[ 41.655022] BUG: Bad rss-counter state mm:0000000089f2f3e7 type:MM_FILEPAGES val:33 [ 41.656201] BUG: Bad rss-counter state mm:0000000089f2f3e7 type:MM_ANONPAGES val:22 [ 41.812428] ================================================================== [ 41.813413] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 41.814390] Read of size 8 at addr ffff88801bc656b0 by task sshd/218 [ 41.815207] [ 41.815424] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 41.816281] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 41.817257] Call Trace: [ 41.817581] [ 41.817864] dump_stack_lvl+0x91/0xf0 [ 41.818357] print_report+0xcc/0x620 [ 41.818888] ? __virt_addr_valid+0x102/0x340 [ 41.819448] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.820068] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.820681] kasan_report+0xbe/0xf0 [ 41.821164] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.821781] vma_interval_tree_remove+0xc75/0xec0 [ 41.822390] vma_prepare+0xc54/0x11a0 [ 41.822928] __split_vma+0x5af/0x950 [ 41.823405] ? __pfx___split_vma+0x10/0x10 [ 41.823951] ? find_held_lock+0x2c/0x110 [ 41.824517] do_vmi_align_munmap+0x2ba/0x11f0 [ 41.825109] ? lock_is_held_type+0x9f/0x120 [ 41.825657] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 41.826296] ? mtree_range_walk+0x632/0x900 [ 41.826901] ? mas_walk+0x5c7/0x7c0 [ 41.827379] do_vmi_munmap+0x1f1/0x2b0 [ 41.827872] mmap_region+0x1f9/0x2660 [ 41.828365] ? vm_mmap_pgoff+0x15c/0x3a0 [ 41.828884] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 41.829607] ? __pfx_lock_acquire+0x10/0x10 [ 41.830154] ? __pfx_mmap_region+0x10/0x10 [ 41.830738] ? security_mmap_addr+0x7d/0xa0 [ 41.831280] ? get_unmapped_area+0x1f5/0x3f0 [ 41.831842] do_mmap+0x854/0xf00 [ 41.832284] vm_mmap_pgoff+0x1a6/0x3a0 [ 41.832795] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 41.833376] ksys_mmap_pgoff+0x3af/0x500 [ 41.833888] do_syscall_64+0x3f/0x90 [ 41.834370] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.835055] RIP: 0033:0x7fa8a13cfd82 [ 41.835519] 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 [ 41.837690] RSP: 002b:00007ffd04bb3b98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 41.838616] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa8a13cfd82 [ 41.839470] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa8a0809000 [ 41.840324] RBP: 00007fa8a0809000 R08: 0000000000000009 R09: 0000000000001000 [ 41.841207] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559e3f57ff60 [ 41.842077] R13: 00007ffd04bb3bb0 R14: 00007ffd04bb3be0 R15: 00007ffd04bb3f40 [ 41.842987] [ 41.843286] [ 41.843499] Allocated by task 209: [ 41.843932] kasan_save_stack+0x22/0x50 [ 41.844446] kasan_set_track+0x25/0x30 [ 41.844963] __kasan_slab_alloc+0x59/0x70 [ 41.845513] kmem_cache_alloc+0x16b/0x370 [ 41.846043] vm_area_dup+0x20/0x160 [ 41.846511] __split_vma+0x170/0x950 [ 41.847014] split_vma+0xc6/0x110 [ 41.847456] mprotect_fixup+0x8d2/0xb30 [ 41.847980] do_mprotect_pkey+0x87e/0xd40 [ 41.848507] __x64_sys_mprotect+0x78/0xc0 [ 41.849029] do_syscall_64+0x3f/0x90 [ 41.849522] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.850184] [ 41.850406] Freed by task 209: [ 41.850832] kasan_save_stack+0x22/0x50 [ 41.851347] kasan_set_track+0x25/0x30 [ 41.851849] kasan_save_free_info+0x2b/0x50 [ 41.852400] __kasan_slab_free+0x10a/0x190 [ 41.852941] kmem_cache_free+0x10d/0x4d0 [ 41.853458] rcu_core+0x8c8/0x2860 [ 41.853908] __do_softirq+0x1b7/0x7d4 [ 41.854397] [ 41.854657] Last potentially related work creation: [ 41.855250] kasan_save_stack+0x22/0x50 [ 41.855765] __kasan_record_aux_stack+0x8e/0xa0 [ 41.856352] __call_rcu_common.constprop.0+0x6a/0xb90 [ 41.857015] remove_vma+0x139/0x170 [ 41.857476] do_vmi_align_munmap+0xd4a/0x11f0 [ 41.858056] do_vmi_munmap+0x1f1/0x2b0 [ 41.858567] __vm_munmap+0x138/0x3a0 [ 