syzkaller login: [ 30.957080] BUG: Bad rss-counter state mm:000000000b5c3bae type:MM_FILEPAGES val:33 [ 30.957861] BUG: Bad rss-counter state mm:000000000b5c3bae type:MM_ANONPAGES val:22 [ 31.085832] ================================================================== [ 31.086519] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.087235] Read of size 8 at addr ffff8880169db6b0 by task sshd/221 [ 31.087858] [ 31.088021] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.088657] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.089425] Call Trace: [ 31.089668] [ 31.089993] dump_stack_lvl+0x91/0xf0 [ 31.090429] print_report+0xcc/0x620 [ 31.090782] ? __virt_addr_valid+0x102/0x340 [ 31.091220] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.091677] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.092132] kasan_report+0xbe/0xf0 [ 31.092485] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.092937] vma_interval_tree_remove+0xc75/0xec0 [ 31.093383] vma_prepare+0xc54/0x11a0 [ 31.093736] __split_vma+0x5af/0x950 [ 31.094086] ? __pfx___split_vma+0x10/0x10 [ 31.094470] ? find_held_lock+0x2c/0x110 [ 31.094862] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.095287] ? lock_is_held_type+0x9f/0x120 [ 31.095679] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.096127] ? mtree_range_walk+0x632/0x900 [ 31.096538] ? mas_walk+0x5c7/0x7c0 [ 31.096890] do_vmi_munmap+0x1f1/0x2b0 [ 31.097254] mmap_region+0x1f9/0x2660 [ 31.097606] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.097980] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.098490] ? __pfx_lock_acquire+0x10/0x10 [ 31.098875] ? __pfx_mmap_region+0x10/0x10 [ 31.099303] ? security_mmap_addr+0x7d/0xa0 [ 31.099711] ? get_unmapped_area+0x1f5/0x3f0 [ 31.100124] do_mmap+0x854/0xf00 [ 31.100459] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.100826] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.101248] ksys_mmap_pgoff+0x3af/0x500 [ 31.101637] do_syscall_64+0x3f/0x90 [ 31.101996] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.102490] RIP: 0033:0x7f8a43e96d82 [ 31.102835] 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 [ 31.104483] RSP: 002b:00007ffcab6259a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.105166] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8a43e96d82 [ 31.105809] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8a432d0000 [ 31.106458] RBP: 00007f8a432d0000 R08: 0000000000000009 R09: 0000000000001000 [ 31.107086] R10: 0000000000000812 R11: 0000000000000206 R12: 000056313cc5cf70 [ 31.107743] R13: 00007ffcab6259c0 R14: 00007ffcab6259f0 R15: 00007ffcab625d50 [ 31.108379] [ 31.108598] [ 31.108756] Allocated by task 214: [ 31.109075] kasan_save_stack+0x22/0x50 [ 31.109451] kasan_set_track+0x25/0x30 [ 31.109817] __kasan_slab_alloc+0x59/0x70 [ 31.110212] kmem_cache_alloc+0x16b/0x370 [ 31.110596] vm_area_dup+0x20/0x160 [ 31.110935] __split_vma+0x170/0x950 [ 31.111289] split_vma+0xc6/0x110 [ 31.111608] mprotect_fixup+0x8d2/0xb30 [ 31.111995] do_mprotect_pkey+0x87e/0xd40 [ 31.112381] __x64_sys_mprotect+0x78/0xc0 [ 31.112762] do_syscall_64+0x3f/0x90 [ 31.113123] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.113601] [ 31.113764] Freed by task 214: [ 31.114068] kasan_save_stack+0x22/0x50 [ 31.114440] kasan_set_track+0x25/0x30 [ 31.114807] kasan_save_free_info+0x2b/0x50 [ 31.115229] __kasan_slab_free+0x10a/0x190 [ 31.115641] kmem_cache_free+0x10d/0x4d0 [ 31.116025] rcu_core+0x8c8/0x2860 [ 31.116354] __do_softirq+0x1b7/0x7d4 [ 31.116710] [ 31.116883] Last potentially related work creation: [ 31.117312] kasan_save_stack+0x22/0x50 [ 31.117686] __kasan_record_aux_stack+0x8e/0xa0 [ 31.118118] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.118599] remove_vma+0x139/0x170 [ 31.118936] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.119363] do_vmi_munmap+0x1f1/0x2b0 [ 31.119734] __vm_munmap+0x138/0x3a0 [ 31.120086] __x64_sys_munmap+0x59/0x80 [ 31.120456] do_syscall_64+0x3f/0x90 [ 31.120811] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.121285] [ 31.121453] The buggy address belongs to the object at ffff8880169db658 [ 31.121453] which belongs to the cache vm_area_struct of size 168 [ 31.122553] The buggy address is located 88 bytes inside of [ 31.122553] freed 168-byte region [ffff8880169db658, ffff8880169db700) [ 31.123608] [ 31.123766] The buggy address belongs to the physical page: [ 31.124271] page:00000000be0cddf2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x169db [ 31.125102] memcg:ffff888019f89f01 [ 31.125425] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.125899] page_type: 0xffffffff() [ 31.126225] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.126936] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019f89f01 [ 31.127614] page dumped because: kasan: bad access detected [ 31.128071] [ 31.128227] Memory state around the buggy address: [ 31.128634] ffff8880169db580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.129219] ffff8880169db600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.129797] >ffff8880169db680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.130372] ^ [ 31.130765] ffff8880169db700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.131345] ffff8880169db780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.131911] ================================================================== [ 31.132603] Disabling lock debugging due to kernel taint [ 32.917934] BUG: Bad rss-counter state mm:000000004473e849 type:MM_FILEPAGES val:33 [ 32.918669] BUG: Bad rss-counter state mm:000000004473e849 type:MM_ANONPAGES val:22 [ 33.239725] BUG: Bad rss-counter state mm:000000007827a8d1 type:MM_FILEPAGES val:33 [ 33.240607] BUG: Bad rss-counter state mm:000000007827a8d1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:60741' (ECDSA) to the list of known hosts. 2023/06/21 09:07:05 fuzzer started 2023/06/21 09:07:05 dialing manager at localhost:36067 2023/06/21 09:07:05 checking machine... 2023/06/21 09:07:05 checking revisions... [ 33.850202] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:07:05 testing simple program... [ 33.886875] cgroup: Unknown subsys name 'net' [ 33.939504] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:07:04 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce35000 RCX=ffffffff812d86ea RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=1ffff1100d9c132e RSP=ffff88806ce09950 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b54e7 R12=ffffffff8560b640 R13=ffffffff814c8575 R14=ffffffff85652d08 R15=ffff888013f8d670 RIP=ffffffff8135b960 RFL=00000216 [----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 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=00007ffd406e2828 CR3=000000000daee000 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=2034303a37303a3930203132206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034303a37303a3930203132 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=000000000000002c RBX=000055a58e6dbb4f RCX=0000000000000030 RDX=0000000000000001 RSI=000055a58e6f83b0 RDI=000055a58e6dbb50 RBP=0000000000000000 RSP=00007fffbd62eea8 R8 =000055a58e6dbb20 R9 =0074696d7265705f R10=000055a58e6dbb20 R11=0000000000000297 R12=0000000000000008 R13=000055a58e6db350 R14=0000000000000069 R15=000055a58e6febf0 RIP=00007f1e7d5ededf RFL=00000287 [--S--PC] 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 00007f1e7d098900 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=00007f1e7d6500b0 CR3=000000001c560000 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=ffffff0000ff00000000000000000000 XMM02=00000000006f730078696e755f6d6170 XMM03=00000000006f730078696e755f6d6170 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000