syzkaller login: [ 33.681104] BUG: Bad rss-counter state mm:0000000028cdac09 type:MM_FILEPAGES val:33 [ 33.682297] BUG: Bad rss-counter state mm:0000000028cdac09 type:MM_ANONPAGES val:22 [ 33.724611] ================================================================== [ 33.725527] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.726479] Read of size 8 at addr ffff888019aef880 by task sshd/221 [ 33.727312] [ 33.727578] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.728446] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.729447] Call Trace: [ 33.729764] [ 33.730048] dump_stack_lvl+0x91/0xf0 [ 33.730532] print_report+0xcc/0x620 [ 33.731024] ? __virt_addr_valid+0x102/0x340 [ 33.731577] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.732194] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.732816] kasan_report+0xbe/0xf0 [ 33.733294] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.733906] vma_interval_tree_remove+0xc75/0xec0 [ 33.734516] vma_prepare+0xc54/0x11a0 [ 33.734992] __split_vma+0x5af/0x950 [ 33.735466] ? __pfx___split_vma+0x10/0x10 [ 33.735998] ? find_held_lock+0x2c/0x110 [ 33.736523] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.737097] ? lock_is_held_type+0x9f/0x120 [ 33.737634] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.738243] ? mtree_range_walk+0x632/0x900 [ 33.738788] ? mas_walk+0x5c7/0x7c0 [ 33.739257] do_vmi_munmap+0x1f1/0x2b0 [ 33.739750] mmap_region+0x1f9/0x2660 [ 33.740238] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.740760] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.741500] ? __pfx_lock_acquire+0x10/0x10 [ 33.742032] ? __pfx_mmap_region+0x10/0x10 [ 33.742568] ? security_mmap_addr+0x7d/0xa0 [ 33.743131] ? get_unmapped_area+0x1f5/0x3f0 [ 33.743691] do_mmap+0x854/0xf00 [ 33.744135] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.744635] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.745232] ksys_mmap_pgoff+0x3af/0x500 [ 33.745746] do_syscall_64+0x3f/0x90 [ 33.746233] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.746874] RIP: 0033:0x7f51e0cdcd82 [ 33.747332] 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 [ 33.749463] RSP: 002b:00007ffde6555698 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.750374] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f51e0cdcd82 [ 33.751243] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f51e0116000 [ 33.752109] RBP: 00007f51e0116000 R08: 0000000000000009 R09: 0000000000001000 [ 33.752968] R10: 0000000000000812 R11: 0000000000000206 R12: 000056205a6bcf60 [ 33.753855] R13: 00007ffde65556b0 R14: 00007ffde65556e0 R15: 00007ffde6555a40 [ 33.754739] [ 33.755035] [ 33.755247] Allocated by task 214: [ 33.755677] kasan_save_stack+0x22/0x50 [ 33.756191] kasan_set_track+0x25/0x30 [ 33.756696] __kasan_slab_alloc+0x59/0x70 [ 33.757236] kmem_cache_alloc+0x16b/0x370 [ 33.757757] vm_area_dup+0x20/0x160 [ 33.758222] __split_vma+0x170/0x950 [ 33.758687] split_vma+0xc6/0x110 [ 33.759135] mprotect_fixup+0x8d2/0xb30 [ 33.759640] do_mprotect_pkey+0x87e/0xd40 [ 33.760172] __x64_sys_mprotect+0x78/0xc0 [ 33.760702] do_syscall_64+0x3f/0x90 [ 33.761191] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.761832] [ 33.762047] Freed by task 214: [ 33.762437] kasan_save_stack+0x22/0x50 [ 33.762940] kasan_set_track+0x25/0x30 [ 33.763426] kasan_save_free_info+0x2b/0x50 [ 33.763951] __kasan_slab_free+0x10a/0x190 [ 33.764478] kmem_cache_free+0x10d/0x4d0 [ 33.764984] rcu_core+0x8c8/0x2860 [ 33.765453] __do_softirq+0x1b7/0x7d4 [ 33.765932] [ 33.766145] Last potentially related work creation: [ 33.766726] kasan_save_stack+0x22/0x50 [ 33.767231] __kasan_record_aux_stack+0x8e/0xa0 [ 33.767795] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.768441] remove_vma+0x139/0x170 [ 33.768889] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.769449] do_vmi_munmap+0x1f1/0x2b0 [ 33.769933] __vm_munmap+0x138/0x3a0 [ 33.770397] __x64_sys_munmap+0x59/0x80 [ 33.770891] do_syscall_64+0x3f/0x90 [ 33.771359] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.772006] [ 33.772221] The buggy address belongs to the object at ffff888019aef828 [ 33.772221] which belongs to the cache vm_area_struct of size 168 [ 33.773677] The buggy address is located 88 bytes inside of [ 33.773677] freed 168-byte region [ffff888019aef828, ffff888019aef8d0) [ 33.775063] [ 33.775278] The buggy address belongs to the physical page: [ 33.775928] page:00000000127c54b5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19aef [ 33.777028] memcg:ffff8880095fda01 [ 33.777458] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.778103] page_type: 0xffffffff() [ 33.778547] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 33.779458] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880095fda01 [ 33.780350] page dumped because: kasan: bad access detected [ 33.781001] [ 33.781222] Memory state around the buggy address: [ 33.781797] ffff888019aef780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 33.782641] ffff888019aef800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 33.783484] >ffff888019aef880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 33.784333] ^ [ 33.784749] ffff888019aef900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.785604] ffff888019aef980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 33.786442] ================================================================== [ 33.787569] Disabling lock debugging due to kernel taint [ 36.562925] BUG: Bad rss-counter state mm:00000000b7abc3dc type:MM_FILEPAGES val:33 [ 36.563959] BUG: Bad rss-counter state mm:00000000b7abc3dc type:MM_ANONPAGES val:22 [ 37.055910] BUG: Bad rss-counter state mm:000000007ed6fbf4 type:MM_FILEPAGES val:33 [ 37.056940] BUG: Bad rss-counter state mm:000000007ed6fbf4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:18939' (ECDSA) to the list of known hosts. 2023/06/19 17:37:31 fuzzer started 2023/06/19 17:37:31 dialing manager at localhost:44161 2023/06/19 17:37:31 checking machine... 2023/06/19 17:37:31 checking revisions... [ 37.779414] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:37:31 testing simple program... [ 37.825411] cgroup: Unknown subsys name 'net' [ 37.865404] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:37:28 Registers: info registers vcpu 0 RAX=000000000000001d RBX=1ffff110028ceedb RCX=ffffffff81c5f4a3 RDX=ffff8880145eb680 RSI=0000000000000000 RDI=0000000000000004 RBP=ffff88800ff80000 RSP=ffff8880146776a0 R8 =0000000000000004 R9 =0000000000001000 R10=000000000000001d R11=00000000000b6c88 R12=0000000000000003 R13=ffff888016174c00 R14=0000000000000000 R15=0000000000001000 RIP=ffffffff814c07e0 RFL=00000212 [----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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f3900dd1900 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=00007f3900229560 CR3=000000000ec48000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=976d980282e3e95100000000000ae988 XMM05=3470a7688cd3b8e700000000001350d8 XMM06=c291bd5c70af25b90000000000133ed8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 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=0000000000000001 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=00007f555c800618 CR3=000000001951c000 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=2030333a37333a3731203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030333a37333a3731203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000