41.859069] __x64_sys_munmap+0x59/0x80 [ 41.859582] do_syscall_64+0x3f/0x90 [ 41.860063] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.860717] [ 41.860931] The buggy address belongs to the object at ffff88801bc65658 [ 41.860931] which belongs to the cache vm_area_struct of size 168 [ 41.862415] The buggy address is located 88 bytes inside of [ 41.862415] freed 168-byte region [ffff88801bc65658, ffff88801bc65700) [ 41.863855] [ 41.864074] The buggy address belongs to the physical page: [ 41.864743] page:000000002c9f6213 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1bc65 [ 41.865840] memcg:ffff88801bc56101 [ 41.866269] flags: 0x100000000000200(slab|node=0|zone=1) [ 41.866963] page_type: 0xffffffff() [ 41.867419] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 41.868347] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801bc56101 [ 41.869256] page dumped because: kasan: bad access detected [ 41.869923] [ 41.870143] Memory state around the buggy address: [ 41.870760] ffff88801bc65580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 41.871619] ffff88801bc65600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 41.872483] >ffff88801bc65680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 41.873332] ^ [ 41.873916] ffff88801bc65700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 41.874806] ffff88801bc65780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 41.875663] ================================================================== [ 41.876692] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 43.863339] BUG: Bad rss-counter state mm:00000000d13b935c type:MM_FILEPAGES val:33 [ 43.864875] BUG: Bad rss-counter state mm:00000000d13b935c type:MM_ANONPAGES val:22 [ 44.348665] BUG: Bad rss-counter state mm:00000000dae96bf6 type:MM_FILEPAGES val:33 [ 44.349718] BUG: Bad rss-counter state mm:00000000dae96bf6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:26675' (ECDSA) to the list of known hosts. 2023/06/20 03:54:10 fuzzer started 2023/06/20 03:54:10 dialing manager at localhost:44161 2023/06/20 03:54:10 checking machine... 2023/06/20 03:54:10 checking revisions... [ 45.099559] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:54:11 testing simple program... [ 45.147019] cgroup: Unknown subsys name 'net' [ 45.184375] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:53:53 Registers: info registers vcpu 0 RAX=ffff88806ce40d00 RBX=0000000000000cc0 RCX=ffffffff812d869a RDX=dffffc0000000000 RSI=0000000000000cc0 RDI=00000000001aeb00 RBP=ffff8880147f7d58 RSP=ffff8880147f7d10 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000000 R12=ffff8880087b63c0 R13=0000000000000000 R14=0000000000000000 R15=ffffffff818953b0 RIP=ffffffff81807e24 RFL=00000286 [--S--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 00007f892a34e900 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=00007f89297c7c40 CR3=000000000cb3a000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=d6d32a86b0a71fe400000000000ae988 XMM05=e351a8f1fe2f283e0000000000134278 XMM06=751b9502027dc0b90000000000132dc0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000002 RBX=ffff88806cf09a98 RCX=ffffffff8609fb01 RDX=1ffff1100d9e1353 RSI=0000000000000000 RDI=ffff88806cf09a98 RBP=ffff88806cf09b30 RSP=ffff88806cf09a80 R8 =ffffffff8609fb08 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=000000000000792d R12=ffff88806cf09b60 R13=0000000000000000 R14=ffff888016cb1b40 R15=ffff88801a3db8d0 RIP=ffffffff81130368 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 00007fe0c534f700 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=00007fb6cfe3f618 CR3=000000000e04a000 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=2030313a34353a3330203032206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030313a34353a3330203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000