syzkaller login: [ 36.478178] BUG: Bad rss-counter state mm:00000000db66c058 type:MM_FILEPAGES val:33 [ 36.479362] BUG: Bad rss-counter state mm:00000000db66c058 type:MM_ANONPAGES val:22 [ 36.519595] ================================================================== [ 36.520745] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.521915] Read of size 8 at addr ffff8880144d43f8 by task sshd/222 [ 36.522676] [ 36.522902] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.523741] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.524772] Call Trace: [ 36.525097] [ 36.525374] dump_stack_lvl+0x91/0xf0 [ 36.525847] print_report+0xcc/0x620 [ 36.526329] ? __virt_addr_valid+0x102/0x340 [ 36.526870] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.527615] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.528235] kasan_report+0xbe/0xf0 [ 36.528695] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.529320] vma_interval_tree_remove+0xc75/0xec0 [ 36.529905] vma_prepare+0xc54/0x11a0 [ 36.530386] __split_vma+0x5af/0x950 [ 36.530866] ? __pfx___split_vma+0x10/0x10 [ 36.531402] ? find_held_lock+0x2c/0x110 [ 36.531905] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.532470] ? lock_is_held_type+0x9f/0x120 [ 36.532987] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.533582] ? mtree_range_walk+0x632/0x900 [ 36.534139] ? mas_walk+0x5c7/0x7c0 [ 36.534602] do_vmi_munmap+0x1f1/0x2b0 [ 36.535101] mmap_region+0x1f9/0x2660 [ 36.535568] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.536074] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.536765] ? __pfx_lock_acquire+0x10/0x10 [ 36.537295] ? __pfx_mmap_region+0x10/0x10 [ 36.537806] ? security_mmap_addr+0x7d/0xa0 [ 36.538330] ? get_unmapped_area+0x1f5/0x3f0 [ 36.538872] do_mmap+0x854/0xf00 [ 36.539329] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.539810] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.540371] ksys_mmap_pgoff+0x3af/0x500 [ 36.540862] do_syscall_64+0x3f/0x90 [ 36.541337] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.541956] RIP: 0033:0x7f0455505d82 [ 36.542410] 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 [ 36.544523] RSP: 002b:00007ffc1db13148 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.545417] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0455505d82 [ 36.546237] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f045493f000 [ 36.547074] RBP: 00007f045493f000 R08: 0000000000000009 R09: 0000000000001000 [ 36.547891] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564337274f70 [ 36.548715] R13: 00007ffc1db13160 R14: 00007ffc1db13190 R15: 00007ffc1db134f0 [ 36.549575] [ 36.549857] [ 36.550077] Allocated by task 215: [ 36.550492] kasan_save_stack+0x22/0x50 [ 36.550996] kasan_set_track+0x25/0x30 [ 36.551487] __kasan_slab_alloc+0x59/0x70 [ 36.551994] kmem_cache_alloc+0x16b/0x370 [ 36.552502] vm_area_dup+0x20/0x160 [ 36.552938] __split_vma+0x170/0x950 [ 36.553403] split_vma+0xc6/0x110 [ 36.553828] mprotect_fixup+0x8d2/0xb30 [ 36.554337] do_mprotect_pkey+0x87e/0xd40 [ 36.554850] __x64_sys_mprotect+0x78/0xc0 [ 36.555369] do_syscall_64+0x3f/0x90 [ 36.555825] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.556460] [ 36.556670] Freed by task 215: [ 36.557062] kasan_save_stack+0x22/0x50 [ 36.557552] kasan_set_track+0x25/0x30 [ 36.558032] kasan_save_free_info+0x2b/0x50 [ 36.558562] __kasan_slab_free+0x10a/0x190 [ 36.559125] kmem_cache_free+0x10d/0x4d0 [ 36.559618] rcu_core+0x8c8/0x2860 [ 36.560067] __do_softirq+0x1b7/0x7d4 [ 36.560527] [ 36.560734] Last potentially related work creation: [ 36.561308] kasan_save_stack+0x22/0x50 [ 36.561795] __kasan_record_aux_stack+0x8e/0xa0 [ 