general protection fault, probably for non-canonical address 0xdffffc0000000001: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f] CPU: 1 PID: 17349 Comm: syz-executor.3 Not tainted 6.7.0-rc6-next-20231222-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023 RIP: 0010:scatterwalk_start include/crypto/scatterwalk.h:63 [inline] RIP: 0010:scatterwalk_pagedone include/crypto/scatterwalk.h:83 [inline] RIP: 0010:scatterwalk_pagedone include/crypto/scatterwalk.h:72 [inline] RIP: 0010:scatterwalk_copychunks+0x3e0/0x560 crypto/scatterwalk.c:50 Code: f0 48 c1 e8 03 80 3c 08 00 0f 85 81 01 00 00 49 8d 44 24 08 4d 89 26 48 bf 00 00 00 00 00 fc ff df 48 89 44 24 10 48 c1 e8 03 <0f> b6 04 38 84 c0 74 08 3c 03 0f 8e 47 01 00 00 48 8b 44 24 08 41 RSP: 0018:ffffc900031becf0 EFLAGS: 00010202 RAX: 0000000000000001 RBX: 0000000000000000 RCX: dffffc0000000000 RDX: 0000000000040000 RSI: ffffffff8465df74 RDI: dffffc0000000000 RBP: 0000000000001000 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000002 R11: 72f16952bac14988 R12: 0000000000000000 R13: 0000000000000014 R14: ffffc900031bed88 R15: 0000000000001000 FS: 00007ffa6dd9c6c0(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020428000 CR3: 000000004bfa3000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: scatterwalk_map_and_copy+0x151/0x1d0 crypto/scatterwalk.c:67 scomp_acomp_comp_decomp+0x3a3/0x780 crypto/scompress.c:149 crypto_acomp_compress include/crypto/acompress.h:302 [inline] zswap_store+0x98b/0x2430 mm/zswap.c:1666 swap_writepage+0x8e/0x220 mm/page_io.c:198 pageout+0x399/0x9e0 mm/vmscan.c:656 shrink_folio_list+0x2f47/0x3ea0 mm/vmscan.c:1319 reclaim_folio_list+0xe4/0x3a0 mm/vmscan.c:2104 reclaim_pages+0x483/0x6a0 mm/vmscan.c:2140 madvise_cold_or_pageout_pte_range+0x129e/0x1f70 mm/madvise.c:526 walk_pmd_range mm/pagewalk.c:143 [inline] walk_pud_range mm/pagewalk.c:221 [inline] walk_p4d_range mm/pagewalk.c:256 [inline] walk_pgd_range+0xa48/0x1870 mm/pagewalk.c:293 __walk_page_range+0x630/0x770 mm/pagewalk.c:395 walk_page_range+0x626/0xa80 mm/pagewalk.c:521 madvise_pageout_page_range mm/madvise.c:585 [inline] madvise_pageout+0x32c/0x820 mm/madvise.c:612 madvise_vma_behavior+0x1cc/0x1b50 mm/madvise.c:1031 madvise_walk_vmas+0x1cf/0x2c0 mm/madvise.c:1260 do_madvise+0x333/0x660 mm/madvise.c:1440 __do_sys_madvise mm/madvise.c:1453 [inline] __se_sys_madvise mm/madvise.c:1451 [inline] __x64_sys_madvise+0xa9/0x110 mm/madvise.c:1451 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0x40/0x110 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x62/0x6a RIP: 0033:0x7ffa6d07cce9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffa6dd9c0c8 EFLAGS: 00000246 ORIG_RAX: 000000000000001c RAX: ffffffffffffffda RBX: 00007ffa6d19c120 RCX: 00007ffa6d07cce9 RDX: 0000000000000015 RSI: 0000000000c00304 RDI: 0000000020000000 RBP: 00007ffa6d0c947a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000006e R14: 00007ffa6d19c120 R15: 00007ffdfe6a3f08 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:scatterwalk_start include/crypto/scatterwalk.h:63 [inline] RIP: 0010:scatterwalk_pagedone include/crypto/scatterwalk.h:83 [inline] RIP: 0010:scatterwalk_pagedone include/crypto/scatterwalk.h:72 [inline] RIP: 0010:scatterwalk_copychunks+0x3e0/0x560 crypto/scatterwalk.c:50 Code: f0 48 c1 e8 03 80 3c 08 00 0f 85 81 01 00 00 49 8d 44 24 08 4d 89 26 48 bf 00 00 00 00 00 fc ff df 48 89 44 24 10 48 c1 e8 03 <0f> b6 04 38 84 c0 74 08 3c 03 0f 8e 47 01 00 00 48 8b 44 24 08 41 RSP: 0018:ffffc900031becf0 EFLAGS: 00010202 RAX: 0000000000000001 RBX: 0000000000000000 RCX: dffffc0000000000 RDX: 0000000000040000 RSI: ffffffff8465df74 RDI: dffffc0000000000 RBP: 0000000000001000 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000002 R11: 72f16952bac14988 R12: 0000000000000000 R13: 0000000000000014 R14: ffffc900031bed88 R15: 0000000000001000 FS: 00007ffa6dd9c6c0(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020428000 CR3: 000000004bfa3000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: f0 48 c1 e8 03 lock shr $0x3,%rax 5: 80 3c 08 00 cmpb $0x0,(%rax,%rcx,1) 9: 0f 85 81 01 00 00 jne 0x190 f: 49 8d 44 24 08 lea 0x8(%r12),%rax 14: 4d 89 26 mov %r12,(%r14) 17: 48 bf 00 00 00 00 00 movabs $0xdffffc0000000000,%rdi 1e: fc ff df 21: 48 89 44 24 10 mov %rax,0x10(%rsp) 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 0f b6 04 38 movzbl (%rax,%rdi,1),%eax <-- trapping instruction 2e: 84 c0 test %al,%al 30: 74 08 je 0x3a 32: 3c 03 cmp $0x3,%al 34: 0f 8e 47 01 00 00 jle 0x181 3a: 48 8b 44 24 08 mov 0x8(%rsp),%rax 3f: 41 rex.B