[ 30.202591] BUG: Bad rss-counter state mm:00000000c2d5dd4b type:MM_FILEPAGES val:33 [ 30.203445] BUG: Bad rss-counter state mm:00000000c2d5dd4b type:MM_ANONPAGES val:22 [ 30.337891] ================================================================== [ 30.338666] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.339484] Read of size 8 at addr ffff88801a3f2228 by task sshd/218 [ 30.340165] [ 30.340351] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.341123] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.342120] Call Trace: [ 30.342397] [ 30.342635] dump_stack_lvl+0x91/0xf0 [ 30.343028] print_report+0xcc/0x620 [ 30.343418] ? __virt_addr_valid+0x102/0x340 [ 30.343856] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.344648] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.345622] kasan_report+0xbe/0xf0 [ 30.346350] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.347293] vma_interval_tree_remove+0xc75/0xec0 [ 30.348220] vma_prepare+0xc54/0x11a0 [ 30.348885] __split_vma+0x5af/0x950 [ 30.349410] ? __pfx___split_vma+0x10/0x10 [ 30.350094] ? find_held_lock+0x2c/0x110 [ 30.350716] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.351320] ? lock_is_held_type+0x9f/0x120 [ 30.351891] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.352563] ? mtree_range_walk+0x632/0x900 [ 30.353155] ? mas_walk+0x5c7/0x7c0 [ 30.353629] do_vmi_munmap+0x1f1/0x2b0 [ 30.354120] mmap_region+0x1f9/0x2660 [ 30.354610] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.355120] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.355838] ? __pfx_lock_acquire+0x10/0x10 [ 30.356365] ? __pfx_mmap_region+0x10/0x10 [ 30.356910] ? security_mmap_addr+0x7d/0xa0 [ 30.357440] ? get_unmapped_area+0x1f5/0x3f0 [ 30.357984] do_mmap+0x854/0xf00 [ 30.358429] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.358925] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.359487] ksys_mmap_pgoff+0x3af/0x500 [ 30.359992] do_syscall_64+0x3f/0x90 [ 30.360480] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.361129] RIP: 0033:0x7f9868285d82 [ 30.361586] 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 [ 30.363730] RSP: 002b:00007ffef57bd088 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.364658] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9868285d82 [ 30.365514] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f98676bf000 [ 30.366367] RBP: 00007f98676bf000 R08: 0000000000000009 R09: 0000000000001000 [ 30.367225] R10: 0000000000000812 R11: 0000000000000206 R12: 000056483d445ec0 [ 30.368074] R13: 00007ffef57bd0a0 R14: 00007ffef57bd0d0 R15: 00007ffef57bd430 [ 30.368942] [ 30.369235] [ 30.369453] Allocated by task 208: [ 30.369879] kasan_save_stack+0x22/0x50 [ 30.370384] kasan_set_track+0x25/0x30 [ 30.370881] __kasan_slab_alloc+0x59/0x70 [ 30.371415] kmem_cache_alloc+0x16b/0x370 [ 30.371934] vm_area_dup+0x20/0x160 [ 30.372393] __split_vma+0x170/0x950 [ 30.372872] split_vma+0xc6/0x110 [ 30.373317] mprotect_fixup+0x8d2/0xb30 [ 30.373820] do_mprotect_pkey+0x87e/0xd40 [ 30.374341] __x64_sys_mprotect+0x78/0xc0 [ 30.374864] do_syscall_64+0x3f/0x90 [ 30.375337] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.375987] [ 30.376202] Freed by task 13: [ 30.376607] kasan_save_stack+0x22/0x50 [ 30.377113] kasan_set_track+0x25/0x30 [ 30.377610] kasan_save_free_info+0x2b/0x50 [ 30.378144] __kasan_slab_free+0x10a/0x190 [ 30.378676] kmem_cache_free+0x10d/0x4d0 [ 30.379185] rcu_core+0x8c8/0x2860 [ 30.379634] __do_softirq+0x1b7/0x7d4 [ 30.380111] [ 30.380326] Last potentially related work creation: [ 30.380923] kasan_save_stack+0x22/0x50 [ 30.381439] __kasan_record_aux_stack+0x8e/0xa0 [ 30.382012] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.382738] remove_vma+0x139/0x170 [ 30.383192] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.383748] do_vmi_munmap+0x1f1/0x2b0 [ 30.384244] __vm_munmap+0x138/0x3a0 [ 30.384732] __x64_sys_munmap+0x59/0x80 [ 30.385234] do_syscall_64+0x3f/0x90 [ 30.385709] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.386349] [ 30.386569] The buggy address belongs to the object at ffff88801a3f21d0 [ 30.386569] which belongs to the cache vm_area_struct of size 168 [ 30.388036] The buggy address is located 88 bytes inside of [ 30.388036] freed 168-byte region [ffff88801a3f21d0, ffff88801a3f2278) [ 30.389451] [ 30.389670] The buggy address belongs to the physical page: [ 30.390336] page:000000001950c187 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a3f2 [ 30.391444] memcg:ffff88801a3f6301 [ 30.391872] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.392530] page_type: 0xffffffff() [ 30.392984] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.393914] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a3f6301 [ 30.394851] page dumped because: kasan: bad access detected [ 30.395537] [ 30.395753] Memory state around the buggy address: [ 30.396327] ffff88801a3f2100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.397203] ffff88801a3f2180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.398064] >ffff88801a3f2200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.398912] ^ [ 30.399470] ffff88801a3f2280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.400329] ffff88801a3f2300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.401185] ================================================================== [ 30.402190] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 32.589611] BUG: Bad rss-counter state mm:00000000e47217a0 type:MM_FILEPAGES val:33 [ 32.590533] BUG: Bad rss-counter state mm:00000000e47217a0 type:MM_ANONPAGES val:22 [ 33.013808] BUG: Bad rss-counter state mm:00000000e9dce7d1 type:MM_FILEPAGES val:33 [ 33.014859] BUG: Bad rss-counter state mm:00000000e9dce7d1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:58936' (ECDSA) to the list of known hosts. 2023/06/21 06:32:54 fuzzer started 2023/06/21 06:32:54 dialing manager at localhost:36067 2023/06/21 06:32:54 checking machine... 2023/06/21 06:32:54 checking revisions... [ 33.796192] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:32:54 testing simple program... [ 33.849619] cgroup: Unknown subsys name 'net' [ 33.907262] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:32:54 Registers: info registers vcpu 0 RAX=0000000080010001 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff88800f420000 RSI=0000000000000000 RDI=0000000000000000 RBP=0000000000000000 RSP=ffff88806ce09ea8 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=0000000000000000 R13=7fffffffffffffff R14=ffff88806ce2b940 R15=0000000000000000 RIP=ffffffff814c0404 RFL=00000046 [---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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f4645bdd900 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=00007f4645055ad0 CR3=0000000008c60000 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=d28c9734da47d89200000000000ae988 XMM05=c06f3a506cf821d10000000000131d68 XMM06=bdf2e299e47b49d500000000001307e8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=00000000000002b3 RBX=0000000000000001 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000001 RDI=0000559aad9d68c0 RBP=0000559aad9d68c0 RSP=00007f0e4ecb2a28 R8 =0000000000000001 R9 =0000000000000001 R10=0000000000000000 R11=0000000000000000 R12=0000000000000001 R13=00007f0e4ecb2a70 R14=0000000000000001 R15=0000559aad9d6e30 RIP=0000559aac9362e7 RFL=00000202 [-------] 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 00007f0e4ecb3700 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=00007ffb2768b618 CR3=000000000e3c8000 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=2033353a32333a3630203132206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033353a32333a3630203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000