36.562364] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.562991] remove_vma+0x139/0x170 [ 36.563439] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.563979] do_vmi_munmap+0x1f1/0x2b0 [ 36.564474] __vm_munmap+0x138/0x3a0 [ 36.564928] __x64_sys_munmap+0x59/0x80 [ 36.565430] do_syscall_64+0x3f/0x90 [ 36.565891] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.566524] [ 36.566735] The buggy address belongs to the object at ffff8880144d43a0 [ 36.566735] which belongs to the cache vm_area_struct of size 168 [ 36.568197] The buggy address is located 88 bytes inside of [ 36.568197] freed 168-byte region [ffff8880144d43a0, ffff8880144d4448) [ 36.569571] [ 36.569780] The buggy address belongs to the physical page: [ 36.570432] page:000000009e30e3ed refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x144d4 [ 36.571503] memcg:ffff88801a36e301 [ 36.571931] flags: 0x100000000000200(slab|node=0|zone=1) [ 36.572582] page_type: 0xffffffff() [ 36.573036] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 36.573956] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a36e301 [ 36.574906] page dumped because: kasan: bad access detected [ 36.575582] [ 36.575797] Memory state around the buggy address: [ 36.576392] ffff8880144d4280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 36.577252] ffff8880144d4300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 36.578102] >ffff8880144d4380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 36.578963] ^ [ 36.579819] ffff8880144d4400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 36.580679] ffff8880144d4480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.581534] ================================================================== [ 36.582576] Disabling lock debugging due to kernel taint [ 38.499124] BUG: Bad rss-counter state mm:00000000026ecfad type:MM_FILEPAGES val:33 [ 38.500099] BUG: Bad rss-counter state mm:00000000026ecfad type:MM_ANONPAGES val:22 [ 38.966224] BUG: Bad rss-counter state mm:00000000bef9ecd8 type:MM_FILEPAGES val:33 [ 38.967258] BUG: Bad rss-counter state mm:00000000bef9ecd8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:3053' (ECDSA) to the list of known hosts. 2023/06/19 17:22:31 fuzzer started 2023/06/19 17:22:31 dialing manager at localhost:44161 2023/06/19 17:22:31 checking machine... 2023/06/19 17:22:31 checking revisions... [ 39.646348] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:22:32 testing simple program... [ 39.696688] cgroup: Unknown subsys name 'net' [ 39.757789] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:22:26 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007f0c2b86c2f0 CR3=000000000c60a000 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=f3a4706c8e7acdb3cc435f1d41d6e11c XMM02=000000000011d058ec2efd57dc4c00df XMM03=00000000001244e04b75409b231e86a6 XMM04=fc331277ffd439d100000000000ae988 XMM05=59d5b690e0af863b00000000001340f8 XMM06=00c3ffa147b8d8570000000000133f80 XMM07=e042d86d42eb936e0000000000124760 XMM08=4b75409b231e86a6000000000011d0b8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=00007ffeb76c0928 RBX=00007fbc1fe09060 RCX=00007ffeb76c0840 RDX=0000000000000022 RSI=0000000000000000 RDI=00007ffeb76c09f8 RBP=00007ffeb76c0910 RSP=00007ffeb76c0820 R8 =000000000000001a R9 =00007ffeb76c0ab0 R10=000000000000002c R11=0000000200000000 R12=0000000000000000 R13=0000000000000000 R14=000000000000001a R15=00007ffeb76c0820 RIP=00007fbc208daf24 RFL=00000246 [---Z-P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fbc1fd4d900 00000000 00000000 GS =0000 0000000000000000 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=0000563a52408c8c CR3=000000000e0e4000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000