023/06/21 05:44:55 checking machine... 2023/06/21 05:44:55 checking revisions... [ 34.210612] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:44:55 testing simple program... [ 34.273413] cgroup: Unknown subsys name 'net' [ 34.315500] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:44:54 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=fffffffffffff000 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffea00005bf480 RDI=ffff888018ba0910 RBP=0000000000001000 RSP=ffff8880147d7a28 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6d53 R12=dffffc0000000000 R13=ffffea00005bf480 R14=ffff888018ba0910 R15=0000000000408c40 RIP=ffffffff8196de84 RFL=00000287 [--S--PC] 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 00007fa607487900 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=00007fa6069a4038 CR3=000000000d790000 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=0000000000119018b3285ca56c489dff XMM01=00000000001191c8d59e07bde36eea69 XMM02=00000000001192f0ec2efd57dc4c00df XMM03=0000000000120ae8a85690af9a1aeecf XMM04=06bd06f722a313f900000000000ae988 XMM05=e4cb8bb95a7664b600000000001309b8 XMM06=c291bd5c70af25b90000000000130840 XMM07=e042d86d42eb936e0000000000120d68 XMM08=a85690af9a1aeecf0000000000119350 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff1100204a01c RBX=ffff8880102500d8 RCX=0000000000000000 RDX=ffff88800e4cd1c0 RSI=ffffffff81f35b67 RDI=ffff8880102500e0 RBP=dffffc0000000000 RSP=ffff888016567960 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=000000001371c348 R13=0000000000000000 R14=ffff888016567c20 R15=0000000000000000 RIP=ffffffff81f35b76 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 00007fd7c3adc900 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=00007ffe5d2a7000 CR3=000000000dc8a000 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