Hello, syzbot has tested the proposed patch but the reproducer is still triggering an issue: BUG: unable to handle kernel NULL pointer dereference in submit_bio_noacct Unable to handle kernel NULL pointer dereference at virtual address 0000000000000018 Mem abort info: ESR = 0x0000000096000006 EC = 0x25: DABT (current EL), IL = 32 bits SET = 0, FnV = 0 EA = 0, S1PTW = 0 FSC = 0x06: level 2 translation fault Data abort info: ISV = 0, ISV = 0, ISS = 0x00000006, ISS2 = 0x00000000 CM = 0, WnR = 0, TnD = 0, TagAccess = 0 GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0 user pgtable: 4k pages, 52-bit VAs, pgdp=000000004592d480 [0000000000000018] pgd=0800000046c2f403, p4d=0800000052289403, pud=080000005227c403, pmd=0000000000000000 Internal error: Oops: 0000000096000006 [#1] SMP Modules linked in: CPU: 0 UID: 0 PID: 3990 Comm: syz.1.17 Not tainted 6.15.0-rc3-syzkaller-g5bc1018675ec-dirty #0 PREEMPT Hardware name: linux,dummy-virt (DT) pstate: 41402009 (nZcv daif +PAN -UAO -TCO +DIT -SSBS BTYPE=--) pc : bdev_get_queue include/linux/blkdev.h:951 [inline] pc : submit_bio_noacct+0x20/0x500 block/blk-core.c:780 lr : submit_bio+0xa8/0x1e0 block/blk-core.c:916 sp : ffff80008975b8a0 x29: ffff80008975b8a0 x28: f8f0000003f32000 x27: ffff80008975b9e0 x26: 0000000000000000 x25: ffff80008975b9c0 x24: 0000000000000000 x23: 0000000000000000 x22: 0000000000000000 x21: ffffc1ffc044c900 x20: 0000000000000000 x19: f8f0000003f32000 x18: 0000000000000000 x17: 0000000000000000 x16: 0000000000000000 x15: 0000000000000000 x14: ffffc1ffc044c900 x13: 0000000000000000 x12: f8f0000003f32000 x11: 0000000000000000 x10: fff000007f9ff330 x9 : 0000000000000002 x8 : 00000000000000b0 x7 : f7f000000446467c x6 : f7f00000032e0c00 x5 : f7f00000032e0c00 x4 : 0000000000000000 x3 : 0000000000000000 x2 : 0000000000000078 x1 : 0000000000000000 x0 : 0000000000080000 Call trace: submit_bio_noacct+0x20/0x500 block/blk-core.c:789 (P) submit_bio+0xa8/0x1e0 block/blk-core.c:916 mpage_bio_submit_read fs/mpage.c:75 [inline] do_mpage_readpage+0x2d8/0x6dc fs/mpage.c:296 mpage_readahead+0xcc/0x164 fs/mpage.c:371 blkdev_readahead+0x18/0x24 block/fops.c:472 read_pages+0x70/0x2b8 mm/readahead.c:160 page_cache_ra_order+0x238/0x400 mm/readahead.c:515 do_sync_mmap_readahead mm/filemap.c:3262 [inline] filemap_fault+0x444/0x924 mm/filemap.c:3403 __do_fault+0x3c/0x21c mm/memory.c:5098 do_shared_fault mm/memory.c:5582 [inline] do_fault mm/memory.c:5656 [inline] do_pte_missing mm/memory.c:4160 [inline] handle_pte_fault mm/memory.c:5997 [inline] __handle_mm_fault+0xadc/0x1b00 mm/memory.c:6140 handle_mm_fault+0x164/0x314 mm/memory.c:6309 do_page_fault+0x118/0x688 arch/arm64/mm/fault.c:647 do_translation_fault+0xac/0xbc arch/arm64/mm/fault.c:783 do_mem_abort+0x44/0x94 arch/arm64/mm/fault.c:919 el0_da+0x78/0xa8 arch/arm64/kernel/entry-common.c:604 el0t_64_sync_handler+0xc4/0x138 arch/arm64/kernel/entry-common.c:765 el0t_64_sync+0x1a4/0x1a8 arch/arm64/kernel/entry.S:600 Code: aa0003f3 a9025bf5 f9400414 b9401000 (f9400e96) ---[ end trace 0000000000000000 ]--- ---------------- Code disassembly (best guess): 0: aa0003f3 mov x19, x0 4: a9025bf5 stp x21, x22, [sp, #32] 8: f9400414 ldr x20, [x0, #8] c: b9401000 ldr w0, [x0, #16] * 10: f9400e96 ldr x22, [x20, #24] <-- trapping instruction Tested on: commit: 5bc10186 Merge tag 'pci-v6.15-fixes-3' of git://git.ke.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=11cd2374580000 kernel config: https://syzkaller.appspot.com/x/.config?x=eb8161d1e10a2d09 dashboard link: https://syzkaller.appspot.com/bug?extid=3291296495fc970e4b1c compiler: aarch64-linux-gnu-gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 userspace arch: arm64 patch: https://syzkaller.appspot.com/x/patch.diff?x=1625a368580000
